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1#ifndef _ASM_X86_MICROCODE_INTEL_H
2#define _ASM_X86_MICROCODE_INTEL_H
3
4#include <asm/microcode.h>
5
6struct microcode_header_intel {
7 unsigned int hdrver;
8 unsigned int rev;
9 unsigned int date;
10 unsigned int sig;
11 unsigned int cksum;
12 unsigned int ldrver;
13 unsigned int pf;
14 unsigned int datasize;
15 unsigned int totalsize;
16 unsigned int reserved[3];
17};
18
19struct microcode_intel {
20 struct microcode_header_intel hdr;
21 unsigned int bits[0];
22};
23
24/* microcode format is extended from prescott processors */
25struct extended_signature {
26 unsigned int sig;
27 unsigned int pf;
28 unsigned int cksum;
29};
30
31struct extended_sigtable {
32 unsigned int count;
33 unsigned int cksum;
34 unsigned int reserved[3];
35 struct extended_signature sigs[0];
36};
37
38#define DEFAULT_UCODE_DATASIZE (2000)
39#define MC_HEADER_SIZE (sizeof(struct microcode_header_intel))
40#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
41#define EXT_HEADER_SIZE (sizeof(struct extended_sigtable))
42#define EXT_SIGNATURE_SIZE (sizeof(struct extended_signature))
43
44#define get_totalsize(mc) \
45 (((struct microcode_intel *)mc)->hdr.datasize ? \
46 ((struct microcode_intel *)mc)->hdr.totalsize : \
47 DEFAULT_UCODE_TOTALSIZE)
48
49#define get_datasize(mc) \
50 (((struct microcode_intel *)mc)->hdr.datasize ? \
51 ((struct microcode_intel *)mc)->hdr.datasize : DEFAULT_UCODE_DATASIZE)
52
53#define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE)
54
55static inline u32 intel_get_microcode_revision(void)
56{
57 u32 rev, dummy;
58
59 native_wrmsrl(MSR_IA32_UCODE_REV, 0);
60
61 /* As documented in the SDM: Do a CPUID 1 here */
62 native_cpuid_eax(1);
63
64 /* get the current revision from MSR 0x8B */
65 native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev);
66
67 return rev;
68}
69
70#ifdef CONFIG_MICROCODE_INTEL
71extern void __init load_ucode_intel_bsp(void);
72extern void load_ucode_intel_ap(void);
73extern void show_ucode_info_early(void);
74extern int __init save_microcode_in_initrd_intel(void);
75void reload_ucode_intel(void);
76#else
77static inline __init void load_ucode_intel_bsp(void) {}
78static inline void load_ucode_intel_ap(void) {}
79static inline void show_ucode_info_early(void) {}
80static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
81static inline void reload_ucode_intel(void) {}
82#endif
83
84#endif /* _ASM_X86_MICROCODE_INTEL_H */