/* * This file is part of the libpayload project. * * Copyright (C) 2008 Advanced Micro Devices, Inc. * Copyright (C) 2009 coresystems GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <libpayload-config.h> #include <libpayload.h> #include <coreboot_tables.h> #include <stdint.h> /* * The code in this file applies to all coreboot architectures. Some coreboot * table tags are architecture specific, they are handled by their respective * cb_parse_arch_specific() functions. */ /* === Parsing code === */ /* This is the generic parsing code. */ static void cb_parse_memory(void *ptr, struct sysinfo_t *info) { struct cb_memory *mem = 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 = MEM_RANGE_PTR(mem, i); #if IS_ENABLED(CONFIG_LP_MEMMAP_RAM_ONLY) if (range->type != CB_MEM_RAM) continue; #endif info->memrange[info->n_memranges].base = cb_unpack64(range->start); info->memrange[info->n_memranges].size = cb_unpack64(range->size); info->memrange[info->n_memranges].type = range->type; info->n_memranges++; } } static void cb_parse_serial(void *ptr, struct sysinfo_t *info) { info->serial = ((struct cb_serial *)ptr); } 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_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 = phys_to_virt(vdat->range_start); 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(unsigned char *ptr, struct sysinfo_t *info) { struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; info->tstamp_table = phys_to_virt(cbmem->cbmem_tab); } static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info) { struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; info->cbmem_cons = phys_to_virt(cbmem->cbmem_tab); } 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 = phys_to_virt(cbmem->cbmem_tab); } 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; } #if IS_ENABLED(CONFIG_LP_NVRAM) 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; } #endif #if IS_ENABLED(CONFIG_LP_COREBOOT_VIDEO_CONSOLE) 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; } #endif 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 = phys_to_virt(cbmem->cbmem_tab); } 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 = phys_to_virt(cbmem->cbmem_tab); } #if IS_ENABLED(CONFIG_LP_TIMER_RDTSC) 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; } #endif int cb_parse_header(void *addr, int len, struct sysinfo_t *info) { struct cb_header *header; unsigned char *ptr = addr; void *forward; int i; for (i = 0; i < len; i += 16, ptr += 16) { header = (struct cb_header *)ptr; if (!strncmp((const char *)header->signature, "LBIO", 4)) break; } /* We walked the entire space and didn't find anything. */ if (i >= len) return -1; /* Make sure the checksums match. */ if (ipchksum((u16 *) header, sizeof(*header)) != 0) return -1; if (!header->table_bytes) return 0; if (ipchksum((u16 *) (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; 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: forward = phys_to_virt((void *)(unsigned long) ((struct cb_forward *)rec)->forward); return cb_parse_header(forward, len, info); 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; #if IS_ENABLED(CONFIG_LP_NVRAM) case CB_TAG_CMOS_OPTION_TABLE: cb_parse_optiontable(ptr, info); break; case CB_TAG_OPTION_CHECKSUM: cb_parse_checksum(ptr, info); break; #endif #if IS_ENABLED(CONFIG_LP_COREBOOT_VIDEO_CONSOLE) // 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; #endif 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_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; #if IS_ENABLED(CONFIG_LP_TIMER_RDTSC) case CB_TAG_TSC_INFO: cb_parse_tsc_info(ptr, info); break; #endif case CB_TAG_VPD: cb_parse_vpd(ptr, info); break; default: cb_parse_arch_specific(rec, info); break; } ptr += rec->size; } return 0; }