diff options
author | 2017-04-25 03:31:15 -0700 | |
---|---|---|
committer | 2017-05-22 06:48:08 +0000 | |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/roms/ipxe/src/arch/i386/interface/pcbios | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/interface/pcbios')
13 files changed, 0 insertions, 3876 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/apm.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/apm.c deleted file mode 100644 index 50b19cb81..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/apm.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * Copyright (C) 2013 Marin Hannache <ipxe@mareo.fr>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** - * @file - * - * Advanced Power Management - * - */ - -#include <errno.h> -#include <realmode.h> -#include <ipxe/reboot.h> - -/** - * Power off the computer using APM - * - * @ret rc Return status code - */ -static int apm_poweroff ( void ) { - uint16_t apm_version; - uint16_t apm_signature; - uint16_t apm_flags; - uint16_t carry; - - /* APM check */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" - "adc %%edx,0\n\t" ) - : "=a" ( apm_version ), "=b" ( apm_signature ), - "=c" ( apm_flags ), "=d" ( carry ) - : "a" ( 0x5300 ), "b" ( 0x0000 ), - "d" ( 0x0000 ) ); - if ( carry ) { - DBG ( "APM not present\n" ); - return -ENOTSUP; - } - if ( apm_signature != 0x504d ) { /* signature 'PM' */ - DBG ( "APM not present\n" ); - return -ENOTSUP; - } - if ( apm_version < 0x0101 ) { /* Need version 1.1+ */ - DBG ( "APM 1.1+ not supported\n" ); - return -ENOTSUP; - } - if ( ( apm_flags & 0x8 ) == 0x8 ) { - DBG ( "APM power management disabled\n" ); - return -EPERM; - } - DBG2 ( "APM check completed\n" ); - - /* APM initialisation */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" - "adc %%edx,0\n\t" ) - : "=d" ( carry ) - : "a" ( 0x5301 ), "b" ( 0x0000 ), - "d" ( 0x0000 ) ); - if ( carry ) { - DBG ( "APM initialisation failed\n" ); - return -EIO; - } - DBG2 ( "APM initialisation completed\n" ); - - /* Set APM driver version */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" - "adc %%edx,0\n\t" ) - : "=d" ( carry ) - : "a" ( 0x530e ), "b" ( 0x0000 ), - "c" ( 0x0101 ), "d" ( 0x0000 ) ); - if ( carry ) { - DBG ( "APM setting driver version failed\n" ); - return -EIO; - } - DBG2 ( "APM driver version set\n" ); - - /* Setting power state to off */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x15\n\t" - "adc %%edx,0\n\t" ) - : "=d" ( carry ) - : "a" ( 0x5307 ), "b" ( 0x0001 ), - "c" ( 0x0003 ), "d" ( 0x0000) ); - if ( carry ) { - DBG ( "APM setting power state failed\n" ); - return -ENOTTY; - } - - /* Should never happen */ - return -ECANCELED; -} - -PROVIDE_REBOOT ( pcbios, poweroff, apm_poweroff ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c deleted file mode 100644 index f1ba8297b..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c +++ /dev/null @@ -1,16 +0,0 @@ -#include <ipxe/nap.h> -#include <realmode.h> - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** - * Save power by halting the CPU until the next interrupt - * - */ -static void bios_cpu_nap ( void ) { - __asm__ __volatile__ ( "sti\n\t" - "hlt\n\t" - "cli\n\t" ); -} - -PROVIDE_NAP ( pcbios, cpu_nap, bios_cpu_nap ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_reboot.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_reboot.c deleted file mode 100644 index 10a1ecb89..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_reboot.c +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * Standard PC-BIOS reboot mechanism - * - */ - -#include <ipxe/reboot.h> -#include <realmode.h> -#include <bios.h> - -/** - * Reboot system - * - * @v warm Perform a warm reboot - */ -static void bios_reboot ( int warm ) { - uint16_t flag; - - /* Configure BIOS for cold/warm reboot */ - flag = ( warm ? BDA_REBOOT_WARM : 0 ); - put_real ( flag, BDA_SEG, BDA_REBOOT ); - - /* Jump to system reset vector */ - __asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) : : ); -} - -PROVIDE_REBOOT ( pcbios, reboot, bios_reboot ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_smbios.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_smbios.c deleted file mode 100644 index a8c0fc325..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_smbios.c +++ /dev/null @@ -1,65 +0,0 @@ -/* - * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <ipxe/uaccess.h> -#include <ipxe/smbios.h> -#include <realmode.h> -#include <pnpbios.h> - -/** @file - * - * System Management BIOS - * - */ - -/** - * Find SMBIOS - * - * @v smbios SMBIOS entry point descriptor structure to fill in - * @ret rc Return status code - */ -static int bios_find_smbios ( struct smbios *smbios ) { - struct smbios_entry entry; - int rc; - - /* Scan through BIOS segment to find SMBIOS entry point */ - if ( ( rc = find_smbios_entry ( real_to_user ( BIOS_SEG, 0 ), 0x10000, - &entry ) ) != 0 ) - return rc; - - /* Fill in entry point descriptor structure */ - smbios->address = phys_to_user ( entry.smbios_address ); - smbios->len = entry.smbios_len; - smbios->count = entry.smbios_count; - smbios->version = SMBIOS_VERSION ( entry.major, entry.minor ); - - return 0; -} - -PROVIDE_SMBIOS ( pcbios, find_smbios, bios_find_smbios ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_timer.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_timer.c deleted file mode 100644 index 3299c9aae..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_timer.c +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * BIOS timer - * - */ - -#include <ipxe/timer.h> -#include <realmode.h> -#include <bios.h> - -/** - * Get current system time in ticks - * - * @ret ticks Current time, in ticks - * - * Use direct memory access to BIOS variables, longword 0040:006C - * (ticks today) and byte 0040:0070 (midnight crossover flag) instead - * of calling timeofday BIOS interrupt. - */ -static unsigned long bios_currticks ( void ) { - static int days = 0; - uint32_t ticks; - uint8_t midnight; - - /* Re-enable interrupts so that the timer interrupt can occur */ - __asm__ __volatile__ ( "sti\n\t" - "nop\n\t" - "nop\n\t" - "cli\n\t" ); - - get_real ( ticks, BDA_SEG, 0x006c ); - get_real ( midnight, BDA_SEG, 0x0070 ); - - if ( midnight ) { - midnight = 0; - put_real ( midnight, BDA_SEG, 0x0070 ); - days += 0x1800b0; - } - - return ( days + ticks ); -} - -PROVIDE_TIMER_INLINE ( pcbios, udelay ); -PROVIDE_TIMER ( pcbios, currticks, bios_currticks ); -PROVIDE_TIMER_INLINE ( pcbios, ticks_per_sec ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/biosint.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/biosint.c deleted file mode 100644 index 3b8e80438..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/biosint.c +++ /dev/null @@ -1,92 +0,0 @@ -#include <errno.h> -#include <realmode.h> -#include <biosint.h> - -/** - * @file BIOS interrupts - * - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** - * Hook INT vector - * - * @v interrupt INT number - * @v handler Offset within .text16 to interrupt handler - * @v chain_vector Vector for chaining to previous handler - * - * Hooks in an i386 INT handler. The handler itself must reside - * within the .text16 segment. @c chain_vector will be filled in with - * the address of the previously-installed handler for this interrupt; - * the handler should probably exit by ljmping via this vector. - */ -void hook_bios_interrupt ( unsigned int interrupt, unsigned int handler, - struct segoff *chain_vector ) { - struct segoff vector = { - .segment = rm_cs, - .offset = handler, - }; - - DBG ( "Hooking INT %#02x to %04x:%04x\n", - interrupt, rm_cs, handler ); - - if ( ( chain_vector->segment != 0 ) || - ( chain_vector->offset != 0 ) ) { - /* Already hooked; do nothing */ - DBG ( "...already hooked\n" ); - return; - } - - copy_from_real ( chain_vector, 0, ( interrupt * 4 ), - sizeof ( *chain_vector ) ); - DBG ( "...chaining to %04x:%04x\n", - chain_vector->segment, chain_vector->offset ); - if ( DBG_LOG ) { - char code[64]; - copy_from_real ( code, chain_vector->segment, - chain_vector->offset, sizeof ( code ) ); - DBG_HDA ( *chain_vector, code, sizeof ( code ) ); - } - - copy_to_real ( 0, ( interrupt * 4 ), &vector, sizeof ( vector ) ); - hooked_bios_interrupts++; -} - -/** - * Unhook INT vector - * - * @v interrupt INT number - * @v handler Offset within .text16 to interrupt handler - * @v chain_vector Vector containing address of previous handler - * - * Unhooks an i386 interrupt handler hooked by hook_i386_vector(). - * Note that this operation may fail, if some external code has hooked - * the vector since we hooked in our handler. If it fails, it means - * that it is not possible to unhook our handler, and we must leave it - * (and its chaining vector) resident in memory. - */ -int unhook_bios_interrupt ( unsigned int interrupt, unsigned int handler, - struct segoff *chain_vector ) { - struct segoff vector; - - DBG ( "Unhooking INT %#02x from %04x:%04x\n", - interrupt, rm_cs, handler ); - - copy_from_real ( &vector, 0, ( interrupt * 4 ), sizeof ( vector ) ); - if ( ( vector.segment != rm_cs ) || ( vector.offset != handler ) ) { - DBG ( "...cannot unhook; vector points to %04x:%04x\n", - vector.segment, vector.offset ); - return -EBUSY; - } - - DBG ( "...restoring to %04x:%04x\n", - chain_vector->segment, chain_vector->offset ); - copy_to_real ( 0, ( interrupt * 4 ), chain_vector, - sizeof ( *chain_vector ) ); - - chain_vector->segment = 0; - chain_vector->offset = 0; - hooked_bios_interrupts--; - return 0; -} diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13.c deleted file mode 100644 index f0450da90..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13.c +++ /dev/null @@ -1,1993 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <stdlib.h> -#include <limits.h> -#include <byteswap.h> -#include <errno.h> -#include <assert.h> -#include <ipxe/list.h> -#include <ipxe/blockdev.h> -#include <ipxe/io.h> -#include <ipxe/open.h> -#include <ipxe/uri.h> -#include <ipxe/process.h> -#include <ipxe/xfer.h> -#include <ipxe/retry.h> -#include <ipxe/timer.h> -#include <ipxe/acpi.h> -#include <ipxe/sanboot.h> -#include <ipxe/device.h> -#include <ipxe/pci.h> -#include <ipxe/iso9660.h> -#include <ipxe/eltorito.h> -#include <realmode.h> -#include <bios.h> -#include <biosint.h> -#include <bootsector.h> -#include <int13.h> - -/** @file - * - * INT 13 emulation - * - * This module provides a mechanism for exporting block devices via - * the BIOS INT 13 disk interrupt interface. - * - */ - -/** - * Overall timeout for INT 13 commands (independent of underlying device - * - * Underlying devices should ideally never become totally stuck. - * However, if they do, then the INT 13 mechanism provides no means - * for the caller to cancel the operation, and the machine appears to - * hang. Use an overall timeout for all commands to avoid this - * problem and bounce timeout failures to the caller. - */ -#define INT13_COMMAND_TIMEOUT ( 15 * TICKS_PER_SEC ) - -/** An INT 13 emulated drive */ -struct int13_drive { - /** Reference count */ - struct refcnt refcnt; - /** List of all registered drives */ - struct list_head list; - - /** Block device URI */ - struct uri *uri; - /** Underlying block device interface */ - struct interface block; - - /** BIOS in-use drive number (0x00-0xff) */ - unsigned int drive; - /** BIOS natural drive number (0x00-0xff) - * - * This is the drive number that would have been assigned by - * 'naturally' appending the drive to the end of the BIOS - * drive list. - * - * If the emulated drive replaces a preexisting drive, this is - * the drive number that the preexisting drive gets remapped - * to. - */ - unsigned int natural_drive; - - /** Block device capacity */ - struct block_device_capacity capacity; - /** INT 13 emulated blocksize shift - * - * To allow for emulation of CD-ROM access, this represents - * the left-shift required to translate from INT 13 blocks to - * underlying blocks. - */ - unsigned int blksize_shift; - - /** Number of cylinders - * - * The cylinder number field in an INT 13 call is ten bits - * wide, giving a maximum of 1024 cylinders. Conventionally, - * when the 7.8GB limit of a CHS address is exceeded, it is - * the number of cylinders that is increased beyond the - * addressable limit. - */ - unsigned int cylinders; - /** Number of heads - * - * The head number field in an INT 13 call is eight bits wide, - * giving a maximum of 256 heads. However, apparently all - * versions of MS-DOS up to and including Win95 fail with 256 - * heads, so the maximum encountered in practice is 255. - */ - unsigned int heads; - /** Number of sectors per track - * - * The sector number field in an INT 13 call is six bits wide, - * giving a maximum of 63 sectors, since sector numbering - * (unlike head and cylinder numbering) starts at 1, not 0. - */ - unsigned int sectors_per_track; - - /** Drive is a CD-ROM */ - int is_cdrom; - /** Address of El Torito boot catalog (if any) */ - unsigned int boot_catalog; - - /** Underlying device status, if in error */ - int block_rc; - /** Status of last operation */ - int last_status; -}; - -/** Vector for chaining to other INT 13 handlers */ -static struct segoff __text16 ( int13_vector ); -#define int13_vector __use_text16 ( int13_vector ) - -/** Assembly wrapper */ -extern void int13_wrapper ( void ); - -/** Dummy floppy disk parameter table */ -static struct int13_fdd_parameters __data16 ( int13_fdd_params ) = { - /* 512 bytes per sector */ - .bytes_per_sector = 0x02, - /* Highest sectors per track that we ever return */ - .sectors_per_track = 48, -}; -#define int13_fdd_params __use_data16 ( int13_fdd_params ) - -/** List of registered emulated drives */ -static LIST_HEAD ( int13s ); - -/** - * Equipment word - * - * This is a cached copy of the BIOS Data Area equipment word at - * 40:10. - */ -static uint16_t equipment_word; - -/** - * Number of BIOS floppy disk drives - * - * This is derived from the equipment word. It is held in .text16 to - * allow for easy access by the INT 13,08 wrapper. - */ -static uint8_t __text16 ( num_fdds ); -#define num_fdds __use_text16 ( num_fdds ) - -/** - * Number of BIOS hard disk drives - * - * This is a cached copy of the BIOS Data Area number of hard disk - * drives at 40:75. It is held in .text16 to allow for easy access by - * the INT 13,08 wrapper. - */ -static uint8_t __text16 ( num_drives ); -#define num_drives __use_text16 ( num_drives ) - -/** - * Calculate INT 13 drive sector size - * - * @v int13 Emulated drive - * @ret blksize Sector size - */ -static inline size_t int13_blksize ( struct int13_drive *int13 ) { - return ( int13->capacity.blksize << int13->blksize_shift ); -} - -/** - * Calculate INT 13 drive capacity - * - * @v int13 Emulated drive - * @ret blocks Number of blocks - */ -static inline uint64_t int13_capacity ( struct int13_drive *int13 ) { - return ( int13->capacity.blocks >> int13->blksize_shift ); -} - -/** - * Calculate INT 13 drive capacity (limited to 32 bits) - * - * @v int13 Emulated drive - * @ret blocks Number of blocks - */ -static inline uint32_t int13_capacity32 ( struct int13_drive *int13 ) { - uint64_t capacity = int13_capacity ( int13 ); - return ( ( capacity <= 0xffffffffUL ) ? capacity : 0xffffffff ); -} - -/** - * Test if INT 13 drive is a floppy disk drive - * - * @v int13 Emulated drive - * @ret is_fdd Emulated drive is a floppy disk - */ -static inline int int13_is_fdd ( struct int13_drive *int13 ) { - return ( ! ( int13->drive & 0x80 ) ); -} - -/** An INT 13 command */ -struct int13_command { - /** Status */ - int rc; - /** INT 13 drive */ - struct int13_drive *int13; - /** Underlying block device interface */ - struct interface block; - /** Command timeout timer */ - struct retry_timer timer; -}; - -/** - * Record INT 13 drive capacity - * - * @v command INT 13 command - * @v capacity Block device capacity - */ -static void int13_command_capacity ( struct int13_command *command, - struct block_device_capacity *capacity ) { - memcpy ( &command->int13->capacity, capacity, - sizeof ( command->int13->capacity ) ); -} - -/** - * Close INT 13 command - * - * @v command INT 13 command - * @v rc Reason for close - */ -static void int13_command_close ( struct int13_command *command, int rc ) { - intf_restart ( &command->block, rc ); - stop_timer ( &command->timer ); - command->rc = rc; -} - -/** - * Handle INT 13 command timer expiry - * - * @v timer Timer - */ -static void int13_command_expired ( struct retry_timer *timer, - int over __unused ) { - struct int13_command *command = - container_of ( timer, struct int13_command, timer ); - - int13_command_close ( command, -ETIMEDOUT ); -} - -/** INT 13 command interface operations */ -static struct interface_operation int13_command_op[] = { - INTF_OP ( intf_close, struct int13_command *, int13_command_close ), - INTF_OP ( block_capacity, struct int13_command *, - int13_command_capacity ), -}; - -/** INT 13 command interface descriptor */ -static struct interface_descriptor int13_command_desc = - INTF_DESC ( struct int13_command, block, int13_command_op ); - -/** - * Open (or reopen) INT 13 emulated drive underlying block device - * - * @v int13 Emulated drive - * @ret rc Return status code - */ -static int int13_reopen_block ( struct int13_drive *int13 ) { - int rc; - - /* Close any existing block device */ - intf_restart ( &int13->block, -ECONNRESET ); - - /* Open block device */ - if ( ( rc = xfer_open_uri ( &int13->block, int13->uri ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not reopen block " - "device: %s\n", int13->drive, strerror ( rc ) ); - int13->block_rc = rc; - return rc; - } - - /* Clear block device error status */ - int13->block_rc = 0; - - return 0; -} - -/** - * Prepare to issue INT 13 command - * - * @v command INT 13 command - * @v int13 Emulated drive - * @ret rc Return status code - */ -static int int13_command_start ( struct int13_command *command, - struct int13_drive *int13 ) { - int rc; - - /* Sanity check */ - assert ( command->int13 == NULL ); - assert ( ! timer_running ( &command->timer ) ); - - /* Reopen block device if necessary */ - if ( ( int13->block_rc != 0 ) && - ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) ) - return rc; - - /* Initialise command */ - command->rc = -EINPROGRESS; - command->int13 = int13; - start_timer_fixed ( &command->timer, INT13_COMMAND_TIMEOUT ); - - /* Wait for block control interface to become ready */ - while ( ( command->rc == -EINPROGRESS ) && - ( xfer_window ( &int13->block ) == 0 ) ) { - step(); - } - - return ( ( command->rc == -EINPROGRESS ) ? - int13->block_rc : command->rc ); -} - -/** - * Wait for INT 13 command to complete - * - * @v command INT 13 command - * @ret rc Return status code - */ -static int int13_command_wait ( struct int13_command *command ) { - - /* Sanity check */ - assert ( timer_running ( &command->timer ) ); - - /* Wait for command to complete */ - while ( command->rc == -EINPROGRESS ) - step(); - - assert ( ! timer_running ( &command->timer ) ); - return command->rc; -} - -/** - * Terminate INT 13 command - * - * @v command INT 13 command - */ -static void int13_command_stop ( struct int13_command *command ) { - stop_timer ( &command->timer ); - command->int13 = NULL; -} - -/** The single active INT 13 command */ -static struct int13_command int13_command = { - .block = INTF_INIT ( int13_command_desc ), - .timer = TIMER_INIT ( int13_command_expired ), -}; - -/** - * Read from or write to INT 13 drive - * - * @v int13 Emulated drive - * @v lba Starting logical block address - * @v count Number of logical blocks - * @v buffer Data buffer - * @v block_rw Block read/write method - * @ret rc Return status code - */ -static int int13_rw ( struct int13_drive *int13, uint64_t lba, - unsigned int count, userptr_t buffer, - int ( * block_rw ) ( struct interface *control, - struct interface *data, - uint64_t lba, unsigned int count, - userptr_t buffer, size_t len ) ) { - struct int13_command *command = &int13_command; - unsigned int frag_count; - size_t frag_len; - int rc; - - /* Translate to underlying blocksize */ - lba <<= int13->blksize_shift; - count <<= int13->blksize_shift; - - while ( count ) { - - /* Determine fragment length */ - frag_count = count; - if ( frag_count > int13->capacity.max_count ) - frag_count = int13->capacity.max_count; - frag_len = ( int13->capacity.blksize * frag_count ); - - /* Issue command */ - if ( ( ( rc = int13_command_start ( command, int13 ) ) != 0 ) || - ( ( rc = block_rw ( &int13->block, &command->block, lba, - frag_count, buffer, - frag_len ) ) != 0 ) || - ( ( rc = int13_command_wait ( command ) ) != 0 ) ) { - int13_command_stop ( command ); - return rc; - } - int13_command_stop ( command ); - - /* Move to next fragment */ - lba += frag_count; - count -= frag_count; - buffer = userptr_add ( buffer, frag_len ); - } - - return 0; -} - -/** - * Read INT 13 drive capacity - * - * @v int13 Emulated drive - * @ret rc Return status code - */ -static int int13_read_capacity ( struct int13_drive *int13 ) { - struct int13_command *command = &int13_command; - int rc; - - /* Issue command */ - if ( ( ( rc = int13_command_start ( command, int13 ) ) != 0 ) || - ( ( rc = block_read_capacity ( &int13->block, - &command->block ) ) != 0 ) || - ( ( rc = int13_command_wait ( command ) ) != 0 ) ) { - int13_command_stop ( command ); - return rc; - } - - int13_command_stop ( command ); - return 0; -} - -/** - * Parse ISO9660 parameters - * - * @v int13 Emulated drive - * @v scratch Scratch area for single-sector reads - * @ret rc Return status code - * - * Reads and parses ISO9660 parameters, if present. - */ -static int int13_parse_iso9660 ( struct int13_drive *int13, void *scratch ) { - static const struct iso9660_primary_descriptor_fixed primary_check = { - .type = ISO9660_TYPE_PRIMARY, - .id = ISO9660_ID, - }; - struct iso9660_primary_descriptor *primary = scratch; - static const struct eltorito_descriptor_fixed boot_check = { - .type = ISO9660_TYPE_BOOT, - .id = ISO9660_ID, - .version = 1, - .system_id = "EL TORITO SPECIFICATION", - }; - struct eltorito_descriptor *boot = scratch; - unsigned int blksize; - unsigned int blksize_shift; - int rc; - - /* Calculate required blocksize shift */ - blksize = int13_blksize ( int13 ); - blksize_shift = 0; - while ( blksize < ISO9660_BLKSIZE ) { - blksize <<= 1; - blksize_shift++; - } - if ( blksize > ISO9660_BLKSIZE ) { - /* Do nothing if the blksize is invalid for CD-ROM access */ - return 0; - } - - /* Read primary volume descriptor */ - if ( ( rc = int13_rw ( int13, - ( ISO9660_PRIMARY_LBA << blksize_shift ), 1, - virt_to_user ( primary ), block_read ) ) != 0 ){ - DBGC ( int13, "INT13 drive %02x could not read ISO9660 " - "primary volume descriptor: %s\n", - int13->drive, strerror ( rc ) ); - return rc; - } - - /* Do nothing unless this is an ISO image */ - if ( memcmp ( primary, &primary_check, sizeof ( primary_check ) ) != 0 ) - return 0; - DBGC ( int13, "INT13 drive %02x contains an ISO9660 filesystem; " - "treating as CD-ROM\n", int13->drive ); - int13->is_cdrom = 1; - - /* Read boot record volume descriptor */ - if ( ( rc = int13_rw ( int13, - ( ELTORITO_LBA << blksize_shift ), 1, - virt_to_user ( boot ), block_read ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not read El Torito boot " - "record volume descriptor: %s\n", - int13->drive, strerror ( rc ) ); - return rc; - } - - /* Check for an El Torito boot catalog */ - if ( memcmp ( boot, &boot_check, sizeof ( boot_check ) ) == 0 ) { - int13->boot_catalog = boot->sector; - DBGC ( int13, "INT13 drive %02x has an El Torito boot catalog " - "at LBA %08x\n", int13->drive, int13->boot_catalog ); - } else { - DBGC ( int13, "INT13 drive %02x has no El Torito boot " - "catalog\n", int13->drive ); - } - - /* Configure drive for no-emulation CD-ROM access */ - int13->blksize_shift += blksize_shift; - - return 0; -} - -/** - * Guess INT 13 hard disk drive geometry - * - * @v int13 Emulated drive - * @v scratch Scratch area for single-sector reads - * @ret heads Guessed number of heads - * @ret sectors Guessed number of sectors per track - * @ret rc Return status code - * - * Guesses the drive geometry by inspecting the partition table. - */ -static int int13_guess_geometry_hdd ( struct int13_drive *int13, void *scratch, - unsigned int *heads, - unsigned int *sectors ) { - struct master_boot_record *mbr = scratch; - struct partition_table_entry *partition; - unsigned int i; - int rc; - - /* Default guess is xx/255/63 */ - *heads = 255; - *sectors = 63; - - /* Read partition table */ - if ( ( rc = int13_rw ( int13, 0, 1, virt_to_user ( mbr ), - block_read ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not read " - "partition table to guess geometry: %s\n", - int13->drive, strerror ( rc ) ); - return rc; - } - DBGC2 ( int13, "INT13 drive %02x has MBR:\n", int13->drive ); - DBGC2_HDA ( int13, 0, mbr, sizeof ( *mbr ) ); - DBGC ( int13, "INT13 drive %02x has signature %08x\n", - int13->drive, mbr->signature ); - - /* Scan through partition table and modify guesses for - * heads and sectors_per_track if we find any used - * partitions. - */ - for ( i = 0 ; i < 4 ; i++ ) { - partition = &mbr->partitions[i]; - if ( ! partition->type ) - continue; - *heads = ( PART_HEAD ( partition->chs_end ) + 1 ); - *sectors = PART_SECTOR ( partition->chs_end ); - DBGC ( int13, "INT13 drive %02x guessing C/H/S xx/%d/%d based " - "on partition %d\n", - int13->drive, *heads, *sectors, ( i + 1 ) ); - } - - return 0; -} - -/** Recognised floppy disk geometries */ -static const struct int13_fdd_geometry int13_fdd_geometries[] = { - INT13_FDD_GEOMETRY ( 40, 1, 8 ), - INT13_FDD_GEOMETRY ( 40, 1, 9 ), - INT13_FDD_GEOMETRY ( 40, 2, 8 ), - INT13_FDD_GEOMETRY ( 40, 1, 9 ), - INT13_FDD_GEOMETRY ( 80, 2, 8 ), - INT13_FDD_GEOMETRY ( 80, 2, 9 ), - INT13_FDD_GEOMETRY ( 80, 2, 15 ), - INT13_FDD_GEOMETRY ( 80, 2, 18 ), - INT13_FDD_GEOMETRY ( 80, 2, 20 ), - INT13_FDD_GEOMETRY ( 80, 2, 21 ), - INT13_FDD_GEOMETRY ( 82, 2, 21 ), - INT13_FDD_GEOMETRY ( 83, 2, 21 ), - INT13_FDD_GEOMETRY ( 80, 2, 22 ), - INT13_FDD_GEOMETRY ( 80, 2, 23 ), - INT13_FDD_GEOMETRY ( 80, 2, 24 ), - INT13_FDD_GEOMETRY ( 80, 2, 36 ), - INT13_FDD_GEOMETRY ( 80, 2, 39 ), - INT13_FDD_GEOMETRY ( 80, 2, 40 ), - INT13_FDD_GEOMETRY ( 80, 2, 44 ), - INT13_FDD_GEOMETRY ( 80, 2, 48 ), -}; - -/** - * Guess INT 13 floppy disk drive geometry - * - * @v int13 Emulated drive - * @ret heads Guessed number of heads - * @ret sectors Guessed number of sectors per track - * @ret rc Return status code - * - * Guesses the drive geometry by inspecting the disk size. - */ -static int int13_guess_geometry_fdd ( struct int13_drive *int13, - unsigned int *heads, - unsigned int *sectors ) { - unsigned int blocks = int13_capacity ( int13 ); - const struct int13_fdd_geometry *geometry; - unsigned int cylinders; - unsigned int i; - - /* Look for a match against a known geometry */ - for ( i = 0 ; i < ( sizeof ( int13_fdd_geometries ) / - sizeof ( int13_fdd_geometries[0] ) ) ; i++ ) { - geometry = &int13_fdd_geometries[i]; - cylinders = INT13_FDD_CYLINDERS ( geometry ); - *heads = INT13_FDD_HEADS ( geometry ); - *sectors = INT13_FDD_SECTORS ( geometry ); - if ( ( cylinders * (*heads) * (*sectors) ) == blocks ) { - DBGC ( int13, "INT13 drive %02x guessing C/H/S " - "%d/%d/%d based on size %dK\n", int13->drive, - cylinders, *heads, *sectors, ( blocks / 2 ) ); - return 0; - } - } - - /* Otherwise, assume a partial disk image in the most common - * format (1440K, 80/2/18). - */ - *heads = 2; - *sectors = 18; - DBGC ( int13, "INT13 drive %02x guessing C/H/S xx/%d/%d based on size " - "%dK\n", int13->drive, *heads, *sectors, ( blocks / 2 ) ); - return 0; -} - -/** - * Guess INT 13 drive geometry - * - * @v int13 Emulated drive - * @v scratch Scratch area for single-sector reads - * @ret rc Return status code - */ -static int int13_guess_geometry ( struct int13_drive *int13, void *scratch ) { - unsigned int guessed_heads; - unsigned int guessed_sectors; - unsigned int blocks; - unsigned int blocks_per_cyl; - int rc; - - /* Don't even try when the blksize is invalid for C/H/S access */ - if ( int13_blksize ( int13 ) != INT13_BLKSIZE ) - return 0; - - /* Guess geometry according to drive type */ - if ( int13_is_fdd ( int13 ) ) { - if ( ( rc = int13_guess_geometry_fdd ( int13, &guessed_heads, - &guessed_sectors )) != 0) - return rc; - } else { - if ( ( rc = int13_guess_geometry_hdd ( int13, scratch, - &guessed_heads, - &guessed_sectors )) != 0) - return rc; - } - - /* Apply guesses if no geometry already specified */ - if ( ! int13->heads ) - int13->heads = guessed_heads; - if ( ! int13->sectors_per_track ) - int13->sectors_per_track = guessed_sectors; - if ( ! int13->cylinders ) { - /* Avoid attempting a 64-bit divide on a 32-bit system */ - blocks = int13_capacity32 ( int13 ); - blocks_per_cyl = ( int13->heads * int13->sectors_per_track ); - assert ( blocks_per_cyl != 0 ); - int13->cylinders = ( blocks / blocks_per_cyl ); - if ( int13->cylinders > 1024 ) - int13->cylinders = 1024; - } - - return 0; -} - -/** - * Update BIOS drive count - */ -static void int13_sync_num_drives ( void ) { - struct int13_drive *int13; - uint8_t *counter; - uint8_t max_drive; - uint8_t required; - - /* Get current drive counts */ - get_real ( equipment_word, BDA_SEG, BDA_EQUIPMENT_WORD ); - get_real ( num_drives, BDA_SEG, BDA_NUM_DRIVES ); - num_fdds = ( ( equipment_word & 0x0001 ) ? - ( ( ( equipment_word >> 6 ) & 0x3 ) + 1 ) : 0 ); - - /* Ensure count is large enough to cover all of our emulated drives */ - list_for_each_entry ( int13, &int13s, list ) { - counter = ( int13_is_fdd ( int13 ) ? &num_fdds : &num_drives ); - max_drive = int13->drive; - if ( max_drive < int13->natural_drive ) - max_drive = int13->natural_drive; - required = ( ( max_drive & 0x7f ) + 1 ); - if ( *counter < required ) { - *counter = required; - DBGC ( int13, "INT13 drive %02x added to drive count: " - "%d HDDs, %d FDDs\n", - int13->drive, num_drives, num_fdds ); - } - } - - /* Update current drive count */ - equipment_word &= ~( ( 0x3 << 6 ) | 0x0001 ); - if ( num_fdds ) { - equipment_word |= ( 0x0001 | - ( ( ( num_fdds - 1 ) & 0x3 ) << 6 ) ); - } - put_real ( equipment_word, BDA_SEG, BDA_EQUIPMENT_WORD ); - put_real ( num_drives, BDA_SEG, BDA_NUM_DRIVES ); -} - -/** - * Check number of drives - */ -static void int13_check_num_drives ( void ) { - uint16_t check_equipment_word; - uint8_t check_num_drives; - - get_real ( check_equipment_word, BDA_SEG, BDA_EQUIPMENT_WORD ); - get_real ( check_num_drives, BDA_SEG, BDA_NUM_DRIVES ); - if ( ( check_equipment_word != equipment_word ) || - ( check_num_drives != num_drives ) ) { - int13_sync_num_drives(); - } -} - -/** - * INT 13, 00 - Reset disk system - * - * @v int13 Emulated drive - * @ret status Status code - */ -static int int13_reset ( struct int13_drive *int13, - struct i386_all_regs *ix86 __unused ) { - int rc; - - DBGC2 ( int13, "Reset drive\n" ); - - /* Reopen underlying block device */ - if ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) - return -INT13_STATUS_RESET_FAILED; - - /* Check that block device is functional */ - if ( ( rc = int13_read_capacity ( int13 ) ) != 0 ) - return -INT13_STATUS_RESET_FAILED; - - return 0; -} - -/** - * INT 13, 01 - Get status of last operation - * - * @v int13 Emulated drive - * @ret status Status code - */ -static int int13_get_last_status ( struct int13_drive *int13, - struct i386_all_regs *ix86 __unused ) { - DBGC2 ( int13, "Get status of last operation\n" ); - return int13->last_status; -} - -/** - * Read / write sectors - * - * @v int13 Emulated drive - * @v al Number of sectors to read or write (must be nonzero) - * @v ch Low bits of cylinder number - * @v cl (bits 7:6) High bits of cylinder number - * @v cl (bits 5:0) Sector number - * @v dh Head number - * @v es:bx Data buffer - * @v block_rw Block read/write method - * @ret status Status code - * @ret al Number of sectors read or written - */ -static int int13_rw_sectors ( struct int13_drive *int13, - struct i386_all_regs *ix86, - int ( * block_rw ) ( struct interface *control, - struct interface *data, - uint64_t lba, - unsigned int count, - userptr_t buffer, - size_t len ) ) { - unsigned int cylinder, head, sector; - unsigned long lba; - unsigned int count; - userptr_t buffer; - int rc; - - /* Validate blocksize */ - if ( int13_blksize ( int13 ) != INT13_BLKSIZE ) { - DBGC ( int13, "\nINT 13 drive %02x invalid blocksize (%zd) " - "for non-extended read/write\n", - int13->drive, int13_blksize ( int13 ) ); - return -INT13_STATUS_INVALID; - } - - /* Calculate parameters */ - cylinder = ( ( ( ix86->regs.cl & 0xc0 ) << 2 ) | ix86->regs.ch ); - head = ix86->regs.dh; - sector = ( ix86->regs.cl & 0x3f ); - if ( ( cylinder >= int13->cylinders ) || - ( head >= int13->heads ) || - ( sector < 1 ) || ( sector > int13->sectors_per_track ) ) { - DBGC ( int13, "C/H/S %d/%d/%d out of range for geometry " - "%d/%d/%d\n", cylinder, head, sector, int13->cylinders, - int13->heads, int13->sectors_per_track ); - return -INT13_STATUS_INVALID; - } - lba = ( ( ( ( cylinder * int13->heads ) + head ) - * int13->sectors_per_track ) + sector - 1 ); - count = ix86->regs.al; - buffer = real_to_user ( ix86->segs.es, ix86->regs.bx ); - - DBGC2 ( int13, "C/H/S %d/%d/%d = LBA %08lx <-> %04x:%04x (count %d)\n", - cylinder, head, sector, lba, ix86->segs.es, ix86->regs.bx, - count ); - - /* Read from / write to block device */ - if ( ( rc = int13_rw ( int13, lba, count, buffer, block_rw ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x I/O failed: %s\n", - int13->drive, strerror ( rc ) ); - return -INT13_STATUS_READ_ERROR; - } - - return 0; -} - -/** - * INT 13, 02 - Read sectors - * - * @v int13 Emulated drive - * @v al Number of sectors to read (must be nonzero) - * @v ch Low bits of cylinder number - * @v cl (bits 7:6) High bits of cylinder number - * @v cl (bits 5:0) Sector number - * @v dh Head number - * @v es:bx Data buffer - * @ret status Status code - * @ret al Number of sectors read - */ -static int int13_read_sectors ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - DBGC2 ( int13, "Read: " ); - return int13_rw_sectors ( int13, ix86, block_read ); -} - -/** - * INT 13, 03 - Write sectors - * - * @v int13 Emulated drive - * @v al Number of sectors to write (must be nonzero) - * @v ch Low bits of cylinder number - * @v cl (bits 7:6) High bits of cylinder number - * @v cl (bits 5:0) Sector number - * @v dh Head number - * @v es:bx Data buffer - * @ret status Status code - * @ret al Number of sectors written - */ -static int int13_write_sectors ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - DBGC2 ( int13, "Write: " ); - return int13_rw_sectors ( int13, ix86, block_write ); -} - -/** - * INT 13, 08 - Get drive parameters - * - * @v int13 Emulated drive - * @ret status Status code - * @ret ch Low bits of maximum cylinder number - * @ret cl (bits 7:6) High bits of maximum cylinder number - * @ret cl (bits 5:0) Maximum sector number - * @ret dh Maximum head number - * @ret dl Number of drives - */ -static int int13_get_parameters ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - unsigned int max_cylinder = int13->cylinders - 1; - unsigned int max_head = int13->heads - 1; - unsigned int max_sector = int13->sectors_per_track; /* sic */ - - DBGC2 ( int13, "Get drive parameters\n" ); - - /* Validate blocksize */ - if ( int13_blksize ( int13 ) != INT13_BLKSIZE ) { - DBGC ( int13, "\nINT 13 drive %02x invalid blocksize (%zd) " - "for non-extended parameters\n", - int13->drive, int13_blksize ( int13 ) ); - return -INT13_STATUS_INVALID; - } - - /* Common parameters */ - ix86->regs.ch = ( max_cylinder & 0xff ); - ix86->regs.cl = ( ( ( max_cylinder >> 8 ) << 6 ) | max_sector ); - ix86->regs.dh = max_head; - ix86->regs.dl = ( int13_is_fdd ( int13 ) ? num_fdds : num_drives ); - - /* Floppy-specific parameters */ - if ( int13_is_fdd ( int13 ) ) { - ix86->regs.bl = INT13_FDD_TYPE_1M44; - ix86->segs.es = rm_ds; - ix86->regs.di = __from_data16 ( &int13_fdd_params ); - } - - return 0; -} - -/** - * INT 13, 15 - Get disk type - * - * @v int13 Emulated drive - * @ret ah Type code - * @ret cx:dx Sector count - * @ret status Status code / disk type - */ -static int int13_get_disk_type ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - uint32_t blocks; - - DBGC2 ( int13, "Get disk type\n" ); - - if ( int13_is_fdd ( int13 ) ) { - return INT13_DISK_TYPE_FDD; - } else { - blocks = int13_capacity32 ( int13 ); - ix86->regs.cx = ( blocks >> 16 ); - ix86->regs.dx = ( blocks & 0xffff ); - return INT13_DISK_TYPE_HDD; - } -} - -/** - * INT 13, 41 - Extensions installation check - * - * @v int13 Emulated drive - * @v bx 0x55aa - * @ret bx 0xaa55 - * @ret cx Extensions API support bitmap - * @ret status Status code / API version - */ -static int int13_extension_check ( struct int13_drive *int13 __unused, - struct i386_all_regs *ix86 ) { - if ( ix86->regs.bx == 0x55aa ) { - DBGC2 ( int13, "INT13 extensions installation check\n" ); - ix86->regs.bx = 0xaa55; - ix86->regs.cx = ( INT13_EXTENSION_LINEAR | - INT13_EXTENSION_EDD | - INT13_EXTENSION_64BIT ); - return INT13_EXTENSION_VER_3_0; - } else { - return -INT13_STATUS_INVALID; - } -} - -/** - * Extended read / write - * - * @v int13 Emulated drive - * @v ds:si Disk address packet - * @v block_rw Block read/write method - * @ret status Status code - */ -static int int13_extended_rw ( struct int13_drive *int13, - struct i386_all_regs *ix86, - int ( * block_rw ) ( struct interface *control, - struct interface *data, - uint64_t lba, - unsigned int count, - userptr_t buffer, - size_t len ) ) { - struct int13_disk_address addr; - uint8_t bufsize; - uint64_t lba; - unsigned long count; - userptr_t buffer; - int rc; - - /* Extended reads are not allowed on floppy drives. - * ELTORITO.SYS seems to assume that we are really a CD-ROM if - * we support extended reads for a floppy drive. - */ - if ( int13_is_fdd ( int13 ) ) - return -INT13_STATUS_INVALID; - - /* Get buffer size */ - get_real ( bufsize, ix86->segs.ds, - ( ix86->regs.si + offsetof ( typeof ( addr ), bufsize ) ) ); - if ( bufsize < offsetof ( typeof ( addr ), buffer_phys ) ) { - DBGC2 ( int13, "<invalid buffer size %#02x\n>\n", bufsize ); - return -INT13_STATUS_INVALID; - } - - /* Read parameters from disk address structure */ - memset ( &addr, 0, sizeof ( addr ) ); - copy_from_real ( &addr, ix86->segs.ds, ix86->regs.si, bufsize ); - lba = addr.lba; - DBGC2 ( int13, "LBA %08llx <-> ", ( ( unsigned long long ) lba ) ); - if ( ( addr.count == 0xff ) || - ( ( addr.buffer.segment == 0xffff ) && - ( addr.buffer.offset == 0xffff ) ) ) { - buffer = phys_to_user ( addr.buffer_phys ); - DBGC2 ( int13, "%08llx", - ( ( unsigned long long ) addr.buffer_phys ) ); - } else { - buffer = real_to_user ( addr.buffer.segment, - addr.buffer.offset ); - DBGC2 ( int13, "%04x:%04x", addr.buffer.segment, - addr.buffer.offset ); - } - if ( addr.count <= 0x7f ) { - count = addr.count; - } else if ( addr.count == 0xff ) { - count = addr.long_count; - } else { - DBGC2 ( int13, " <invalid count %#02x>\n", addr.count ); - return -INT13_STATUS_INVALID; - } - DBGC2 ( int13, " (count %ld)\n", count ); - - /* Read from / write to block device */ - if ( ( rc = int13_rw ( int13, lba, count, buffer, block_rw ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x extended I/O failed: %s\n", - int13->drive, strerror ( rc ) ); - /* Record that no blocks were transferred successfully */ - addr.count = 0; - put_real ( addr.count, ix86->segs.ds, - ( ix86->regs.si + - offsetof ( typeof ( addr ), count ) ) ); - return -INT13_STATUS_READ_ERROR; - } - - return 0; -} - -/** - * INT 13, 42 - Extended read - * - * @v int13 Emulated drive - * @v ds:si Disk address packet - * @ret status Status code - */ -static int int13_extended_read ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - DBGC2 ( int13, "Extended read: " ); - return int13_extended_rw ( int13, ix86, block_read ); -} - -/** - * INT 13, 43 - Extended write - * - * @v int13 Emulated drive - * @v ds:si Disk address packet - * @ret status Status code - */ -static int int13_extended_write ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - DBGC2 ( int13, "Extended write: " ); - return int13_extended_rw ( int13, ix86, block_write ); -} - -/** - * INT 13, 44 - Verify sectors - * - * @v int13 Emulated drive - * @v ds:si Disk address packet - * @ret status Status code - */ -static int int13_extended_verify ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - struct int13_disk_address addr; - uint64_t lba; - unsigned long count; - - /* Read parameters from disk address structure */ - if ( DBG_EXTRA ) { - copy_from_real ( &addr, ix86->segs.ds, ix86->regs.si, - sizeof ( addr )); - lba = addr.lba; - count = addr.count; - DBGC2 ( int13, "Verify: LBA %08llx (count %ld)\n", - ( ( unsigned long long ) lba ), count ); - } - - /* We have no mechanism for verifying sectors */ - return -INT13_STATUS_INVALID; -} - -/** - * INT 13, 44 - Extended seek - * - * @v int13 Emulated drive - * @v ds:si Disk address packet - * @ret status Status code - */ -static int int13_extended_seek ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - struct int13_disk_address addr; - uint64_t lba; - unsigned long count; - - /* Read parameters from disk address structure */ - if ( DBG_EXTRA ) { - copy_from_real ( &addr, ix86->segs.ds, ix86->regs.si, - sizeof ( addr )); - lba = addr.lba; - count = addr.count; - DBGC2 ( int13, "Seek: LBA %08llx (count %ld)\n", - ( ( unsigned long long ) lba ), count ); - } - - /* Ignore and return success */ - return 0; -} - -/** - * Build device path information - * - * @v int13 Emulated drive - * @v dpi Device path information - * @ret rc Return status code - */ -static int int13_device_path_info ( struct int13_drive *int13, - struct edd_device_path_information *dpi ) { - struct device *device; - struct device_description *desc; - unsigned int i; - uint8_t sum = 0; - int rc; - - /* Reopen block device if necessary */ - if ( ( int13->block_rc != 0 ) && - ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) ) - return rc; - - /* Get underlying hardware device */ - device = identify_device ( &int13->block ); - if ( ! device ) { - DBGC ( int13, "INT13 drive %02x cannot identify hardware " - "device\n", int13->drive ); - return -ENODEV; - } - - /* Fill in bus type and interface path */ - desc = &device->desc; - switch ( desc->bus_type ) { - case BUS_TYPE_PCI: - dpi->host_bus_type.type = EDD_BUS_TYPE_PCI; - dpi->interface_path.pci.bus = PCI_BUS ( desc->location ); - dpi->interface_path.pci.slot = PCI_SLOT ( desc->location ); - dpi->interface_path.pci.function = PCI_FUNC ( desc->location ); - dpi->interface_path.pci.channel = 0xff; /* unused */ - break; - default: - DBGC ( int13, "INT13 drive %02x unrecognised bus type %d\n", - int13->drive, desc->bus_type ); - return -ENOTSUP; - } - - /* Get EDD block device description */ - if ( ( rc = edd_describe ( &int13->block, &dpi->interface_type, - &dpi->device_path ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x cannot identify block device: " - "%s\n", int13->drive, strerror ( rc ) ); - return rc; - } - - /* Fill in common fields and fix checksum */ - dpi->key = EDD_DEVICE_PATH_INFO_KEY; - dpi->len = sizeof ( *dpi ); - for ( i = 0 ; i < sizeof ( *dpi ) ; i++ ) - sum += *( ( ( uint8_t * ) dpi ) + i ); - dpi->checksum -= sum; - - return 0; -} - -/** - * INT 13, 48 - Get extended parameters - * - * @v int13 Emulated drive - * @v ds:si Drive parameter table - * @ret status Status code - */ -static int int13_get_extended_parameters ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - struct int13_disk_parameters params; - struct segoff address; - size_t len = sizeof ( params ); - uint16_t bufsize; - int rc; - - /* Get buffer size */ - get_real ( bufsize, ix86->segs.ds, - ( ix86->regs.si + offsetof ( typeof ( params ), bufsize ))); - - DBGC2 ( int13, "Get extended drive parameters to %04x:%04x+%02x\n", - ix86->segs.ds, ix86->regs.si, bufsize ); - - /* Build drive parameters */ - memset ( ¶ms, 0, sizeof ( params ) ); - params.flags = INT13_FL_DMA_TRANSPARENT; - if ( ( int13->cylinders < 1024 ) && - ( int13_capacity ( int13 ) <= INT13_MAX_CHS_SECTORS ) ) { - params.flags |= INT13_FL_CHS_VALID; - } - params.cylinders = int13->cylinders; - params.heads = int13->heads; - params.sectors_per_track = int13->sectors_per_track; - params.sectors = int13_capacity ( int13 ); - params.sector_size = int13_blksize ( int13 ); - memset ( ¶ms.dpte, 0xff, sizeof ( params.dpte ) ); - if ( ( rc = int13_device_path_info ( int13, ¶ms.dpi ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not provide device " - "path information: %s\n", - int13->drive, strerror ( rc ) ); - len = offsetof ( typeof ( params ), dpi ); - } - - /* Calculate returned "buffer size" (which will be less than - * the length actually copied if device path information is - * present). - */ - if ( bufsize < offsetof ( typeof ( params ), dpte ) ) - return -INT13_STATUS_INVALID; - if ( bufsize < offsetof ( typeof ( params ), dpi ) ) { - params.bufsize = offsetof ( typeof ( params ), dpte ); - } else { - params.bufsize = offsetof ( typeof ( params ), dpi ); - } - - DBGC ( int13, "INT 13 drive %02x described using extended " - "parameters:\n", int13->drive ); - address.segment = ix86->segs.ds; - address.offset = ix86->regs.si; - DBGC_HDA ( int13, address, ¶ms, len ); - - /* Return drive parameters */ - if ( len > bufsize ) - len = bufsize; - copy_to_real ( ix86->segs.ds, ix86->regs.si, ¶ms, len ); - - return 0; -} - -/** - * INT 13, 4b - Get status or terminate CD-ROM emulation - * - * @v int13 Emulated drive - * @v ds:si Specification packet - * @ret status Status code - */ -static int int13_cdrom_status_terminate ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - struct int13_cdrom_specification specification; - - DBGC2 ( int13, "Get CD-ROM emulation status to %04x:%04x%s\n", - ix86->segs.ds, ix86->regs.si, - ( ix86->regs.al ? "" : " and terminate" ) ); - - /* Fail if we are not a CD-ROM */ - if ( ! int13->is_cdrom ) { - DBGC ( int13, "INT13 drive %02x is not a CD-ROM\n", - int13->drive ); - return -INT13_STATUS_INVALID; - } - - /* Build specification packet */ - memset ( &specification, 0, sizeof ( specification ) ); - specification.size = sizeof ( specification ); - specification.drive = int13->drive; - - /* Return specification packet */ - copy_to_real ( ix86->segs.ds, ix86->regs.si, &specification, - sizeof ( specification ) ); - - return 0; -} - - -/** - * INT 13, 4d - Read CD-ROM boot catalog - * - * @v int13 Emulated drive - * @v ds:si Command packet - * @ret status Status code - */ -static int int13_cdrom_read_boot_catalog ( struct int13_drive *int13, - struct i386_all_regs *ix86 ) { - struct int13_cdrom_boot_catalog_command command; - int rc; - - /* Read parameters from command packet */ - copy_from_real ( &command, ix86->segs.ds, ix86->regs.si, - sizeof ( command ) ); - DBGC2 ( int13, "Read CD-ROM boot catalog to %08x\n", command.buffer ); - - /* Fail if we have no boot catalog */ - if ( ! int13->boot_catalog ) { - DBGC ( int13, "INT13 drive %02x has no boot catalog\n", - int13->drive ); - return -INT13_STATUS_INVALID; - } - - /* Read from boot catalog */ - if ( ( rc = int13_rw ( int13, ( int13->boot_catalog + command.start ), - command.count, phys_to_user ( command.buffer ), - block_read ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not read boot catalog: " - "%s\n", int13->drive, strerror ( rc ) ); - return -INT13_STATUS_READ_ERROR; - } - - return 0; -} - -/** - * INT 13 handler - * - */ -static __asmcall void int13 ( struct i386_all_regs *ix86 ) { - int command = ix86->regs.ah; - unsigned int bios_drive = ix86->regs.dl; - struct int13_drive *int13; - int status; - - /* Check BIOS hasn't killed off our drive */ - int13_check_num_drives(); - - list_for_each_entry ( int13, &int13s, list ) { - - if ( bios_drive != int13->drive ) { - /* Remap any accesses to this drive's natural number */ - if ( bios_drive == int13->natural_drive ) { - DBGC2 ( int13, "INT13,%02x (%02x) remapped to " - "(%02x)\n", ix86->regs.ah, - bios_drive, int13->drive ); - ix86->regs.dl = int13->drive; - return; - } else if ( ( ( bios_drive & 0x7f ) == 0x7f ) && - ( command == INT13_CDROM_STATUS_TERMINATE ) - && int13->is_cdrom ) { - /* Catch non-drive-specific CD-ROM calls */ - } else { - continue; - } - } - - DBGC2 ( int13, "INT13,%02x (%02x): ", - ix86->regs.ah, bios_drive ); - - switch ( command ) { - case INT13_RESET: - status = int13_reset ( int13, ix86 ); - break; - case INT13_GET_LAST_STATUS: - status = int13_get_last_status ( int13, ix86 ); - break; - case INT13_READ_SECTORS: - status = int13_read_sectors ( int13, ix86 ); - break; - case INT13_WRITE_SECTORS: - status = int13_write_sectors ( int13, ix86 ); - break; - case INT13_GET_PARAMETERS: - status = int13_get_parameters ( int13, ix86 ); - break; - case INT13_GET_DISK_TYPE: - status = int13_get_disk_type ( int13, ix86 ); - break; - case INT13_EXTENSION_CHECK: - status = int13_extension_check ( int13, ix86 ); - break; - case INT13_EXTENDED_READ: - status = int13_extended_read ( int13, ix86 ); - break; - case INT13_EXTENDED_WRITE: - status = int13_extended_write ( int13, ix86 ); - break; - case INT13_EXTENDED_VERIFY: - status = int13_extended_verify ( int13, ix86 ); - break; - case INT13_EXTENDED_SEEK: - status = int13_extended_seek ( int13, ix86 ); - break; - case INT13_GET_EXTENDED_PARAMETERS: - status = int13_get_extended_parameters ( int13, ix86 ); - break; - case INT13_CDROM_STATUS_TERMINATE: - status = int13_cdrom_status_terminate ( int13, ix86 ); - break; - case INT13_CDROM_READ_BOOT_CATALOG: - status = int13_cdrom_read_boot_catalog ( int13, ix86 ); - break; - default: - DBGC2 ( int13, "*** Unrecognised INT13 ***\n" ); - status = -INT13_STATUS_INVALID; - break; - } - - /* Store status for INT 13,01 */ - int13->last_status = status; - - /* Negative status indicates an error */ - if ( status < 0 ) { - status = -status; - DBGC ( int13, "INT13,%02x (%02x) failed with status " - "%02x\n", ix86->regs.ah, int13->drive, status ); - } else { - ix86->flags &= ~CF; - } - ix86->regs.ah = status; - - /* Set OF to indicate to wrapper not to chain this call */ - ix86->flags |= OF; - - return; - } -} - -/** - * Hook INT 13 handler - * - */ -static void int13_hook_vector ( void ) { - /* Assembly wrapper to call int13(). int13() sets OF if we - * should not chain to the previous handler. (The wrapper - * clears CF and OF before calling int13()). - */ - __asm__ __volatile__ ( - TEXT16_CODE ( "\nint13_wrapper:\n\t" - /* Preserve %ax and %dx for future reference */ - "pushw %%bp\n\t" - "movw %%sp, %%bp\n\t" - "pushw %%ax\n\t" - "pushw %%dx\n\t" - /* Clear OF, set CF, call int13() */ - "orb $0, %%al\n\t" - "stc\n\t" - "pushl %0\n\t" - "pushw %%cs\n\t" - "call prot_call\n\t" - /* Chain if OF not set */ - "jo 1f\n\t" - "pushfw\n\t" - "lcall *%%cs:int13_vector\n\t" - "\n1:\n\t" - /* Overwrite flags for iret */ - "pushfw\n\t" - "popw 6(%%bp)\n\t" - /* Fix up %dl: - * - * INT 13,15 : do nothing if hard disk - * INT 13,08 : load with number of drives - * all others: restore original value - */ - "cmpb $0x15, -1(%%bp)\n\t" - "jne 2f\n\t" - "testb $0x80, -4(%%bp)\n\t" - "jnz 3f\n\t" - "\n2:\n\t" - "movb -4(%%bp), %%dl\n\t" - "cmpb $0x08, -1(%%bp)\n\t" - "jne 3f\n\t" - "testb $0x80, %%dl\n\t" - "movb %%cs:num_drives, %%dl\n\t" - "jnz 3f\n\t" - "movb %%cs:num_fdds, %%dl\n\t" - /* Return */ - "\n3:\n\t" - "movw %%bp, %%sp\n\t" - "popw %%bp\n\t" - "iret\n\t" ) - : : "i" ( int13 ) ); - - hook_bios_interrupt ( 0x13, ( unsigned int ) int13_wrapper, - &int13_vector ); -} - -/** - * Unhook INT 13 handler - */ -static void int13_unhook_vector ( void ) { - unhook_bios_interrupt ( 0x13, ( unsigned int ) int13_wrapper, - &int13_vector ); -} - -/** - * Check INT13 emulated drive flow control window - * - * @v int13 Emulated drive - */ -static size_t int13_block_window ( struct int13_drive *int13 __unused ) { - - /* We are never ready to receive data via this interface. - * This prevents objects that support both block and stream - * interfaces from attempting to send us stream data. - */ - return 0; -} - -/** - * Handle INT 13 emulated drive underlying block device closing - * - * @v int13 Emulated drive - * @v rc Reason for close - */ -static void int13_block_close ( struct int13_drive *int13, int rc ) { - - /* Any closing is an error from our point of view */ - if ( rc == 0 ) - rc = -ENOTCONN; - - DBGC ( int13, "INT13 drive %02x went away: %s\n", - int13->drive, strerror ( rc ) ); - - /* Record block device error code */ - int13->block_rc = rc; - - /* Shut down interfaces */ - intf_restart ( &int13->block, rc ); -} - -/** INT 13 drive interface operations */ -static struct interface_operation int13_block_op[] = { - INTF_OP ( xfer_window, struct int13_drive *, int13_block_window ), - INTF_OP ( intf_close, struct int13_drive *, int13_block_close ), -}; - -/** INT 13 drive interface descriptor */ -static struct interface_descriptor int13_block_desc = - INTF_DESC ( struct int13_drive, block, int13_block_op ); - -/** - * Free INT 13 emulated drive - * - * @v refcnt Reference count - */ -static void int13_free ( struct refcnt *refcnt ) { - struct int13_drive *int13 = - container_of ( refcnt, struct int13_drive, refcnt ); - - uri_put ( int13->uri ); - free ( int13 ); -} - -/** - * Hook INT 13 emulated drive - * - * @v uri URI - * @v drive Drive number - * @ret rc Return status code - * - * Registers the drive with the INT 13 emulation subsystem, and hooks - * the INT 13 interrupt vector (if not already hooked). - */ -static int int13_hook ( struct uri *uri, unsigned int drive ) { - struct int13_drive *int13; - unsigned int natural_drive; - void *scratch; - int rc; - - /* Calculate natural drive number */ - int13_sync_num_drives(); - natural_drive = ( ( drive & 0x80 ) ? ( num_drives | 0x80 ) : num_fdds ); - - /* Check that drive number is not in use */ - list_for_each_entry ( int13, &int13s, list ) { - if ( int13->drive == drive ) { - rc = -EADDRINUSE; - goto err_in_use; - } - } - - /* Allocate and initialise structure */ - int13 = zalloc ( sizeof ( *int13 ) ); - if ( ! int13 ) { - rc = -ENOMEM; - goto err_zalloc; - } - ref_init ( &int13->refcnt, int13_free ); - intf_init ( &int13->block, &int13_block_desc, &int13->refcnt ); - int13->uri = uri_get ( uri ); - int13->drive = drive; - int13->natural_drive = natural_drive; - - /* Open block device interface */ - if ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) - goto err_reopen_block; - - /* Read device capacity */ - if ( ( rc = int13_read_capacity ( int13 ) ) != 0 ) - goto err_read_capacity; - - /* Allocate scratch area */ - scratch = malloc ( int13_blksize ( int13 ) ); - if ( ! scratch ) - goto err_alloc_scratch; - - /* Parse parameters, if present */ - if ( ( rc = int13_parse_iso9660 ( int13, scratch ) ) != 0 ) - goto err_parse_iso9660; - - /* Give drive a default geometry */ - if ( ( rc = int13_guess_geometry ( int13, scratch ) ) != 0 ) - goto err_guess_geometry; - - DBGC ( int13, "INT13 drive %02x (naturally %02x) registered with C/H/S " - "geometry %d/%d/%d\n", int13->drive, int13->natural_drive, - int13->cylinders, int13->heads, int13->sectors_per_track ); - - /* Hook INT 13 vector if not already hooked */ - if ( list_empty ( &int13s ) ) { - int13_hook_vector(); - devices_get(); - } - - /* Add to list of emulated drives */ - list_add ( &int13->list, &int13s ); - - /* Update BIOS drive count */ - int13_sync_num_drives(); - - free ( scratch ); - return 0; - - err_guess_geometry: - err_parse_iso9660: - free ( scratch ); - err_alloc_scratch: - err_read_capacity: - err_reopen_block: - intf_shutdown ( &int13->block, rc ); - ref_put ( &int13->refcnt ); - err_zalloc: - err_in_use: - return rc; -} - -/** - * Find INT 13 emulated drive by drive number - * - * @v drive Drive number - * @ret int13 Emulated drive, or NULL - */ -static struct int13_drive * int13_find ( unsigned int drive ) { - struct int13_drive *int13; - - list_for_each_entry ( int13, &int13s, list ) { - if ( int13->drive == drive ) - return int13; - } - return NULL; -} - -/** - * Unhook INT 13 emulated drive - * - * @v drive Drive number - * - * Unregisters the drive from the INT 13 emulation subsystem. If this - * is the last emulated drive, the INT 13 vector is unhooked (if - * possible). - */ -static void int13_unhook ( unsigned int drive ) { - struct int13_drive *int13; - - /* Find drive */ - int13 = int13_find ( drive ); - if ( ! int13 ) { - DBG ( "INT13 cannot find emulated drive %02x\n", drive ); - return; - } - - /* Shut down interfaces */ - intf_shutdown ( &int13->block, 0 ); - - /* Remove from list of emulated drives */ - list_del ( &int13->list ); - - /* Should adjust BIOS drive count, but it's difficult - * to do so reliably. - */ - - DBGC ( int13, "INT13 drive %02x unregistered\n", int13->drive ); - - /* Unhook INT 13 vector if no more drives */ - if ( list_empty ( &int13s ) ) { - devices_put(); - int13_unhook_vector(); - } - - /* Drop list's reference to drive */ - ref_put ( &int13->refcnt ); -} - -/** - * Load and verify master boot record from INT 13 drive - * - * @v drive Drive number - * @v address Boot code address to fill in - * @ret rc Return status code - */ -static int int13_load_mbr ( unsigned int drive, struct segoff *address ) { - uint8_t status; - int discard_b, discard_c, discard_d; - uint16_t magic; - - /* Use INT 13, 02 to read the MBR */ - address->segment = 0; - address->offset = 0x7c00; - __asm__ __volatile__ ( REAL_CODE ( "pushw %%es\n\t" - "pushl %%ebx\n\t" - "popw %%bx\n\t" - "popw %%es\n\t" - "stc\n\t" - "sti\n\t" - "int $0x13\n\t" - "sti\n\t" /* BIOS bugs */ - "jc 1f\n\t" - "xorw %%ax, %%ax\n\t" - "\n1:\n\t" - "popw %%es\n\t" ) - : "=a" ( status ), "=b" ( discard_b ), - "=c" ( discard_c ), "=d" ( discard_d ) - : "a" ( 0x0201 ), "b" ( *address ), - "c" ( 1 ), "d" ( drive ) ); - if ( status ) { - DBG ( "INT13 drive %02x could not read MBR (status %02x)\n", - drive, status ); - return -EIO; - } - - /* Check magic signature */ - get_real ( magic, address->segment, - ( address->offset + - offsetof ( struct master_boot_record, magic ) ) ); - if ( magic != INT13_MBR_MAGIC ) { - DBG ( "INT13 drive %02x does not contain a valid MBR\n", - drive ); - return -ENOEXEC; - } - - return 0; -} - -/** El Torito boot catalog command packet */ -static struct int13_cdrom_boot_catalog_command __data16 ( eltorito_cmd ) = { - .size = sizeof ( struct int13_cdrom_boot_catalog_command ), - .count = 1, - .buffer = 0x7c00, - .start = 0, -}; -#define eltorito_cmd __use_data16 ( eltorito_cmd ) - -/** El Torito disk address packet */ -static struct int13_disk_address __bss16 ( eltorito_address ); -#define eltorito_address __use_data16 ( eltorito_address ) - -/** - * Load and verify El Torito boot record from INT 13 drive - * - * @v drive Drive number - * @v address Boot code address to fill in - * @ret rc Return status code - */ -static int int13_load_eltorito ( unsigned int drive, struct segoff *address ) { - struct { - struct eltorito_validation_entry valid; - struct eltorito_boot_entry boot; - } __attribute__ (( packed )) catalog; - uint8_t status; - - /* Use INT 13, 4d to read the boot catalog */ - __asm__ __volatile__ ( REAL_CODE ( "stc\n\t" - "sti\n\t" - "int $0x13\n\t" - "sti\n\t" /* BIOS bugs */ - "jc 1f\n\t" - "xorw %%ax, %%ax\n\t" - "\n1:\n\t" ) - : "=a" ( status ) - : "a" ( 0x4d00 ), "d" ( drive ), - "S" ( __from_data16 ( &eltorito_cmd ) ) ); - if ( status ) { - DBG ( "INT13 drive %02x could not read El Torito boot catalog " - "(status %02x)\n", drive, status ); - return -EIO; - } - copy_from_user ( &catalog, phys_to_user ( eltorito_cmd.buffer ), 0, - sizeof ( catalog ) ); - - /* Sanity checks */ - if ( catalog.valid.platform_id != ELTORITO_PLATFORM_X86 ) { - DBG ( "INT13 drive %02x El Torito specifies unknown platform " - "%02x\n", drive, catalog.valid.platform_id ); - return -ENOEXEC; - } - if ( catalog.boot.indicator != ELTORITO_BOOTABLE ) { - DBG ( "INT13 drive %02x El Torito is not bootable\n", drive ); - return -ENOEXEC; - } - if ( catalog.boot.media_type != ELTORITO_NO_EMULATION ) { - DBG ( "INT13 drive %02x El Torito requires emulation " - "type %02x\n", drive, catalog.boot.media_type ); - return -ENOTSUP; - } - DBG ( "INT13 drive %02x El Torito boot image at LBA %08x (count %d)\n", - drive, catalog.boot.start, catalog.boot.length ); - address->segment = ( catalog.boot.load_segment ? - catalog.boot.load_segment : 0x7c0 ); - address->offset = 0; - DBG ( "INT13 drive %02x El Torito boot image loads at %04x:%04x\n", - drive, address->segment, address->offset ); - - /* Use INT 13, 42 to read the boot image */ - eltorito_address.bufsize = - offsetof ( typeof ( eltorito_address ), buffer_phys ); - eltorito_address.count = catalog.boot.length; - eltorito_address.buffer = *address; - eltorito_address.lba = catalog.boot.start; - __asm__ __volatile__ ( REAL_CODE ( "stc\n\t" - "sti\n\t" - "int $0x13\n\t" - "sti\n\t" /* BIOS bugs */ - "jc 1f\n\t" - "xorw %%ax, %%ax\n\t" - "\n1:\n\t" ) - : "=a" ( status ) - : "a" ( 0x4200 ), "d" ( drive ), - "S" ( __from_data16 ( &eltorito_address ) ) ); - if ( status ) { - DBG ( "INT13 drive %02x could not read El Torito boot image " - "(status %02x)\n", drive, status ); - return -EIO; - } - - return 0; -} - -/** - * Attempt to boot from an INT 13 drive - * - * @v drive Drive number - * @ret rc Return status code - * - * This boots from the specified INT 13 drive by loading the Master - * Boot Record to 0000:7c00 and jumping to it. INT 18 is hooked to - * capture an attempt by the MBR to boot the next device. (This is - * the closest thing to a return path from an MBR). - * - * Note that this function can never return success, by definition. - */ -static int int13_boot ( unsigned int drive ) { - struct memory_map memmap; - struct segoff address; - int rc; - - /* Look for a usable boot sector */ - if ( ( ( rc = int13_load_mbr ( drive, &address ) ) != 0 ) && - ( ( rc = int13_load_eltorito ( drive, &address ) ) != 0 ) ) - return rc; - - /* Dump out memory map prior to boot, if memmap debugging is - * enabled. Not required for program flow, but we have so - * many problems that turn out to be memory-map related that - * it's worth doing. - */ - get_memmap ( &memmap ); - - /* Jump to boot sector */ - if ( ( rc = call_bootsector ( address.segment, address.offset, - drive ) ) != 0 ) { - DBG ( "INT13 drive %02x boot returned: %s\n", - drive, strerror ( rc ) ); - return rc; - } - - return -ECANCELED; /* -EIMPOSSIBLE */ -} - -/** A boot firmware table generated by iPXE */ -union xbft_table { - /** ACPI header */ - struct acpi_description_header acpi; - /** Padding */ - char pad[768]; -}; - -/** The boot firmware table generated by iPXE */ -static union xbft_table __bss16 ( xbftab ) __attribute__ (( aligned ( 16 ) )); -#define xbftab __use_data16 ( xbftab ) - -/** - * Describe INT 13 emulated drive for SAN-booted operating system - * - * @v drive Drive number - * @ret rc Return status code - */ -static int int13_describe ( unsigned int drive ) { - struct int13_drive *int13; - struct segoff xbft_address; - int rc; - - /* Find drive */ - int13 = int13_find ( drive ); - if ( ! int13 ) { - DBG ( "INT13 cannot find emulated drive %02x\n", drive ); - return -ENODEV; - } - - /* Reopen block device if necessary */ - if ( ( int13->block_rc != 0 ) && - ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) ) - return rc; - - /* Clear table */ - memset ( &xbftab, 0, sizeof ( xbftab ) ); - - /* Fill in common parameters */ - strncpy ( xbftab.acpi.oem_id, "FENSYS", - sizeof ( xbftab.acpi.oem_id ) ); - strncpy ( xbftab.acpi.oem_table_id, "iPXE", - sizeof ( xbftab.acpi.oem_table_id ) ); - - /* Fill in remaining parameters */ - if ( ( rc = acpi_describe ( &int13->block, &xbftab.acpi, - sizeof ( xbftab ) ) ) != 0 ) { - DBGC ( int13, "INT13 drive %02x could not create ACPI " - "description: %s\n", int13->drive, strerror ( rc ) ); - return rc; - } - - /* Fix up ACPI checksum */ - acpi_fix_checksum ( &xbftab.acpi ); - xbft_address.segment = rm_ds; - xbft_address.offset = __from_data16 ( &xbftab ); - DBGC ( int13, "INT13 drive %02x described using boot firmware " - "table:\n", int13->drive ); - DBGC_HDA ( int13, xbft_address, &xbftab, - le32_to_cpu ( xbftab.acpi.length ) ); - - return 0; -} - -PROVIDE_SANBOOT_INLINE ( pcbios, san_default_drive ); -PROVIDE_SANBOOT ( pcbios, san_hook, int13_hook ); -PROVIDE_SANBOOT ( pcbios, san_unhook, int13_unhook ); -PROVIDE_SANBOOT ( pcbios, san_boot, int13_boot ); -PROVIDE_SANBOOT ( pcbios, san_describe, int13_describe ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13con.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13con.c deleted file mode 100644 index 2414c6909..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/int13con.c +++ /dev/null @@ -1,284 +0,0 @@ -/* - * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <string.h> -#include <errno.h> -#include <ipxe/console.h> -#include <ipxe/init.h> -#include <realmode.h> -#include <int13.h> -#include <config/console.h> - -/** @file - * - * INT13 disk log console - * - */ - -/* Set default console usage if applicable */ -#if ! ( defined ( CONSOLE_INT13 ) && CONSOLE_EXPLICIT ( CONSOLE_INT13 ) ) -#undef CONSOLE_INT13 -#define CONSOLE_INT13 ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG ) -#endif - -/** Disk drive number */ -#define INT13CON_DRIVE 0x80 - -/** Log partition type */ -#define INT13CON_PARTITION_TYPE 0xe0 - -/** Maximum number of outstanding unwritten characters */ -#define INT13CON_MAX_UNWRITTEN 64 - -/** Log partition header */ -struct int13con_header { - /** Magic signature */ - char magic[10]; -} __attribute__ (( packed )); - -/** Log partition magic signature */ -#define INT13CON_MAGIC "iPXE LOG\n\n" - -/** Sector buffer */ -static uint8_t __bss16_array ( int13con_buffer, [INT13_BLKSIZE] ); -#define int13con_buffer __use_data16 ( int13con_buffer ) - -/** Disk address packet */ -static struct int13_disk_address __bss16 ( int13con_address ); -#define int13con_address __use_data16 ( int13con_address ) - -/** Current LBA */ -static uint64_t int13con_lba; - -/** Maximum LBA */ -static uint64_t int13con_max_lba; - -/** Current offset within sector */ -static size_t int13con_offset; - -/** Number of unwritten characters */ -static size_t int13con_unwritten; - -struct console_driver int13con __console_driver; - -/** - * Read/write disk sector - * - * @v op Operation - * @v lba Logical block address - * @ret rc Return status code - */ -static int int13con_rw ( unsigned int op, uint64_t lba ) { - uint8_t error; - - /* Construct disk address packet */ - int13con_address.bufsize = sizeof ( int13con_address ); - int13con_address.count = 1; - int13con_address.buffer.segment = rm_ds; - int13con_address.buffer.offset = __from_data16 ( int13con_buffer ); - int13con_address.lba = lba; - - /* Issue INT13 */ - __asm__ ( REAL_CODE ( "int $0x13\n\t" ) - : "=a" ( error ) - : "0" ( op << 8 ), "d" ( INT13CON_DRIVE ), - "S" ( __from_data16 ( &int13con_address ) ) ); - if ( error ) { - DBG ( "INT13CON operation %04x failed: %02x\n", - op, error ); - return -EIO; - } - - return 0; -} - -/** - * Write character to console - * - * @v character Character - */ -static void int13con_putchar ( int character ) { - static int busy; - int rc; - - /* Ignore if we are already mid-logging */ - if ( busy ) - return; - busy = 1; - - /* Write character to buffer */ - int13con_buffer[int13con_offset++] = character; - int13con_unwritten++; - - /* Write sector to disk, if applicable */ - if ( ( int13con_offset == INT13_BLKSIZE ) || - ( int13con_unwritten == INT13CON_MAX_UNWRITTEN ) || - ( character == '\n' ) ) { - - /* Write sector to disk */ - if ( ( rc = int13con_rw ( INT13_EXTENDED_WRITE, - int13con_lba ) ) != 0 ) { - DBG ( "INT13CON could not write log\n" ); - /* Ignore and continue; there's nothing we can do */ - } - - /* Reset count of unwritten characters */ - int13con_unwritten = 0; - } - - /* Move to next sector, if applicable */ - if ( int13con_offset == INT13_BLKSIZE ) { - - /* Disable console if we have run out of space */ - if ( int13con_lba >= int13con_max_lba ) - int13con.disabled = 1; - - /* Clear log buffer */ - memset ( int13con_buffer, 0, sizeof ( int13con_buffer ) ); - int13con_offset = 0; - - /* Move to next sector */ - int13con_lba++; - } - - /* Clear busy flag */ - busy = 0; -} - -/** - * Find log partition - * - * @ret rc Return status code - */ -static int int13con_find ( void ) { - struct master_boot_record *mbr = - ( ( struct master_boot_record * ) int13con_buffer ); - struct int13con_header *hdr = - ( ( struct int13con_header * ) int13con_buffer ); - struct partition_table_entry part[4]; - unsigned int i; - int rc; - - /* Read MBR */ - if ( ( rc = int13con_rw ( INT13_EXTENDED_READ, 0 ) ) != 0 ) { - DBG ( "INT13CON could not read MBR: %s\n", strerror ( rc ) ); - return rc; - } - - /* Check MBR magic */ - if ( mbr->magic != INT13_MBR_MAGIC ) { - DBG ( "INT13CON incorrect MBR magic\n" ); - DBG2_HDA ( 0, mbr, sizeof ( *mbr ) ); - return -EINVAL; - } - - /* Look for magic partition */ - memcpy ( part, mbr->partitions, sizeof ( part ) ); - for ( i = 0 ; i < ( sizeof ( part ) / sizeof ( part[0] ) ) ; i++ ) { - - /* Skip partitions of the wrong type */ - if ( part[i].type != INT13CON_PARTITION_TYPE ) - continue; - - /* Read partition header */ - if ( ( rc = int13con_rw ( INT13_EXTENDED_READ, - part[i].start ) ) != 0 ) { - DBG ( "INT13CON partition %d could not read header: " - "%s\n", ( i + 1 ), strerror ( rc ) ); - continue; - } - - /* Check partition header */ - if ( memcmp ( hdr->magic, INT13CON_MAGIC, - sizeof ( hdr->magic ) ) != 0 ) { - DBG ( "INT13CON partition %d bad magic\n", ( i + 1 ) ); - DBG2_HDA ( 0, hdr, sizeof ( *hdr ) ); - continue; - } - - /* Found log partition */ - DBG ( "INT13CON partition %d at [%08x,%08x)\n", ( i + 1 ), - part[i].start, ( part[i].start + part[i].length ) ); - int13con_lba = part[i].start; - int13con_max_lba = ( part[i].start + part[i].length - 1 ); - - /* Initialise log buffer */ - memset ( &int13con_buffer[ sizeof ( *hdr ) ], 0, - ( sizeof ( int13con_buffer ) - sizeof ( *hdr ) ) ); - int13con_offset = sizeof ( hdr->magic ); - - return 0; - } - - DBG ( "INT13CON found no log partition\n" ); - return -ENOENT; -} - -/** - * Initialise INT13 console - * - */ -static void int13con_init ( void ) { - uint8_t error; - uint16_t check; - unsigned int discard_c; - unsigned int discard_d; - int rc; - - /* Check for INT13 extensions */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x13\n\t" - "setc %%al\n\t" ) - : "=a" ( error ), "=b" ( check ), - "=c" ( discard_c ), "=d" ( discard_d ) - : "0" ( INT13_EXTENSION_CHECK << 8 ), - "1" ( 0x55aa ), "3" ( INT13CON_DRIVE ) ); - if ( error || ( check != 0xaa55 ) ) { - DBG ( "INT13CON missing extensions (%02x,%04x)\n", - error, check ); - return; - } - - /* Locate log partition */ - if ( ( rc = int13con_find() ) != 0) - return; - - /* Enable console */ - int13con.disabled = 0; -} - -/** - * INT13 console initialisation function - */ -struct init_fn int13con_init_fn __init_fn ( INIT_CONSOLE ) = { - .initialise = int13con_init, -}; - -/** INT13 console driver */ -struct console_driver int13con __console_driver = { - .putchar = int13con_putchar, - .disabled = CONSOLE_DISABLED, - .usage = CONSOLE_INT13, -}; diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/memtop_umalloc.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/memtop_umalloc.c deleted file mode 100644 index 957f8e324..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/memtop_umalloc.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** - * @file - * - * External memory allocation - * - */ - -#include <limits.h> -#include <errno.h> -#include <ipxe/uaccess.h> -#include <ipxe/hidemem.h> -#include <ipxe/io.h> -#include <ipxe/memblock.h> -#include <ipxe/umalloc.h> - -/** Alignment of external allocated memory */ -#define EM_ALIGN ( 4 * 1024 ) - -/** Equivalent of NOWHERE for user pointers */ -#define UNOWHERE ( ~UNULL ) - -/** An external memory block */ -struct external_memory { - /** Size of this memory block (excluding this header) */ - size_t size; - /** Block is currently in use */ - int used; -}; - -/** Top of heap */ -static userptr_t top = UNULL; - -/** Bottom of heap (current lowest allocated block) */ -static userptr_t bottom = UNULL; - -/** Remaining space on heap */ -static size_t heap_size; - -/** - * Initialise external heap - * - */ -static void init_eheap ( void ) { - userptr_t base; - - heap_size = largest_memblock ( &base ); - bottom = top = userptr_add ( base, heap_size ); - DBG ( "External heap grows downwards from %lx (size %zx)\n", - user_to_phys ( top, 0 ), heap_size ); -} - -/** - * Collect free blocks - * - */ -static void ecollect_free ( void ) { - struct external_memory extmem; - size_t len; - - /* Walk the free list and collect empty blocks */ - while ( bottom != top ) { - copy_from_user ( &extmem, bottom, -sizeof ( extmem ), - sizeof ( extmem ) ); - if ( extmem.used ) - break; - DBG ( "EXTMEM freeing [%lx,%lx)\n", user_to_phys ( bottom, 0 ), - user_to_phys ( bottom, extmem.size ) ); - len = ( extmem.size + sizeof ( extmem ) ); - bottom = userptr_add ( bottom, len ); - heap_size += len; - } -} - -/** - * Reallocate external memory - * - * @v old_ptr Memory previously allocated by umalloc(), or UNULL - * @v new_size Requested size - * @ret new_ptr Allocated memory, or UNULL - * - * Calling realloc() with a new size of zero is a valid way to free a - * memory block. - */ -static userptr_t memtop_urealloc ( userptr_t ptr, size_t new_size ) { - struct external_memory extmem; - userptr_t new = ptr; - size_t align; - - /* (Re)initialise external memory allocator if necessary */ - if ( bottom == top ) - init_eheap(); - - /* Get block properties into extmem */ - if ( ptr && ( ptr != UNOWHERE ) ) { - /* Determine old size */ - copy_from_user ( &extmem, ptr, -sizeof ( extmem ), - sizeof ( extmem ) ); - } else { - /* Create a zero-length block */ - if ( heap_size < sizeof ( extmem ) ) { - DBG ( "EXTMEM out of space\n" ); - return UNULL; - } - ptr = bottom = userptr_add ( bottom, -sizeof ( extmem ) ); - heap_size -= sizeof ( extmem ); - DBG ( "EXTMEM allocating [%lx,%lx)\n", - user_to_phys ( ptr, 0 ), user_to_phys ( ptr, 0 ) ); - extmem.size = 0; - } - extmem.used = ( new_size > 0 ); - - /* Expand/shrink block if possible */ - if ( ptr == bottom ) { - /* Update block */ - if ( new_size > ( heap_size - extmem.size ) ) { - DBG ( "EXTMEM out of space\n" ); - return UNULL; - } - new = userptr_add ( ptr, - ( new_size - extmem.size ) ); - align = ( user_to_phys ( new, 0 ) & ( EM_ALIGN - 1 ) ); - new_size += align; - new = userptr_add ( new, -align ); - DBG ( "EXTMEM expanding [%lx,%lx) to [%lx,%lx)\n", - user_to_phys ( ptr, 0 ), - user_to_phys ( ptr, extmem.size ), - user_to_phys ( new, 0 ), - user_to_phys ( new, new_size )); - memmove_user ( new, 0, ptr, 0, ( ( extmem.size < new_size ) ? - extmem.size : new_size ) ); - bottom = new; - heap_size -= ( new_size - extmem.size ); - extmem.size = new_size; - } else { - /* Cannot expand; can only pretend to shrink */ - if ( new_size > extmem.size ) { - /* Refuse to expand */ - DBG ( "EXTMEM cannot expand [%lx,%lx)\n", - user_to_phys ( ptr, 0 ), - user_to_phys ( ptr, extmem.size ) ); - return UNULL; - } - } - - /* Write back block properties */ - copy_to_user ( new, -sizeof ( extmem ), &extmem, - sizeof ( extmem ) ); - - /* Collect any free blocks and update hidden memory region */ - ecollect_free(); - hide_umalloc ( user_to_phys ( bottom, ( ( bottom == top ) ? - 0 : -sizeof ( extmem ) ) ), - user_to_phys ( top, 0 ) ); - - return ( new_size ? new : UNOWHERE ); -} - -PROVIDE_UMALLOC ( memtop, urealloc, memtop_urealloc ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/pcibios.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/pcibios.c deleted file mode 100644 index 34efa0b39..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/pcibios.c +++ /dev/null @@ -1,123 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -#include <stdint.h> -#include <ipxe/pci.h> -#include <realmode.h> - -/** @file - * - * PCI configuration space access via PCI BIOS - * - */ - -/** - * Determine number of PCI buses within system - * - * @ret num_bus Number of buses - */ -static int pcibios_num_bus ( void ) { - int discard_a, discard_D; - uint8_t max_bus; - - /* We issue this call using flat real mode, to work around a - * bug in some HP BIOSes. - */ - __asm__ __volatile__ ( REAL_CODE ( "call flatten_real_mode\n\t" - "stc\n\t" - "int $0x1a\n\t" - "jnc 1f\n\t" - "xorw %%cx, %%cx\n\t" - "\n1:\n\t" ) - : "=c" ( max_bus ), "=a" ( discard_a ), - "=D" ( discard_D ) - : "a" ( PCIBIOS_INSTALLATION_CHECK >> 16 ), - "D" ( 0 ) - : "ebx", "edx" ); - - return ( max_bus + 1 ); -} - -/** - * Read configuration space via PCI BIOS - * - * @v pci PCI device - * @v command PCI BIOS command - * @v value Value read - * @ret rc Return status code - */ -int pcibios_read ( struct pci_device *pci, uint32_t command, uint32_t *value ){ - int discard_b, discard_D; - int status; - - __asm__ __volatile__ ( REAL_CODE ( "stc\n\t" - "int $0x1a\n\t" - "jnc 1f\n\t" - "xorl %%eax, %%eax\n\t" - "decl %%eax\n\t" - "movl %%eax, %%ecx\n\t" - "\n1:\n\t" ) - : "=a" ( status ), "=b" ( discard_b ), - "=c" ( *value ), "=D" ( discard_D ) - : "a" ( command >> 16 ), "D" ( command ), - "b" ( pci->busdevfn ) - : "edx" ); - - return ( ( status >> 8 ) & 0xff ); -} - -/** - * Write configuration space via PCI BIOS - * - * @v pci PCI device - * @v command PCI BIOS command - * @v value Value to be written - * @ret rc Return status code - */ -int pcibios_write ( struct pci_device *pci, uint32_t command, uint32_t value ){ - int discard_b, discard_c, discard_D; - int status; - - __asm__ __volatile__ ( REAL_CODE ( "stc\n\t" - "int $0x1a\n\t" - "jnc 1f\n\t" - "movb $0xff, %%ah\n\t" - "\n1:\n\t" ) - : "=a" ( status ), "=b" ( discard_b ), - "=c" ( discard_c ), "=D" ( discard_D ) - : "a" ( command >> 16 ), "D" ( command ), - "b" ( pci->busdevfn ), "c" ( value ) - : "edx" ); - - return ( ( status >> 8 ) & 0xff ); -} - -PROVIDE_PCIAPI ( pcbios, pci_num_bus, pcibios_num_bus ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_read_config_byte ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_read_config_word ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_read_config_dword ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_write_config_byte ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_write_config_word ); -PROVIDE_PCIAPI_INLINE ( pcbios, pci_write_config_dword ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_entropy.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_entropy.c deleted file mode 100644 index 9aab03c03..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_entropy.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * RTC-based entropy source - * - */ - -#include <stdint.h> -#include <string.h> -#include <biosint.h> -#include <pic8259.h> -#include <rtc.h> -#include <ipxe/entropy.h> - -/** RTC "interrupt triggered" flag */ -static uint8_t __text16 ( rtc_flag ); -#define rtc_flag __use_text16 ( rtc_flag ) - -/** RTC interrupt handler */ -extern void rtc_isr ( void ); - -/** Previous RTC interrupt handler */ -static struct segoff rtc_old_handler; - -/** - * Hook RTC interrupt handler - * - */ -static void rtc_hook_isr ( void ) { - - /* RTC interrupt handler */ - __asm__ __volatile__ ( - TEXT16_CODE ( "\nrtc_isr:\n\t" - /* Preserve registers */ - "pushw %%ax\n\t" - /* Set "interrupt triggered" flag */ - "cs movb $0x01, %c0\n\t" - /* Read RTC status register C to - * acknowledge interrupt - */ - "movb %3, %%al\n\t" - "outb %%al, %1\n\t" - "inb %2\n\t" - /* Send EOI */ - "movb $0x20, %%al\n\t" - "outb %%al, $0xa0\n\t" - "outb %%al, $0x20\n\t" - /* Restore registers and return */ - "popw %%ax\n\t" - "iret\n\t" ) - : - : "p" ( __from_text16 ( &rtc_flag ) ), - "i" ( CMOS_ADDRESS ), "i" ( CMOS_DATA ), - "i" ( RTC_STATUS_C ) ); - - hook_bios_interrupt ( RTC_INT, ( unsigned int ) rtc_isr, - &rtc_old_handler ); -} - -/** - * Unhook RTC interrupt handler - * - */ -static void rtc_unhook_isr ( void ) { - int rc; - - rc = unhook_bios_interrupt ( RTC_INT, ( unsigned int ) rtc_isr, - &rtc_old_handler ); - assert ( rc == 0 ); /* Should always be able to unhook */ -} - -/** - * Enable RTC interrupts - * - */ -static void rtc_enable_int ( void ) { - uint8_t status_b; - - /* Set Periodic Interrupt Enable bit in status register B */ - outb ( ( RTC_STATUS_B | CMOS_DISABLE_NMI ), CMOS_ADDRESS ); - status_b = inb ( CMOS_DATA ); - outb ( ( RTC_STATUS_B | CMOS_DISABLE_NMI ), CMOS_ADDRESS ); - outb ( ( status_b | RTC_STATUS_B_PIE ), CMOS_DATA ); - - /* Re-enable NMI and reset to default address */ - outb ( CMOS_DEFAULT_ADDRESS, CMOS_ADDRESS ); - inb ( CMOS_DATA ); /* Discard; may be needed on some platforms */ -} - -/** - * Disable RTC interrupts - * - */ -static void rtc_disable_int ( void ) { - uint8_t status_b; - - /* Clear Periodic Interrupt Enable bit in status register B */ - outb ( ( RTC_STATUS_B | CMOS_DISABLE_NMI ), CMOS_ADDRESS ); - status_b = inb ( CMOS_DATA ); - outb ( ( RTC_STATUS_B | CMOS_DISABLE_NMI ), CMOS_ADDRESS ); - outb ( ( status_b & ~RTC_STATUS_B_PIE ), CMOS_DATA ); - - /* Re-enable NMI and reset to default address */ - outb ( CMOS_DEFAULT_ADDRESS, CMOS_ADDRESS ); - inb ( CMOS_DATA ); /* Discard; may be needed on some platforms */ -} - -/** - * Enable entropy gathering - * - * @ret rc Return status code - */ -static int rtc_entropy_enable ( void ) { - - rtc_hook_isr(); - enable_irq ( RTC_IRQ ); - rtc_enable_int(); - - return 0; -} - -/** - * Disable entropy gathering - * - */ -static void rtc_entropy_disable ( void ) { - - rtc_disable_int(); - disable_irq ( RTC_IRQ ); - rtc_unhook_isr(); -} - -/** - * Measure a single RTC tick - * - * @ret delta Length of RTC tick (in TSC units) - */ -uint8_t rtc_sample ( void ) { - uint32_t before; - uint32_t after; - uint32_t temp; - - __asm__ __volatile__ ( - REAL_CODE ( /* Enable interrupts */ - "sti\n\t" - /* Wait for RTC interrupt */ - "cs movb %b2, %c4\n\t" - "\n1:\n\t" - "cs xchgb %b2, %c4\n\t" /* Serialize */ - "testb %b2, %b2\n\t" - "jz 1b\n\t" - /* Read "before" TSC */ - "rdtsc\n\t" - /* Store "before" TSC on stack */ - "pushl %0\n\t" - /* Wait for another RTC interrupt */ - "xorb %b2, %b2\n\t" - "cs movb %b2, %c4\n\t" - "\n1:\n\t" - "cs xchgb %b2, %c4\n\t" /* Serialize */ - "testb %b2, %b2\n\t" - "jz 1b\n\t" - /* Read "after" TSC */ - "rdtsc\n\t" - /* Retrieve "before" TSC on stack */ - "popl %1\n\t" - /* Disable interrupts */ - "cli\n\t" - ) - : "=a" ( after ), "=d" ( before ), "=q" ( temp ) - : "2" ( 0 ), "p" ( __from_text16 ( &rtc_flag ) ) ); - - return ( after - before ); -} - -PROVIDE_ENTROPY_INLINE ( rtc, min_entropy_per_sample ); -PROVIDE_ENTROPY ( rtc, entropy_enable, rtc_entropy_enable ); -PROVIDE_ENTROPY ( rtc, entropy_disable, rtc_entropy_disable ); -PROVIDE_ENTROPY_INLINE ( rtc, get_noise ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_time.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_time.c deleted file mode 100644 index cdbeac8d5..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/rtc_time.c +++ /dev/null @@ -1,142 +0,0 @@ -/* - * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * RTC-based time source - * - */ - -#include <stdint.h> -#include <time.h> -#include <rtc.h> -#include <ipxe/time.h> - -/** - * Read RTC register - * - * @v address Register address - * @ret data Data - */ -static unsigned int rtc_readb ( int address ) { - outb ( address, CMOS_ADDRESS ); - return inb ( CMOS_DATA ); -} - -/** - * Check if RTC update is in progress - * - * @ret is_busy RTC update is in progress - */ -static int rtc_is_busy ( void ) { - return ( rtc_readb ( RTC_STATUS_A ) & RTC_STATUS_A_UPDATE_IN_PROGRESS ); -} - -/** - * Read RTC BCD register - * - * @v address Register address - * @ret value Value - */ -static unsigned int rtc_readb_bcd ( int address ) { - unsigned int bcd; - - bcd = rtc_readb ( address ); - return ( bcd - ( 6 * ( bcd >> 4 ) ) ); -} - -/** - * Read RTC time - * - * @ret time Time, in seconds - */ -static time_t rtc_read_time ( void ) { - unsigned int status_b; - int is_binary; - int is_24hour; - unsigned int ( * read_component ) ( int address ); - struct tm tm; - int is_pm; - unsigned int hour; - time_t time; - - /* Wait for any in-progress update to complete */ - while ( rtc_is_busy() ) {} - - /* Determine RTC mode */ - status_b = rtc_readb ( RTC_STATUS_B ); - is_binary = ( status_b & RTC_STATUS_B_BINARY ); - is_24hour = ( status_b & RTC_STATUS_B_24_HOUR ); - read_component = ( is_binary ? rtc_readb : rtc_readb_bcd ); - - /* Read time values */ - tm.tm_sec = read_component ( RTC_SEC ); - tm.tm_min = read_component ( RTC_MIN ); - hour = read_component ( RTC_HOUR ); - if ( ! is_24hour ) { - is_pm = ( hour >= 80 ); - hour = ( ( ( ( hour & 0x7f ) % 80 ) % 12 ) + - ( is_pm ? 12 : 0 ) ); - } - tm.tm_hour = hour; - tm.tm_mday = read_component ( RTC_MDAY ); - tm.tm_mon = ( read_component ( RTC_MON ) - 1 ); - tm.tm_year = ( read_component ( RTC_YEAR ) + - 100 /* Assume we are in the 21st century, since - * this code was written in 2012 */ ); - - DBGC ( RTC_STATUS_A, "RTCTIME is %04d-%02d-%02d %02d:%02d:%02d " - "(%s,%d-hour)\n", ( tm.tm_year + 1900 ), ( tm.tm_mon + 1 ), - tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, - ( is_binary ? "binary" : "BCD" ), ( is_24hour ? 24 : 12 ) ); - - /* Convert to seconds since the Epoch */ - time = mktime ( &tm ); - - return time; -} - -/** - * Get current time in seconds - * - * @ret time Time, in seconds - */ -static time_t rtc_now ( void ) { - time_t time = 0; - time_t last_time; - - /* Read time until we get two matching values in a row, in - * case we end up reading a corrupted value in the middle of - * an update. - */ - do { - last_time = time; - time = rtc_read_time(); - } while ( time != last_time ); - - return time; -} - -PROVIDE_TIME ( rtc, time_now, rtc_now ); diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/vesafb.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/vesafb.c deleted file mode 100644 index 9cf2bf29e..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/vesafb.c +++ /dev/null @@ -1,542 +0,0 @@ -/* - * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * VESA frame buffer console - * - */ - -#include <stdlib.h> -#include <errno.h> -#include <limits.h> -#include <realmode.h> -#include <ipxe/console.h> -#include <ipxe/io.h> -#include <ipxe/ansicol.h> -#include <ipxe/fbcon.h> -#include <ipxe/vesafb.h> -#include <config/console.h> - -/* Avoid dragging in BIOS console if not otherwise used */ -extern struct console_driver bios_console; -struct console_driver bios_console __attribute__ (( weak )); - -/* Disambiguate the various error causes */ -#define EIO_FAILED __einfo_error ( EINFO_EIO_FAILED ) -#define EINFO_EIO_FAILED \ - __einfo_uniqify ( EINFO_EIO, 0x01, \ - "Function call failed" ) -#define EIO_HARDWARE __einfo_error ( EINFO_EIO_HARDWARE ) -#define EINFO_EIO_HARDWARE \ - __einfo_uniqify ( EINFO_EIO, 0x02, \ - "Not supported in current configuration" ) -#define EIO_MODE __einfo_error ( EINFO_EIO_MODE ) -#define EINFO_EIO_MODE \ - __einfo_uniqify ( EINFO_EIO, 0x03, \ - "Invalid in current video mode" ) -#define EIO_VBE( code ) \ - EUNIQ ( EINFO_EIO, (code), EIO_FAILED, EIO_HARDWARE, EIO_MODE ) - -/* Set default console usage if applicable */ -#if ! ( defined ( CONSOLE_VESAFB ) && CONSOLE_EXPLICIT ( CONSOLE_VESAFB ) ) -#undef CONSOLE_VESAFB -#define CONSOLE_VESAFB ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG ) -#endif - -/** Font corresponding to selected character width and height */ -#define VESAFB_FONT VBE_FONT_8x16 - -/* Forward declaration */ -struct console_driver vesafb_console __console_driver; - -/** A VESA frame buffer */ -struct vesafb { - /** Frame buffer console */ - struct fbcon fbcon; - /** Physical start address */ - physaddr_t start; - /** Pixel geometry */ - struct fbcon_geometry pixel; - /** Margin */ - struct fbcon_margin margin; - /** Colour mapping */ - struct fbcon_colour_map map; - /** Font definition */ - struct fbcon_font font; - /** Saved VGA mode */ - uint8_t saved_mode; -}; - -/** The VESA frame buffer */ -static struct vesafb vesafb; - -/** Base memory buffer used for VBE calls */ -union vbe_buffer { - /** VBE controller information block */ - struct vbe_controller_info controller; - /** VBE mode information block */ - struct vbe_mode_info mode; -}; -static union vbe_buffer __bss16 ( vbe_buf ); -#define vbe_buf __use_data16 ( vbe_buf ) - -/** - * Convert VBE status code to iPXE status code - * - * @v status VBE status code - * @ret rc Return status code - */ -static int vesafb_rc ( unsigned int status ) { - unsigned int code; - - if ( ( status & 0xff ) != 0x4f ) - return -ENOTSUP; - code = ( ( status >> 8 ) & 0xff ); - return ( code ? -EIO_VBE ( code ) : 0 ); -} - -/** - * Get font definition - * - */ -static void vesafb_font ( void ) { - struct segoff font; - - /* Get font information - * - * Working around gcc bugs is icky here. The value we want is - * returned in %ebp, but there's no way to specify %ebp in an - * output constraint. We can't put %ebp in the clobber list, - * because this tends to cause random build failures on some - * gcc versions. We can't manually push/pop %ebp and return - * the value via a generic register output constraint, because - * gcc might choose to use %ebp to satisfy that constraint - * (and we have no way to prevent it from so doing). - * - * Work around this hideous mess by using %ecx and %edx as the - * output registers, since they get clobbered anyway. - */ - __asm__ __volatile__ ( REAL_CODE ( "pushw %%bp\n\t" /* gcc bug */ - "int $0x10\n\t" - "movw %%es, %%cx\n\t" - "movw %%bp, %%dx\n\t" - "popw %%bp\n\t" /* gcc bug */ ) - : "=c" ( font.segment ), - "=d" ( font.offset ) - : "a" ( VBE_GET_FONT ), - "b" ( VESAFB_FONT ) ); - DBGC ( &vbe_buf, "VESAFB has font %04x at %04x:%04x\n", - VESAFB_FONT, font.segment, font.offset ); - vesafb.font.start = real_to_user ( font.segment, font.offset ); -} - -/** - * Get VBE mode list - * - * @ret mode_numbers Mode number list (terminated with VBE_MODE_END) - * @ret rc Return status code - * - * The caller is responsible for eventually freeing the mode list. - */ -static int vesafb_mode_list ( uint16_t **mode_numbers ) { - struct vbe_controller_info *controller = &vbe_buf.controller; - userptr_t video_mode_ptr; - uint16_t mode_number; - uint16_t status; - size_t len; - int rc; - - /* Avoid returning uninitialised data on error */ - *mode_numbers = NULL; - - /* Get controller information block */ - controller->vbe_signature = 0; - __asm__ __volatile__ ( REAL_CODE ( "int $0x10" ) - : "=a" ( status ) - : "a" ( VBE_CONTROLLER_INFO ), - "D" ( __from_data16 ( controller ) ) - : "memory", "ebx", "edx" ); - if ( ( rc = vesafb_rc ( status ) ) != 0 ) { - DBGC ( &vbe_buf, "VESAFB could not get controller information: " - "[%04x] %s\n", status, strerror ( rc ) ); - return rc; - } - if ( controller->vbe_signature != VBE_CONTROLLER_SIGNATURE ) { - DBGC ( &vbe_buf, "VESAFB invalid controller signature " - "\"%c%c%c%c\"\n", ( controller->vbe_signature >> 0 ), - ( controller->vbe_signature >> 8 ), - ( controller->vbe_signature >> 16 ), - ( controller->vbe_signature >> 24 ) ); - DBGC_HDA ( &vbe_buf, 0, controller, sizeof ( *controller ) ); - return -EINVAL; - } - DBGC ( &vbe_buf, "VESAFB found VBE version %d.%d with mode list at " - "%04x:%04x\n", controller->vbe_major_version, - controller->vbe_minor_version, - controller->video_mode_ptr.segment, - controller->video_mode_ptr.offset ); - - /* Calculate length of mode list */ - video_mode_ptr = real_to_user ( controller->video_mode_ptr.segment, - controller->video_mode_ptr.offset ); - len = 0; - do { - copy_from_user ( &mode_number, video_mode_ptr, len, - sizeof ( mode_number ) ); - len += sizeof ( mode_number ); - } while ( mode_number != VBE_MODE_END ); - - /* Allocate and fill mode list */ - *mode_numbers = malloc ( len ); - if ( ! *mode_numbers ) - return -ENOMEM; - copy_from_user ( *mode_numbers, video_mode_ptr, 0, len ); - - return 0; -} - -/** - * Get video mode information - * - * @v mode_number Mode number - * @ret rc Return status code - */ -static int vesafb_mode_info ( unsigned int mode_number ) { - struct vbe_mode_info *mode = &vbe_buf.mode; - uint16_t status; - int rc; - - /* Get mode information */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x10" ) - : "=a" ( status ) - : "a" ( VBE_MODE_INFO ), - "c" ( mode_number ), - "D" ( __from_data16 ( mode ) ) - : "memory" ); - if ( ( rc = vesafb_rc ( status ) ) != 0 ) { - DBGC ( &vbe_buf, "VESAFB could not get mode %04x information: " - "[%04x] %s\n", mode_number, status, strerror ( rc ) ); - return rc; - } - DBGC ( &vbe_buf, "VESAFB mode %04x %dx%d %dbpp(%d:%d:%d:%d) model " - "%02x [x%d]%s%s%s%s%s\n", mode_number, mode->x_resolution, - mode->y_resolution, mode->bits_per_pixel, mode->rsvd_mask_size, - mode->red_mask_size, mode->green_mask_size, mode->blue_mask_size, - mode->memory_model, ( mode->number_of_image_pages + 1 ), - ( ( mode->mode_attributes & VBE_MODE_ATTR_SUPPORTED ) ? - "" : " [unsupported]" ), - ( ( mode->mode_attributes & VBE_MODE_ATTR_TTY ) ? - " [tty]" : "" ), - ( ( mode->mode_attributes & VBE_MODE_ATTR_GRAPHICS ) ? - "" : " [text]" ), - ( ( mode->mode_attributes & VBE_MODE_ATTR_LINEAR ) ? - "" : " [nonlinear]" ), - ( ( mode->mode_attributes & VBE_MODE_ATTR_TRIPLE_BUF ) ? - " [buf]" : "" ) ); - - return 0; -} - -/** - * Set video mode - * - * @v mode_number Mode number - * @ret rc Return status code - */ -static int vesafb_set_mode ( unsigned int mode_number ) { - struct vbe_mode_info *mode = &vbe_buf.mode; - uint16_t status; - int rc; - - /* Get mode information */ - if ( ( rc = vesafb_mode_info ( mode_number ) ) != 0 ) - return rc; - - /* Record mode parameters */ - vesafb.start = mode->phys_base_ptr; - vesafb.pixel.width = mode->x_resolution; - vesafb.pixel.height = mode->y_resolution; - vesafb.pixel.len = ( ( mode->bits_per_pixel + 7 ) / 8 ); - vesafb.pixel.stride = mode->bytes_per_scan_line; - DBGC ( &vbe_buf, "VESAFB mode %04x has frame buffer at %08x\n", - mode_number, mode->phys_base_ptr ); - - /* Initialise font colours */ - vesafb.map.red_scale = ( 8 - mode->red_mask_size ); - vesafb.map.green_scale = ( 8 - mode->green_mask_size ); - vesafb.map.blue_scale = ( 8 - mode->blue_mask_size ); - vesafb.map.red_lsb = mode->red_field_position; - vesafb.map.green_lsb = mode->green_field_position; - vesafb.map.blue_lsb = mode->blue_field_position; - - /* Select this mode */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x10" ) - : "=a" ( status ) - : "a" ( VBE_SET_MODE ), - "b" ( mode_number ) ); - if ( ( rc = vesafb_rc ( status ) ) != 0 ) { - DBGC ( &vbe_buf, "VESAFB could not set mode %04x: [%04x] %s\n", - mode_number, status, strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** - * Select video mode - * - * @v mode_numbers Mode number list (terminated with VBE_MODE_END) - * @v min_width Minimum required width (in pixels) - * @v min_height Minimum required height (in pixels) - * @v min_bpp Minimum required colour depth (in bits per pixel) - * @ret mode_number Mode number, or negative error - */ -static int vesafb_select_mode ( const uint16_t *mode_numbers, - unsigned int min_width, unsigned int min_height, - unsigned int min_bpp ) { - struct vbe_mode_info *mode = &vbe_buf.mode; - int best_mode_number = -ENOENT; - unsigned int best_score = INT_MAX; - unsigned int score; - uint16_t mode_number; - int rc; - - /* Find the first suitable mode */ - while ( ( mode_number = *(mode_numbers++) ) != VBE_MODE_END ) { - - /* Force linear mode variant */ - mode_number |= VBE_MODE_LINEAR; - - /* Get mode information */ - if ( ( rc = vesafb_mode_info ( mode_number ) ) != 0 ) - continue; - - /* Skip unusable modes */ - if ( ( mode->mode_attributes & ( VBE_MODE_ATTR_SUPPORTED | - VBE_MODE_ATTR_GRAPHICS | - VBE_MODE_ATTR_LINEAR ) ) != - ( VBE_MODE_ATTR_SUPPORTED | VBE_MODE_ATTR_GRAPHICS | - VBE_MODE_ATTR_LINEAR ) ) { - continue; - } - if ( mode->memory_model != VBE_MODE_MODEL_DIRECT_COLOUR ) - continue; - - /* Skip modes not meeting the requirements */ - if ( ( mode->x_resolution < min_width ) || - ( mode->y_resolution < min_height ) || - ( mode->bits_per_pixel < min_bpp ) ) { - continue; - } - - /* Select this mode if it has the best (i.e. lowest) - * score. We choose the scoring system to favour - * modes close to the specified width and height; - * within modes of the same width and height we prefer - * a higher colour depth. - */ - score = ( ( mode->x_resolution * mode->y_resolution ) - - mode->bits_per_pixel ); - if ( score < best_score ) { - best_mode_number = mode_number; - best_score = score; - } - } - - if ( best_mode_number >= 0 ) { - DBGC ( &vbe_buf, "VESAFB selected mode %04x\n", - best_mode_number ); - } else { - DBGC ( &vbe_buf, "VESAFB found no suitable mode\n" ); - } - - return best_mode_number; -} - -/** - * Restore video mode - * - */ -static void vesafb_restore ( void ) { - uint32_t discard_a; - - /* Restore saved VGA mode */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x10" ) - : "=a" ( discard_a ) - : "a" ( VBE_SET_VGA_MODE | vesafb.saved_mode ) ); - DBGC ( &vbe_buf, "VESAFB restored VGA mode %#02x\n", - vesafb.saved_mode ); -} - -/** - * Initialise VESA frame buffer - * - * @v config Console configuration, or NULL to reset - * @ret rc Return status code - */ -static int vesafb_init ( struct console_configuration *config ) { - uint32_t discard_b; - uint16_t *mode_numbers; - unsigned int xgap; - unsigned int ygap; - unsigned int left; - unsigned int right; - unsigned int top; - unsigned int bottom; - int mode_number; - int rc; - - /* Record current VGA mode */ - __asm__ __volatile__ ( REAL_CODE ( "int $0x10" ) - : "=a" ( vesafb.saved_mode ), "=b" ( discard_b ) - : "a" ( VBE_GET_VGA_MODE ) ); - DBGC ( &vbe_buf, "VESAFB saved VGA mode %#02x\n", vesafb.saved_mode ); - - /* Get VESA mode list */ - if ( ( rc = vesafb_mode_list ( &mode_numbers ) ) != 0 ) - goto err_mode_list; - - /* Select mode */ - if ( ( mode_number = vesafb_select_mode ( mode_numbers, config->width, - config->height, - config->depth ) ) < 0 ) { - rc = mode_number; - goto err_select_mode; - } - - /* Set mode */ - if ( ( rc = vesafb_set_mode ( mode_number ) ) != 0 ) - goto err_set_mode; - - /* Calculate margin. If the actual screen size is larger than - * the requested screen size, then update the margins so that - * the margin remains relative to the requested screen size. - * (As an exception, if a zero margin was specified then treat - * this as meaning "expand to edge of actual screen".) - */ - xgap = ( vesafb.pixel.width - config->width ); - ygap = ( vesafb.pixel.height - config->height ); - left = ( xgap / 2 ); - right = ( xgap - left ); - top = ( ygap / 2 ); - bottom = ( ygap - top ); - vesafb.margin.left = ( config->left + ( config->left ? left : 0 ) ); - vesafb.margin.right = ( config->right + ( config->right ? right : 0 ) ); - vesafb.margin.top = ( config->top + ( config->top ? top : 0 ) ); - vesafb.margin.bottom = - ( config->bottom + ( config->bottom ? bottom : 0 ) ); - - /* Get font data */ - vesafb_font(); - - /* Initialise frame buffer console */ - if ( ( rc = fbcon_init ( &vesafb.fbcon, phys_to_user ( vesafb.start ), - &vesafb.pixel, &vesafb.margin, &vesafb.map, - &vesafb.font, config->pixbuf ) ) != 0 ) - goto err_fbcon_init; - - free ( mode_numbers ); - return 0; - - fbcon_fini ( &vesafb.fbcon ); - err_fbcon_init: - err_set_mode: - vesafb_restore(); - err_select_mode: - free ( mode_numbers ); - err_mode_list: - return rc; -} - -/** - * Finalise VESA frame buffer - * - */ -static void vesafb_fini ( void ) { - - /* Finalise frame buffer console */ - fbcon_fini ( &vesafb.fbcon ); - - /* Restore saved VGA mode */ - vesafb_restore(); -} - -/** - * Print a character to current cursor position - * - * @v character Character - */ -static void vesafb_putchar ( int character ) { - - fbcon_putchar ( &vesafb.fbcon, character ); -} - -/** - * Configure console - * - * @v config Console configuration, or NULL to reset - * @ret rc Return status code - */ -static int vesafb_configure ( struct console_configuration *config ) { - int rc; - - /* Reset console, if applicable */ - if ( ! vesafb_console.disabled ) { - vesafb_fini(); - bios_console.disabled &= ~CONSOLE_DISABLED_OUTPUT; - ansicol_reset_magic(); - } - vesafb_console.disabled = CONSOLE_DISABLED; - - /* Do nothing more unless we have a usable configuration */ - if ( ( config == NULL ) || - ( config->width == 0 ) || ( config->height == 0 ) ) { - return 0; - } - - /* Initialise VESA frame buffer */ - if ( ( rc = vesafb_init ( config ) ) != 0 ) - return rc; - - /* Mark console as enabled */ - vesafb_console.disabled = 0; - bios_console.disabled |= CONSOLE_DISABLED_OUTPUT; - - /* Set magic colour to transparent if we have a background picture */ - if ( config->pixbuf ) - ansicol_set_magic_transparent(); - - return 0; -} - -/** VESA frame buffer console driver */ -struct console_driver vesafb_console __console_driver = { - .usage = CONSOLE_VESAFB, - .putchar = vesafb_putchar, - .configure = vesafb_configure, - .disabled = CONSOLE_DISABLED, -}; |