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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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 */
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- 
 
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#include <interrupt.h>
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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 <panic.h>
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#include <print.h>
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#include <print.h>
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#include <symtab.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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#include <arch/drivers/keyboard.h>
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static void print_regdump(struct exception_regdump *pstate)
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static void print_regdump(struct exception_regdump *pstate)
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{
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{
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    char *pcsymbol = "";
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    char *pcsymbol = "";
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    char *rasymbol = "";
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    char *rasymbol = "";
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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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{
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    cp0_compare_write(cp0_count_read() + cp0_compare_value);
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    clock();
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}
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static void swint0(int n, void *stack)
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{
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    cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
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}
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static void swint1(int n, void *stack)
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{
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    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
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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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void interrupt(struct exception_regdump *pstate)
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{
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{
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    __u32 cause;
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    __u32 cause;
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    int i;
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    int i;
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    /* decode interrupt number and process the interrupt */
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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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    cause = (cp0_cause_read() >> 8) &0xff;
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    for (i = 0; i < 8; i++) {
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    for (i = 0; i < 8; i++)
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        if (cause & (1 << i)) {
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        if (cause & (1 << i))
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            switch (i) {
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                case 0: /* SW0 - Software interrupt 0 */
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                    cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */
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                    break;
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                case 1: /* SW1 - Software interrupt 1 */
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                    cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */
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                    break;
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                case KEYBOARD_IRQ:
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                    keyboard();
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                    break;
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                    case 3:
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                case 4: /* IRQ2 */
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                case 5: /* IRQ3 */
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                case 6: /* IRQ4 */
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                default:
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                    print_regdump(pstate);
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            exc_dispatch(i, (void *)pstate);
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                    panic("unhandled interrupt %d\n", i);
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                    break;
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}
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                case TIMER_IRQ:
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                    /* clear timer interrupt & set new */
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/* Initialize basic tables for exception dispatching */
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                    cp0_compare_write(cp0_count_read() + cp0_compare_value);
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                    clock();
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                    keyboard_poll();
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void interrupt_init(void)
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                    break;
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            }
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{
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        }
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    int i;
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    }
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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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    exc_register(0, "swint0", swint0);
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    exc_register(1, "swint1", swint1);
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}
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}