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| author | Simon Glass <sjg@chromium.org> | 2013-04-17 16:13:36 +0000 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2013-05-13 13:33:21 -0700 |
| commit | e761ecdbb83e3151ffea5b531523256c57e62527 (patch) | |
| tree | cbd44285af8784933d8c09caba2f0f8208d1856b /arch/x86/cpu | |
| parent | 7949703a9582ec60cf841c595acd3bbe86933cd3 (diff) | |
| download | u-boot-imx-e761ecdbb83e3151ffea5b531523256c57e62527.zip u-boot-imx-e761ecdbb83e3151ffea5b531523256c57e62527.tar.gz u-boot-imx-e761ecdbb83e3151ffea5b531523256c57e62527.tar.bz2 | |
x86: Add TSC timer
This timer runs at a rate that can be calculated, well over 100MHz. It is
ideal for accurate timing and does not need interrupt servicing.
Tidy up some old broken and unneeded implementations at the same time.
To provide a consistent view of boot time, we use the same time
base as coreboot. Use the base timestamp supplied by coreboot
as U-Boot's base time.
Signed-off-by: Simon Glass <sjg@chromium.org>base
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu')
| -rw-r--r-- | arch/x86/cpu/coreboot/timestamp.c | 4 | ||||
| -rw-r--r-- | arch/x86/cpu/timer.c | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/cpu/coreboot/timestamp.c b/arch/x86/cpu/coreboot/timestamp.c index 2ca7a57..d26718e 100644 --- a/arch/x86/cpu/coreboot/timestamp.c +++ b/arch/x86/cpu/coreboot/timestamp.c @@ -39,7 +39,9 @@ static struct timestamp_table *ts_table __attribute__((section(".data"))); void timestamp_init(void) { ts_table = lib_sysinfo.tstamp_table; - timer_set_tsc_base(ts_table->base_time); +#ifdef CONFIG_SYS_X86_TSC_TIMER + timer_set_base(ts_table->base_time); +#endif timestamp_add_now(TS_U_BOOT_INITTED); } diff --git a/arch/x86/cpu/timer.c b/arch/x86/cpu/timer.c index 149109d..f95fce5 100644 --- a/arch/x86/cpu/timer.c +++ b/arch/x86/cpu/timer.c @@ -10,8 +10,11 @@ #include <common.h> +/* Temporary patch to maintain bisectability, removed in next commit */ +#ifndef CONFIG_SYS_X86_TSC_TIMER unsigned long timer_get_us(void) { printf("timer_get_us used but not implemented.\n"); return 0; } +#endif |