/* * 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 #include #include #include /* * 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_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 = vdat->vdat_addr; info->vdat_size = vdat->vdat_size; } static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info) { info->tstamp_table = ((struct cb_cbmem_tab *)ptr)->cbmem_tab; } static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info) { info->cbmem_cons = ((struct cb_cbmem_tab *)ptr)->cbmem_tab; } static void cb_parse_framebuffer(unsigned char *ptr, struct sysinfo_t *info) { info->framebuffer = (struct cb_framebuffer *)ptr; } static void cb_parse_string(unsigned char *ptr, char **info) { *info = (char *)((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 = (unsigned char *)addr; 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; /* 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->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; /* * 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_GPIO: cb_parse_gpios(ptr, info); break; case CB_TAG_VDAT: cb_parse_vdat(ptr, info); 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_VBNV: cb_parse_vbnv(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((void *)0x00000000, 0x1000, info); if (ret != 1) ret = cb_parse_header((void *)0x000f0000, 0x1000, info); return (ret == 1) ? 0 : -1; }