1 #ifndef _ASM_X86_MICROCODE_H
2 #define _ASM_X86_MICROCODE_H
5 #include <linux/earlycpio.h>
6 #include <linux/initrd.h>
8 #define native_rdmsr(msr, val1, val2) \
10 u64 __val = native_read_msr((msr)); \
11 (void)((val1) = (u32)__val); \
12 (void)((val2) = (u32)(__val >> 32)); \
15 #define native_wrmsr(msr, low, high) \
16 native_write_msr(msr, low, high)
18 #define native_wrmsrl(msr, val) \
19 native_write_msr((msr), \
21 (u32)((u64)(val) >> 32))
23 struct cpu_signature {
31 enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
33 struct microcode_ops {
34 enum ucode_state (*request_microcode_user) (int cpu,
35 const void __user *buf, size_t size);
37 enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
40 void (*microcode_fini_cpu) (int cpu);
43 * The generic 'microcode_core' part guarantees that
44 * the callbacks below run on a target cpu when they
46 * See also the "Synchronization" section in microcode_core.c.
48 int (*apply_microcode) (int cpu);
49 int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
52 struct ucode_cpu_info {
53 struct cpu_signature cpu_sig;
57 extern struct ucode_cpu_info ucode_cpu_info[];
59 #ifdef CONFIG_MICROCODE
60 int __init microcode_init(void);
62 static inline int __init microcode_init(void) { return 0; };
65 #ifdef CONFIG_MICROCODE_INTEL
66 extern struct microcode_ops * __init init_intel_microcode(void);
68 static inline struct microcode_ops * __init init_intel_microcode(void)
72 #endif /* CONFIG_MICROCODE_INTEL */
74 #ifdef CONFIG_MICROCODE_AMD
75 extern struct microcode_ops * __init init_amd_microcode(void);
76 extern void __exit exit_amd_microcode(void);
78 static inline struct microcode_ops * __init init_amd_microcode(void)
82 static inline void __exit exit_amd_microcode(void) {}
85 #define MAX_UCODE_COUNT 128
87 #define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
88 #define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
89 #define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
90 #define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
91 #define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
92 #define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
93 #define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
95 #define CPUID_IS(a, b, c, ebx, ecx, edx) \
96 (!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
99 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
100 * x86_cpuid_vendor() gets vendor id for BSP.
102 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
103 * coding, we still use x86_cpuid_vendor() to get vendor id for AP.
105 * x86_cpuid_vendor() gets vendor information directly from CPUID.
107 static inline int x86_cpuid_vendor(void)
109 u32 eax = 0x00000000;
110 u32 ebx, ecx = 0, edx;
112 native_cpuid(&eax, &ebx, &ecx, &edx);
114 if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
115 return X86_VENDOR_INTEL;
117 if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
118 return X86_VENDOR_AMD;
120 return X86_VENDOR_UNKNOWN;
123 static inline unsigned int x86_cpuid_family(void)
125 u32 eax = 0x00000001;
126 u32 ebx, ecx = 0, edx;
128 native_cpuid(&eax, &ebx, &ecx, &edx);
130 return x86_family(eax);
133 #ifdef CONFIG_MICROCODE
134 extern void __init load_ucode_bsp(void);
135 extern void load_ucode_ap(void);
136 extern int __init save_microcode_in_initrd(void);
137 void reload_early_microcode(void);
138 extern bool get_builtin_firmware(struct cpio_data *cd, const char *name);
140 static inline void __init load_ucode_bsp(void) { }
141 static inline void load_ucode_ap(void) { }
142 static inline int __init save_microcode_in_initrd(void) { return 0; }
143 static inline void reload_early_microcode(void) { }
145 get_builtin_firmware(struct cpio_data *cd, const char *name) { return false; }
148 static inline unsigned long get_initrd_start(void)
150 #ifdef CONFIG_BLK_DEV_INITRD
157 static inline unsigned long get_initrd_start_addr(void)
159 #ifdef CONFIG_BLK_DEV_INITRD
161 unsigned long *initrd_start_p = (unsigned long *)__pa_nodebug(&initrd_start);
163 return (unsigned long)__pa_nodebug(*initrd_start_p);
165 return get_initrd_start();
167 #else /* CONFIG_BLK_DEV_INITRD */
172 #endif /* _ASM_X86_MICROCODE_H */