mirror of https://github.com/xqemu/xqemu.git
93 lines
3.1 KiB
C
93 lines
3.1 KiB
C
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/*
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* QEMU PC System Firmware
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*
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* Copyright (c) 2003-2004 Fabrice Bellard
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* Copyright (c) 2011-2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "pc.h"
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#include "loader.h"
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#include "sysemu.h"
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#define BIOS_FILENAME "bios.bin"
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static void pc_system_rom_init(MemoryRegion *rom_memory)
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{
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char *filename;
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MemoryRegion *bios, *isa_bios;
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int bios_size, isa_bios_size;
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int ret;
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/* BIOS load */
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if (bios_name == NULL) {
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bios_name = BIOS_FILENAME;
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}
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
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if (filename) {
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bios_size = get_image_size(filename);
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} else {
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bios_size = -1;
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}
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if (bios_size <= 0 ||
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(bios_size % 65536) != 0) {
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goto bios_error;
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}
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bios = g_malloc(sizeof(*bios));
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memory_region_init_ram(bios, "pc.bios", bios_size);
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vmstate_register_ram_global(bios);
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memory_region_set_readonly(bios, true);
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ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1);
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if (ret != 0) {
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bios_error:
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fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name);
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exit(1);
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}
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if (filename) {
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g_free(filename);
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}
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/* map the last 128KB of the BIOS in ISA space */
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isa_bios_size = bios_size;
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if (isa_bios_size > (128 * 1024)) {
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isa_bios_size = 128 * 1024;
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}
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isa_bios = g_malloc(sizeof(*isa_bios));
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memory_region_init_alias(isa_bios, "isa-bios", bios,
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bios_size - isa_bios_size, isa_bios_size);
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memory_region_add_subregion_overlap(rom_memory,
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0x100000 - isa_bios_size,
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isa_bios,
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1);
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memory_region_set_readonly(isa_bios, true);
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/* map all the bios at the top of memory */
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memory_region_add_subregion(rom_memory,
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(uint32_t)(-bios_size),
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bios);
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}
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void pc_system_firmware_init(MemoryRegion *rom_memory)
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{
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pc_system_rom_init(rom_memory);
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}
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