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arm: arch_timer: use u64/u32 for register data 

To ensure the correct size of types, use u64 for the return value of
arch_timer_get_cnt{p,v}ct, and u32 for arch_timer_rate, matching the
size of the registers these values are taken from. While we're changing
them anyway, simplify the implementation of arch_timer_get_cnt{p,v}ct.

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 14:49:27 +00:00
parent ef201de430
commit ef01c1d148
1 changed files with 11 additions and 19 deletions
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30
arch/arm/kernel/arch_timer.c
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@ -25,7 +25,7 @@
#include <asm/arch_timer.h>
#include <asm/sched_clock.h>
static unsigned long arch_timer_rate;
static u32 arch_timer_rate;
enum ppi_nr {
PHYS_SECURE_PPI,
@ -121,27 +121,18 @@ static inline u32 arch_timer_reg_read(const int access, const int reg)
return val;
}
static inline cycle_t arch_timer_counter_read(const int access)
static inline u64 arch_counter_get_cntpct(void)
{
cycle_t cval = 0;
if (access == ARCH_TIMER_PHYS_ACCESS)
asm volatile("mrrc p15, 0, %Q0, %R0, c14" : "=r" (cval));
if (access == ARCH_TIMER_VIRT_ACCESS)
asm volatile("mrrc p15, 1, %Q0, %R0, c14" : "=r" (cval));
u64 cval;
asm volatile("mrrc p15, 0, %Q0, %R0, c14" : "=r" (cval));
return cval;
}
static inline cycle_t arch_counter_get_cntpct(void)
static inline u64 arch_counter_get_cntvct(void)
{
return arch_timer_counter_read(ARCH_TIMER_PHYS_ACCESS);
}
static inline cycle_t arch_counter_get_cntvct(void)
{
return arch_timer_counter_read(ARCH_TIMER_VIRT_ACCESS);
u64 cval;
asm volatile("mrrc p15, 1, %Q0, %R0, c14" : "=r" (cval));
return cval;
}
static irqreturn_t inline timer_handler(const int access,
@ -259,7 +250,7 @@ static int __cpuinit arch_timer_setup(struct clock_event_device *clk)
static int arch_timer_available(void)
{
unsigned long freq;
u32 freq;
if (arch_timer_rate == 0) {
freq = arch_timer_reg_read(ARCH_TIMER_PHYS_ACCESS,
@ -275,7 +266,8 @@ static int arch_timer_available(void)
}
pr_info_once("Architected local timer running at %lu.%02luMHz (%s).\n",
arch_timer_rate / 1000000, (arch_timer_rate / 10000) % 100,
(unsigned long)arch_timer_rate / 1000000,
(unsigned long)(arch_timer_rate / 10000) % 100,
arch_timer_use_virtual ? "virt" : "phys");
return 0;
}