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Diffstat (limited to 'ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c')
-rw-r--r--ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c57
1 files changed, 25 insertions, 32 deletions
diff --git a/ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c b/ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c
index 18be580..96c43aa 100644
--- a/ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c
+++ b/ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.c
@@ -30,38 +30,32 @@ TimerConstructor (
VOID
)
{
- // Check if Timer 2 is already initialized
- if (MmioRead32(SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) {
- return RETURN_SUCCESS;
- } else {
- // configure SP810 to use 1MHz clock and disable
- MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
-
- // configure timer 2 for one shot operation, 32 bits, no prescaler, and interrupt disabled
- MmioOr32 (SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ONESHOT | SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
-
- // preload the timer count register
- MmioWrite32 (SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, 1);
+ // Check if Timer 2 is already initialized
+ if (MmioRead32(SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) {
+ return RETURN_SUCCESS;
+ } else {
+ // Configure timer 2 for one shot operation, 32 bits, no prescaler, and interrupt disabled
+ MmioOr32 (SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ONESHOT | SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
- // enable the timer
- MmioOr32 (SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
- }
+ // Preload the timer count register
+ MmioWrite32 (SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, 1);
- // Check if Timer 3 is already initialized
- if (MmioRead32(SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) {
- return RETURN_SUCCESS;
- } else {
- // configure SP810 to use 1MHz clock and disable
- MmioAndThenOr32 (SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER3_EN, SP810_SYS_CTRL_TIMER3_TIMCLK);
+ // Enable the timer
+ MmioOr32 (SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
+ }
- // configure timer 3 for free running operation, 32 bits, no prescaler, interrupt disabled
- MmioOr32 (SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
+ // Check if Timer 3 is already initialized
+ if (MmioRead32(SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG) & SP804_TIMER_CTRL_ENABLE) {
+ return RETURN_SUCCESS;
+ } else {
+ // Configure timer 3 for free running operation, 32 bits, no prescaler, interrupt disabled
+ MmioOr32 (SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
- // enable the timer
- MmioOr32 (SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
- }
+ // Enable the timer
+ MmioOr32 (SP804_TIMER3_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
+ }
- return RETURN_SUCCESS;
+ return RETURN_SUCCESS;
}
/**
@@ -141,11 +135,10 @@ GetPerformanceCounter (
{
// Free running 64-bit/32-bit counter is needed here.
// Don't think we need this to boot, just to do performance profile
- // ASSERT (FALSE);
- UINT32 val = MmioRead32 (SP804_TIMER3_BASE + SP804_TIMER_CURRENT_REG);
- ASSERT(val > 0);
-
- return (UINT64)val;
+ UINT64 Value;
+ Value = MmioRead32 (SP804_TIMER3_BASE + SP804_TIMER_CURRENT_REG);
+ ASSERT(Value > 0);
+ return Value;
}