diff options
Diffstat (limited to 'src/cpu/x86/tsc/delay_tsc.c')
| -rw-r--r-- | src/cpu/x86/tsc/delay_tsc.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/cpu/x86/tsc/delay_tsc.c b/src/cpu/x86/tsc/delay_tsc.c index 4a8fd5287e..27c89e3a94 100644 --- a/src/cpu/x86/tsc/delay_tsc.c +++ b/src/cpu/x86/tsc/delay_tsc.c @@ -10,7 +10,7 @@ static unsigned long clocks_per_usec; #if (CONFIG_TSC_X86RDTSC_CALIBRATE_WITH_TIMER2 == 1) #define CLOCK_TICK_RATE 1193180U /* Underlying HZ */ -/* ------ Calibrate the TSC ------- +/* ------ Calibrate the TSC ------- * Too much 64-bit arithmetic here to do this cleanly in C, and for * accuracy's sake we want to keep the overhead on the CTC speaker (channel 2) * output busy loop as low as possible. We avoid reading the CTC registers @@ -88,13 +88,13 @@ bad_ctc: * this is the "no timer2" version. * to calibrate tsc, we get a TSC reading, then do 1,000,000 outbs to port 0x80 * then we read TSC again, and divide the difference by 1,000,000 - * we have found on a wide range of machines that this gives us a a + * we have found on a wide range of machines that this gives us a a * good microsecond value * to +- 10%. On a dual AMD 1.6 Ghz box, it gives us .97 microseconds, and on a * 267 Mhz. p5, it gives us 1.1 microseconds. * also, since gcc now supports long long, we use that. * also no unsigned long long / operator, so we play games. - * about the only thing you can do with long longs, it seems, + * about the only thing you can do with long longs, it seems, *is return them and assign them. * (and do asm on them, yuck) * so avoid all ops on long longs. @@ -103,7 +103,7 @@ static unsigned long long calibrate_tsc(void) { unsigned long long start, end, delta; unsigned long result, count; - + printk(BIOS_SPEW, "Calibrating delay loop...\n"); start = rdtscll(); // no udivdi3 because we don't like libgcc. (only in x86emu) @@ -130,7 +130,7 @@ static unsigned long long calibrate_tsc(void) result = delta; printk(BIOS_SPEW, "end %llx, start %llx\n", end, start); printk(BIOS_SPEW, "32-bit delta %ld\n", (unsigned long) delta); - + printk(BIOS_SPEW, "%s 32-bit result is %ld\n", __func__, result); |