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clocksource/drivers/arm_arch_timer: Extend write side of timer register accessors to u64 

The various accessors for the timer sysreg and MMIO registers are
currently hardwired to 32bit. However, we are about to introduce
the use of the CVAL registers, which require a 64bit access.

Upgrade the write side of the accessors to take a 64bit value
(the read side is left untouched as we don't plan to ever read
back any of these registers).

No functional change expected.

Reviewed-by: Oliver Upton <oupton@google.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211017124225.3018098-4-maz@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Marc Zyngier 2021-10-17 13:42:11 +01:00 committed by Daniel Lezcano
parent d72689988d
commit 1e8d929231
3 changed files with 11 additions and 11 deletions
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10
arch/arm/include/asm/arch_timer.h
View File

@ -24,15 +24,15 @@ int arch_timer_arch_init(void);
* the code. At least it does so with a recent GCC (4.6.3).
*/
static __always_inline
void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val)
void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u64 val)
{
if (access == ARCH_TIMER_PHYS_ACCESS) {
switch (reg) {
case ARCH_TIMER_REG_CTRL:
asm volatile("mcr p15, 0, %0, c14, c2, 1" : : "r" (val));
asm volatile("mcr p15, 0, %0, c14, c2, 1" : : "r" ((u32)val));
break;
case ARCH_TIMER_REG_TVAL:
asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" (val));
asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" ((u32)val));
break;
default:
BUILD_BUG();
@ -40,10 +40,10 @@ void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val)
} else if (access == ARCH_TIMER_VIRT_ACCESS) {
switch (reg) {
case ARCH_TIMER_REG_CTRL:
asm volatile("mcr p15, 0, %0, c14, c3, 1" : : "r" (val));
asm volatile("mcr p15, 0, %0, c14, c3, 1" : : "r" ((u32)val));
break;
case ARCH_TIMER_REG_TVAL:
asm volatile("mcr p15, 0, %0, c14, c3, 0" : : "r" (val));
asm volatile("mcr p15, 0, %0, c14, c3, 0" : : "r" ((u32)val));
break;
default:
BUILD_BUG();

2
arch/arm64/include/asm/arch_timer.h
View File

@ -89,7 +89,7 @@ static inline notrace u64 arch_timer_read_cntvct_el0(void)
* the code.
*/
static __always_inline
void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val)
void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u64 val)
{
if (access == ARCH_TIMER_PHYS_ACCESS) {
switch (reg) {

10
drivers/clocksource/arm_arch_timer.c
View File

@ -100,17 +100,17 @@ early_param("clocksource.arm_arch_timer.evtstrm", early_evtstrm_cfg);
*/
static __always_inline
void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val,
void arch_timer_reg_write(int access, enum arch_timer_reg reg, u64 val,
struct clock_event_device *clk)
{
if (access == ARCH_TIMER_MEM_PHYS_ACCESS) {
struct arch_timer *timer = to_arch_timer(clk);
switch (reg) {
case ARCH_TIMER_REG_CTRL:
writel_relaxed(val, timer->base + CNTP_CTL);
writel_relaxed((u32)val, timer->base + CNTP_CTL);
break;
case ARCH_TIMER_REG_TVAL:
writel_relaxed(val, timer->base + CNTP_TVAL);
writel_relaxed((u32)val, timer->base + CNTP_TVAL);
break;
default:
BUILD_BUG();
@ -119,10 +119,10 @@ void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val,
struct arch_timer *timer = to_arch_timer(clk);
switch (reg) {
case ARCH_TIMER_REG_CTRL:
writel_relaxed(val, timer->base + CNTV_CTL);
writel_relaxed((u32)val, timer->base + CNTV_CTL);
break;
case ARCH_TIMER_REG_TVAL:
writel_relaxed(val, timer->base + CNTV_TVAL);
writel_relaxed((u32)val, timer->base + CNTV_TVAL);
break;
default:
BUILD_BUG();