1#ifndef _ASM_X86_MICROCODE_H
2#define _ASM_X86_MICROCODE_H
3
4#define native_rdmsr(msr, val1, val2)			\
5do {							\
6	u64 __val = native_read_msr((msr));		\
7	(void)((val1) = (u32)__val);			\
8	(void)((val2) = (u32)(__val >> 32));		\
9} while (0)
10
11#define native_wrmsr(msr, low, high)			\
12	native_write_msr(msr, low, high)
13
14#define native_wrmsrl(msr, val)				\
15	native_write_msr((msr),				\
16			 (u32)((u64)(val)),		\
17			 (u32)((u64)(val) >> 32))
18
19struct cpu_signature {
20	unsigned int sig;
21	unsigned int pf;
22	unsigned int rev;
23};
24
25struct device;
26
27enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
28extern bool dis_ucode_ldr;
29
30struct microcode_ops {
31	enum ucode_state (*request_microcode_user) (int cpu,
32				const void __user *buf, size_t size);
33
34	enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
35						  bool refresh_fw);
36
37	void (*microcode_fini_cpu) (int cpu);
38
39	/*
40	 * The generic 'microcode_core' part guarantees that
41	 * the callbacks below run on a target cpu when they
42	 * are being called.
43	 * See also the "Synchronization" section in microcode_core.c.
44	 */
45	int (*apply_microcode) (int cpu);
46	int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
47};
48
49struct ucode_cpu_info {
50	struct cpu_signature	cpu_sig;
51	int			valid;
52	void			*mc;
53};
54extern struct ucode_cpu_info ucode_cpu_info[];
55
56#ifdef CONFIG_MICROCODE_INTEL
57extern struct microcode_ops * __init init_intel_microcode(void);
58#else
59static inline struct microcode_ops * __init init_intel_microcode(void)
60{
61	return NULL;
62}
63#endif /* CONFIG_MICROCODE_INTEL */
64
65#ifdef CONFIG_MICROCODE_AMD
66extern struct microcode_ops * __init init_amd_microcode(void);
67extern void __exit exit_amd_microcode(void);
68#else
69static inline struct microcode_ops * __init init_amd_microcode(void)
70{
71	return NULL;
72}
73static inline void __exit exit_amd_microcode(void) {}
74#endif
75
76#ifdef CONFIG_MICROCODE_EARLY
77#define MAX_UCODE_COUNT 128
78
79#define QCHAR(a, b, c, d) ((a) + ((b) << 8) + ((c) << 16) + ((d) << 24))
80#define CPUID_INTEL1 QCHAR('G', 'e', 'n', 'u')
81#define CPUID_INTEL2 QCHAR('i', 'n', 'e', 'I')
82#define CPUID_INTEL3 QCHAR('n', 't', 'e', 'l')
83#define CPUID_AMD1 QCHAR('A', 'u', 't', 'h')
84#define CPUID_AMD2 QCHAR('e', 'n', 't', 'i')
85#define CPUID_AMD3 QCHAR('c', 'A', 'M', 'D')
86
87#define CPUID_IS(a, b, c, ebx, ecx, edx)	\
88		(!((ebx ^ (a))|(edx ^ (b))|(ecx ^ (c))))
89
90/*
91 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
92 * x86_vendor() gets vendor id for BSP.
93 *
94 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
95 * coding, we still use x86_vendor() to get vendor id for AP.
96 *
97 * x86_vendor() gets vendor information directly from CPUID.
98 */
99static inline int x86_vendor(void)
100{
101	u32 eax = 0x00000000;
102	u32 ebx, ecx = 0, edx;
103
104	native_cpuid(&eax, &ebx, &ecx, &edx);
105
106	if (CPUID_IS(CPUID_INTEL1, CPUID_INTEL2, CPUID_INTEL3, ebx, ecx, edx))
107		return X86_VENDOR_INTEL;
108
109	if (CPUID_IS(CPUID_AMD1, CPUID_AMD2, CPUID_AMD3, ebx, ecx, edx))
110		return X86_VENDOR_AMD;
111
112	return X86_VENDOR_UNKNOWN;
113}
114
115static inline unsigned int __x86_family(unsigned int sig)
116{
117	unsigned int x86;
118
119	x86 = (sig >> 8) & 0xf;
120
121	if (x86 == 0xf)
122		x86 += (sig >> 20) & 0xff;
123
124	return x86;
125}
126
127static inline unsigned int x86_family(void)
128{
129	u32 eax = 0x00000001;
130	u32 ebx, ecx = 0, edx;
131
132	native_cpuid(&eax, &ebx, &ecx, &edx);
133
134	return __x86_family(eax);
135}
136
137static inline unsigned int x86_model(unsigned int sig)
138{
139	unsigned int x86, model;
140
141	x86 = __x86_family(sig);
142
143	model = (sig >> 4) & 0xf;
144
145	if (x86 == 0x6 || x86 == 0xf)
146		model += ((sig >> 16) & 0xf) << 4;
147
148	return model;
149}
150
151extern void __init load_ucode_bsp(void);
152extern void load_ucode_ap(void);
153extern int __init save_microcode_in_initrd(void);
154void reload_early_microcode(void);
155#else
156static inline void __init load_ucode_bsp(void) {}
157static inline void load_ucode_ap(void) {}
158static inline int __init save_microcode_in_initrd(void)
159{
160	return 0;
161}
162static inline void reload_early_microcode(void) {}
163#endif
164
165#endif /* _ASM_X86_MICROCODE_H */
166