| 1 | /*␊ |
| 2 | * Copyright 2008 Islam Ahmed Zaid. All rights reserved. <azismed@gmail.com>␊ |
| 3 | */␊ |
| 4 | ␊ |
| 5 | #ifndef __LIBSAIO_FREQ_DETECT_H␊ |
| 6 | #define __LIBSAIO_FREQ_DETECT_H␊ |
| 7 | ␊ |
| 8 | #include "libsaio.h"␊ |
| 9 | #ifndef DEBUG_FREQ␊ |
| 10 | #define DEBUG_FREQ 0␊ |
| 11 | #endif␊ |
| 12 | ␊ |
| 13 | #if DEBUG_FREQ␊ |
| 14 | #define DBG(x...)␉printf(x)␊ |
| 15 | #else␊ |
| 16 | #define DBG(x...)␊ |
| 17 | #endif␊ |
| 18 | ␊ |
| 19 | /* Decimal powers: */␊ |
| 20 | #define kilo (1000ULL)␊ |
| 21 | #define Mega (kilo * kilo)␊ |
| 22 | #define Giga (kilo * Mega)␊ |
| 23 | #define Tera (kilo * Giga)␊ |
| 24 | #define Peta (kilo * Tera)␊ |
| 25 | ␊ |
| 26 | #define bit(n)␉␉␉(1ULL << (n))␊ |
| 27 | #define bitmask(h,l)␉((bit(h)|(bit(h)-1)) & ~(bit(l)-1))␊ |
| 28 | #define bitfield(x,h,l)␉(((x) & bitmask(h,l)) >> l)␊ |
| 29 | ␊ |
| 30 | #define␉IA32_PERF_STATUS␉0x198␊ |
| 31 | #define MSR_FLEX_RATIO␉␉0x194␊ |
| 32 | #define␉MSR_PLATFORM_INFO␉0xCE␊ |
| 33 | #define K8_FIDVID_STATUS␉0xC0010042␊ |
| 34 | #define K10_COFVID_STATUS␉0xC0010071␊ |
| 35 | ␊ |
| 36 | #define DEFAULT_FSB␉␉␉100000 /* for now, hardcoding 100MHz for old CPUs */␊ |
| 37 | ␊ |
| 38 | // DFE: This constant comes from older xnu:␊ |
| 39 | #define CLKNUM␉␉1193182␉␉/* formerly 1193167 */␊ |
| 40 | ␊ |
| 41 | // DFE: These two constants come from Linux except CLOCK_TICK_RATE replaced with CLKNUM␊ |
| 42 | #define CALIBRATE_TIME_MSEC 30 /* 30 msecs */␊ |
| 43 | #define CALIBRATE_LATCH␉\␊ |
| 44 | ␉((CLKNUM * CALIBRATE_TIME_MSEC + 1000/2)/1000)␊ |
| 45 | ␊ |
| 46 | extern uint64_t tscFrequency;␊ |
| 47 | extern uint64_t fsbFrequency;␊ |
| 48 | extern uint64_t cpuFrequency;␊ |
| 49 | ␊ |
| 50 | void calculate_freq(void);␊ |
| 51 | ␊ |
| 52 | static inline uint64_t rdtsc64(void)␊ |
| 53 | {␊ |
| 54 | ␉uint64_t ret;␊ |
| 55 | ␉__asm__ volatile("rdtsc" : "=A" (ret));␊ |
| 56 | ␉return ret;␊ |
| 57 | }␊ |
| 58 | ␊ |
| 59 | static inline uint64_t rdmsr64(uint32_t msr)␊ |
| 60 | {␊ |
| 61 | uint64_t ret;␊ |
| 62 | __asm__ volatile("rdmsr" : "=A" (ret) : "c" (msr));␊ |
| 63 | return ret;␊ |
| 64 | }␊ |
| 65 | ␊ |
| 66 | static inline void do_cpuid(uint32_t selector, uint32_t *data)␊ |
| 67 | {␊ |
| 68 | ␉asm volatile ("cpuid"␊ |
| 69 | ␉␉␉␉ : "=a" (data[0]),␊ |
| 70 | ␉␉␉␉ "=b" (data[1]),␊ |
| 71 | ␉␉␉␉ "=c" (data[2]),␊ |
| 72 | ␉␉␉␉ "=d" (data[3])␊ |
| 73 | ␉␉␉␉ : "a" (selector)␊ |
| 74 | ␉␉␉␉ );␊ |
| 75 | }␊ |
| 76 | ␊ |
| 77 | #endif /* !__LIBSAIO_FREQ_DETECT_H */␊ |
| 78 | |
