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a4e1a86a TK |
1 | #ifndef ARCH_X86_64_H |
2 | #define ARCH_X86_64_H | |
ebac4655 | 3 | |
ebec344d JA |
4 | #ifndef __NR_sys_iosetup2 |
5 | #define __NR_sys_iosetup2 335 | |
6 | #endif | |
7 | ||
6b13c710 JA |
8 | static inline void do_cpuid(unsigned int *eax, unsigned int *ebx, |
9 | unsigned int *ecx, unsigned int *edx) | |
10 | { | |
11 | asm volatile("cpuid" | |
8afbf874 | 12 | : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) |
6b13c710 JA |
13 | : "0" (*eax), "2" (*ecx) |
14 | : "memory"); | |
15 | } | |
16 | ||
c473a9bd | 17 | #include "arch-x86-common.h" /* IWYU pragma: export */ |
fa80feae | 18 | |
cca84643 | 19 | #define FIO_ARCH (arch_x86_64) |
ebac4655 | 20 | |
cb25df61 JA |
21 | #define FIO_HUGE_PAGE 2097152 |
22 | ||
db6defc7 | 23 | #define nop __asm__ __volatile__("rep;nop": : :"memory") |
44c47feb JA |
24 | #define read_barrier() __asm__ __volatile__("lfence":::"memory") |
25 | #define write_barrier() __asm__ __volatile__("sfence":::"memory") | |
ebac4655 | 26 | |
0ce8b119 | 27 | static inline unsigned long arch_ffz(unsigned long bitmask) |
8f7e39dd | 28 | { |
0ce8b119 | 29 | __asm__("bsf %1,%0" :"=r" (bitmask) :"r" (~bitmask)); |
8f7e39dd JA |
30 | return bitmask; |
31 | } | |
c223da83 JA |
32 | |
33 | static inline unsigned long long get_cpu_clock(void) | |
34 | { | |
35 | unsigned int lo, hi; | |
36 | ||
37 | __asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi)); | |
38 | return ((unsigned long long) hi << 32ULL) | lo; | |
39 | } | |
40 | ||
21df44a2 | 41 | #define ARCH_HAVE_FFZ |
2f68124f | 42 | #define ARCH_HAVE_SSE4_2 |
c223da83 | 43 | #define ARCH_HAVE_CPU_CLOCK |
8f7e39dd | 44 | |
16dc0710 JA |
45 | #define RDRAND_LONG ".byte 0x48,0x0f,0xc7,0xf0" |
46 | #define RDSEED_LONG ".byte 0x48,0x0f,0xc7,0xf8" | |
47 | #define RDRAND_RETRY 100 | |
48 | ||
49 | static inline int arch_rand_long(unsigned long *val) | |
50 | { | |
51 | int ok; | |
52 | ||
53 | asm volatile("1: " RDRAND_LONG "\n\t" | |
54 | "jc 2f\n\t" | |
55 | "decl %0\n\t" | |
56 | "jnz 1b\n\t" | |
57 | "2:" | |
58 | : "=r" (ok), "=a" (*val) | |
59 | : "0" (RDRAND_RETRY)); | |
60 | ||
61 | return ok; | |
62 | } | |
63 | ||
64 | static inline int arch_rand_seed(unsigned long *seed) | |
65 | { | |
66 | unsigned char ok; | |
67 | ||
68 | asm volatile(RDSEED_LONG "\n\t" | |
69 | "setc %0" | |
70 | : "=qm" (ok), "=a" (*seed)); | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
ebac4655 | 75 | #endif |