Merge branch 'include_refactor' of https://github.com/sitsofe/fio
[fio.git] / arch / arch-x86_64.h
1 #ifndef ARCH_X86_64_H
2 #define ARCH_X86_64_H
3
4 static inline void do_cpuid(unsigned int *eax, unsigned int *ebx,
5                             unsigned int *ecx, unsigned int *edx)
6 {
7         asm volatile("cpuid"
8                 : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
9                 : "0" (*eax), "2" (*ecx)
10                 : "memory");
11 }
12
13 #include "arch-x86-common.h" /* IWYU pragma: export */
14
15 #define FIO_ARCH        (arch_x86_64)
16
17 #define FIO_HUGE_PAGE           2097152
18
19 #define nop             __asm__ __volatile__("rep;nop": : :"memory")
20 #define read_barrier()  __asm__ __volatile__("lfence":::"memory")
21 #define write_barrier() __asm__ __volatile__("sfence":::"memory")
22
23 static inline unsigned long arch_ffz(unsigned long bitmask)
24 {
25         __asm__("bsf %1,%0" :"=r" (bitmask) :"r" (~bitmask));
26         return bitmask;
27 }
28
29 static inline unsigned long long get_cpu_clock(void)
30 {
31         unsigned int lo, hi;
32
33         __asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi));
34         return ((unsigned long long) hi << 32ULL) | lo;
35 }
36
37 #define ARCH_HAVE_FFZ
38 #define ARCH_HAVE_SSE4_2
39 #define ARCH_HAVE_CPU_CLOCK
40
41 #define RDRAND_LONG     ".byte 0x48,0x0f,0xc7,0xf0"
42 #define RDSEED_LONG     ".byte 0x48,0x0f,0xc7,0xf8"
43 #define RDRAND_RETRY    100
44
45 static inline int arch_rand_long(unsigned long *val)
46 {
47         int ok;
48
49         asm volatile("1: " RDRAND_LONG "\n\t"
50                      "jc 2f\n\t"
51                      "decl %0\n\t"
52                      "jnz 1b\n\t"
53                      "2:"
54                      : "=r" (ok), "=a" (*val)
55                      : "0" (RDRAND_RETRY));
56
57         return ok;
58 }
59
60 static inline int arch_rand_seed(unsigned long *seed)
61 {
62         unsigned char ok;
63
64         asm volatile(RDSEED_LONG "\n\t"
65                         "setc %0"
66                         : "=qm" (ok), "=a" (*seed));
67
68         return 0;
69 }
70
71 #endif