diff options
Diffstat (limited to 'cpu/ixp')
| -rw-r--r-- | cpu/ixp/Makefile | 6 | ||||
| -rw-r--r-- | cpu/ixp/interrupts.c | 55 | ||||
| -rw-r--r-- | cpu/ixp/timer.c | 54 |
3 files changed, 66 insertions, 49 deletions
diff --git a/cpu/ixp/Makefile b/cpu/ixp/Makefile index a673cb1b9f..1403c4f390 100644 --- a/cpu/ixp/Makefile +++ b/cpu/ixp/Makefile @@ -26,12 +26,10 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(CPU).a START = start.o + COBJS-y += cpu.o -ifndef CONFIG_USE_IRQ +COBJS-$(CONFIG_USE_IRQ) += interrupts.o COBJS-y += timer.o -else -COBJS-y += interrupts.o -endif SRCS := $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) diff --git a/cpu/ixp/interrupts.c b/cpu/ixp/interrupts.c index ee0129ead3..a05e439fdb 100644 --- a/cpu/ixp/interrupts.c +++ b/cpu/ixp/interrupts.c @@ -33,14 +33,6 @@ #include <asm/arch/ixp425.h> #include <asm/proc-armv/ptrace.h> -/* - * When interrupts are enabled, use timer 2 for time/delay generation... - */ - -#define FREQ 66666666 -#define CLOCK_TICK_RATE (((FREQ / CONFIG_SYS_HZ & ~IXP425_OST_RELOAD_MASK) + 1) * CONFIG_SYS_HZ) -#define LATCH ((CLOCK_TICK_RATE + CONFIG_SYS_HZ/2) / CONFIG_SYS_HZ) /* For divider */ - struct _irq_handler { void *m_data; void (*m_func)( void *data); @@ -48,8 +40,6 @@ struct _irq_handler { static struct _irq_handler IRQ_HANDLER[N_IRQS]; -static volatile ulong timestamp; - static void default_isr(void *data) { printf("default_isr(): called for IRQ %d, Interrupt Status=%x PR=%x\n", @@ -61,33 +51,20 @@ static int next_irq(void) return (((*IXP425_ICIH & 0x000000fc) >> 2) - 1); } -static void timer_isr(void *data) -{ - unsigned int *pTime = (unsigned int *)data; - - (*pTime)++; - - /* - * Reset IRQ source - */ - *IXP425_OSST = IXP425_OSST_TIMER_2_PEND; -} - -ulong get_timer (ulong base) +void do_irq (struct pt_regs *pt_regs) { - return timestamp - base; -} + int irq = next_irq(); -void reset_timer (void) -{ - timestamp = 0; + IRQ_HANDLER[irq].m_func(IRQ_HANDLER[irq].m_data); } -void do_irq (struct pt_regs *pt_regs) +void irq_install_handler (int irq, interrupt_handler_t handle_irq, void *data) { - int irq = next_irq(); + if (irq >= N_IRQS || !handle_irq) + return; - IRQ_HANDLER[irq].m_func(IRQ_HANDLER[irq].m_data); + IRQ_HANDLER[irq].m_data = data; + IRQ_HANDLER[irq].m_func = handle_irq; } int interrupt_init (void) @@ -95,23 +72,11 @@ int 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; - } - - /* install interrupt handler for timer */ - IRQ_HANDLER[IXP425_TIMER_2_IRQ].m_data = (void *)×tamp; - IRQ_HANDLER[IXP425_TIMER_2_IRQ].m_func = timer_isr; - - /* setup the Timer counter value */ - *IXP425_OSRT2 = (LATCH & ~IXP425_OST_RELOAD_MASK) | IXP425_OST_ENABLE; + for (i = 0; i < N_IRQS; i++) + irq_install_handler(i, default_isr, (void *)i); /* configure interrupts for IRQ mode */ *IXP425_ICLR = 0x00000000; - /* enable timer irq */ - *IXP425_ICMR = (1 << IXP425_TIMER_2_IRQ); - return (0); } diff --git a/cpu/ixp/timer.c b/cpu/ixp/timer.c index deb227a1a6..685614966b 100644 --- a/cpu/ixp/timer.c +++ b/cpu/ixp/timer.c @@ -32,6 +32,54 @@ #include <common.h> #include <asm/arch/ixp425.h> +#ifdef CONFIG_TIMER_IRQ + +#define FREQ 66666666 +#define CLOCK_TICK_RATE (((FREQ / CONFIG_SYS_HZ & ~IXP425_OST_RELOAD_MASK) + 1) * CONFIG_SYS_HZ) +#define LATCH ((CLOCK_TICK_RATE + CONFIG_SYS_HZ/2) / CONFIG_SYS_HZ) /* For divider */ + +/* + * When interrupts are enabled, use timer 2 for time/delay generation... + */ + +static volatile ulong timestamp; + +static void timer_isr(void *data) +{ + unsigned int *pTime = (unsigned int *)data; + + (*pTime)++; + + /* + * Reset IRQ source + */ + *IXP425_OSST = IXP425_OSST_TIMER_2_PEND; +} + +ulong get_timer (ulong base) +{ + return timestamp - base; +} + +void reset_timer (void) +{ + timestamp = 0; +} + +int timer_init (void) +{ + /* install interrupt handler for timer */ + irq_install_handler(IXP425_TIMER_2_IRQ, timer_isr, (void *)×tamp); + + /* setup the Timer counter value */ + *IXP425_OSRT2 = (LATCH & ~IXP425_OST_RELOAD_MASK) | IXP425_OST_ENABLE; + + /* enable timer irq */ + *IXP425_ICMR = (1 << IXP425_TIMER_2_IRQ); + + return 0; +} +#else ulong get_timer (ulong base) { return get_timer_masked () - base; @@ -79,3 +127,9 @@ ulong get_timer_masked (void) } return (reload_constant - current); } + +int timer_init(void) +{ + return 0; +} +#endif |