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arm timer fix

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. set 'done' once initialized so 32-bit read frc works,
	  thanks to keesj
	. make sure the software-implemented upper 32 bit of the 64-bit
	  "tsc" value works OK by adding an assert in one of its calls

Change-Id: I5ce24fea919f4610c6a86ac7ec9f04b1815620c2
This commit is contained in:
Ben Gras 2013-06-19 11:39:05 +02:00
parent 718114d9b0
commit 8e7c0604bd
2 changed files with 4 additions and 0 deletions
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3
kernel/arch/earm/arch_clock.c
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@ -10,6 +10,8 @@
#include "kernel/glo.h"
#include "kernel/profile.h"
#include <assert.h>
#include "kernel/spinlock.h"
@ -61,6 +63,7 @@ void context_stop(struct proc * p)
u64_t * __tsc_ctr_switch = get_cpulocal_var_ptr(tsc_ctr_switch);
read_tsc_64(&tsc);
assert(tsc >= *__tsc_ctr_switch);
tsc_delta = tsc - *__tsc_ctr_switch;
p->p_cycles += tsc_delta;

1
kernel/arch/earm/omap_timer.c
View file

@ -198,6 +198,7 @@ void omap3_frclock_init(void)
/* Start timer */
mmio_set(fr_timer.base + fr_timer.regs->TCLR,
OMAP3_TCLR_OVF_TRG|OMAP3_TCLR_AR|OMAP3_TCLR_ST|OMAP3_TCLR_PRE);
done = 1;
}
void omap3_frclock_stop()