staging: brcm80211: decreased indentation level of brcms_c_wme_setparams function
[zen-stable.git] / arch / x86 / include / asm / pvclock.h
bloba518c0a4504465e6ac46068ba6d34a68d66a6fd3
1 #ifndef _ASM_X86_PVCLOCK_H
2 #define _ASM_X86_PVCLOCK_H
4 #include <linux/clocksource.h>
5 #include <asm/pvclock-abi.h>
7 /* some helper functions for xen and kvm pv clock sources */
8 cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src);
9 void pvclock_set_flags(u8 flags);
10 unsigned long pvclock_tsc_khz(struct pvclock_vcpu_time_info *src);
11 void pvclock_read_wallclock(struct pvclock_wall_clock *wall,
12 struct pvclock_vcpu_time_info *vcpu,
13 struct timespec *ts);
14 void pvclock_resume(void);
17 * Scale a 64-bit delta by scaling and multiplying by a 32-bit fraction,
18 * yielding a 64-bit result.
20 static inline u64 pvclock_scale_delta(u64 delta, u32 mul_frac, int shift)
22 u64 product;
23 #ifdef __i386__
24 u32 tmp1, tmp2;
25 #else
26 ulong tmp;
27 #endif
29 if (shift < 0)
30 delta >>= -shift;
31 else
32 delta <<= shift;
34 #ifdef __i386__
35 __asm__ (
36 "mul %5 ; "
37 "mov %4,%%eax ; "
38 "mov %%edx,%4 ; "
39 "mul %5 ; "
40 "xor %5,%5 ; "
41 "add %4,%%eax ; "
42 "adc %5,%%edx ; "
43 : "=A" (product), "=r" (tmp1), "=r" (tmp2)
44 : "a" ((u32)delta), "1" ((u32)(delta >> 32)), "2" (mul_frac) );
45 #elif defined(__x86_64__)
46 __asm__ (
47 "mul %[mul_frac] ; shrd $32, %[hi], %[lo]"
48 : [lo]"=a"(product),
49 [hi]"=d"(tmp)
50 : "0"(delta),
51 [mul_frac]"rm"((u64)mul_frac));
52 #else
53 #error implement me!
54 #endif
56 return product;
59 #endif /* _ASM_X86_PVCLOCK_H */