256 lines
6.1 KiB
C
256 lines
6.1 KiB
C
// SPDX-License-Identifier: BSD-3-Clause
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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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#include <common.h>
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#include <net.h>
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#include <asm/cb_sysinfo.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* This needs to be in the .data section so that it's copied over during
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* relocation. By default it's put in the .bss section which is simply filled
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* with zeroes when transitioning from "ROM", which is really RAM, to other
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* RAM.
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*/
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struct sysinfo_t lib_sysinfo __attribute__((section(".data")));
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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(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_memory *mem = (struct cb_memory *)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 =
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(struct cb_memory_range *)MEM_RANGE_PTR(mem, i);
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info->memrange[info->n_memranges].base =
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UNPACK_CB64(range->start);
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info->memrange[info->n_memranges].size =
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UNPACK_CB64(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(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_serial *ser = (struct cb_serial *)ptr;
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info->serial = ser;
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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 cb_vbnv *vbnv = (struct cb_vbnv *)ptr;
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info->vbnv_start = vbnv->vbnv_start;
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info->vbnv_size = vbnv->vbnv_size;
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}
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static void cb_parse_cbmem_entry(unsigned char *ptr, struct sysinfo_t *info)
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{
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struct cb_cbmem_entry *entry = (struct cb_cbmem_entry *)ptr;
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if (entry->id != CBMEM_ID_SMBIOS)
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return;
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info->smbios_start = entry->address;
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info->smbios_size = entry->entry_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 cb_vdat *vdat = (struct cb_vdat *) ptr;
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info->vdat_addr = vdat->vdat_addr;
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info->vdat_size = vdat->vdat_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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info->tstamp_table = ((struct cb_cbmem_tab *)ptr)->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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info->cbmem_cons = ((struct cb_cbmem_tab *)ptr)->cbmem_tab;
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}
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static void cb_parse_framebuffer(unsigned char *ptr, struct sysinfo_t *info)
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{
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info->framebuffer = (struct cb_framebuffer *)ptr;
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}
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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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__weak void cb_parse_unhandled(u32 tag, unsigned char *ptr)
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{
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}
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static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
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{
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unsigned char *ptr = addr;
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struct cb_header *header;
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int i;
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header = (struct cb_header *)ptr;
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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 (!ip_checksum_ok(header, sizeof(*header)))
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return -1;
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if (compute_ip_checksum(ptr + sizeof(*header), header->table_bytes) !=
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header->table_checksum)
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return -1;
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/* Now, walk the tables. */
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ptr += header->header_bytes;
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/* Inintialize some fields to sentinel values. */
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info->vbnv_start = info->vbnv_size = (uint32_t)(-1);
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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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return cb_parse_header(
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(void *)(unsigned long)
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((struct cb_forward *)rec)->forward,
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len, 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->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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/*
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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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*/
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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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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_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_VBNV:
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cb_parse_vbnv(ptr, info);
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break;
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case CB_TAG_CBMEM_ENTRY:
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cb_parse_cbmem_entry(ptr, info);
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break;
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default:
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cb_parse_unhandled(rec->tag, ptr);
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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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/* This is the x86 specific stuff. */
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int get_coreboot_info(struct sysinfo_t *info)
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{
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long addr;
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int ret;
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addr = locate_coreboot_table();
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if (addr < 0)
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return addr;
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ret = cb_parse_header((void *)addr, 0x1000, info);
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if (!ret)
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return -ENOENT;
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gd->arch.coreboot_table = addr;
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gd->flags |= GD_FLG_SKIP_LL_INIT;
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return 0;
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}
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