diff options
Diffstat (limited to 'arch/x86/lib/coreboot')
| -rw-r--r-- | arch/x86/lib/coreboot/Makefile | 7 | ||||
| -rw-r--r-- | arch/x86/lib/coreboot/cb_support.c | 41 | ||||
| -rw-r--r-- | arch/x86/lib/coreboot/cb_sysinfo.c | 468 |
3 files changed, 516 insertions, 0 deletions
diff --git a/arch/x86/lib/coreboot/Makefile b/arch/x86/lib/coreboot/Makefile new file mode 100644 index 0000000..cb0ae1d --- /dev/null +++ b/arch/x86/lib/coreboot/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright 2021 Google LLC +# + +obj-y += cb_sysinfo.o +obj-y += cb_support.o diff --git a/arch/x86/lib/coreboot/cb_support.c b/arch/x86/lib/coreboot/cb_support.c new file mode 100644 index 0000000..ebb45cd --- /dev/null +++ b/arch/x86/lib/coreboot/cb_support.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Support for booting from coreboot + * + * Copyright 2021 Google LLC + */ + +#include <common.h> +#include <asm/cb_sysinfo.h> +#include <asm/e820.h> + +unsigned int cb_install_e820_map(unsigned int max_entries, + struct e820_entry *entries) +{ + unsigned int num_entries; + int i; + + num_entries = min((unsigned int)lib_sysinfo.n_memranges, max_entries); + if (num_entries < lib_sysinfo.n_memranges) { + printf("Warning: Limiting e820 map to %d entries\n", + num_entries); + } + for (i = 0; i < num_entries; i++) { + struct memrange *memrange = &lib_sysinfo.memrange[i]; + + entries[i].addr = memrange->base; + entries[i].size = memrange->size; + + /* + * coreboot has some extensions (type 6 & 16) to the E820 types. + * When we detect this, mark it as E820_RESERVED. + */ + if (memrange->type == CB_MEM_VENDOR_RSVD || + memrange->type == CB_MEM_TABLE) + entries[i].type = E820_RESERVED; + else + entries[i].type = memrange->type; + } + + return num_entries; +} diff --git a/arch/x86/lib/coreboot/cb_sysinfo.c b/arch/x86/lib/coreboot/cb_sysinfo.c new file mode 100644 index 0000000..e2c65bf --- /dev/null +++ b/arch/x86/lib/coreboot/cb_sysinfo.c @@ -0,0 +1,468 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2008 Advanced Micro Devices, Inc. + * Copyright (C) 2009 coresystems GmbH + */ + +#include <common.h> +#include <asm/cb_sysinfo.h> +#include <init.h> +#include <mapmem.h> +#include <net.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * This needs to be in the .data section so that it's copied over during + * relocation. By default it's put in the .bss section which is simply filled + * with zeroes when transitioning from "ROM", which is really RAM, to other + * RAM. + */ +struct sysinfo_t lib_sysinfo __attribute__((section(".data"))); + +/* + * Some of this is x86 specific, and the rest of it is generic. Right now, + * since we only support x86, we'll avoid trying to make lots of infrastructure + * we don't need. If in the future, we want to use coreboot on some other + * architecture, then take out the generic parsing code and move it elsewhere. + */ + +/* === Parsing code === */ +/* This is the generic parsing code */ + +static void cb_parse_memory(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_memory *mem = (struct cb_memory *)ptr; + int count = MEM_RANGE_COUNT(mem); + int i; + + if (count > SYSINFO_MAX_MEM_RANGES) + count = SYSINFO_MAX_MEM_RANGES; + + info->n_memranges = 0; + + for (i = 0; i < count; i++) { + struct cb_memory_range *range = + (struct cb_memory_range *)MEM_RANGE_PTR(mem, i); + + info->memrange[info->n_memranges].base = + UNPACK_CB64(range->start); + + info->memrange[info->n_memranges].size = + UNPACK_CB64(range->size); + + info->memrange[info->n_memranges].type = range->type; + + info->n_memranges++; + } +} + +static void cb_parse_serial(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_serial *ser = (struct cb_serial *)ptr; + + info->serial = ser; +} + +static void cb_parse_vboot_handoff(unsigned char *ptr, struct sysinfo_t *info) +{ + struct lb_range *vbho = (struct lb_range *)ptr; + + info->vboot_handoff = (void *)(uintptr_t)vbho->range_start; + info->vboot_handoff_size = vbho->range_size; +} + +static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info) +{ + struct lb_range *vbnv = (struct lb_range *)ptr; + + info->vbnv_start = vbnv->range_start; + info->vbnv_size = vbnv->range_size; +} + +static void cb_parse_cbmem_entry(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_entry *entry = (struct cb_cbmem_entry *)ptr; + + if (entry->id != CBMEM_ID_SMBIOS) + return; + + info->smbios_start = entry->address; + info->smbios_size = entry->entry_size; +} + +static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info) +{ + int i; + struct cb_gpios *gpios = (struct cb_gpios *)ptr; + + info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ? + (gpios->count) : SYSINFO_MAX_GPIOS; + + for (i = 0; i < info->num_gpios; i++) + info->gpios[i] = gpios->gpios[i]; +} + +static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info) +{ + struct lb_range *vdat = (struct lb_range *)ptr; + + info->vdat_addr = map_sysmem(vdat->range_start, vdat->range_size); + info->vdat_size = vdat->range_size; +} + +static void cb_parse_mac_addresses(unsigned char *ptr, + struct sysinfo_t *info) +{ + struct cb_macs *macs = (struct cb_macs *)ptr; + int i; + + info->num_macs = (macs->count < ARRAY_SIZE(info->macs)) ? + macs->count : ARRAY_SIZE(info->macs); + + for (i = 0; i < info->num_macs; i++) + info->macs[i] = macs->mac_addrs[i]; +} + +static void cb_parse_tstamp(void *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = ptr; + + info->tstamp_table = map_sysmem(cbmem->cbmem_tab, 0); +} + +static void cb_parse_cbmem_cons(void *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = ptr; + + info->cbmem_cons = map_sysmem(cbmem->cbmem_tab, 0); +} + +static void cb_parse_acpi_gnvs(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + + info->acpi_gnvs = map_sysmem(cbmem->cbmem_tab, 0); +} + +static void cb_parse_board_id(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_board_id *const cbbid = (struct cb_board_id *)ptr; + + info->board_id = cbbid->board_id; +} + +static void cb_parse_ram_code(unsigned char *ptr, struct sysinfo_t *info) +{ + struct cb_ram_code *const ram_code = (struct cb_ram_code *)ptr; + + info->ram_code = ram_code->ram_code; +} + +static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info) +{ + /* ptr points to a coreboot table entry and is already virtual */ + info->option_table = ptr; +} + +static void cb_parse_checksum(void *ptr, struct sysinfo_t *info) +{ + struct cb_cmos_checksum *cmos_cksum = ptr; + + info->cmos_range_start = cmos_cksum->range_start; + info->cmos_range_end = cmos_cksum->range_end; + info->cmos_checksum_location = cmos_cksum->location; +} + +static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info) +{ + /* ptr points to a coreboot table entry and is already virtual */ + info->framebuffer = ptr; +} + +static void cb_parse_string(unsigned char *ptr, char **info) +{ + *info = (char *)((struct cb_string *)ptr)->string; +} + +static void cb_parse_wifi_calibration(void *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + + info->wifi_calibration = map_sysmem(cbmem->cbmem_tab, 0); +} + +static void cb_parse_ramoops(void *ptr, struct sysinfo_t *info) +{ + struct lb_range *ramoops = (struct lb_range *)ptr; + + info->ramoops_buffer = ramoops->range_start; + info->ramoops_buffer_size = ramoops->range_size; +} + +static void cb_parse_mtc(void *ptr, struct sysinfo_t *info) +{ + struct lb_range *mtc = (struct lb_range *)ptr; + + info->mtc_start = mtc->range_start; + info->mtc_size = mtc->range_size; +} + +static void cb_parse_spi_flash(void *ptr, struct sysinfo_t *info) +{ + struct cb_spi_flash *flash = (struct cb_spi_flash *)ptr; + + info->spi_flash.size = flash->flash_size; + info->spi_flash.sector_size = flash->sector_size; + info->spi_flash.erase_cmd = flash->erase_cmd; +} + +static void cb_parse_boot_media_params(unsigned char *ptr, + struct sysinfo_t *info) +{ + struct cb_boot_media_params *const bmp = + (struct cb_boot_media_params *)ptr; + + info->fmap_offset = bmp->fmap_offset; + info->cbfs_offset = bmp->cbfs_offset; + info->cbfs_size = bmp->cbfs_size; + info->boot_media_size = bmp->boot_media_size; +} + +static void cb_parse_vpd(void *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + + info->chromeos_vpd = map_sysmem(cbmem->cbmem_tab, 0); +} + +static void cb_parse_tsc_info(void *ptr, struct sysinfo_t *info) +{ + const struct cb_tsc_info *tsc_info = ptr; + + if (tsc_info->freq_khz == 0) + return; + + /* Honor the TSC frequency passed to the payload */ + info->cpu_khz = tsc_info->freq_khz; +} + +static void cb_parse_x86_rom_var_mtrr(void *ptr, struct sysinfo_t *info) +{ + struct cb_x86_rom_mtrr *rom_mtrr = ptr; + + info->x86_rom_var_mtrr_index = rom_mtrr->index; +} + +static void cb_parse_mrc_cache(void *ptr, struct sysinfo_t *info) +{ + struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; + + info->mrc_cache = map_sysmem(cbmem->cbmem_tab, 0); +} + +__weak void cb_parse_unhandled(u32 tag, unsigned char *ptr) +{ +} + +static int cb_parse_header(void *addr, int len, struct sysinfo_t *info) +{ + unsigned char *ptr = addr; + struct cb_header *header; + int i; + + header = (struct cb_header *)ptr; + if (!header->table_bytes) + return 0; + + /* Make sure the checksums match */ + if (!ip_checksum_ok(header, sizeof(*header))) + return -1; + + if (compute_ip_checksum(ptr + sizeof(*header), header->table_bytes) != + header->table_checksum) + return -1; + + info->header = header; + + /* + * Board straps represented by numerical values are small numbers. + * Preset them to an invalid value in case the firmware does not + * supply the info. + */ + info->board_id = ~0; + info->ram_code = ~0; + + /* Now, walk the tables */ + ptr += header->header_bytes; + + /* Inintialize some fields to sentinel values */ + info->vbnv_start = info->vbnv_size = (uint32_t)(-1); + + for (i = 0; i < header->table_entries; i++) { + struct cb_record *rec = (struct cb_record *)ptr; + + /* We only care about a few tags here (maybe more later) */ + switch (rec->tag) { + case CB_TAG_FORWARD: + return cb_parse_header( + (void *)(unsigned long) + ((struct cb_forward *)rec)->forward, + len, info); + continue; + case CB_TAG_MEMORY: + cb_parse_memory(ptr, info); + break; + case CB_TAG_SERIAL: + cb_parse_serial(ptr, info); + break; + case CB_TAG_VERSION: + cb_parse_string(ptr, &info->cb_version); + break; + case CB_TAG_EXTRA_VERSION: + cb_parse_string(ptr, &info->extra_version); + break; + case CB_TAG_BUILD: + cb_parse_string(ptr, &info->build); + break; + case CB_TAG_COMPILE_TIME: + cb_parse_string(ptr, &info->compile_time); + break; + case CB_TAG_COMPILE_BY: + cb_parse_string(ptr, &info->compile_by); + break; + case CB_TAG_COMPILE_HOST: + cb_parse_string(ptr, &info->compile_host); + break; + case CB_TAG_COMPILE_DOMAIN: + cb_parse_string(ptr, &info->compile_domain); + break; + case CB_TAG_COMPILER: + cb_parse_string(ptr, &info->compiler); + break; + case CB_TAG_LINKER: + cb_parse_string(ptr, &info->linker); + break; + case CB_TAG_ASSEMBLER: + cb_parse_string(ptr, &info->assembler); + break; + case CB_TAG_CMOS_OPTION_TABLE: + cb_parse_optiontable(ptr, info); + break; + case CB_TAG_OPTION_CHECKSUM: + cb_parse_checksum(ptr, info); + break; + /* + * FIXME we should warn on serial if coreboot set up a + * framebuffer buf the payload does not know about it. + */ + case CB_TAG_FRAMEBUFFER: + cb_parse_framebuffer(ptr, info); + break; + case CB_TAG_MAINBOARD: + info->mainboard = (struct cb_mainboard *)ptr; + break; + case CB_TAG_GPIO: + cb_parse_gpios(ptr, info); + break; + case CB_TAG_VDAT: + cb_parse_vdat(ptr, info); + break; + case CB_TAG_VBNV: + cb_parse_vbnv(ptr, info); + break; + case CB_TAG_VBOOT_HANDOFF: + cb_parse_vboot_handoff(ptr, info); + break; + case CB_TAG_MAC_ADDRS: + cb_parse_mac_addresses(ptr, info); + break; + case CB_TAG_SERIALNO: + cb_parse_string(ptr, &info->serialno); + break; + case CB_TAG_TIMESTAMPS: + cb_parse_tstamp(ptr, info); + break; + case CB_TAG_CBMEM_CONSOLE: + cb_parse_cbmem_cons(ptr, info); + break; + case CB_TAG_ACPI_GNVS: + cb_parse_acpi_gnvs(ptr, info); + break; + case CB_TAG_CBMEM_ENTRY: + cb_parse_cbmem_entry(ptr, info); + break; + case CB_TAG_BOARD_ID: + cb_parse_board_id(ptr, info); + break; + case CB_TAG_RAM_CODE: + cb_parse_ram_code(ptr, info); + break; + case CB_TAG_WIFI_CALIBRATION: + cb_parse_wifi_calibration(ptr, info); + break; + case CB_TAG_RAM_OOPS: + cb_parse_ramoops(ptr, info); + break; + case CB_TAG_SPI_FLASH: + cb_parse_spi_flash(ptr, info); + break; + case CB_TAG_MTC: + cb_parse_mtc(ptr, info); + break; + case CB_TAG_BOOT_MEDIA_PARAMS: + cb_parse_boot_media_params(ptr, info); + break; + case CB_TAG_TSC_INFO: + cb_parse_tsc_info(ptr, info); + break; + case CB_TAG_VPD: + cb_parse_vpd(ptr, info); + break; + case CB_TAG_X86_ROM_MTRR: + cb_parse_x86_rom_var_mtrr(rec, info); + break; + case CB_TAG_MRC_CACHE: + cb_parse_mrc_cache(rec, info); + break; + default: + cb_parse_unhandled(rec->tag, ptr); + break; + } + + ptr += rec->size; + } + + return 1; +} + +/* == Architecture specific == */ +/* This is the x86 specific stuff */ + +int get_coreboot_info(struct sysinfo_t *info) +{ + long addr; + int ret; + + addr = locate_coreboot_table(); + if (addr < 0) + return addr; + ret = cb_parse_header((void *)addr, 0x1000, info); + if (!ret) + return -ENOENT; + gd->arch.coreboot_table = addr; + gd->flags |= GD_FLG_SKIP_LL_INIT; + + return 0; +} + +const struct sysinfo_t *cb_get_sysinfo(void) +{ + if (!ll_boot_init()) + return &lib_sysinfo; + + return NULL; +} |