u-boot/arch/x86/cpu/coreboot/tables.c
Simon Glass 9ef168676c x86: Store the coreboot table address in global_data
At present this information is used to locate and parse the tables but is
not stored. Store it so that we can display it to the user, e.g. with the
'bdinfo' command.

Note that now the GD_FLG_SKIP_LL_INIT flag is set in get_coreboot_info(),
so it is always set when booting from coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
2020-07-17 14:32:24 +08:00

254 lines
6.1 KiB
C

// SPDX-License-Identifier: BSD-3-Clause
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2009 coresystems GmbH
*/
#include <common.h>
#include <net.h>
#include <asm/arch/sysinfo.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* 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_cbmem_entry(unsigned char *ptr, struct sysinfo_t *info)
{
struct cb_cbmem_entry *entry = (struct cb_cbmem_entry *)ptr;
if (entry->id != CBMEM_ID_SMBIOS)
return;
info->smbios_start = entry->address;
info->smbios_size = entry->entry_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;
}
__weak void cb_parse_unhandled(u32 tag, unsigned char *ptr)
{
}
static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
{
unsigned char *ptr = addr;
struct cb_header *header;
int i;
header = (struct cb_header *)ptr;
if (!header->table_bytes)
return 0;
/* Make sure the checksums match. */
if (!ip_checksum_ok(header, sizeof(*header)))
return -1;
if (compute_ip_checksum(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;
case CB_TAG_CBMEM_ENTRY:
cb_parse_cbmem_entry(ptr, info);
break;
default:
cb_parse_unhandled(rec->tag, ptr);
break;
}
ptr += rec->size;
}
return 1;
}
/* == Architecture specific == */
/* This is the x86 specific stuff. */
int get_coreboot_info(struct sysinfo_t *info)
{
long addr;
int ret;
addr = locate_coreboot_table();
if (addr < 0)
return addr;
ret = cb_parse_header((void *)addr, 0x1000, info);
if (!ret)
return -ENOENT;
gd->arch.coreboot_table = addr;
gd->flags |= GD_FLG_SKIP_LL_INIT;
return 0;
}