diff options
Diffstat (limited to 'cpu/arm925t/interrupts.c')
| -rw-r--r-- | cpu/arm925t/interrupts.c | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/cpu/arm925t/interrupts.c b/cpu/arm925t/interrupts.c index 3ef4554..e5c77f7 100644 --- a/cpu/arm925t/interrupts.c +++ b/cpu/arm925t/interrupts.c @@ -35,29 +35,26 @@ #include <common.h> #include <arm925t.h> #include <configs/omap1510.h> +#include <asm/io.h> #define TIMER_LOAD_VAL 0xffffffff -/* macro to read the 32 bit timer */ -#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+8)) - -static ulong timestamp; -static ulong lastdec; +static uint32_t timestamp; +static uint32_t lastdec; /* nothing really to do with interrupts, just starts up a counter. */ int interrupt_init (void) { - int32_t val; - /* Start the decrementer ticking down from 0xffffffff */ - *((int32_t *) (CONFIG_SYS_TIMERBASE + LOAD_TIM)) = TIMER_LOAD_VAL; - val = MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | (CONFIG_SYS_PVT << MPUTIM_PTV_BIT); - *((int32_t *) (CONFIG_SYS_TIMERBASE + CNTL_TIMER)) = val; + __raw_writel(TIMER_LOAD_VAL, CONFIG_SYS_TIMERBASE + LOAD_TIM); + __raw_writel(MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | + (CONFIG_SYS_PTV << MPUTIM_PTV_BIT), + CONFIG_SYS_TIMERBASE + CNTL_TIMER); /* init the timestamp and lastdec value */ reset_timer_masked(); - return (0); + return 0; } /* @@ -84,17 +81,17 @@ void udelay (unsigned long usec) { ulong tmo, tmp; - if(usec >= 1000){ /* if "big" number, spread normalization to seconds */ + if (usec >= 1000) { /* if "big" number, spread normalization to seconds */ tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ + tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ tmo /= 1000; /* finish normalize. */ - }else{ /* else small number, don't kill it prior to HZ multiply */ + } else { /* else small number, don't kill it prior to HZ multiply */ tmo = usec * CONFIG_SYS_HZ; tmo /= (1000*1000); } tmp = get_timer (0); /* get current timestamp */ - if( (tmo + tmp + 1) < tmp ) /* if setting this fordward will roll time stamp */ + if ((tmo + tmp + 1) < tmp) /* if setting this fordward will roll time stamp */ reset_timer_masked (); /* reset "advancing" timestamp to 0, set lastdec value */ else tmo += tmp; /* else, set advancing stamp wake up time */ @@ -106,13 +103,13 @@ void udelay (unsigned long usec) void reset_timer_masked (void) { /* reset time */ - lastdec = READ_TIMER; /* capure current decrementer value time */ + lastdec = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM); timestamp = 0; /* start "advancing" time stamp from 0 */ } ulong get_timer_masked (void) { - ulong now = READ_TIMER; /* current tick value */ + uint32_t now = __raw_readl(CONFIG_SYS_TIMERBASE + READ_TIM); if (lastdec >= now) { /* normal mode (non roll) */ /* normal mode */ @@ -136,7 +133,7 @@ void udelay_masked (unsigned long usec) #ifdef CONFIG_INNOVATOROMAP1510 #define LOOPS_PER_MSEC 60 /* tuned on omap1510 */ volatile int i, time_remaining = LOOPS_PER_MSEC*usec; - for (i=time_remaining; i>0; i--) { } + for (i=time_remaining; i>0; i--) { } #else ulong tmo; @@ -145,7 +142,7 @@ void udelay_masked (unsigned long usec) if (usec >= 1000) { /* if "big" number, spread normalization to seconds */ tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ - tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ + tmo *= CONFIG_SYS_HZ; /* find number of "ticks" to wait to achieve target */ tmo /= 1000; /* finish normalize. */ } else { /* else small number, don't kill it prior to HZ multiply */ tmo = usec * CONFIG_SYS_HZ; @@ -176,8 +173,5 @@ unsigned long long get_ticks(void) */ ulong get_tbclk (void) { - ulong tbclk; - - tbclk = CONFIG_SYS_HZ; - return tbclk; + return CONFIG_SYS_HZ; } |