coreboot-kgpe-d16/payloads/libpayload/libc/coreboot.c

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/*
* 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);
}
#if IS_ENABLED(CONFIG_LP_CHROMEOS)
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];
}
#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_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;
}
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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;
}
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);
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;
#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;
#if IS_ENABLED(CONFIG_LP_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;
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;
#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_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;
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case CB_TAG_SPI_FLASH:
cb_parse_spi_flash(ptr, info);
break;
case CB_TAG_MTC:
cb_parse_mtc(ptr, info);
break;
default:
cb_parse_arch_specific(rec, info);
break;
}
ptr += rec->size;
}
return 0;
}