308 lines
8.4 KiB
C
308 lines
8.4 KiB
C
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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* Copyright (C) 2009 coresystems GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload-config.h>
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#include <libpayload.h>
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#include <coreboot_tables.h>
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/* This pointer gets set in head.S and is passed in from coreboot. */
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void *cb_header_ptr;
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/*
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* Some of this is x86 specific, and the rest of it is generic. Right now,
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* since we only support x86, we'll avoid trying to make lots of infrastructure
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* we don't need. If in the future, we want to use coreboot on some other
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* architecture, then take out the generic parsing code and move it elsewhere.
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*/
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/* === Parsing code === */
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/* This is the generic parsing code. */
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static void cb_parse_memory(void *ptr, struct sysinfo_t *info)
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{
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struct cb_memory *mem = ptr;
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int count = MEM_RANGE_COUNT(mem);
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int i;
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if (count > SYSINFO_MAX_MEM_RANGES)
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count = SYSINFO_MAX_MEM_RANGES;
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info->n_memranges = 0;
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for (i = 0; i < count; i++) {
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struct cb_memory_range *range = MEM_RANGE_PTR(mem, i);
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#ifdef CONFIG_LP_MEMMAP_RAM_ONLY
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if (range->type != CB_MEM_RAM)
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continue;
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#endif
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info->memrange[info->n_memranges].base =
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cb_unpack64(range->start);
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info->memrange[info->n_memranges].size =
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cb_unpack64(range->size);
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info->memrange[info->n_memranges].type = range->type;
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info->n_memranges++;
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}
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}
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static void cb_parse_serial(void *ptr, struct sysinfo_t *info)
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{
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info->serial = ((struct cb_serial *)ptr);
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}
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#ifdef CONFIG_LP_CHROMEOS
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static void cb_parse_vboot_handoff(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct lb_range *vbho = (struct lb_range *)ptr;
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info->vboot_handoff = (void *)(uintptr_t)vbho->range_start;
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info->vboot_handoff_size = vbho->range_size;
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}
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static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct lb_range *vbnv = (struct lb_range *)ptr;
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info->vbnv_start = vbnv->range_start;
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info->vbnv_size = vbnv->range_size;
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}
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static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info)
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{
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int i;
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struct cb_gpios *gpios = (struct cb_gpios *)ptr;
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info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ?
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(gpios->count) : SYSINFO_MAX_GPIOS;
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for (i = 0; i < info->num_gpios; i++)
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info->gpios[i] = gpios->gpios[i];
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}
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static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct lb_range *vdat = (struct lb_range *)ptr;
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info->vdat_addr = phys_to_virt(vdat->range_start);
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info->vdat_size = vdat->range_size;
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}
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#endif
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static void cb_parse_dma(unsigned char *ptr)
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{
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struct lb_range *dma = (struct lb_range *)ptr;
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init_dma_memory(phys_to_virt(dma->range_start), dma->range_size);
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}
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static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
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info->tstamp_table = phys_to_virt(cbmem->cbmem_tab);
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}
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static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
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info->cbmem_cons = phys_to_virt(cbmem->cbmem_tab);
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}
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static void cb_parse_mrc_cache(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
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info->mrc_cache = phys_to_virt(cbmem->cbmem_tab);
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}
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#ifdef CONFIG_LP_NVRAM
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static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info)
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{
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/* ptr points to a coreboot table entry and is already virtual */
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info->option_table = ptr;
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}
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static void cb_parse_checksum(void *ptr, struct sysinfo_t *info)
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{
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struct cb_cmos_checksum *cmos_cksum = ptr;
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info->cmos_range_start = cmos_cksum->range_start;
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info->cmos_range_end = cmos_cksum->range_end;
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info->cmos_checksum_location = cmos_cksum->location;
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}
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#endif
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#ifdef CONFIG_LP_COREBOOT_VIDEO_CONSOLE
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static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info)
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{
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/* ptr points to a coreboot table entry and is already virtual */
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info->framebuffer = ptr;
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}
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#endif
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static void cb_parse_string(unsigned char *ptr, char **info)
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{
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*info = (char *)((struct cb_string *)ptr)->string;
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}
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static int cb_parse_header(void *addr, struct sysinfo_t *info)
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{
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struct cb_header *header = addr;
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unsigned char *ptr = addr;
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void *forward;
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int i;
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/* No signature found. */
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if (strncmp((const char *)header->signature, "LBIO", 4))
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return -1;
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if (!header->table_bytes)
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return 0;
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/* Make sure the checksums match. */
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if (ipchksum((u16 *) header, sizeof(*header)) != 0)
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return -1;
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if (ipchksum((u16 *) (ptr + sizeof(*header)),
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header->table_bytes) != header->table_checksum)
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return -1;
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info->header = header;
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/* Now, walk the tables. */
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ptr += header->header_bytes;
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for (i = 0; i < header->table_entries; i++) {
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struct cb_record *rec = (struct cb_record *)ptr;
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/* We only care about a few tags here (maybe more later). */
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switch (rec->tag) {
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case CB_TAG_FORWARD:
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forward = phys_to_virt((void *)(unsigned long)((struct cb_forward *)rec)->forward);
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return cb_parse_header(forward, info);
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continue;
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case CB_TAG_MEMORY:
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cb_parse_memory(ptr, info);
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break;
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case CB_TAG_SERIAL:
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cb_parse_serial(ptr, info);
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break;
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case CB_TAG_VERSION:
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cb_parse_string(ptr, &info->cb_version);
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break;
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case CB_TAG_EXTRA_VERSION:
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cb_parse_string(ptr, &info->extra_version);
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break;
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case CB_TAG_BUILD:
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cb_parse_string(ptr, &info->build);
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break;
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case CB_TAG_COMPILE_TIME:
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cb_parse_string(ptr, &info->compile_time);
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break;
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case CB_TAG_COMPILE_BY:
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cb_parse_string(ptr, &info->compile_by);
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break;
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case CB_TAG_COMPILE_HOST:
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cb_parse_string(ptr, &info->compile_host);
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break;
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case CB_TAG_COMPILE_DOMAIN:
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cb_parse_string(ptr, &info->compile_domain);
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break;
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case CB_TAG_COMPILER:
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cb_parse_string(ptr, &info->compiler);
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break;
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case CB_TAG_LINKER:
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cb_parse_string(ptr, &info->linker);
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break;
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case CB_TAG_ASSEMBLER:
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cb_parse_string(ptr, &info->assembler);
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break;
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#ifdef CONFIG_LP_NVRAM
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case CB_TAG_CMOS_OPTION_TABLE:
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cb_parse_optiontable(ptr, info);
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break;
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case CB_TAG_OPTION_CHECKSUM:
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cb_parse_checksum(ptr, info);
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break;
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#endif
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#ifdef CONFIG_LP_COREBOOT_VIDEO_CONSOLE
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// FIXME we should warn on serial if coreboot set up a
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// framebuffer buf the payload does not know about it.
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case CB_TAG_FRAMEBUFFER:
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cb_parse_framebuffer(ptr, info);
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break;
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#endif
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case CB_TAG_MAINBOARD:
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info->mainboard = (struct cb_mainboard *)ptr;
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break;
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#ifdef CONFIG_LP_CHROMEOS
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case CB_TAG_GPIO:
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cb_parse_gpios(ptr, info);
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break;
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case CB_TAG_VDAT:
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cb_parse_vdat(ptr, info);
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break;
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case CB_TAG_VBNV:
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cb_parse_vbnv(ptr, info);
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break;
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case CB_TAG_VBOOT_HANDOFF:
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cb_parse_vboot_handoff(ptr, info);
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break;
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#endif
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case CB_TAG_DMA:
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cb_parse_dma(ptr);
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break;
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case CB_TAG_TIMESTAMPS:
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cb_parse_tstamp(ptr, info);
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break;
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case CB_TAG_CBMEM_CONSOLE:
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cb_parse_cbmem_cons(ptr, info);
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break;
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case CB_TAG_MRC_CACHE:
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cb_parse_mrc_cache(ptr, info);
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break;
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}
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ptr += rec->size;
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}
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return 1;
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}
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/* == Architecture specific == */
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/* FIXME put in actual address range */
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int get_coreboot_info(struct sysinfo_t *info)
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{
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int ret = cb_parse_header(cb_header_ptr, info);
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return (ret == 1) ? 0 : -1;
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}
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