| 163,8 → 163,10 |
|---|
| # define CLOCK_TICK_RATE 1193180 /* Underlying HZ */ |
| #endif |
| |
| #define COUNTER_END 1000 |
| #define COUNTER_END 300 |
| |
| #define barrier() __asm__ __volatile__("" ::: "memory"); |
| |
| //TSC Calibration (idea from the linux kernel code) |
| void ll_calibrate_tsc(void) |
| { |
| 184,10 → 186,15 |
|---|
| outp(0x42,0xFF); /* LSB of count */ |
| outp(0x42,0xFF); /* MSB of count */ |
| |
| barrier(); |
| rdtscll(start); |
| barrier(); |
| outp(0x43,0x00); |
| start_8253 = inp(0x42); |
| start_8253 |= inp(0x42) << 8; |
| barrier(); |
| rdtscll(start); |
| barrier(); |
| |
| do { |
| |
| 197,6 → 204,10 |
|---|
| |
| } while (end_8253 > COUNTER_END); |
| |
| outp(0x43,0x00); |
| end_8253 = inp(0x42); |
| end_8253 |= inp(0x42) << 8; |
| |
| do { |
| |
| outp(0x43,0x00); |
| 203,8 → 214,12 |
|---|
| end_8253 = inp(0x42); |
| end_8253 |= inp(0x42) << 8; |
| |
| } while (end_8253 < COUNTER_END); |
| } while (end_8253 <= COUNTER_END); |
| |
| outp(0x43,0x00); |
| end_8253 = inp(0x42); |
| end_8253 |= inp(0x42) << 8; |
| |
| do { |
| |
| outp(0x43,0x00); |
| 213,10 → 228,15 |
|---|
| |
| } while (end_8253 > COUNTER_END); |
| |
| barrier(); |
| rdtscll(end); |
| barrier(); |
| outp(0x43,0x00); |
| end_8253 = inp(0x42); |
| end_8253 |= inp(0x42) << 8; |
| barrier(); |
| rdtscll(end); |
| barrier(); |
| |
| //Delta TSC |
| dtsc = end - start; |