root / hw / pc_sysfw.c @ b072a3c8
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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 "sysbus.h" |
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#include "hw.h" |
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#include "pc.h" |
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#include "hw/boards.h" |
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#include "loader.h" |
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#include "sysemu.h" |
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#include "flash.h" |
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#include "kvm.h" |
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#define BIOS_FILENAME "bios.bin" |
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typedef struct PcSysFwDevice { |
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SysBusDevice busdev; |
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uint8_t rom_only; |
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} PcSysFwDevice; |
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static void pc_isa_bios_init(MemoryRegion *rom_memory, |
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MemoryRegion *flash_mem, |
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int ram_size)
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{ |
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int isa_bios_size;
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MemoryRegion *isa_bios; |
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uint64_t flash_size; |
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void *flash_ptr, *isa_bios_ptr;
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flash_size = memory_region_size(flash_mem); |
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/* map the last 128KB of the BIOS in ISA space */
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isa_bios_size = flash_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_ram(isa_bios, "isa-bios", isa_bios_size);
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vmstate_register_ram_global(isa_bios); |
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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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/* copy ISA rom image from top of flash memory */
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flash_ptr = memory_region_get_ram_ptr(flash_mem); |
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isa_bios_ptr = memory_region_get_ram_ptr(isa_bios); |
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memcpy(isa_bios_ptr, |
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((uint8_t*)flash_ptr) + (flash_size - isa_bios_size), |
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isa_bios_size); |
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memory_region_set_readonly(isa_bios, true);
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} |
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static void pc_fw_add_pflash_drv(void) |
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{ |
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QemuOpts *opts; |
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QEMUMachine *machine; |
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char *filename;
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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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opts = drive_add(IF_PFLASH, -1, filename, "readonly=on"); |
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if (opts == NULL) { |
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return;
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} |
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machine = find_default_machine(); |
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if (machine == NULL) { |
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return;
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} |
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drive_init(opts, machine->use_scsi); |
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} |
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static void pc_system_flash_init(MemoryRegion *rom_memory, |
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DriveInfo *pflash_drv) |
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{ |
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BlockDriverState *bdrv; |
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int64_t size; |
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target_phys_addr_t phys_addr; |
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int sector_bits, sector_size;
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pflash_t *system_flash; |
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MemoryRegion *flash_mem; |
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bdrv = pflash_drv->bdrv; |
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size = bdrv_getlength(pflash_drv->bdrv); |
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sector_bits = 12;
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sector_size = 1 << sector_bits;
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if ((size % sector_size) != 0) { |
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fprintf(stderr, |
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"qemu: PC system firmware (pflash) must be a multiple of 0x%x\n",
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sector_size); |
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exit(1);
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} |
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phys_addr = 0x100000000ULL - size;
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system_flash = pflash_cfi01_register(phys_addr, NULL, "system.flash", size, |
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bdrv, sector_size, size >> sector_bits, |
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1, 0x0000, 0x0000, 0x0000, 0x0000, 0); |
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flash_mem = pflash_cfi01_get_memory(system_flash); |
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pc_isa_bios_init(rom_memory, flash_mem, size); |
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} |
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static void old_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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DriveInfo *pflash_drv; |
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PcSysFwDevice *sysfw_dev; |
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sysfw_dev = (PcSysFwDevice*) qdev_create(NULL, "pc-sysfw"); |
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if (sysfw_dev->rom_only) {
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old_pc_system_rom_init(rom_memory); |
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return;
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} |
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pflash_drv = drive_get(IF_PFLASH, 0, 0); |
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/* Currently KVM cannot execute from device memory.
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Use old rom based firmware initialization for KVM. */
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if (kvm_enabled()) {
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if (pflash_drv != NULL) { |
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fprintf(stderr, "qemu: pflash cannot be used with kvm enabled\n");
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exit(1);
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} else {
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sysfw_dev->rom_only = 1;
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old_pc_system_rom_init(rom_memory); |
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return;
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} |
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} |
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/* If a pflash drive is not found, then create one using
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the bios filename. */
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if (pflash_drv == NULL) { |
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pc_fw_add_pflash_drv(); |
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pflash_drv = drive_get(IF_PFLASH, 0, 0); |
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} |
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if (pflash_drv != NULL) { |
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pc_system_flash_init(rom_memory, pflash_drv); |
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} else {
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fprintf(stderr, "qemu: PC system firmware (pflash) not available\n");
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exit(1);
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} |
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} |
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static Property pcsysfw_properties[] = {
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DEFINE_PROP_UINT8("rom_only", PcSysFwDevice, rom_only, 0), |
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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static void pcsysfw_class_init (ObjectClass *klass, void *data) |
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{ |
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DeviceClass *dc = DEVICE_CLASS (klass); |
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dc->desc = "PC System Firmware";
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dc->props = pcsysfw_properties; |
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} |
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static TypeInfo pcsysfw_info = {
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.name = "pc-sysfw",
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.parent = TYPE_SYS_BUS_DEVICE, |
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.instance_size = sizeof (PcSysFwDevice),
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.class_init = pcsysfw_class_init, |
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}; |
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static void pcsysfw_register (void) |
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{ |
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type_register_static (&pcsysfw_info); |
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} |
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type_init (pcsysfw_register); |
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