| /* |
| * QEMU PC System Firmware |
| * |
| * Copyright (c) 2003-2004 Fabrice Bellard |
| * Copyright (c) 2011-2012 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "sysemu/block-backend.h" |
| #include "qemu/error-report.h" |
| #include "hw/sysbus.h" |
| #include "hw/hw.h" |
| #include "hw/i386/pc.h" |
| #include "hw/boards.h" |
| #include "hw/loader.h" |
| #include "sysemu/sysemu.h" |
| #include "hw/block/flash.h" |
| #include "sysemu/kvm.h" |
| |
| #define BIOS_FILENAME "bios.bin" |
| |
| typedef struct PcSysFwDevice { |
| SysBusDevice busdev; |
| uint8_t isapc_ram_fw; |
| } PcSysFwDevice; |
| |
| static void pc_isa_bios_init(MemoryRegion *rom_memory, |
| MemoryRegion *flash_mem, |
| int ram_size) |
| { |
| int isa_bios_size; |
| MemoryRegion *isa_bios; |
| uint64_t flash_size; |
| void *flash_ptr, *isa_bios_ptr; |
| |
| flash_size = memory_region_size(flash_mem); |
| |
| /* map the last 128KB of the BIOS in ISA space */ |
| isa_bios_size = MIN(flash_size, 128 * 1024); |
| isa_bios = g_malloc(sizeof(*isa_bios)); |
| memory_region_init_ram(isa_bios, NULL, "isa-bios", isa_bios_size, |
| &error_fatal); |
| vmstate_register_ram_global(isa_bios); |
| memory_region_add_subregion_overlap(rom_memory, |
| 0x100000 - isa_bios_size, |
| isa_bios, |
| 1); |
| |
| /* copy ISA rom image from top of flash memory */ |
| flash_ptr = memory_region_get_ram_ptr(flash_mem); |
| isa_bios_ptr = memory_region_get_ram_ptr(isa_bios); |
| memcpy(isa_bios_ptr, |
| ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size), |
| isa_bios_size); |
| |
| memory_region_set_readonly(isa_bios, true); |
| } |
| |
| #define FLASH_MAP_UNIT_MAX 2 |
| |
| /* We don't have a theoretically justifiable exact lower bound on the base |
| * address of any flash mapping. In practice, the IO-APIC MMIO range is |
| * [0xFEE00000..0xFEE01000[ -- see IO_APIC_DEFAULT_ADDRESS --, leaving free |
| * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in |
| * size. |
| */ |
| #define FLASH_MAP_BASE_MIN ((hwaddr)(0x100000000ULL - 8*1024*1024)) |
| |
| /* This function maps flash drives from 4G downward, in order of their unit |
| * numbers. The mapping starts at unit#0, with unit number increments of 1, and |
| * stops before the first missing flash drive, or before |
| * unit#FLASH_MAP_UNIT_MAX, whichever is reached first. |
| * |
| * Addressing within one flash drive is of course not reversed. |
| * |
| * An error message is printed and the process exits if: |
| * - the size of the backing file for a flash drive is non-positive, or not a |
| * multiple of the required sector size, or |
| * - the current mapping's base address would fall below FLASH_MAP_BASE_MIN. |
| * |
| * The drive with unit#0 (if available) is mapped at the highest address, and |
| * it is passed to pc_isa_bios_init(). Merging several drives for isa-bios is |
| * not supported. |
| */ |
| static void pc_system_flash_init(MemoryRegion *rom_memory) |
| { |
| int unit; |
| DriveInfo *pflash_drv; |
| BlockBackend *blk; |
| int64_t size; |
| char *fatal_errmsg = NULL; |
| hwaddr phys_addr = 0x100000000ULL; |
| int sector_bits, sector_size; |
| pflash_t *system_flash; |
| MemoryRegion *flash_mem; |
| char name[64]; |
| |
| sector_bits = 12; |
| sector_size = 1 << sector_bits; |
| |
| for (unit = 0; |
| (unit < FLASH_MAP_UNIT_MAX && |
| (pflash_drv = drive_get(IF_PFLASH, 0, unit)) != NULL); |
| ++unit) { |
| blk = blk_by_legacy_dinfo(pflash_drv); |
| size = blk_getlength(blk); |
| if (size < 0) { |
| fatal_errmsg = g_strdup_printf("failed to get backing file size"); |
| } else if (size == 0) { |
| fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " |
| "cannot have zero size"); |
| } else if ((size % sector_size) != 0) { |
| fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " |
| "must be a multiple of 0x%x", sector_size); |
| } else if (phys_addr < size || phys_addr - size < FLASH_MAP_BASE_MIN) { |
| fatal_errmsg = g_strdup_printf("oversized backing file, pflash " |
| "segments cannot be mapped under " |
| TARGET_FMT_plx, FLASH_MAP_BASE_MIN); |
| } |
| if (fatal_errmsg != NULL) { |
| Location loc; |
| |
| /* push a new, "none" location on the location stack; overwrite its |
| * contents with the location saved in the option; print the error |
| * (includes location); pop the top |
| */ |
| loc_push_none(&loc); |
| if (pflash_drv->opts != NULL) { |
| qemu_opts_loc_restore(pflash_drv->opts); |
| } |
| error_report("%s", fatal_errmsg); |
| loc_pop(&loc); |
| g_free(fatal_errmsg); |
| exit(1); |
| } |
| |
| phys_addr -= size; |
| |
| /* pflash_cfi01_register() creates a deep copy of the name */ |
| snprintf(name, sizeof name, "system.flash%d", unit); |
| system_flash = pflash_cfi01_register(phys_addr, NULL /* qdev */, name, |
| size, blk, sector_size, |
| size >> sector_bits, |
| 1 /* width */, |
| 0x0000 /* id0 */, |
| 0x0000 /* id1 */, |
| 0x0000 /* id2 */, |
| 0x0000 /* id3 */, |
| 0 /* be */); |
| if (unit == 0) { |
| flash_mem = pflash_cfi01_get_memory(system_flash); |
| pc_isa_bios_init(rom_memory, flash_mem, size); |
| } |
| } |
| } |
| |
| static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) |
| { |
| char *filename; |
| MemoryRegion *bios, *isa_bios; |
| int bios_size, isa_bios_size; |
| int ret; |
| |
| /* BIOS load */ |
| if (bios_name == NULL) { |
| bios_name = BIOS_FILENAME; |
| } |
| filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); |
| if (filename) { |
| bios_size = get_image_size(filename); |
| } else { |
| bios_size = -1; |
| } |
| if (bios_size <= 0 || |
| (bios_size % 65536) != 0) { |
| goto bios_error; |
| } |
| bios = g_malloc(sizeof(*bios)); |
| memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal); |
| vmstate_register_ram_global(bios); |
| if (!isapc_ram_fw) { |
| memory_region_set_readonly(bios, true); |
| } |
| ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); |
| if (ret != 0) { |
| bios_error: |
| fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name); |
| exit(1); |
| } |
| g_free(filename); |
| |
| /* map the last 128KB of the BIOS in ISA space */ |
| isa_bios_size = bios_size; |
| if (isa_bios_size > (128 * 1024)) { |
| isa_bios_size = 128 * 1024; |
| } |
| isa_bios = g_malloc(sizeof(*isa_bios)); |
| memory_region_init_alias(isa_bios, NULL, "isa-bios", bios, |
| bios_size - isa_bios_size, isa_bios_size); |
| memory_region_add_subregion_overlap(rom_memory, |
| 0x100000 - isa_bios_size, |
| isa_bios, |
| 1); |
| if (!isapc_ram_fw) { |
| memory_region_set_readonly(isa_bios, true); |
| } |
| |
| /* map all the bios at the top of memory */ |
| memory_region_add_subregion(rom_memory, |
| (uint32_t)(-bios_size), |
| bios); |
| } |
| |
| void pc_system_firmware_init(MemoryRegion *rom_memory, bool isapc_ram_fw) |
| { |
| DriveInfo *pflash_drv; |
| |
| pflash_drv = drive_get(IF_PFLASH, 0, 0); |
| |
| if (isapc_ram_fw || pflash_drv == NULL) { |
| /* When a pflash drive is not found, use rom-mode */ |
| old_pc_system_rom_init(rom_memory, isapc_ram_fw); |
| return; |
| } |
| |
| if (kvm_enabled() && !kvm_readonly_mem_enabled()) { |
| /* Older KVM cannot execute from device memory. So, flash memory |
| * cannot be used unless the readonly memory kvm capability is present. */ |
| fprintf(stderr, "qemu: pflash with kvm requires KVM readonly memory support\n"); |
| exit(1); |
| } |
| |
| pc_system_flash_init(rom_memory); |
| } |
