diff options
Diffstat (limited to 'arch/x86/lib/coreboot/cb_sysinfo.c')
-rw-r--r-- | arch/x86/lib/coreboot/cb_sysinfo.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/arch/x86/lib/coreboot/cb_sysinfo.c b/arch/x86/lib/coreboot/cb_sysinfo.c new file mode 100644 index 0000000000..816a0efd13 --- /dev/null +++ b/arch/x86/lib/coreboot/cb_sysinfo.c @@ -0,0 +1,255 @@ +// 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/cb_sysinfo.h> +#include <asm/global_data.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; +} |