1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_MICROCODE_INTEL_H
3 #define _ASM_X86_MICROCODE_INTEL_H
5 #include <asm/microcode.h>
7 struct microcode_header_intel {
15 unsigned int datasize;
16 unsigned int totalsize;
17 unsigned int reserved[3];
20 struct microcode_intel {
21 struct microcode_header_intel hdr;
25 /* microcode format is extended from prescott processors */
26 struct extended_signature {
32 struct extended_sigtable {
35 unsigned int reserved[3];
36 struct extended_signature sigs[0];
39 #define DEFAULT_UCODE_DATASIZE (2000)
40 #define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
41 #define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
42 #define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
43 #define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
45 #define get_totalsize(mc) \
46 (((struct microcode_intel *)mc)->hdr.datasize ? \
47 ((struct microcode_intel *)mc)->hdr.totalsize : \
48 DEFAULT_UCODE_TOTALSIZE)
50 #define get_datasize(mc) \
51 (((struct microcode_intel *)mc)->hdr.datasize ? \
52 ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
54 #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
56 static inline u32 intel_get_microcode_revision(void)
60 native_wrmsrl(MSR_IA32_UCODE_REV, 0);
62 /* As documented in the SDM: Do a CPUID 1 here */
65 /* get the current revision from MSR 0x8B */
66 native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev);
71 #ifdef CONFIG_MICROCODE_INTEL
72 extern void __init load_ucode_intel_bsp(void);
73 extern void load_ucode_intel_ap(void);
74 extern void show_ucode_info_early(void);
75 extern int __init save_microcode_in_initrd_intel(void);
76 void reload_ucode_intel(void);
78 static inline __init void load_ucode_intel_bsp(void) {}
79 static inline void load_ucode_intel_ap(void) {}
80 static inline void show_ucode_info_early(void) {}
81 static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
82 static inline void reload_ucode_intel(void) {}
85 #endif /* _ASM_X86_MICROCODE_INTEL_H */