| /* |
| * 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> |
| |
| /* |
| * 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_x86_rom_var_mtrr(void *ptr, struct sysinfo_t *info) |
| { |
| struct cb_x86_rom_mtrr *rom_mtrr = ptr; |
| info->x86_rom_var_mtrr_index = rom_mtrr->index; |
| } |
| |
| static void cb_parse_mrc_cache(void *ptr, struct sysinfo_t *info) |
| { |
| struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr; |
| info->mrc_cache = phys_to_virt(cbmem->cbmem_tab); |
| } |
| |
| int cb_parse_arch_specific(struct cb_record *rec, struct sysinfo_t *info) |
| { |
| switch(rec->tag) { |
| case CB_TAG_X86_ROM_MTRR: |
| cb_parse_x86_rom_var_mtrr(rec, info); |
| break; |
| case CB_TAG_MRC_CACHE: |
| cb_parse_mrc_cache(rec, info); |
| break; |
| default: |
| return 0; |
| } |
| return 1; |
| } |
| |
| int get_coreboot_info(struct sysinfo_t *info) |
| { |
| int ret; |
| |
| /* Ensure the variable range MTRR index covering the ROM is set to |
| * an invalid value. */ |
| info->x86_rom_var_mtrr_index = -1; |
| |
| ret = cb_parse_header(phys_to_virt(0x00000000), 0x1000, info); |
| |
| if (ret) |
| ret = cb_parse_header(phys_to_virt(0x000f0000), 0x1000, info); |
| |
| return ret; |
| } |