diff options
Diffstat (limited to 'arch/arm/cpu/arm720t/interrupts.c')
| -rw-r--r-- | arch/arm/cpu/arm720t/interrupts.c | 249 |
1 files changed, 2 insertions, 247 deletions
diff --git a/arch/arm/cpu/arm720t/interrupts.c b/arch/arm/cpu/arm720t/interrupts.c index c2f898f..8e763b7 100644 --- a/arch/arm/cpu/arm720t/interrupts.c +++ b/arch/arm/cpu/arm720t/interrupts.c @@ -26,267 +26,22 @@ * MA 02111-1307 USA */ -#include <common.h> -#include <clps7111.h> -#include <asm/proc-armv/ptrace.h> -#include <asm/hardware.h> - -#ifndef CONFIG_NETARM -/* we always count down the max. */ -#define TIMER_LOAD_VAL 0xffff -/* macro to read the 16 bit timer */ -#define READ_TIMER (IO_TC1D & 0xffff) - -#ifdef CONFIG_LPC2292 -#undef READ_TIMER -#define READ_TIMER (0xFFFFFFFF - GET32(T0TC)) -#endif - -#else -#define IRQEN (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_INTR_ENABLE)) -#define TM2CTRL (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_TIMER2_CONTROL)) -#define TM2STAT (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_TIMER2_STATUS)) -#define TIMER_LOAD_VAL NETARM_GEN_TSTAT_CTC_MASK -#define READ_TIMER (TM2STAT & NETARM_GEN_TSTAT_CTC_MASK) -#endif - -#ifdef CONFIG_S3C4510B -/* require interrupts for the S3C4510B */ -# ifndef CONFIG_USE_IRQ -# error CONFIG_USE_IRQ _must_ be defined when using CONFIG_S3C4510B -# else -static struct _irq_handler IRQ_HANDLER[N_IRQS]; -# endif -#endif /* CONFIG_S3C4510B */ - #ifdef CONFIG_USE_IRQ void do_irq (struct pt_regs *pt_regs) { -#if defined(CONFIG_S3C4510B) - unsigned int pending; - - while ( (pending = GET_REG( REG_INTOFFSET)) != 0x54) { /* sentinal value for no pending interrutps */ - IRQ_HANDLER[pending>>2].m_func( IRQ_HANDLER[pending>>2].m_data); - - /* clear pending interrupt */ - PUT_REG( REG_INTPEND, (1<<(pending>>2))); - } -#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR) - /* No do_irq() for IntegratorAP/CM720T as yet */ -#elif defined(CONFIG_LPC2292) - - void (*pfnct)(void); - - pfnct = (void (*)(void))VICVectAddr; - - (*pfnct)(); -#else -#error do_irq() not defined for this CPU type -#endif -} -#endif - -#ifdef CONFIG_S3C4510B -static void default_isr( void *data) { - printf ("default_isr(): called for IRQ %d\n", (int)data); -} - -static void timer_isr( void *data) { - unsigned int *pTime = (unsigned int *)data; - - (*pTime)++; - if ( !(*pTime % (CONFIG_SYS_HZ/4))) { - /* toggle LED 0 */ - PUT_REG( REG_IOPDATA, GET_REG(REG_IOPDATA) ^ 0x1); - } - } #endif -#if defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR) - /* Use IntegratorAP routines in board/integratorap.c */ -#else - +#if defined(CONFIG_TEGRA) static ulong timestamp; static ulong lastdec; -#if defined(CONFIG_USE_IRQ) && defined(CONFIG_S3C4510B) -int arch_interrupt_init (void) -{ - int i; - - /* install default interrupt handlers */ - for ( i = 0; i < N_IRQS; i++) { - IRQ_HANDLER[i].m_data = (void *)i; - IRQ_HANDLER[i].m_func = default_isr; - } - - /* configure interrupts for IRQ mode */ - PUT_REG( REG_INTMODE, 0x0); - /* clear any pending interrupts */ - PUT_REG( REG_INTPEND, 0x1FFFFF); - - lastdec = 0; - - /* install interrupt handler for timer */ - IRQ_HANDLER[INT_TIMER0].m_data = (void *)×tamp; - IRQ_HANDLER[INT_TIMER0].m_func = timer_isr; - - return 0; -} -#endif - int timer_init (void) { -#if defined(CONFIG_NETARM) - /* disable all interrupts */ - IRQEN = 0; - - /* operate timer 2 in non-prescale mode */ - TM2CTRL = ( NETARM_GEN_TIMER_SET_HZ(CONFIG_SYS_HZ) | - NETARM_GEN_TCTL_ENABLE | - NETARM_GEN_TCTL_INIT_COUNT(TIMER_LOAD_VAL)); - - /* set timer 2 counter */ - lastdec = TIMER_LOAD_VAL; -#elif defined(CONFIG_S3C4510B) - /* configure free running timer 0 */ - PUT_REG( REG_TMOD, 0x0); - /* Stop timer 0 */ - CLR_REG( REG_TMOD, TM0_RUN); - - /* Configure for interval mode */ - CLR_REG( REG_TMOD, TM1_TOGGLE); - - /* - * Load Timer data register with count down value. - * count_down_val = CONFIG_SYS_SYS_CLK_FREQ/CONFIG_SYS_HZ - */ - PUT_REG( REG_TDATA0, (CONFIG_SYS_SYS_CLK_FREQ / CONFIG_SYS_HZ)); - - /* - * Enable global interrupt - * Enable timer0 interrupt - */ - CLR_REG( REG_INTMASK, ((1<<INT_GLOBAL) | (1<<INT_TIMER0))); - - /* Start timer */ - SET_REG( REG_TMOD, TM0_RUN); -#elif defined(CONFIG_LPC2292) - PUT32(T0IR, 0); /* disable all timer0 interrupts */ - PUT32(T0TCR, 0); /* disable timer0 */ - PUT32(T0PR, CONFIG_SYS_SYS_CLK_FREQ / CONFIG_SYS_HZ); - PUT32(T0MCR, 0); - PUT32(T0TC, 0); - PUT32(T0TCR, 1); /* enable timer0 */ - -#elif defined(CONFIG_TEGRA) /* No timer routines for tegra as yet */ lastdec = 0; -#else -#error No timer_init() defined for this CPU type -#endif timestamp = 0; - return (0); -} - -#endif /* ! IntegratorAP */ - -/* - * timer without interrupts - */ - - -#if defined(CONFIG_NETARM) || defined(CONFIG_LPC2292) - -ulong get_timer (ulong base) -{ - return get_timer_masked () - base; -} - -void __udelay (unsigned long usec) -{ - ulong tmo; - - tmo = usec / 1000; - tmo *= CONFIG_SYS_HZ; - tmo /= 1000; - - tmo += get_timer (0); - - while (get_timer_masked () < tmo) -#ifdef CONFIG_LPC2292 - /* GJ - not sure whether this is really needed or a misunderstanding */ - __asm__ __volatile__(" nop"); -#else - /*NOP*/; -#endif -} - -ulong get_timer_masked (void) -{ - ulong now = READ_TIMER; - - if (lastdec >= now) { - /* normal mode */ - timestamp += lastdec - now; - } else { - /* we have an overflow ... */ - timestamp += lastdec + TIMER_LOAD_VAL - now; - } - lastdec = now; - - return timestamp; -} - -void udelay_masked (unsigned long usec) -{ - ulong tmo; - ulong endtime; - signed long diff; - - if (usec >= 1000) { - tmo = usec / 1000; - tmo *= CONFIG_SYS_HZ; - tmo /= 1000; - } else { - tmo = usec * CONFIG_SYS_HZ; - tmo /= (1000*1000); - } - - endtime = get_timer_masked () + tmo; - - do { - ulong now = get_timer_masked (); - diff = endtime - now; - } while (diff >= 0); -} - -#elif defined(CONFIG_S3C4510B) - -ulong get_timer (ulong base) -{ - return timestamp - base; -} - -void __udelay (unsigned long usec) -{ - u32 ticks; - - ticks = (usec * CONFIG_SYS_HZ) / 1000000; - - ticks += get_timer (0); - - while (get_timer (0) < ticks) - /*NOP*/; - + return 0; } - -#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR) - /* No timer routines for IntegratorAP/CM720T as yet */ -#elif defined(CONFIG_TEGRA) - /* No timer routines for tegra as yet */ -#else -#error Timer routines not defined for this CPU type #endif |