| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com> |
| * |
| * 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, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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. |
| */ |
| #ifndef __UPDATE_UCODE_H |
| #define __UPDATE_UCODE_H |
| |
| #include <console/console.h> |
| #include <cpu/cpu.h> |
| |
| #define MSR_IA32_BIOS_UPDT_TRIG 0x00000079 |
| #define MSR_IA32_BIOS_SIGN_ID 0x0000008b |
| #define MSR_UCODE_UPDATE_STATUS 0x00001205 |
| |
| #define NANO_UCODE_SIGNATURE 0x53415252 |
| #define NANO_UCODE_HEADER_SIZE 0x30 |
| |
| /* These are values returned by the CPU after we attempt microcode updates. |
| * We care what these values are exactly, so we define them to be sure */ |
| typedef enum { |
| UCODE_UPDATE_NOT_ATTEMPTED = 0x0, |
| UCODE_UPDATE_SUCCESS = 0x1, |
| UCODE_UPDATE_FAIL = 0x2, |
| UCODE_UPDATE_WRONG_CPU = 0x3, |
| UCODE_INVALID_UPDATE_BLOCK = 0x4, |
| } ucode_update_status; |
| |
| |
| typedef enum { |
| NANO_UCODE_VALID = 0, /* We only care that valid == 0 */ |
| NANO_UCODE_SIGNATURE_ERROR, |
| NANO_UCODE_WRONG_SIZE, |
| NANO_UCODE_CHECKSUM_FAIL, |
| } ucode_validity; |
| |
| typedef struct { |
| u32 signature; /* NANO_UCODE_SIGNATURE */ |
| u32 update_revision; /* Revision of the update header */ |
| u16 year; /* Year of patch release */ |
| u8 day; /* Day of patch release */ |
| u8 month; /* Month of patch release */ |
| u32 applicable_fms; /* Fam/model/stepping to which ucode applies */ |
| u32 checksum; /* Two's complement checksum of ucode+header */ |
| u32 loader_revision; /* Revision of hardware ucode update loader*/ |
| u32 rfu_1; /* Reserved for future use */ |
| u32 payload_size; /* Size of the ucode payload only */ |
| u32 total_size; /* Size of the ucode, including header */ |
| char name[8]; /* ASCII string of ucode filename */ |
| u32 rfu_2; /* Reserved for future use */ |
| /* First double-word of the ucode payload |
| * Its address represents the beginning of the ucode update we need to |
| * send to the CPU */ |
| u32 ucode_start; |
| |
| } nano_ucode_header; |
| |
| unsigned int nano_update_ucode(void); |
| |
| #endif /* __UPDATE_UCODE_H */ |