arch/x86/include/asm/microcode.h

   1 #ifndef _ASM_X86_MICROCODE_H
   2 #define _ASM_X86_MICROCODE_H
   3
   4 struct cpu_signature {
   5         unsigned int sig;
   6         unsigned int pf;
   7         unsigned int rev;
   8 };
   9
  10 struct device;
  11
  12 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
  13
  14 struct microcode_ops {
  15         enum ucode_state (*request_microcode_user) (int cpu,
  16                                 const void __user *buf, size_t size);
  17
  18         enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
  19                                                   bool refresh_fw);
  20
  21         void (*microcode_fini_cpu) (int cpu);
  22
  23         /*
  24          * The generic 'microcode_core' part guarantees that
  25          * the callbacks below run on a target cpu when they
  26          * are being called.
  27          * See also the "Synchronization" section in microcode_core.c.
  28          */
  29         int (*apply_microcode) (int cpu);
  30         int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
  31 };
  32
  33 struct ucode_cpu_info {
  34         struct cpu_signature    cpu_sig;
  35         int                     valid;
  36         void                    *mc;
  37 };
  38 extern struct ucode_cpu_info ucode_cpu_info[];
  39
  40 #ifdef CONFIG_MICROCODE_INTEL
  41 extern struct microcode_ops * __init init_intel_microcode(void);
  42 #else
  43 static inline struct microcode_ops * __init init_intel_microcode(void)
  44 {
  45         return NULL;
  46 }
  47 #endif /* CONFIG_MICROCODE_INTEL */
  48
  49 #ifdef CONFIG_MICROCODE_AMD
  50 extern struct microcode_ops * __init init_amd_microcode(void);
  51 extern void __exit exit_amd_microcode(void);
  52 #else
  53 static inline struct microcode_ops * __init init_amd_microcode(void)
  54 {
  55         return NULL;
  56 }
  57 static inline void __exit exit_amd_microcode(void) {}
  58 #endif
  59
  60 #ifdef CONFIG_MICROCODE_EARLY
  61 #define MAX_UCODE_COUNT 128
  62 extern void __init load_ucode_bsp(void);
  63 extern void load_ucode_ap(void);
  64 extern int __init save_microcode_in_initrd(void);
  65 #else
  66 static inline void __init load_ucode_bsp(void) {}
  67 static inline void load_ucode_ap(void) {}
  68 static inline int __init save_microcode_in_initrd(void)
  69 {
  70         return 0;
  71 }
  72 #endif
  73
  74 #endif /* _ASM_X86_MICROCODE_H */