138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
/*
|
|
* This file is part of the libpayload project.
|
|
*
|
|
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
|
*
|
|
* 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.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(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);
|
|
|
|
if (range->type != CB_MEM_RAM)
|
|
continue;
|
|
|
|
info->memrange[info->n_memranges].base =
|
|
UNPACK_CB64(range->start);
|
|
|
|
info->memrange[info->n_memranges].size =
|
|
UNPACK_CB64(range->size);
|
|
|
|
info->n_memranges++;
|
|
}
|
|
}
|
|
|
|
static void cb_parse_serial(unsigned char *ptr, struct sysinfo_t *info)
|
|
{
|
|
struct cb_serial *ser = (struct cb_serial *)ptr;
|
|
info->ser_ioport = ser->ioport;
|
|
}
|
|
|
|
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;
|
|
|
|
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_MEMORY:
|
|
cb_parse_memory(ptr, info);
|
|
break;
|
|
case CB_TAG_SERIAL:
|
|
cb_parse_serial(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 *)0x0, 0x1000, info);
|
|
|
|
if (ret != 1)
|
|
ret = cb_parse_header((void *)0xf0000, 0x1000, info);
|
|
|
|
return (ret == 1) ? 0 : -1;
|
|
}
|