#include <common.h>
#include <asm/arch/ixp425.h>
-
-#ifdef CONFIG_USE_IRQ
-/*
- * When interrupts are enabled, use timer 2 for time/delay generation...
- */
-
-#define FREQ 66666666
-#define CLOCK_TICK_RATE (((FREQ / CFG_HZ & ~IXP425_OST_RELOAD_MASK) + 1) * CFG_HZ)
-#define LATCH ((CLOCK_TICK_RATE + CFG_HZ/2) / CFG_HZ) /* For divider */
+#include <asm/proc-armv/ptrace.h>
struct _irq_handler {
void *m_data;
static struct _irq_handler IRQ_HANDLER[N_IRQS];
-static volatile ulong timestamp;
-
-/* enable IRQ/FIQ interrupts */
-void enable_interrupts(void)
-{
- unsigned long temp;
- __asm__ __volatile__("mrs %0, cpsr\n"
- "bic %0, %0, #0x80\n"
- "msr cpsr_c, %0"
- : "=r" (temp)
- :
- : "memory");
-}
-
-/*
- * disable IRQ/FIQ interrupts
- * returns true if interrupts had been enabled before we disabled them
- */
-int disable_interrupts(void)
-{
- unsigned long old,temp;
- __asm__ __volatile__("mrs %0, cpsr\n"
- "orr %1, %0, #0x80\n"
- "msr cpsr_c, %1"
- : "=r" (old), "=r" (temp)
- :
- : "memory");
- return (old & 0x80) == 0;
-}
-
static void default_isr(void *data)
{
printf("default_isr(): called for IRQ %d, Interrupt Status=%x PR=%x\n",
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)
-{
- return timestamp - base;
-}
-
-void reset_timer (void)
-{
- timestamp = 0;
-}
-
-#else /* #ifdef CONFIG_USE_IRQ */
-void enable_interrupts (void)
-{
- return;
-}
-int disable_interrupts (void)
-{
- return 0;
-}
-#endif /* #ifdef CONFIG_USE_IRQ */
-
-void bad_mode (void)
-{
- panic ("Resetting CPU ...\n");
- reset_cpu (0);
-}
-
-void show_regs (struct pt_regs *regs)
-{
- unsigned long flags;
- const char *processor_modes[] = {
- "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
- "UK4_26", "UK5_26", "UK6_26", "UK7_26",
- "UK8_26", "UK9_26", "UK10_26", "UK11_26",
- "UK12_26", "UK13_26", "UK14_26", "UK15_26",
- "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
- "UK4_32", "UK5_32", "UK6_32", "ABT_32",
- "UK8_32", "UK9_32", "UK10_32", "UND_32",
- "UK12_32", "UK13_32", "UK14_32", "SYS_32"
- };
-
- flags = condition_codes (regs);
-
- printf ("pc : [<%08lx>] lr : [<%08lx>]\n"
- "sp : %08lx ip : %08lx fp : %08lx\n",
- instruction_pointer (regs),
- regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
- printf ("r10: %08lx r9 : %08lx r8 : %08lx\n",
- regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
- printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
- regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
- printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
- regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
- printf ("Flags: %c%c%c%c",
- flags & CC_N_BIT ? 'N' : 'n',
- flags & CC_Z_BIT ? 'Z' : 'z',
- flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
- printf (" IRQs %s FIQs %s Mode %s%s\n",
- interrupts_enabled (regs) ? "on" : "off",
- fast_interrupts_enabled (regs) ? "on" : "off",
- processor_modes[processor_mode (regs)],
- thumb_mode (regs) ? " (T)" : "");
-}
-
-void do_undefined_instruction (struct pt_regs *pt_regs)
-{
- printf ("undefined instruction\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_software_interrupt (struct pt_regs *pt_regs)
-{
- printf ("software interrupt\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_prefetch_abort (struct pt_regs *pt_regs)
-{
- printf ("prefetch abort\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_data_abort (struct pt_regs *pt_regs)
-{
- printf ("data abort\n");
- show_regs (pt_regs);
- bad_mode ();
-}
-
-void do_not_used (struct pt_regs *pt_regs)
+void do_irq (struct pt_regs *pt_regs)
{
- printf ("not used\n");
- show_regs (pt_regs);
- bad_mode ();
-}
+ int irq = next_irq();
-void do_fiq (struct pt_regs *pt_regs)
-{
- printf ("fast interrupt request\n");
- show_regs (pt_regs);
- printf("IRQ=%08lx FIQ=%08lx\n", *IXP425_ICIH, *IXP425_ICFH);
+ 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)
{
-#ifdef CONFIG_USE_IRQ
- int irq = next_irq();
+ if (irq >= N_IRQS || !handle_irq)
+ return;
- IRQ_HANDLER[irq].m_func(IRQ_HANDLER[irq].m_data);
-#else
- printf ("interrupt request\n");
- show_regs (pt_regs);
- bad_mode ();
-#endif
+ IRQ_HANDLER[irq].m_data = data;
+ IRQ_HANDLER[irq].m_func = handle_irq;
}
-int interrupt_init (void)
+int arch_interrupt_init (void)
{
-#ifdef CONFIG_USE_IRQ
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);
-#endif
-
return (0);
}
projects / karo-tx-uboot.git / blobdiff