| /* |
| * This file is part of the coreboot project. |
| * |
| * 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; version 2 of the License. |
| * |
| * 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. |
| */ |
| |
| #include <string.h> |
| #include <swab.h> |
| #include <smbios.h> |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <arch/acpigen.h> |
| #include <commonlib/endian.h> |
| |
| #include "fw_cfg.h" |
| #include "fw_cfg_if.h" |
| |
| #define FW_CFG_PORT_CTL 0x0510 |
| #define FW_CFG_PORT_DATA 0x0511 |
| |
| static unsigned char fw_cfg_detected = 0xff; |
| static FWCfgFiles *fw_files; |
| |
| static int fw_cfg_present(void) |
| { |
| static const char qsig[] = "QEMU"; |
| unsigned char sig[4]; |
| |
| if (fw_cfg_detected == 0xff) { |
| fw_cfg_get(FW_CFG_SIGNATURE, sig, sizeof(sig)); |
| fw_cfg_detected = (memcmp(sig, qsig, 4) == 0) ? 1 : 0; |
| printk(BIOS_INFO, "QEMU: firmware config interface %s\n", |
| fw_cfg_detected ? "detected" : "not found"); |
| } |
| return fw_cfg_detected; |
| } |
| |
| static void fw_cfg_select(uint16_t entry) |
| { |
| outw(entry, FW_CFG_PORT_CTL); |
| } |
| |
| static void fw_cfg_read(void *dst, int dstlen) |
| { |
| insb(FW_CFG_PORT_DATA, dst, dstlen); |
| } |
| |
| void fw_cfg_get(uint16_t entry, void *dst, int dstlen) |
| { |
| fw_cfg_select(entry); |
| fw_cfg_read(dst, dstlen); |
| } |
| |
| static void fw_cfg_init_file(void) |
| { |
| u32 i, size, count = 0; |
| |
| if (fw_files != NULL) |
| return; |
| |
| fw_cfg_get(FW_CFG_FILE_DIR, &count, sizeof(count)); |
| count = swab32(count); |
| size = count * sizeof(FWCfgFile) + sizeof(count); |
| printk(BIOS_DEBUG, "QEMU: %d files in fw_cfg\n", count); |
| fw_files = malloc(size); |
| fw_cfg_get(FW_CFG_FILE_DIR, fw_files, size); |
| fw_files->count = swab32(fw_files->count); |
| for (i = 0; i < count; i++) { |
| fw_files->f[i].size = swab32(fw_files->f[i].size); |
| fw_files->f[i].select = swab16(fw_files->f[i].select); |
| printk(BIOS_DEBUG, "QEMU: %s [size=%d]\n", |
| fw_files->f[i].name, fw_files->f[i].size); |
| } |
| } |
| |
| static FWCfgFile *fw_cfg_find_file(const char *name) |
| { |
| int i; |
| |
| fw_cfg_init_file(); |
| for (i = 0; i < fw_files->count; i++) |
| if (strcmp(fw_files->f[i].name, name) == 0) |
| return fw_files->f + i; |
| return NULL; |
| } |
| |
| int fw_cfg_check_file(FWCfgFile *file, const char *name) |
| { |
| FWCfgFile *f; |
| if (!fw_cfg_present()) |
| return -1; |
| f = fw_cfg_find_file(name); |
| if (!f) |
| return -1; |
| *file = *f; |
| return 0; |
| } |
| |
| int fw_cfg_max_cpus(void) |
| { |
| unsigned short max_cpus; |
| |
| if (!fw_cfg_present()) |
| return -1; |
| |
| fw_cfg_get(FW_CFG_MAX_CPUS, &max_cpus, sizeof(max_cpus)); |
| return max_cpus; |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| |
| /* |
| * Starting with release 1.7 qemu provides ACPI tables via fw_cfg. |
| * Main advantage is that new (virtual) hardware which needs acpi |
| * support JustWorks[tm] without having to patch & update the firmware |
| * (seabios, coreboot, ...) accordingly. |
| * |
| * Qemu provides a etc/table-loader file with instructions for the |
| * firmware: |
| * - A "load" instruction to fetch ACPI data from fw_cfg. |
| * - A "pointer" instruction to patch a pointer. This is needed to |
| * get table-to-table references right, it is basically a |
| * primitive dynamic linker for ACPI tables. |
| * - A "checksum" instruction to generate ACPI table checksums. |
| * |
| * If a etc/table-loader file is found we'll go try loading the acpi |
| * tables from fw_cfg, otherwise we'll fallback to the ACPI tables |
| * compiled in. |
| */ |
| |
| #define BIOS_LINKER_LOADER_FILESZ 56 |
| |
| struct BiosLinkerLoaderEntry { |
| uint32_t command; |
| union { |
| /* |
| * COMMAND_ALLOCATE - allocate a table from @alloc.file |
| * subject to @alloc.align alignment (must be power of 2) |
| * and @alloc.zone (can be HIGH or FSEG) requirements. |
| * |
| * Must appear exactly once for each file, and before |
| * this file is referenced by any other command. |
| */ |
| struct { |
| char file[BIOS_LINKER_LOADER_FILESZ]; |
| uint32_t align; |
| uint8_t zone; |
| } alloc; |
| |
| /* |
| * COMMAND_ADD_POINTER - patch the table (originating from |
| * @dest_file) at @pointer.offset, by adding a pointer to the table |
| * originating from @src_file. 1,2,4 or 8 byte unsigned |
| * addition is used depending on @pointer.size. |
| */ |
| struct { |
| char dest_file[BIOS_LINKER_LOADER_FILESZ]; |
| char src_file[BIOS_LINKER_LOADER_FILESZ]; |
| uint32_t offset; |
| uint8_t size; |
| } pointer; |
| |
| /* |
| * COMMAND_ADD_CHECKSUM - calculate checksum of the range specified by |
| * @cksum_start and @cksum_length fields, |
| * and then add the value at @cksum.offset. |
| * Checksum simply sums -X for each byte X in the range |
| * using 8-bit math. |
| */ |
| struct { |
| char file[BIOS_LINKER_LOADER_FILESZ]; |
| uint32_t offset; |
| uint32_t start; |
| uint32_t length; |
| } cksum; |
| |
| /* padding */ |
| char pad[124]; |
| }; |
| } __packed; |
| typedef struct BiosLinkerLoaderEntry BiosLinkerLoaderEntry; |
| |
| enum { |
| BIOS_LINKER_LOADER_COMMAND_ALLOCATE = 0x1, |
| BIOS_LINKER_LOADER_COMMAND_ADD_POINTER = 0x2, |
| BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM = 0x3, |
| }; |
| |
| enum { |
| BIOS_LINKER_LOADER_ALLOC_ZONE_HIGH = 0x1, |
| BIOS_LINKER_LOADER_ALLOC_ZONE_FSEG = 0x2, |
| }; |
| |
| unsigned long fw_cfg_acpi_tables(unsigned long start) |
| { |
| FWCfgFile f; |
| BiosLinkerLoaderEntry *s; |
| unsigned long *addrs, current; |
| uint8_t *ptr; |
| int i, j, src, dst, max; |
| |
| if (fw_cfg_check_file(&f, "etc/table-loader")) |
| return 0; |
| |
| printk(BIOS_DEBUG, "QEMU: found ACPI tables in fw_cfg.\n"); |
| |
| max = f.size / sizeof(*s); |
| s = malloc(f.size); |
| addrs = malloc(max * sizeof(*addrs)); |
| fw_cfg_get(f.select, s, f.size); |
| |
| current = start; |
| for (i = 0; i < max && s[i].command != 0; i++) { |
| void *cksum_data; |
| uint32_t cksum; |
| uint32_t addr4; |
| uint64_t addr8; |
| switch (s[i].command) { |
| case BIOS_LINKER_LOADER_COMMAND_ALLOCATE: |
| current = ALIGN(current, s[i].alloc.align); |
| if (fw_cfg_check_file(&f, s[i].alloc.file)) |
| goto err; |
| |
| printk(BIOS_DEBUG, "QEMU: loading \"%s\" to 0x%lx (len %d)\n", |
| s[i].alloc.file, current, f.size); |
| fw_cfg_get(f.select, (void *)current, sizeof(current)); |
| addrs[i] = current; |
| current += f.size; |
| break; |
| |
| case BIOS_LINKER_LOADER_COMMAND_ADD_POINTER: |
| src = -1; dst = -1; |
| for (j = 0; j < i; j++) { |
| if (s[j].command != BIOS_LINKER_LOADER_COMMAND_ALLOCATE) |
| continue; |
| if (strcmp(s[j].alloc.file, s[i].pointer.dest_file) == 0) |
| dst = j; |
| if (strcmp(s[j].alloc.file, s[i].pointer.src_file) == 0) |
| src = j; |
| } |
| if (src == -1 || dst == -1) |
| goto err; |
| |
| switch (s[i].pointer.size) { |
| case 4: |
| ptr = (uint8_t *)addrs[dst]; |
| ptr += s[i].pointer.offset; |
| addr4 = read_le32(ptr); |
| addr4 += addrs[src]; |
| write_le32(ptr, addr4); |
| break; |
| |
| case 8: |
| ptr = (uint8_t *)addrs[dst]; |
| ptr += s[i].pointer.offset; |
| addr8 = read_le64(ptr); |
| addr8 += addrs[src]; |
| write_le64(ptr, addr8); |
| break; |
| |
| default: |
| /* |
| * Should not happen. ACPI knows 1 and 2 byte ptrs |
| * too, but we are operating with 32bit offsets which |
| * would simply not fit in there ... |
| */ |
| printk(BIOS_DEBUG, "QEMU: acpi: unimplemented ptr size %d\n", |
| s[i].pointer.size); |
| goto err; |
| } |
| break; |
| |
| case BIOS_LINKER_LOADER_COMMAND_ADD_CHECKSUM: |
| dst = -1; |
| for (j = 0; j < i; j++) { |
| if (s[j].command != BIOS_LINKER_LOADER_COMMAND_ALLOCATE) |
| continue; |
| if (strcmp(s[j].alloc.file, s[i].cksum.file) == 0) |
| dst = j; |
| } |
| if (dst == -1) |
| goto err; |
| |
| ptr = (uint8_t *)(addrs[dst] + s[i].cksum.offset); |
| cksum_data = (void *)(addrs[dst] + s[i].cksum.start); |
| cksum = acpi_checksum(cksum_data, s[i].cksum.length); |
| write_le8(ptr, cksum); |
| break; |
| |
| default: |
| printk(BIOS_DEBUG, "QEMU: acpi: unknown script cmd 0x%x @ %p\n", |
| s[i].command, s+i); |
| goto err; |
| }; |
| } |
| |
| printk(BIOS_DEBUG, "QEMU: loaded ACPI tables from fw_cfg.\n"); |
| free(s); |
| free(addrs); |
| return ALIGN(current, 16); |
| |
| err: |
| printk(BIOS_DEBUG, "QEMU: loading ACPI tables from fw_cfg failed.\n"); |
| free(s); |
| free(addrs); |
| return 0; |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| /* pick up smbios information from fw_cfg */ |
| |
| static const char *type1_manufacturer; |
| static const char *type1_product_name; |
| static const char *type1_version; |
| static const char *type1_serial_number; |
| static const char *type1_family; |
| static u8 type1_uuid[16]; |
| |
| static void fw_cfg_smbios_init(void) |
| { |
| static int done = 0; |
| uint16_t i, count = 0; |
| FwCfgSmbios entry; |
| char *buf; |
| |
| if (done) |
| return; |
| done = 1; |
| |
| fw_cfg_get(FW_CFG_SMBIOS_ENTRIES, &count, sizeof(count)); |
| for (i = 0; i < count; i++) { |
| insb(FW_CFG_PORT_DATA, &entry, sizeof(entry)); |
| buf = malloc(entry.length - sizeof(entry)); |
| insb(FW_CFG_PORT_DATA, buf, entry.length - sizeof(entry)); |
| if (entry.headertype == SMBIOS_FIELD_ENTRY && |
| entry.tabletype == 1) { |
| switch (entry.fieldoffset) { |
| case offsetof(struct smbios_type1, manufacturer): |
| type1_manufacturer = strdup(buf); |
| break; |
| case offsetof(struct smbios_type1, product_name): |
| type1_product_name = strdup(buf); |
| break; |
| case offsetof(struct smbios_type1, version): |
| type1_version = strdup(buf); |
| break; |
| case offsetof(struct smbios_type1, serial_number): |
| type1_serial_number = strdup(buf); |
| break; |
| case offsetof(struct smbios_type1, family): |
| type1_family = strdup(buf); |
| break; |
| case offsetof(struct smbios_type1, uuid): |
| memcpy(type1_uuid, buf, 16); |
| break; |
| } |
| } |
| free(buf); |
| } |
| } |
| |
| static unsigned long smbios_next(unsigned long current) |
| { |
| struct smbios_type0 *t0; |
| int l, count = 0; |
| char *s; |
| |
| t0 = (void*)current; |
| current += t0->length; |
| for (;;) { |
| s = (void*)current; |
| l = strlen(s); |
| if (!l) |
| return current + (count ? 1 : 2); |
| current += l + 1; |
| count++; |
| } |
| } |
| |
| /* |
| * Starting with version 2.1 qemu provides a full set of smbios tables |
| * for the virtual hardware emulated, except type 0 (bios information). |
| * |
| * What we are going to do here is find the type0 table, keep it, and |
| * override everything else generated by coreboot with the qemu smbios |
| * tables. |
| * |
| * It's a bit hackish, but qemu is a special case (compared to real |
| * hardware) and this way we don't need special qemu support in the |
| * generic smbios code. |
| */ |
| unsigned long fw_cfg_smbios_tables(int *handle, unsigned long *current) |
| { |
| FWCfgFile f; |
| struct smbios_type0 *t0; |
| unsigned long start, end; |
| int ret, i, count = 1; |
| char *str; |
| |
| if (fw_cfg_check_file(&f, "etc/smbios/smbios-tables")) |
| return 0; |
| |
| printk(BIOS_DEBUG, "QEMU: found smbios tables in fw_cfg (len %d).\n", f.size); |
| |
| /* |
| * Search backwards for "coreboot" (first string in type0 table, |
| * see src/arch/x86/boot/smbios.c), then find type0 table. |
| */ |
| for (i = 0; i < 16384; i++) { |
| str = (char*)(*current - i); |
| if (strcmp(str, "coreboot") == 0) |
| break; |
| } |
| if (i == 16384) |
| return 0; |
| i += sizeof(struct smbios_type0) - 2; |
| t0 = (struct smbios_type0*)(*current - i); |
| if (t0->type != SMBIOS_BIOS_INFORMATION || t0->handle != 0) |
| return 0; |
| printk(BIOS_DEBUG, "QEMU: coreboot type0 table found at 0x%lx.\n", |
| *current - i); |
| start = smbios_next(*current - i); |
| |
| /* |
| * Fetch smbios tables from qemu, go find the end marker. |
| * We'll exclude the end marker as coreboot will add one. |
| */ |
| printk(BIOS_DEBUG, "QEMU: loading smbios tables to 0x%lx\n", start); |
| fw_cfg_get(f.select, (void *)start, sizeof(start)); |
| end = start; |
| do { |
| t0 = (struct smbios_type0*)end; |
| if (t0->type == SMBIOS_END_OF_TABLE) |
| break; |
| end = smbios_next(end); |
| count++; |
| } while (end < start + f.size); |
| |
| /* final fixups. */ |
| ret = end - *current; |
| *current = end; |
| *handle = count; |
| return ret; |
| } |
| |
| const char *smbios_mainboard_manufacturer(void) |
| { |
| fw_cfg_smbios_init(); |
| return type1_manufacturer ?: CONFIG_MAINBOARD_SMBIOS_MANUFACTURER; |
| } |
| |
| const char *smbios_mainboard_product_name(void) |
| { |
| fw_cfg_smbios_init(); |
| return type1_product_name ?: CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME; |
| } |
| |
| const char *smbios_mainboard_version(void) |
| { |
| fw_cfg_smbios_init(); |
| return type1_version ?: CONFIG_MAINBOARD_VERSION; |
| } |
| |
| const char *smbios_mainboard_serial_number(void) |
| { |
| fw_cfg_smbios_init(); |
| return type1_serial_number ?: CONFIG_MAINBOARD_SERIAL_NUMBER; |
| } |
| |
| void smbios_mainboard_set_uuid(u8 *uuid) |
| { |
| fw_cfg_smbios_init(); |
| memcpy(uuid, type1_uuid, 16); |
| } |