1cbc5b5f3SJordan Justen /* 2cbc5b5f3SJordan Justen * QEMU PC System Firmware 3cbc5b5f3SJordan Justen * 4cbc5b5f3SJordan Justen * Copyright (c) 2003-2004 Fabrice Bellard 5cbc5b5f3SJordan Justen * Copyright (c) 2011-2012 Intel Corporation 6cbc5b5f3SJordan Justen * 7cbc5b5f3SJordan Justen * Permission is hereby granted, free of charge, to any person obtaining a copy 8cbc5b5f3SJordan Justen * of this software and associated documentation files (the "Software"), to deal 9cbc5b5f3SJordan Justen * in the Software without restriction, including without limitation the rights 10cbc5b5f3SJordan Justen * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11cbc5b5f3SJordan Justen * copies of the Software, and to permit persons to whom the Software is 12cbc5b5f3SJordan Justen * furnished to do so, subject to the following conditions: 13cbc5b5f3SJordan Justen * 14cbc5b5f3SJordan Justen * The above copyright notice and this permission notice shall be included in 15cbc5b5f3SJordan Justen * all copies or substantial portions of the Software. 16cbc5b5f3SJordan Justen * 17cbc5b5f3SJordan Justen * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18cbc5b5f3SJordan Justen * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19cbc5b5f3SJordan Justen * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20cbc5b5f3SJordan Justen * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21cbc5b5f3SJordan Justen * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22cbc5b5f3SJordan Justen * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23cbc5b5f3SJordan Justen * THE SOFTWARE. 24cbc5b5f3SJordan Justen */ 25cbc5b5f3SJordan Justen 26b6a0aa05SPeter Maydell #include "qemu/osdep.h" 27da34e65cSMarkus Armbruster #include "qapi/error.h" 28fa1d36dfSMarkus Armbruster #include "sysemu/block-backend.h" 29b4a42f81SPaolo Bonzini #include "qemu/error-report.h" 3083c9f4caSPaolo Bonzini #include "hw/sysbus.h" 3183c9f4caSPaolo Bonzini #include "hw/hw.h" 320d09e41aSPaolo Bonzini #include "hw/i386/pc.h" 33bd183c79SJordan Justen #include "hw/boards.h" 3483c9f4caSPaolo Bonzini #include "hw/loader.h" 359c17d615SPaolo Bonzini #include "sysemu/sysemu.h" 360d09e41aSPaolo Bonzini #include "hw/block/flash.h" 379c17d615SPaolo Bonzini #include "sysemu/kvm.h" 38cbc5b5f3SJordan Justen 39cbc5b5f3SJordan Justen #define BIOS_FILENAME "bios.bin" 40cbc5b5f3SJordan Justen 4190ccf9f6SJordan Justen typedef struct PcSysFwDevice { 4290ccf9f6SJordan Justen SysBusDevice busdev; 43dade922fSJordan Justen uint8_t isapc_ram_fw; 4490ccf9f6SJordan Justen } PcSysFwDevice; 4590ccf9f6SJordan Justen 46bd183c79SJordan Justen static void pc_isa_bios_init(MemoryRegion *rom_memory, 47bd183c79SJordan Justen MemoryRegion *flash_mem, 48bd183c79SJordan Justen int ram_size) 49bd183c79SJordan Justen { 50bd183c79SJordan Justen int isa_bios_size; 51bd183c79SJordan Justen MemoryRegion *isa_bios; 52bd183c79SJordan Justen uint64_t flash_size; 53bd183c79SJordan Justen void *flash_ptr, *isa_bios_ptr; 54bd183c79SJordan Justen 55bd183c79SJordan Justen flash_size = memory_region_size(flash_mem); 56bd183c79SJordan Justen 57bd183c79SJordan Justen /* map the last 128KB of the BIOS in ISA space */ 587f87af39SMarkus Armbruster isa_bios_size = MIN(flash_size, 128 * 1024); 59bd183c79SJordan Justen isa_bios = g_malloc(sizeof(*isa_bios)); 60*98a99ce0SPeter Maydell memory_region_init_ram(isa_bios, NULL, "isa-bios", isa_bios_size, 61f8ed85acSMarkus Armbruster &error_fatal); 62bd183c79SJordan Justen memory_region_add_subregion_overlap(rom_memory, 63bd183c79SJordan Justen 0x100000 - isa_bios_size, 64bd183c79SJordan Justen isa_bios, 65bd183c79SJordan Justen 1); 66bd183c79SJordan Justen 67bd183c79SJordan Justen /* copy ISA rom image from top of flash memory */ 68bd183c79SJordan Justen flash_ptr = memory_region_get_ram_ptr(flash_mem); 69bd183c79SJordan Justen isa_bios_ptr = memory_region_get_ram_ptr(isa_bios); 70bd183c79SJordan Justen memcpy(isa_bios_ptr, 71bd183c79SJordan Justen ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size), 72bd183c79SJordan Justen isa_bios_size); 73bd183c79SJordan Justen 74bd183c79SJordan Justen memory_region_set_readonly(isa_bios, true); 75bd183c79SJordan Justen } 76bd183c79SJordan Justen 77637a5acbSLaszlo Ersek #define FLASH_MAP_UNIT_MAX 2 78637a5acbSLaszlo Ersek 79637a5acbSLaszlo Ersek /* We don't have a theoretically justifiable exact lower bound on the base 80637a5acbSLaszlo Ersek * address of any flash mapping. In practice, the IO-APIC MMIO range is 81637a5acbSLaszlo Ersek * [0xFEE00000..0xFEE01000[ -- see IO_APIC_DEFAULT_ADDRESS --, leaving free 82637a5acbSLaszlo Ersek * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in 83637a5acbSLaszlo Ersek * size. 84637a5acbSLaszlo Ersek */ 85637a5acbSLaszlo Ersek #define FLASH_MAP_BASE_MIN ((hwaddr)(0x100000000ULL - 8*1024*1024)) 86637a5acbSLaszlo Ersek 87637a5acbSLaszlo Ersek /* This function maps flash drives from 4G downward, in order of their unit 88637a5acbSLaszlo Ersek * numbers. The mapping starts at unit#0, with unit number increments of 1, and 89637a5acbSLaszlo Ersek * stops before the first missing flash drive, or before 90637a5acbSLaszlo Ersek * unit#FLASH_MAP_UNIT_MAX, whichever is reached first. 91637a5acbSLaszlo Ersek * 92637a5acbSLaszlo Ersek * Addressing within one flash drive is of course not reversed. 93637a5acbSLaszlo Ersek * 94637a5acbSLaszlo Ersek * An error message is printed and the process exits if: 95637a5acbSLaszlo Ersek * - the size of the backing file for a flash drive is non-positive, or not a 96637a5acbSLaszlo Ersek * multiple of the required sector size, or 97637a5acbSLaszlo Ersek * - the current mapping's base address would fall below FLASH_MAP_BASE_MIN. 98637a5acbSLaszlo Ersek * 99637a5acbSLaszlo Ersek * The drive with unit#0 (if available) is mapped at the highest address, and 100637a5acbSLaszlo Ersek * it is passed to pc_isa_bios_init(). Merging several drives for isa-bios is 101637a5acbSLaszlo Ersek * not supported. 102637a5acbSLaszlo Ersek */ 103637a5acbSLaszlo Ersek static void pc_system_flash_init(MemoryRegion *rom_memory) 104bd183c79SJordan Justen { 105637a5acbSLaszlo Ersek int unit; 106637a5acbSLaszlo Ersek DriveInfo *pflash_drv; 1074be74634SMarkus Armbruster BlockBackend *blk; 108bd183c79SJordan Justen int64_t size; 109637a5acbSLaszlo Ersek char *fatal_errmsg = NULL; 110637a5acbSLaszlo Ersek hwaddr phys_addr = 0x100000000ULL; 111bd183c79SJordan Justen int sector_bits, sector_size; 112bd183c79SJordan Justen pflash_t *system_flash; 113bd183c79SJordan Justen MemoryRegion *flash_mem; 114637a5acbSLaszlo Ersek char name[64]; 115bd183c79SJordan Justen 116bd183c79SJordan Justen sector_bits = 12; 117bd183c79SJordan Justen sector_size = 1 << sector_bits; 118bd183c79SJordan Justen 119637a5acbSLaszlo Ersek for (unit = 0; 120637a5acbSLaszlo Ersek (unit < FLASH_MAP_UNIT_MAX && 121637a5acbSLaszlo Ersek (pflash_drv = drive_get(IF_PFLASH, 0, unit)) != NULL); 122637a5acbSLaszlo Ersek ++unit) { 1234be74634SMarkus Armbruster blk = blk_by_legacy_dinfo(pflash_drv); 1244be74634SMarkus Armbruster size = blk_getlength(blk); 125637a5acbSLaszlo Ersek if (size < 0) { 126637a5acbSLaszlo Ersek fatal_errmsg = g_strdup_printf("failed to get backing file size"); 127637a5acbSLaszlo Ersek } else if (size == 0) { 128637a5acbSLaszlo Ersek fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " 129637a5acbSLaszlo Ersek "cannot have zero size"); 130637a5acbSLaszlo Ersek } else if ((size % sector_size) != 0) { 131637a5acbSLaszlo Ersek fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " 132637a5acbSLaszlo Ersek "must be a multiple of 0x%x", sector_size); 133637a5acbSLaszlo Ersek } else if (phys_addr < size || phys_addr - size < FLASH_MAP_BASE_MIN) { 134637a5acbSLaszlo Ersek fatal_errmsg = g_strdup_printf("oversized backing file, pflash " 135637a5acbSLaszlo Ersek "segments cannot be mapped under " 136637a5acbSLaszlo Ersek TARGET_FMT_plx, FLASH_MAP_BASE_MIN); 137637a5acbSLaszlo Ersek } 138637a5acbSLaszlo Ersek if (fatal_errmsg != NULL) { 139637a5acbSLaszlo Ersek Location loc; 140637a5acbSLaszlo Ersek 141637a5acbSLaszlo Ersek /* push a new, "none" location on the location stack; overwrite its 142637a5acbSLaszlo Ersek * contents with the location saved in the option; print the error 143637a5acbSLaszlo Ersek * (includes location); pop the top 144637a5acbSLaszlo Ersek */ 145637a5acbSLaszlo Ersek loc_push_none(&loc); 146637a5acbSLaszlo Ersek if (pflash_drv->opts != NULL) { 147637a5acbSLaszlo Ersek qemu_opts_loc_restore(pflash_drv->opts); 148637a5acbSLaszlo Ersek } 149637a5acbSLaszlo Ersek error_report("%s", fatal_errmsg); 150637a5acbSLaszlo Ersek loc_pop(&loc); 151637a5acbSLaszlo Ersek g_free(fatal_errmsg); 152bd183c79SJordan Justen exit(1); 153bd183c79SJordan Justen } 154bd183c79SJordan Justen 155637a5acbSLaszlo Ersek phys_addr -= size; 156bd183c79SJordan Justen 157637a5acbSLaszlo Ersek /* pflash_cfi01_register() creates a deep copy of the name */ 158637a5acbSLaszlo Ersek snprintf(name, sizeof name, "system.flash%d", unit); 159637a5acbSLaszlo Ersek system_flash = pflash_cfi01_register(phys_addr, NULL /* qdev */, name, 1604be74634SMarkus Armbruster size, blk, sector_size, 161637a5acbSLaszlo Ersek size >> sector_bits, 162637a5acbSLaszlo Ersek 1 /* width */, 163637a5acbSLaszlo Ersek 0x0000 /* id0 */, 164637a5acbSLaszlo Ersek 0x0000 /* id1 */, 165637a5acbSLaszlo Ersek 0x0000 /* id2 */, 166637a5acbSLaszlo Ersek 0x0000 /* id3 */, 167637a5acbSLaszlo Ersek 0 /* be */); 168637a5acbSLaszlo Ersek if (unit == 0) { 169637a5acbSLaszlo Ersek flash_mem = pflash_cfi01_get_memory(system_flash); 170bd183c79SJordan Justen pc_isa_bios_init(rom_memory, flash_mem, size); 171bd183c79SJordan Justen } 172637a5acbSLaszlo Ersek } 173637a5acbSLaszlo Ersek } 174bd183c79SJordan Justen 175dade922fSJordan Justen static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) 176cbc5b5f3SJordan Justen { 177cbc5b5f3SJordan Justen char *filename; 178cbc5b5f3SJordan Justen MemoryRegion *bios, *isa_bios; 179cbc5b5f3SJordan Justen int bios_size, isa_bios_size; 180cbc5b5f3SJordan Justen int ret; 181cbc5b5f3SJordan Justen 182cbc5b5f3SJordan Justen /* BIOS load */ 183cbc5b5f3SJordan Justen if (bios_name == NULL) { 184cbc5b5f3SJordan Justen bios_name = BIOS_FILENAME; 185cbc5b5f3SJordan Justen } 186cbc5b5f3SJordan Justen filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 187cbc5b5f3SJordan Justen if (filename) { 188cbc5b5f3SJordan Justen bios_size = get_image_size(filename); 189cbc5b5f3SJordan Justen } else { 190cbc5b5f3SJordan Justen bios_size = -1; 191cbc5b5f3SJordan Justen } 192cbc5b5f3SJordan Justen if (bios_size <= 0 || 193cbc5b5f3SJordan Justen (bios_size % 65536) != 0) { 194cbc5b5f3SJordan Justen goto bios_error; 195cbc5b5f3SJordan Justen } 196cbc5b5f3SJordan Justen bios = g_malloc(sizeof(*bios)); 197*98a99ce0SPeter Maydell memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal); 198dade922fSJordan Justen if (!isapc_ram_fw) { 199cbc5b5f3SJordan Justen memory_region_set_readonly(bios, true); 200dade922fSJordan Justen } 201cbc5b5f3SJordan Justen ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); 202cbc5b5f3SJordan Justen if (ret != 0) { 203cbc5b5f3SJordan Justen bios_error: 204cbc5b5f3SJordan Justen fprintf(stderr, "qemu: could not load PC BIOS '%s'\n", bios_name); 205cbc5b5f3SJordan Justen exit(1); 206cbc5b5f3SJordan Justen } 207cbc5b5f3SJordan Justen g_free(filename); 208cbc5b5f3SJordan Justen 209cbc5b5f3SJordan Justen /* map the last 128KB of the BIOS in ISA space */ 210cbc5b5f3SJordan Justen isa_bios_size = bios_size; 211cbc5b5f3SJordan Justen if (isa_bios_size > (128 * 1024)) { 212cbc5b5f3SJordan Justen isa_bios_size = 128 * 1024; 213cbc5b5f3SJordan Justen } 214cbc5b5f3SJordan Justen isa_bios = g_malloc(sizeof(*isa_bios)); 2152c9b15caSPaolo Bonzini memory_region_init_alias(isa_bios, NULL, "isa-bios", bios, 216cbc5b5f3SJordan Justen bios_size - isa_bios_size, isa_bios_size); 217cbc5b5f3SJordan Justen memory_region_add_subregion_overlap(rom_memory, 218cbc5b5f3SJordan Justen 0x100000 - isa_bios_size, 219cbc5b5f3SJordan Justen isa_bios, 220cbc5b5f3SJordan Justen 1); 221dade922fSJordan Justen if (!isapc_ram_fw) { 222cbc5b5f3SJordan Justen memory_region_set_readonly(isa_bios, true); 223dade922fSJordan Justen } 224cbc5b5f3SJordan Justen 225cbc5b5f3SJordan Justen /* map all the bios at the top of memory */ 226cbc5b5f3SJordan Justen memory_region_add_subregion(rom_memory, 227cbc5b5f3SJordan Justen (uint32_t)(-bios_size), 228cbc5b5f3SJordan Justen bios); 229cbc5b5f3SJordan Justen } 230cbc5b5f3SJordan Justen 2316dd2a5c9SPaolo Bonzini void pc_system_firmware_init(MemoryRegion *rom_memory, bool isapc_ram_fw) 232cbc5b5f3SJordan Justen { 233bd183c79SJordan Justen DriveInfo *pflash_drv; 2341d38574fSAnthony Liguori 235bd183c79SJordan Justen pflash_drv = drive_get(IF_PFLASH, 0, 0); 236bd183c79SJordan Justen 2376dd2a5c9SPaolo Bonzini if (isapc_ram_fw || pflash_drv == NULL) { 238dafb82e0SJordan Justen /* When a pflash drive is not found, use rom-mode */ 2396dd2a5c9SPaolo Bonzini old_pc_system_rom_init(rom_memory, isapc_ram_fw); 240a904410aSPaolo Bonzini return; 241a904410aSPaolo Bonzini } 242a904410aSPaolo Bonzini 243a904410aSPaolo Bonzini if (kvm_enabled() && !kvm_readonly_mem_enabled()) { 244dafb82e0SJordan Justen /* Older KVM cannot execute from device memory. So, flash memory 245dafb82e0SJordan Justen * cannot be used unless the readonly memory kvm capability is present. */ 246dafb82e0SJordan Justen fprintf(stderr, "qemu: pflash with kvm requires KVM readonly memory support\n"); 247dafb82e0SJordan Justen exit(1); 248dafb82e0SJordan Justen } 249dafb82e0SJordan Justen 250637a5acbSLaszlo Ersek pc_system_flash_init(rom_memory); 251cbc5b5f3SJordan Justen } 252