| /* |
| * 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> |
| |
| /* |
| * 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(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); |
| |
| #ifdef CONFIG_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); |
| } |
| |
| #ifdef CONFIG_CHROMEOS |
| static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info) |
| { |
| struct cb_vbnv *vbnv = (struct cb_vbnv *)ptr; |
| |
| info->vbnv_start = vbnv->vbnv_start; |
| info->vbnv_size = vbnv->vbnv_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 cb_vdat *vdat = (struct cb_vdat *) ptr; |
| |
| info->vdat_addr = phys_to_virt(vdat->vdat_addr); |
| info->vdat_size = vdat->vdat_size; |
| } |
| #endif |
| |
| 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_mrc_cache(unsigned char *ptr, struct sysinfo_t *info) |
| { |
| struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; |
| info->mrc_cache = phys_to_virt(cbmem->cbmem_tab); |
| } |
| |
| #ifdef CONFIG_NVRAM |
| static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info) |
| { |
| 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 |
| |
| #ifdef CONFIG_COREBOOT_VIDEO_CONSOLE |
| static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info) |
| { |
| info->framebuffer = ptr; |
| } |
| #endif |
| |
| static void cb_parse_string(unsigned char *ptr, char **info) |
| { |
| *info = (char *)phys_to_virt(((struct cb_string *)ptr)->string); |
| } |
| |
| static 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; |
| |
| if (!header->table_bytes) |
| return 0; |
| |
| /* Make sure the checksums match. */ |
| if (ipchksum((u16 *) header, sizeof(*header)) != 0) |
| return -1; |
| |
| if (ipchksum((u16 *) (ptr + sizeof(*header)), |
| header->table_bytes) != header->table_checksum) |
| return -1; |
| |
| info->header = header; |
| |
| /* 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); |
| 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; |
| #ifdef CONFIG_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 |
| #ifdef CONFIG_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; |
| #ifdef CONFIG_CHROMEOS |
| 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; |
| #endif |
| 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_MRC_CACHE: |
| cb_parse_mrc_cache(ptr, info); |
| break; |
| } |
| |
| ptr += rec->size; |
| } |
| |
| return 1; |
| } |
| |
| /* == Architecture specific == */ |
| /* This is the x86 specific stuff. */ |
| |
| int get_coreboot_info(struct sysinfo_t *info) |
| { |
| int ret = cb_parse_header(phys_to_virt(0x00000000), 0x1000, info); |
| |
| if (ret != 1) |
| ret = cb_parse_header(phys_to_virt(0x000f0000), 0x1000, info); |
| |
| return (ret == 1) ? 0 : -1; |
| } |