diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/interface/pxe/pxe_call.c')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/interface/pxe/pxe_call.c | 354 |
1 files changed, 0 insertions, 354 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pxe/pxe_call.c b/qemu/roms/ipxe/src/arch/i386/interface/pxe/pxe_call.c deleted file mode 100644 index 104313666..000000000 --- a/qemu/roms/ipxe/src/arch/i386/interface/pxe/pxe_call.c +++ /dev/null @@ -1,354 +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 <ipxe/uaccess.h> -#include <ipxe/init.h> -#include <ipxe/profile.h> -#include <setjmp.h> -#include <registers.h> -#include <biosint.h> -#include <pxe.h> -#include <pxe_call.h> - -/** @file - * - * PXE API entry point - */ - -/* Disambiguate the various error causes */ -#define EINFO_EPXENBP \ - __einfo_uniqify ( EINFO_EPLATFORM, 0x01, \ - "External PXE NBP error" ) -#define EPXENBP( status ) EPLATFORM ( EINFO_EPXENBP, status ) - -/** Vector for chaining INT 1A */ -extern struct segoff __text16 ( pxe_int_1a_vector ); -#define pxe_int_1a_vector __use_text16 ( pxe_int_1a_vector ) - -/** INT 1A handler */ -extern void pxe_int_1a ( void ); - -/** INT 1A hooked flag */ -static int int_1a_hooked = 0; - -/** PXENV_UNDI_TRANSMIT API call profiler */ -static struct profiler pxe_api_tx_profiler __profiler = - { .name = "pxeapi.tx" }; - -/** PXENV_UNDI_ISR API call profiler */ -static struct profiler pxe_api_isr_profiler __profiler = - { .name = "pxeapi.isr" }; - -/** PXE unknown API call profiler - * - * This profiler can be used to measure the overhead of a dummy PXE - * API call. - */ -static struct profiler pxe_api_unknown_profiler __profiler = - { .name = "pxeapi.unknown" }; - -/** Miscellaneous PXE API call profiler */ -static struct profiler pxe_api_misc_profiler __profiler = - { .name = "pxeapi.misc" }; - -/** - * Handle an unknown PXE API call - * - * @v pxenv_unknown Pointer to a struct s_PXENV_UNKNOWN - * @ret #PXENV_EXIT_FAILURE Always - * @err #PXENV_STATUS_UNSUPPORTED Always - */ -static PXENV_EXIT_t pxenv_unknown ( struct s_PXENV_UNKNOWN *pxenv_unknown ) { - pxenv_unknown->Status = PXENV_STATUS_UNSUPPORTED; - return PXENV_EXIT_FAILURE; -} - -/** Unknown PXE API call list */ -struct pxe_api_call pxenv_unknown_api __pxe_api_call = - PXE_API_CALL ( PXENV_UNKNOWN, pxenv_unknown, struct s_PXENV_UNKNOWN ); - -/** - * Locate PXE API call - * - * @v opcode Opcode - * @ret call PXE API call, or NULL - */ -static struct pxe_api_call * find_pxe_api_call ( uint16_t opcode ) { - struct pxe_api_call *call; - - for_each_table_entry ( call, PXE_API_CALLS ) { - if ( call->opcode == opcode ) - return call; - } - return NULL; -} - -/** - * Determine applicable profiler (for debugging) - * - * @v opcode PXE opcode - * @ret profiler Profiler - */ -static struct profiler * pxe_api_profiler ( unsigned int opcode ) { - - /* Determine applicable profiler */ - switch ( opcode ) { - case PXENV_UNDI_TRANSMIT: - return &pxe_api_tx_profiler; - case PXENV_UNDI_ISR: - return &pxe_api_isr_profiler; - case PXENV_UNKNOWN: - return &pxe_api_unknown_profiler; - default: - return &pxe_api_misc_profiler; - } -} - -/** - * Dispatch PXE API call - * - * @v bx PXE opcode - * @v es:di Address of PXE parameter block - * @ret ax PXE exit code - */ -__asmcall void pxe_api_call ( struct i386_all_regs *ix86 ) { - uint16_t opcode = ix86->regs.bx; - userptr_t uparams = real_to_user ( ix86->segs.es, ix86->regs.di ); - struct profiler *profiler = pxe_api_profiler ( opcode ); - struct pxe_api_call *call; - union u_PXENV_ANY params; - PXENV_EXIT_t ret; - - /* Start profiling */ - profile_start ( profiler ); - - /* Locate API call */ - call = find_pxe_api_call ( opcode ); - if ( ! call ) { - DBGC ( &pxe_netdev, "PXENV_UNKNOWN_%04x\n", opcode ); - call = &pxenv_unknown_api; - } - - /* Copy parameter block from caller */ - copy_from_user ( ¶ms, uparams, 0, call->params_len ); - - /* Set default status in case child routine fails to do so */ - params.Status = PXENV_STATUS_FAILURE; - - /* Hand off to relevant API routine */ - ret = call->entry ( ¶ms ); - - /* Copy modified parameter block back to caller and return */ - copy_to_user ( uparams, 0, ¶ms, call->params_len ); - ix86->regs.ax = ret; - - /* Stop profiling, if applicable */ - profile_stop ( profiler ); -} - -/** - * Dispatch weak PXE API call with PXE stack available - * - * @v ix86 Registers for PXE call - * @ret present Zero (PXE stack present) - */ -int pxe_api_call_weak ( struct i386_all_regs *ix86 ) { - pxe_api_call ( ix86 ); - return 0; -} - -/** - * Dispatch PXE loader call - * - * @v es:di Address of PXE parameter block - * @ret ax PXE exit code - */ -__asmcall void pxe_loader_call ( struct i386_all_regs *ix86 ) { - userptr_t uparams = real_to_user ( ix86->segs.es, ix86->regs.di ); - struct s_UNDI_LOADER params; - PXENV_EXIT_t ret; - - /* Copy parameter block from caller */ - copy_from_user ( ¶ms, uparams, 0, sizeof ( params ) ); - - /* Fill in ROM segment address */ - ppxe.UNDIROMID.segment = ix86->segs.ds; - - /* Set default status in case child routine fails to do so */ - params.Status = PXENV_STATUS_FAILURE; - - /* Call UNDI loader */ - ret = undi_loader ( ¶ms ); - - /* Copy modified parameter block back to caller and return */ - copy_to_user ( uparams, 0, ¶ms, sizeof ( params ) ); - ix86->regs.ax = ret; -} - -/** - * Calculate byte checksum as used by PXE - * - * @v data Data - * @v size Length of data - * @ret sum Checksum - */ -static uint8_t pxe_checksum ( void *data, size_t size ) { - uint8_t *bytes = data; - uint8_t sum = 0; - - while ( size-- ) { - sum += *bytes++; - } - return sum; -} - -/** - * Initialise !PXE and PXENV+ structures - * - */ -static void pxe_init_structures ( void ) { - uint32_t rm_cs_phys = ( rm_cs << 4 ); - uint32_t rm_ds_phys = ( rm_ds << 4 ); - - /* Fill in missing segment fields */ - ppxe.EntryPointSP.segment = rm_cs; - ppxe.EntryPointESP.segment = rm_cs; - ppxe.Stack.segment_address = rm_ds; - ppxe.Stack.Physical_address = rm_ds_phys; - ppxe.UNDIData.segment_address = rm_ds; - ppxe.UNDIData.Physical_address = rm_ds_phys; - ppxe.UNDICode.segment_address = rm_cs; - ppxe.UNDICode.Physical_address = rm_cs_phys; - ppxe.UNDICodeWrite.segment_address = rm_cs; - ppxe.UNDICodeWrite.Physical_address = rm_cs_phys; - pxenv.RMEntry.segment = rm_cs; - pxenv.StackSeg = rm_ds; - pxenv.UNDIDataSeg = rm_ds; - pxenv.UNDICodeSeg = rm_cs; - pxenv.PXEPtr.segment = rm_cs; - - /* Update checksums */ - ppxe.StructCksum -= pxe_checksum ( &ppxe, sizeof ( ppxe ) ); - pxenv.Checksum -= pxe_checksum ( &pxenv, sizeof ( pxenv ) ); -} - -/** PXE structure initialiser */ -struct init_fn pxe_init_fn __init_fn ( INIT_NORMAL ) = { - .initialise = pxe_init_structures, -}; - -/** - * Activate PXE stack - * - * @v netdev Net device to use as PXE net device - */ -void pxe_activate ( struct net_device *netdev ) { - - /* Ensure INT 1A is hooked */ - if ( ! int_1a_hooked ) { - hook_bios_interrupt ( 0x1a, ( unsigned int ) pxe_int_1a, - &pxe_int_1a_vector ); - devices_get(); - int_1a_hooked = 1; - } - - /* Set PXE network device */ - pxe_set_netdev ( netdev ); -} - -/** - * Deactivate PXE stack - * - * @ret rc Return status code - */ -int pxe_deactivate ( void ) { - int rc; - - /* Clear PXE network device */ - pxe_set_netdev ( NULL ); - - /* Ensure INT 1A is unhooked, if possible */ - if ( int_1a_hooked ) { - if ( ( rc = unhook_bios_interrupt ( 0x1a, - (unsigned int) pxe_int_1a, - &pxe_int_1a_vector ))!= 0){ - DBG ( "Could not unhook INT 1A: %s\n", - strerror ( rc ) ); - return rc; - } - devices_put(); - int_1a_hooked = 0; - } - - return 0; -} - -/** Jump buffer for PXENV_RESTART_TFTP */ -rmjmp_buf pxe_restart_nbp; - -/** - * Start PXE NBP at 0000:7c00 - * - * @ret rc Return status code - */ -int pxe_start_nbp ( void ) { - int jmp; - int discard_b, discard_c, discard_d, discard_D; - uint16_t status; - - /* Allow restarting NBP via PXENV_RESTART_TFTP */ - jmp = rmsetjmp ( pxe_restart_nbp ); - if ( jmp ) - DBG ( "Restarting NBP (%x)\n", jmp ); - - /* Far call to PXE NBP */ - __asm__ __volatile__ ( REAL_CODE ( "pushl %%ebp\n\t" /* gcc bug */ - "movw %%cx, %%es\n\t" - "pushw %%es\n\t" - "pushw %%di\n\t" - "sti\n\t" - "lcall $0, $0x7c00\n\t" - "popl %%ebp\n\t" /* discard */ - "popl %%ebp\n\t" /* gcc bug */ ) - : "=a" ( status ), "=b" ( discard_b ), - "=c" ( discard_c ), "=d" ( discard_d ), - "=D" ( discard_D ) - : "a" ( 0 ), "b" ( __from_text16 ( &pxenv ) ), - "c" ( rm_cs ), - "d" ( virt_to_phys ( &pxenv ) ), - "D" ( __from_text16 ( &ppxe ) ) - : "esi", "memory" ); - if ( status ) - return -EPXENBP ( status ); - - return 0; -} - -REQUIRING_SYMBOL ( pxe_api_call ); -REQUIRE_OBJECT ( pxe_preboot ); -REQUIRE_OBJECT ( pxe_undi ); -REQUIRE_OBJECT ( pxe_udp ); -REQUIRE_OBJECT ( pxe_tftp ); -REQUIRE_OBJECT ( pxe_file ); |