66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __UPDATE_UCODE_H
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#define __UPDATE_UCODE_H
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#include <cpu/cpu.h>
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#define MSR_UCODE_UPDATE_STATUS 0x00001205
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#define NANO_UCODE_SIGNATURE 0x53415252
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#define NANO_UCODE_HEADER_SIZE 0x30
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/* These are values returned by the CPU after we attempt microcode updates.
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* We care what these values are exactly, so we define them to be sure */
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typedef enum {
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UCODE_UPDATE_NOT_ATTEMPTED = 0x0,
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UCODE_UPDATE_SUCCESS = 0x1,
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UCODE_UPDATE_FAIL = 0x2,
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UCODE_UPDATE_WRONG_CPU = 0x3,
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UCODE_INVALID_UPDATE_BLOCK = 0x4,
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} ucode_update_status;
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typedef enum {
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NANO_UCODE_VALID = 0, /* We only care that valid == 0 */
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NANO_UCODE_SIGNATURE_ERROR,
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NANO_UCODE_WRONG_SIZE,
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NANO_UCODE_CHECKSUM_FAIL,
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} ucode_validity;
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typedef struct {
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u32 signature; /* NANO_UCODE_SIGNATURE */
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u32 update_revision; /* Revision of the update header */
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u16 year; /* Year of patch release */
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u8 day; /* Day of patch release */
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u8 month; /* Month of patch release */
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u32 applicable_fms; /* Fam/model/stepping to which ucode applies */
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u32 checksum; /* Two's complement checksum of ucode+header */
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u32 loader_revision; /* Revision of hardware ucode update loader*/
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u32 rfu_1; /* Reserved for future use */
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u32 payload_size; /* Size of the ucode payload only */
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u32 total_size; /* Size of the ucode, including header */
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char name[8]; /* ASCII string of ucode filename */
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u32 rfu_2; /* Reserved for future use */
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/* First double-word of the ucode payload
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* Its address represents the beginning of the ucode update we need to
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* send to the CPU */
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u32 ucode_start;
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} nano_ucode_header;
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unsigned int nano_update_ucode(void);
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#endif /* __UPDATE_UCODE_H */
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