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#include <arch/interrupt.h>
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#include <arch/interrupt.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <arch.h>
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#include <arch.h>
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#include <arch/cp0.h>
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#include <arch/cp0.h>
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#include <time/clock.h>
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#include <time/clock.h>
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#include <panic.h>
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#include <print.h>
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#include <symtab.h>
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#include <arch/drivers/arc.h>
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#include <arch/drivers/arc.h>
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static void print_regdump(struct exception_regdump *pstate)
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{
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    char *pcsymbol = "";
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    char *rasymbol = "";
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    char *s = get_symtab_entry(pstate->epc);
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    if (s)
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        pcsymbol = s;
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    s = get_symtab_entry(pstate->ra);
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    if (s)
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        rasymbol = s;
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    printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol,
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           pstate->ra,rasymbol);
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}
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/** Disable interrupts.
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/** Disable interrupts.
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 *
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 *
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 * @return Old interrupt priority level.
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 * @return Old interrupt priority level.
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 */
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 */
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ipl_t interrupts_disable(void)
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ipl_t interrupts_disable(void)
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ipl_t interrupts_read(void)
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ipl_t interrupts_read(void)
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{
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{
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    return cp0_status_read();
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    return cp0_status_read();
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}
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}
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static void unhandled_exception(int n, void *stack)
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{
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    struct exception_regdump *pstate = (struct exception_regdump *)stack;
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    print_regdump(pstate);
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    panic("unhandled interrupt %d\n", n);
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}
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static void timer_exception(int n, void *stack)
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static void timer_exception(int n, void *stack)
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{
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{
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    cp0_compare_write(cp0_count_read() + cp0_compare_value);
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    cp0_compare_write(cp0_count_read() + cp0_compare_value);
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    clock();
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    clock();
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}
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}
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static void swint1(int n, void *stack)
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static void swint1(int n, void *stack)
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{
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{
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    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
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    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
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}
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}
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/** Basic exception handler */
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void interrupt(struct exception_regdump *pstate)
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{
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    __u32 cause;
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    int i;
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    /* decode interrupt number and process the interrupt */
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    cause = (cp0_cause_read() >> 8) &0xff;
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    for (i = 0; i < 8; i++)
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        if (cause & (1 << i))
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            exc_dispatch(i, (void *)pstate);
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}
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/* Initialize basic tables for exception dispatching */
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/* Initialize basic tables for exception dispatching */
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void interrupt_init(void)
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void interrupt_init(void)
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{
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{
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    int i;
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    int i;
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    for (i=0;i < IVT_ITEMS; i++)
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        exc_register(i, "undef", unhandled_exception);
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    exc_register(TIMER_IRQ, "timer", timer_exception);
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    int_register(TIMER_IRQ, "timer", timer_exception);
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    exc_register(0, "swint0", swint0);
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    int_register(0, "swint0", swint0);
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    exc_register(1, "swint1", swint1);
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    int_register(1, "swint1", swint1);
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}
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}