microcode.h

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __CPU__INTEL__MICROCODE__
#define __CPU__INTEL__MICROCODE__
 
#include <stdint.h>
 
void intel_update_microcode_from_cbfs(void);
/* Find a microcode that matches the revision and platform family returning
 * NULL if none found. The found microcode is cached for faster access on
 * subsequent calls of this function.
 *
 * Since this function caches the found microcode (NULL or a valid microcode
 * pointer), it is expected to be run from BSP before starting any other APs.
 * It is not multithread safe otherwise. */
const void *intel_microcode_find(void);
 
/* It is up to the caller to determine if parallel loading is possible as
 * well as ensuring the microcode matches the family and revision (i.e. with
 * intel_microcode_find()). */
void intel_microcode_load_unlocked(const void *microcode_patch);
 
/* SoC specific check to determine if microcode update is really
 * required, will skip microcode update if true. */
int soc_skip_ucode_update(u32 current_patch_id, u32 new_patch_id);
 
/* return the version of the currently running microcode */
uint32_t get_current_microcode_rev(void);
 
/* extract microcode revision from the given patch */
uint32_t get_microcode_rev(const void *microcode);
/* extract microcode size from the given patch */
uint32_t get_microcode_size(const void *microcode);
/* extract checksum from the given patch */
uint32_t get_microcode_checksum(const void *microcode);
#endif