x86: Permit bootstage and timer data to be used prior to relocation
It is useful to be able to access the timer before U-Boot has relocated
so that we can fully support bootstage.
Add new global_data members to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/coreboot/coreboot.c b/arch/x86/cpu/coreboot/coreboot.c
index 9c9431e..f8e28f0 100644
--- a/arch/x86/cpu/coreboot/coreboot.c
+++ b/arch/x86/cpu/coreboot/coreboot.c
@@ -68,24 +68,21 @@
void show_boot_progress(int val)
{
#if MIN_PORT80_KCLOCKS_DELAY
- static uint32_t prev_stamp;
- static uint32_t base;
-
/*
* Scale the time counter reading to avoid using 64 bit arithmetics.
* Can't use get_timer() here becuase it could be not yet
* initialized or even implemented.
*/
- if (!prev_stamp) {
- base = rdtsc() / 1000;
- prev_stamp = 0;
+ if (!gd->arch.tsc_prev) {
+ gd->arch.tsc_base_kclocks = rdtsc() / 1000;
+ gd->arch.tsc_prev = 0;
} else {
uint32_t now;
do {
- now = rdtsc() / 1000 - base;
- } while (now < (prev_stamp + MIN_PORT80_KCLOCKS_DELAY));
- prev_stamp = now;
+ now = rdtsc() / 1000 - gd->arch.tsc_base_kclocks;
+ } while (now < (gd->arch.tsc_prev + MIN_PORT80_KCLOCKS_DELAY));
+ gd->arch.tsc_prev = now;
}
#endif
outb(val, 0x80);
diff --git a/arch/x86/cpu/interrupts.c b/arch/x86/cpu/interrupts.c
index dd30a05..6dc74e3 100644
--- a/arch/x86/cpu/interrupts.c
+++ b/arch/x86/cpu/interrupts.c
@@ -626,13 +626,12 @@
*/
u64 get_ticks(void)
{
- static u64 tick_base;
u64 now_tick = rdtsc();
- if (!tick_base)
- tick_base = now_tick;
+ if (!gd->arch.tsc_base)
+ gd->arch.tsc_base = now_tick;
- return now_tick - tick_base;
+ return now_tick - gd->arch.tsc_base;
}
#define PLATFORM_INFO_MSR 0xce