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arm: arch_timer: split cntfrq accessor

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The CNTFRQ register is not duplicated for physical and virtual timers,
and accessing it as if it were is confusing.

Instead, use a separate accessor which doesn't take the access type
as a parameter.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
This commit is contained in:
Mark Rutland 2012-11-12 16:46:40 +00:00
parent b8e243431f
commit fd5583a4c2
1 changed files with 9 additions and 7 deletions
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16
arch/arm/kernel/arch_timer.c
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@ -51,8 +51,7 @@ static bool arch_timer_use_virtual = true;
#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)
#define ARCH_TIMER_REG_CTRL 0
#define ARCH_TIMER_REG_FREQ 1
#define ARCH_TIMER_REG_TVAL 2
#define ARCH_TIMER_REG_TVAL 1
#define ARCH_TIMER_PHYS_ACCESS 0
#define ARCH_TIMER_VIRT_ACCESS 1
@ -101,9 +100,6 @@ static inline u32 arch_timer_reg_read(const int access, const int reg)
case ARCH_TIMER_REG_TVAL:
asm volatile("mrc p15, 0, %0, c14, c2, 0" : "=r" (val));
break;
case ARCH_TIMER_REG_FREQ:
asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val));
break;
}
}
@ -121,6 +117,13 @@ static inline u32 arch_timer_reg_read(const int access, const int reg)
return val;
}
static inline u32 arch_timer_get_cntfrq(void)
{
u32 val;
asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val));
return val;
}
static inline u64 arch_counter_get_cntpct(void)
{
u64 cval;
@ -253,8 +256,7 @@ static int arch_timer_available(void)
u32 freq;
if (arch_timer_rate == 0) {
freq = arch_timer_reg_read(ARCH_TIMER_PHYS_ACCESS,
ARCH_TIMER_REG_FREQ);
freq = arch_timer_get_cntfrq();
/* Check the timer frequency. */
if (freq == 0) {