diff options
Diffstat (limited to 'src/cpu/via/nano/update_ucode.h')
| -rw-r--r-- | src/cpu/via/nano/update_ucode.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/cpu/via/nano/update_ucode.h b/src/cpu/via/nano/update_ucode.h new file mode 100644 index 0000000000..6a22d183a7 --- /dev/null +++ b/src/cpu/via/nano/update_ucode.h @@ -0,0 +1,73 @@ +/* + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#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; /* Reservod 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; /* Reservod 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 */ |