diff options
Diffstat (limited to 'arch/sparc/cpu/leon2/cpu_init.c')
| -rw-r--r-- | arch/sparc/cpu/leon2/cpu_init.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/sparc/cpu/leon2/cpu_init.c b/arch/sparc/cpu/leon2/cpu_init.c index de310fbbbb..6e07fe6bb4 100644 --- a/arch/sparc/cpu/leon2/cpu_init.c +++ b/arch/sparc/cpu/leon2/cpu_init.c @@ -13,6 +13,9 @@ #include <config.h> +#define TIMER_BASE_CLK 1000000 +#define US_PER_TICK (1000000 / CONFIG_SYS_HZ) + DECLARE_GLOBAL_DATA_PTR; /* reset CPU (jump to 0, without reset) */ @@ -90,7 +93,7 @@ void cpu_wait_ticks(unsigned long ticks) while (get_timer(start) < ticks) ; } -/* initiate and setup timer0 interrupt to 1MHz +/* initiate and setup timer0 interrupt to configured HZ. Base clock is 1MHz. * Return irq number for timer int or a negative number for * dealing with self */ @@ -98,28 +101,31 @@ int timer_interrupt_init_cpu(void) { LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS; - /* 1ms ticks */ + /* SYS_HZ ticks per second */ leon2->Timer_Counter_1 = 0; - leon2->Timer_Reload_1 = 999; /* (((1000000 / 100) - 1)) */ + leon2->Timer_Reload_1 = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1; leon2->Timer_Control_1 = (LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD); return LEON2_TIMER1_IRQNO; } +ulong get_tbclk(void) +{ + return TIMER_BASE_CLK; +} + /* * This function is intended for SHORT delays only. */ unsigned long cpu_usec2ticks(unsigned long usec) { - /* timer set to 1kHz ==> 1 clk tick = 1 msec */ - if (usec < 1000) + if (usec < US_PER_TICK) return 1; - return (usec / 1000); + return usec / US_PER_TICK; } unsigned long cpu_ticks2usec(unsigned long ticks) { - /* 1tick = 1usec */ - return ticks * 1000; + return ticks * US_PER_TICK; } |