diff options
Diffstat (limited to 'qemu/pc-bios/optionrom')
| -rw-r--r-- | qemu/pc-bios/optionrom/Makefile | 33 | ||||
| -rw-r--r-- | qemu/pc-bios/optionrom/kvmvapic.S | 335 | ||||
| -rw-r--r-- | qemu/pc-bios/optionrom/linuxboot.S | 195 | ||||
| -rw-r--r-- | qemu/pc-bios/optionrom/multiboot.S | 232 | ||||
| -rw-r--r-- | qemu/pc-bios/optionrom/optionrom.h | 151 |
5 files changed, 0 insertions, 946 deletions
diff --git a/qemu/pc-bios/optionrom/Makefile b/qemu/pc-bios/optionrom/Makefile deleted file mode 100644 index ce4852a4d..000000000 --- a/qemu/pc-bios/optionrom/Makefile +++ /dev/null @@ -1,33 +0,0 @@ -all: build-all -# Dummy command so that make thinks it has done something - @true - -include ../../config-host.mak -include $(SRC_PATH)/rules.mak - -$(call set-vpath, $(SRC_PATH)/pc-bios/optionrom) - -.PHONY : all clean build-all - -CFLAGS := -Wall -Wstrict-prototypes -Werror -fomit-frame-pointer -fno-builtin -CFLAGS += -I$(SRC_PATH) -CFLAGS += $(call cc-option, $(CFLAGS), -fno-stack-protector) -CFLAGS += $(CFLAGS_NOPIE) -QEMU_CFLAGS = $(CFLAGS) - -build-all: multiboot.bin linuxboot.bin kvmvapic.bin - -# suppress auto-removal of intermediate files -.SECONDARY: - -%.img: %.o - $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -Ttext 0 -e _start -s -o $@ $<," Building $(TARGET_DIR)$@") - -%.raw: %.img - $(call quiet-command,$(OBJCOPY) -O binary -j .text $< $@," Building $(TARGET_DIR)$@") - -%.bin: %.raw - $(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/signrom.py $< $@," Signing $(TARGET_DIR)$@") - -clean: - rm -f *.o *.d *.raw *.img *.bin *~ diff --git a/qemu/pc-bios/optionrom/kvmvapic.S b/qemu/pc-bios/optionrom/kvmvapic.S deleted file mode 100644 index aa17a402d..000000000 --- a/qemu/pc-bios/optionrom/kvmvapic.S +++ /dev/null @@ -1,335 +0,0 @@ -# -# Local APIC acceleration for Windows XP and related guests -# -# Copyright 2011 Red Hat, Inc. and/or its affiliates -# -# Author: Avi Kivity <avi@redhat.com> -# -# This work is licensed under the terms of the GNU GPL, version 2, or (at your -# option) any later version. See the COPYING file in the top-level directory. -# - -#include "optionrom.h" - -OPTION_ROM_START - - # clear vapic area: firmware load using rep insb may cause - # stale tpr/isr/irr data to corrupt the vapic area. - push %es - push %cs - pop %es - xor %ax, %ax - mov $vapic_size/2, %cx - lea vapic, %di - cld - rep stosw - pop %es - - # announce presence to the hypervisor - mov $vapic_base, %ax - out %ax, $0x7e - - lret - - .code32 -vapic_size = 2*4096 - -.macro fixup delta=-4 -777: - .text 1 - .long 777b + \delta - vapic_base - .text 0 -.endm - -.macro reenable_vtpr - out %al, $0x7e -.endm - -.text 1 - fixup_start = . -.text 0 - -.align 16 - -vapic_base: - .ascii "kvm aPiC" - - /* relocation data */ - .long vapic_base ; fixup - .long fixup_start ; fixup - .long fixup_end ; fixup - - .long vapic ; fixup - .long vapic_size -vcpu_shift: - .long 0 -real_tpr: - .long 0 - .long up_set_tpr ; fixup - .long up_set_tpr_eax ; fixup - .long up_get_tpr_eax ; fixup - .long up_get_tpr_ecx ; fixup - .long up_get_tpr_edx ; fixup - .long up_get_tpr_ebx ; fixup - .long 0 /* esp. won't work. */ - .long up_get_tpr_ebp ; fixup - .long up_get_tpr_esi ; fixup - .long up_get_tpr_edi ; fixup - .long up_get_tpr_stack ; fixup - .long mp_set_tpr ; fixup - .long mp_set_tpr_eax ; fixup - .long mp_get_tpr_eax ; fixup - .long mp_get_tpr_ecx ; fixup - .long mp_get_tpr_edx ; fixup - .long mp_get_tpr_ebx ; fixup - .long 0 /* esp. won't work. */ - .long mp_get_tpr_ebp ; fixup - .long mp_get_tpr_esi ; fixup - .long mp_get_tpr_edi ; fixup - .long mp_get_tpr_stack ; fixup - -.macro kvm_hypercall - .byte 0x0f, 0x01, 0xc1 -.endm - -kvm_hypercall_vapic_poll_irq = 1 - -pcr_cpu = 0x51 - -.align 64 - -mp_get_tpr_eax: - pushf - cli - reenable_vtpr - push %ecx - - fs/movzbl pcr_cpu, %eax - - mov vcpu_shift, %ecx ; fixup - shl %cl, %eax - testb $1, vapic+4(%eax) ; fixup delta=-5 - jz mp_get_tpr_bad - movzbl vapic(%eax), %eax ; fixup - -mp_get_tpr_out: - pop %ecx - popf - ret - -mp_get_tpr_bad: - mov real_tpr, %eax ; fixup - mov (%eax), %eax - jmp mp_get_tpr_out - -mp_get_tpr_ebx: - mov %eax, %ebx - call mp_get_tpr_eax - xchg %eax, %ebx - ret - -mp_get_tpr_ecx: - mov %eax, %ecx - call mp_get_tpr_eax - xchg %eax, %ecx - ret - -mp_get_tpr_edx: - mov %eax, %edx - call mp_get_tpr_eax - xchg %eax, %edx - ret - -mp_get_tpr_esi: - mov %eax, %esi - call mp_get_tpr_eax - xchg %eax, %esi - ret - -mp_get_tpr_edi: - mov %eax, %edi - call mp_get_tpr_edi - xchg %eax, %edi - ret - -mp_get_tpr_ebp: - mov %eax, %ebp - call mp_get_tpr_eax - xchg %eax, %ebp - ret - -mp_get_tpr_stack: - call mp_get_tpr_eax - xchg %eax, 4(%esp) - ret - -mp_set_tpr_eax: - push %eax - call mp_set_tpr - ret - -mp_set_tpr: - pushf - push %eax - push %ecx - push %edx - push %ebx - cli - reenable_vtpr - -mp_set_tpr_failed: - fs/movzbl pcr_cpu, %edx - - mov vcpu_shift, %ecx ; fixup - shl %cl, %edx - - testb $1, vapic+4(%edx) ; fixup delta=-5 - jz mp_set_tpr_bad - - mov vapic(%edx), %eax ; fixup - - mov %eax, %ebx - mov 24(%esp), %bl - - /* %ebx = new vapic (%bl = tpr, %bh = isr, %b3 = irr) */ - - lock cmpxchg %ebx, vapic(%edx) ; fixup - jnz mp_set_tpr_failed - - /* compute ppr */ - cmp %bh, %bl - jae mp_tpr_is_bigger -mp_isr_is_bigger: - mov %bh, %bl -mp_tpr_is_bigger: - /* %bl = ppr */ - rol $8, %ebx - /* now: %bl = irr, %bh = ppr */ - cmp %bh, %bl - ja mp_set_tpr_poll_irq - -mp_set_tpr_out: - pop %ebx - pop %edx - pop %ecx - pop %eax - popf - ret $4 - -mp_set_tpr_poll_irq: - mov $kvm_hypercall_vapic_poll_irq, %eax - kvm_hypercall - jmp mp_set_tpr_out - -mp_set_tpr_bad: - mov 24(%esp), %ecx - mov real_tpr, %eax ; fixup - mov %ecx, (%eax) - jmp mp_set_tpr_out - -up_get_tpr_eax: - reenable_vtpr - movzbl vapic, %eax ; fixup - ret - -up_get_tpr_ebx: - reenable_vtpr - movzbl vapic, %ebx ; fixup - ret - -up_get_tpr_ecx: - reenable_vtpr - movzbl vapic, %ecx ; fixup - ret - -up_get_tpr_edx: - reenable_vtpr - movzbl vapic, %edx ; fixup - ret - -up_get_tpr_esi: - reenable_vtpr - movzbl vapic, %esi ; fixup - ret - -up_get_tpr_edi: - reenable_vtpr - movzbl vapic, %edi ; fixup - ret - -up_get_tpr_ebp: - reenable_vtpr - movzbl vapic, %ebp ; fixup - ret - -up_get_tpr_stack: - reenable_vtpr - movzbl vapic, %eax ; fixup - xchg %eax, 4(%esp) - ret - -up_set_tpr_eax: - push %eax - call up_set_tpr - ret - -up_set_tpr: - pushf - push %eax - push %ebx - reenable_vtpr - -up_set_tpr_failed: - mov vapic, %eax ; fixup - - mov %eax, %ebx - mov 16(%esp), %bl - - /* %ebx = new vapic (%bl = tpr, %bh = isr, %b3 = irr) */ - - lock cmpxchg %ebx, vapic ; fixup - jnz up_set_tpr_failed - - /* compute ppr */ - cmp %bh, %bl - jae up_tpr_is_bigger -up_isr_is_bigger: - mov %bh, %bl -up_tpr_is_bigger: - /* %bl = ppr */ - rol $8, %ebx - /* now: %bl = irr, %bh = ppr */ - cmp %bh, %bl - ja up_set_tpr_poll_irq - -up_set_tpr_out: - pop %ebx - pop %eax - popf - ret $4 - -up_set_tpr_poll_irq: - mov $kvm_hypercall_vapic_poll_irq, %eax - kvm_hypercall - jmp up_set_tpr_out - -.text 1 - fixup_end = . -.text 0 - -/* - * vapic format: - * per-vcpu records of size 2^vcpu shift. - * byte 0: tpr (r/w) - * byte 1: highest in-service interrupt (isr) (r/o); bits 3:0 are zero - * byte 2: zero (r/o) - * byte 3: highest pending interrupt (irr) (r/o) - */ -.text 2 - -.align 128 - -vapic: -. = . + vapic_size - -OPTION_ROM_END diff --git a/qemu/pc-bios/optionrom/linuxboot.S b/qemu/pc-bios/optionrom/linuxboot.S deleted file mode 100644 index ba821ab92..000000000 --- a/qemu/pc-bios/optionrom/linuxboot.S +++ /dev/null @@ -1,195 +0,0 @@ -/* - * Linux Boot Option ROM - * - * 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, see <http://www.gnu.org/licenses/>. - * - * Copyright Novell Inc, 2009 - * Authors: Alexander Graf <agraf@suse.de> - * - * Based on code in hw/pc.c. - */ - -#include "optionrom.h" - -#define BOOT_ROM_PRODUCT "Linux loader" - -BOOT_ROM_START - -run_linuxboot: - - cli - cld - - jmp copy_kernel -boot_kernel: - - read_fw FW_CFG_SETUP_ADDR - - mov %eax, %ebx - shr $4, %ebx - - /* All segments contain real_addr */ - mov %bx, %ds - mov %bx, %es - mov %bx, %fs - mov %bx, %gs - mov %bx, %ss - - /* CX = CS we want to jump to */ - add $0x20, %bx - mov %bx, %cx - - /* SP = cmdline_addr-real_addr-16 */ - read_fw FW_CFG_CMDLINE_ADDR - mov %eax, %ebx - read_fw FW_CFG_SETUP_ADDR - sub %eax, %ebx - sub $16, %ebx - mov %ebx, %esp - - /* Build indirect lret descriptor */ - pushw %cx /* CS */ - xor %ax, %ax - pushw %ax /* IP = 0 */ - - /* Clear registers */ - xor %eax, %eax - xor %ebx, %ebx - xor %ecx, %ecx - xor %edx, %edx - xor %edi, %edi - xor %ebp, %ebp - - /* Jump to Linux */ - lret - - -copy_kernel: - /* Read info block in low memory (0x10000 or 0x90000) */ - read_fw FW_CFG_SETUP_ADDR - shr $4, %eax - mov %eax, %es - xor %edi, %edi - read_fw_blob_addr32_edi(FW_CFG_SETUP) - - cmpw $0x203, %es:0x206 // if protocol >= 0x203 - jae 1f // have initrd_max - movl $0x37ffffff, %es:0x22c // else assume 0x37ffffff -1: - - /* Check if using kernel-specified initrd address */ - read_fw FW_CFG_INITRD_ADDR - mov %eax, %edi // (load_kernel wants it in %edi) - read_fw FW_CFG_INITRD_SIZE // find end of initrd - add %edi, %eax - xor %es:0x22c, %eax // if it matches es:0x22c - and $-4096, %eax // (apart from padding for page) - jz load_kernel // then initrd is not at top - // of memory - - /* pc.c placed the initrd at end of memory. Compute a better - * initrd address based on e801 data. - */ - mov $0xe801, %ax - xor %cx, %cx - xor %dx, %dx - int $0x15 - - /* Output could be in AX/BX or CX/DX */ - or %cx, %cx - jnz 1f - or %dx, %dx - jnz 1f - mov %ax, %cx - mov %bx, %dx -1: - - or %dx, %dx - jnz 2f - addw $1024, %cx /* add 1 MB */ - movzwl %cx, %edi - shll $10, %edi /* convert to bytes */ - jmp 3f - -2: - addw $16777216 >> 16, %dx /* add 16 MB */ - movzwl %dx, %edi - shll $16, %edi /* convert to bytes */ - -3: - read_fw FW_CFG_INITRD_SIZE - subl %eax, %edi - andl $-4096, %edi /* EDI = start of initrd */ - movl %edi, %es:0x218 /* put it in the header */ - -load_kernel: - /* We need to load the kernel into memory we can't access in 16 bit - mode, so let's get into 32 bit mode, write the kernel and jump - back again. */ - - /* Reserve space on the stack for our GDT descriptor. */ - mov %esp, %ebp - sub $16, %esp - - /* Now create the GDT descriptor */ - movw $((3 * 8) - 1), -16(%bp) - mov %cs, %eax - movzwl %ax, %eax - shl $4, %eax - addl $gdt, %eax - movl %eax, -14(%bp) - - /* And load the GDT */ - data32 lgdt -16(%bp) - mov %ebp, %esp - - /* Get us to protected mode now */ - mov $1, %eax - mov %eax, %cr0 - - /* So we can set ES to a 32-bit segment */ - mov $0x10, %eax - mov %eax, %es - - /* We're now running in 16-bit CS, but 32-bit ES! */ - - /* Load kernel and initrd */ - read_fw_blob_addr32_edi(FW_CFG_INITRD) - read_fw_blob_addr32(FW_CFG_KERNEL) - read_fw_blob_addr32(FW_CFG_CMDLINE) - - /* And now jump into Linux! */ - mov $0, %eax - mov %eax, %cr0 - - /* ES = CS */ - mov %cs, %ax - mov %ax, %es - - jmp boot_kernel - -/* Variables */ - -.align 4, 0 -gdt: - /* 0x00 */ -.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 - - /* 0x08: code segment (base=0, limit=0xfffff, type=32bit code exec/read, DPL=0, 4k) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00 - - /* 0x10: data segment (base=0, limit=0xfffff, type=32bit data read/write, DPL=0, 4k) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00 - -BOOT_ROM_END diff --git a/qemu/pc-bios/optionrom/multiboot.S b/qemu/pc-bios/optionrom/multiboot.S deleted file mode 100644 index b7efe4de3..000000000 --- a/qemu/pc-bios/optionrom/multiboot.S +++ /dev/null @@ -1,232 +0,0 @@ -/* - * Multiboot Option ROM - * - * 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, see <http://www.gnu.org/licenses/>. - * - * Copyright Novell Inc, 2009 - * Authors: Alexander Graf <agraf@suse.de> - */ - -#include "optionrom.h" - -#define BOOT_ROM_PRODUCT "multiboot loader" - -#define MULTIBOOT_MAGIC 0x2badb002 - -#define GS_PROT_JUMP 0 -#define GS_GDT_DESC 6 - - -BOOT_ROM_START - -run_multiboot: - - cli - cld - - mov %cs, %eax - shl $0x4, %eax - - /* set up a long jump descriptor that is PC relative */ - - /* move stack memory to %gs */ - mov %ss, %ecx - shl $0x4, %ecx - mov %esp, %ebx - add %ebx, %ecx - sub $0x20, %ecx - sub $0x30, %esp - shr $0x4, %ecx - mov %cx, %gs - - /* now push the indirect jump descriptor there */ - mov (prot_jump), %ebx - add %eax, %ebx - movl %ebx, %gs:GS_PROT_JUMP - mov $8, %bx - movw %bx, %gs:GS_PROT_JUMP + 4 - - /* fix the gdt descriptor to be PC relative */ - movw (gdt_desc), %bx - movw %bx, %gs:GS_GDT_DESC - movl (gdt_desc+2), %ebx - add %eax, %ebx - movl %ebx, %gs:GS_GDT_DESC + 2 - - xor %eax, %eax - mov %eax, %es - - /* Read the bootinfo struct into RAM */ - read_fw_blob(FW_CFG_INITRD) - - /* FS = bootinfo_struct */ - read_fw FW_CFG_INITRD_ADDR - shr $4, %eax - mov %ax, %fs - - /* Account for the EBDA in the multiboot structure's e801 - * map. - */ - int $0x12 - cwtl - movl %eax, %fs:4 - - /* ES = mmap_addr */ - mov %fs:48, %eax - shr $4, %eax - mov %ax, %es - - /* Initialize multiboot mmap structs using int 0x15(e820) */ - xor %ebx, %ebx - /* Start storing mmap data at %es:0 */ - xor %edi, %edi - -mmap_loop: - /* The multiboot entry size has offset -4, so leave some space */ - add $4, %di - /* entry size (mmap struct) & max buffer size (int15) */ - movl $20, %ecx - /* e820 */ - movl $0x0000e820, %eax - /* 'SMAP' magic */ - movl $0x534d4150, %edx - int $0x15 - -mmap_check_entry: - /* Error or last entry already done? */ - jb mmap_done - -mmap_store_entry: - /* store entry size */ - /* old as(1) doesn't like this insn so emit the bytes instead: - movl %ecx, %es:-4(%edi) - */ - .dc.b 0x26,0x67,0x66,0x89,0x4f,0xfc - - /* %edi += entry_size, store as mbs_mmap_length */ - add %ecx, %edi - movw %di, %fs:0x2c - - /* Continuation value 0 means last entry */ - test %ebx, %ebx - jnz mmap_loop - -mmap_done: - /* Calculate upper_mem field: The amount of memory between 1 MB and - the first upper memory hole. Get it from the mmap. */ - xor %di, %di - mov $0x100000, %edx -upper_mem_entry: - cmp %fs:0x2c, %di - je upper_mem_done - add $4, %di - - /* Skip if type != 1 */ - cmpl $1, %es:16(%di) - jne upper_mem_next - - /* Skip if > 4 GB */ - movl %es:4(%di), %eax - test %eax, %eax - jnz upper_mem_next - - /* Check for contiguous extension (base <= %edx < base + length) */ - movl %es:(%di), %eax - cmp %eax, %edx - jb upper_mem_next - addl %es:8(%di), %eax - cmp %eax, %edx - jae upper_mem_next - - /* If so, update %edx, and restart the search (mmap isn't ordered) */ - mov %eax, %edx - xor %di, %di - jmp upper_mem_entry - -upper_mem_next: - addl %es:-4(%di), %edi - jmp upper_mem_entry - -upper_mem_done: - sub $0x100000, %edx - shr $10, %edx - mov %edx, %fs:0x8 - -real_to_prot: - /* Load the GDT before going into protected mode */ -lgdt: - data32 lgdt %gs:GS_GDT_DESC - - /* get us to protected mode now */ - movl $1, %eax - movl %eax, %cr0 - - /* the LJMP sets CS for us and gets us to 32-bit */ -ljmp: - data32 ljmp *%gs:GS_PROT_JUMP - -prot_mode: -.code32 - - /* initialize all other segments */ - movl $0x10, %eax - movl %eax, %ss - movl %eax, %ds - movl %eax, %es - movl %eax, %fs - movl %eax, %gs - - /* Read the kernel and modules into RAM */ - read_fw_blob(FW_CFG_KERNEL) - - /* Jump off to the kernel */ - read_fw FW_CFG_KERNEL_ENTRY - mov %eax, %ecx - - /* EBX contains a pointer to the bootinfo struct */ - read_fw FW_CFG_INITRD_ADDR - movl %eax, %ebx - - /* EAX has to contain the magic */ - movl $MULTIBOOT_MAGIC, %eax -ljmp2: - jmp *%ecx - -/* Variables */ -.align 4, 0 -prot_jump: .long prot_mode - .short 8 - -.align 4, 0 -gdt: - /* 0x00 */ -.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 - - /* 0x08: code segment (base=0, limit=0xfffff, type=32bit code exec/read, DPL=0, 4k) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00 - - /* 0x10: data segment (base=0, limit=0xfffff, type=32bit data read/write, DPL=0, 4k) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00 - - /* 0x18: code segment (base=0, limit=0x0ffff, type=16bit code exec/read/conf, DPL=0, 1b) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x9e, 0x00, 0x00 - - /* 0x20: data segment (base=0, limit=0x0ffff, type=16bit data read/write, DPL=0, 1b) */ -.byte 0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0x00, 0x00 - -gdt_desc: -.short (5 * 8) - 1 -.long gdt - -BOOT_ROM_END diff --git a/qemu/pc-bios/optionrom/optionrom.h b/qemu/pc-bios/optionrom/optionrom.h deleted file mode 100644 index 6c4c2c82f..000000000 --- a/qemu/pc-bios/optionrom/optionrom.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * Common Option ROM Functions - * - * 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, see <http://www.gnu.org/licenses/>. - * - * Copyright Novell Inc, 2009 - * Authors: Alexander Graf <agraf@suse.de> - */ - - -#include "../../include/hw/nvram/fw_cfg_keys.h" - -#define BIOS_CFG_IOPORT_CFG 0x510 -#define BIOS_CFG_IOPORT_DATA 0x511 - -/* Break the translation block flow so -d cpu shows us values */ -#define DEBUG_HERE \ - jmp 1f; \ - 1: - -/* - * Read a variable from the fw_cfg device. - * Clobbers: %edx - * Out: %eax - */ -.macro read_fw VAR - mov $\VAR, %ax - mov $BIOS_CFG_IOPORT_CFG, %dx - outw %ax, (%dx) - mov $BIOS_CFG_IOPORT_DATA, %dx - inb (%dx), %al - shl $8, %eax - inb (%dx), %al - shl $8, %eax - inb (%dx), %al - shl $8, %eax - inb (%dx), %al - bswap %eax -.endm - -#define read_fw_blob_pre(var) \ - read_fw var ## _SIZE; \ - mov %eax, %ecx; \ - mov $var ## _DATA, %ax; \ - mov $BIOS_CFG_IOPORT_CFG, %edx; \ - outw %ax, (%dx); \ - mov $BIOS_CFG_IOPORT_DATA, %dx; \ - cld - -/* - * Read a blob from the fw_cfg device. - * Requires _ADDR, _SIZE and _DATA values for the parameter. - * - * Clobbers: %eax, %edx, %es, %ecx, %edi - */ -#define read_fw_blob(var) \ - read_fw var ## _ADDR; \ - mov %eax, %edi; \ - read_fw_blob_pre(var); \ - /* old as(1) doesn't like this insn so emit the bytes instead: \ - rep insb (%dx), %es:(%edi); \ - */ \ - .dc.b 0xf3,0x6c - -/* - * Read a blob from the fw_cfg device in forced addr32 mode. - * Requires _ADDR, _SIZE and _DATA values for the parameter. - * - * Clobbers: %eax, %edx, %es, %ecx, %edi - */ -#define read_fw_blob_addr32(var) \ - read_fw var ## _ADDR; \ - mov %eax, %edi; \ - read_fw_blob_pre(var); \ - /* old as(1) doesn't like this insn so emit the bytes instead: \ - addr32 rep insb (%dx), %es:(%edi); \ - */ \ - .dc.b 0x67,0xf3,0x6c - -/* - * Read a blob from the fw_cfg device in forced addr32 mode, address is in %edi. - * Requires _SIZE and _DATA values for the parameter. - * - * Clobbers: %eax, %edx, %edi, %es, %ecx - */ -#define read_fw_blob_addr32_edi(var) \ - read_fw_blob_pre(var); \ - /* old as(1) doesn't like this insn so emit the bytes instead: \ - addr32 rep insb (%dx), %es:(%edi); \ - */ \ - .dc.b 0x67,0xf3,0x6c - -#define OPTION_ROM_START \ - .code16; \ - .text; \ - .global _start; \ - _start:; \ - .short 0xaa55; \ - .byte (_end - _start) / 512; - -#define BOOT_ROM_START \ - OPTION_ROM_START \ - lret; \ - .org 0x18; \ - .short 0; \ - .short _pnph; \ - _pnph: \ - .ascii "$PnP"; \ - .byte 0x01; \ - .byte ( _pnph_len / 16 ); \ - .short 0x0000; \ - .byte 0x00; \ - .byte 0x00; \ - .long 0x00000000; \ - .short _manufacturer; \ - .short _product; \ - .long 0x00000000; \ - .short 0x0000; \ - .short 0x0000; \ - .short _bev; \ - .short 0x0000; \ - .short 0x0000; \ - .equ _pnph_len, . - _pnph; \ - _bev:; \ - /* DS = CS */ \ - movw %cs, %ax; \ - movw %ax, %ds; - -#define OPTION_ROM_END \ - .byte 0; \ - .align 512, 0; \ - _end: - -#define BOOT_ROM_END \ - _manufacturer:; \ - .asciz "QEMU"; \ - _product:; \ - .asciz BOOT_ROM_PRODUCT; \ - OPTION_ROM_END - |