arch/x86/include/asm/microcode_intel.h

   1 #ifndef _ASM_X86_MICROCODE_INTEL_H
   2 #define _ASM_X86_MICROCODE_INTEL_H
   3
   4 #include <asm/microcode.h>
   5
   6 struct 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
  19 struct microcode_intel {
  20         struct microcode_header_intel hdr;
  21         unsigned int            bits[0];
  22 };
  23
  24 /* microcode format is extended from prescott processors */
  25 struct extended_signature {
  26         unsigned int            sig;
  27         unsigned int            pf;
  28         unsigned int            cksum;
  29 };
  30
  31 struct 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
  55 static 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
  71 extern void __init load_ucode_intel_bsp(void);
  72 extern void load_ucode_intel_ap(void);
  73 extern void show_ucode_info_early(void);
  74 extern int __init save_microcode_in_initrd_intel(void);
  75 void reload_ucode_intel(void);
  76 #else
  77 static inline __init void load_ucode_intel_bsp(void) {}
  78 static inline void load_ucode_intel_ap(void) {}
  79 static inline void show_ucode_info_early(void) {}
  80 static inline int __init save_microcode_in_initrd_intel(void) { return -EINVAL; }
  81 static inline void reload_ucode_intel(void) {}
  82 #endif
  83
  84 #endif /* _ASM_X86_MICROCODE_INTEL_H */