| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007 Advanced Micro Devices, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdint.h> |
| #include <console/console.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/amd/microcode.h> |
| #include <cbfs.h> |
| |
| #define UCODE_DEBUG(fmt, args...) \ |
| do { printk(BIOS_DEBUG, "[microcode] "fmt, ##args); } while(0) |
| |
| struct microcode { |
| u32 date_code; |
| u32 patch_id; |
| |
| u16 m_patch_data_id; |
| u8 m_patch_data_len; |
| u8 init_flag; |
| |
| u32 m_patch_data_cksum; |
| |
| u32 nb_dev_id; |
| u32 ht_io_hub_dev_id; |
| |
| u16 processor_rev_id; |
| u8 ht_io_hub_rev_id; |
| u8 nb_rev_id; |
| |
| u8 bios_api_rev; |
| u8 resv1[3]; |
| |
| u32 match_reg[8]; |
| |
| u8 m_patch_data[896]; |
| u8 resv2[896]; |
| |
| u8 x86_code_present; |
| u8 x86_code_entry[191]; |
| }; |
| |
| static void apply_microcode_patch(const struct microcode *m) |
| { |
| uint32_t new_patch_id; |
| msr_t msr; |
| |
| /* apply patch */ |
| msr.hi = 0; |
| msr.lo = (uint32_t)m; |
| |
| wrmsr(0xc0010020, msr); |
| |
| UCODE_DEBUG("patch id to apply = 0x%08x\n", m->patch_id); |
| |
| /* read the patch_id again */ |
| msr = rdmsr(0x8b); |
| new_patch_id = msr.lo; |
| |
| UCODE_DEBUG("updated to patch id = 0x%08x %s\n", new_patch_id , |
| (new_patch_id == m->patch_id) ? "success" : "fail"); |
| } |
| |
| static void amd_update_microcode(const void *ucode, size_t ucode_len, |
| uint32_t equivalent_processor_rev_id) |
| { |
| const struct microcode *m; |
| const void *c; |
| |
| for(m = c = ucode; m->date_code; m = c) { |
| if (m->processor_rev_id == equivalent_processor_rev_id) { |
| apply_microcode_patch(m); |
| break; |
| } |
| c += 2048; |
| } |
| } |
| |
| #define MICROCODE_CBFS_FILE "cpu_microcode_blob.bin" |
| |
| void amd_update_microcode_from_cbfs(u32 equivalent_processor_rev_id) |
| { |
| const void *ucode; |
| size_t ucode_len; |
| |
| if (equivalent_processor_rev_id == 0) { |
| UCODE_DEBUG("rev id not found. Skipping microcode patch!\n"); |
| return; |
| } |
| |
| ucode = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, MICROCODE_CBFS_FILE, |
| CBFS_TYPE_MICROCODE, &ucode_len); |
| if (!ucode) { |
| UCODE_DEBUG("microcode file not found. Skipping updates.\n"); |
| return; |
| } |
| |
| amd_update_microcode(ucode, ucode_len, equivalent_processor_rev_id); |
| } |