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/*
 * int-handler.S
 *
 * Based on the cobalt handler.
 */
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>

/*
 * galileo_handle_int -
 *      We check for the timer first, then check PCI ints A and D.
 *      Then check for serial IRQ and fall through.
 */
                .align  5
                .set    reorder
                .set    noat
                NESTED(galileo_handle_int, PT_SIZE, sp)
                SAVE_ALL
                CLI
                .set    at
                mfc0    t0,CP0_CAUSE
                mfc0    t2,CP0_STATUS

                and     t0,t2

                andi    t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */
                bnez    t1,ll_gt64120_irq
                andi    t1,t0,STATUSF_IP2 /* int0 hardware line */
                bnez    t1,ll_pci_intA
                andi    t1,t0,STATUSF_IP5 /* int3 hardware line */
                bnez    t1,ll_pci_intD
                andi    t1,t0,STATUSF_IP6 /* int4 hardware line */
                bnez    t1,ll_serial_irq
                andi    t1,t0,STATUSF_IP7 /* compare int */
                bnez    t1,ll_compare_irq
                nop

    /* wrong alarm or masked ... */
                j       spurious_interrupt
                nop
                END(galileo_handle_int)


                .align  5
                .set    reorder
ll_gt64120_irq:
                li      a0,4
                move    a1,sp
                jal     do_IRQ
                nop
                j       ret_from_irq
                nop

                .align  5
                .set    reorder
ll_compare_irq:
                li      a0,7
                move    a1,sp
                jal     do_IRQ
                nop
                j       ret_from_irq
                nop

                .align  5
                .set    reorder
ll_pci_intA:
                move    a0,sp
                jal     pci_intA
                nop
                j       ret_from_irq
                nop

#if 0
                .align  5
                .set    reorder
ll_pci_intB:
                move    a0,sp
                jal     pci_intB
                nop
                j       ret_from_irq
                nop

                .align  5
                .set    reorder
ll_pci_intC:
                move    a0,sp
                jal     pci_intC
                nop
                j       ret_from_irq
                nop
#endif

                .align  5
                .set    reorder
ll_pci_intD:
                move    a0,sp
                jal     pci_intD
                nop
                j       ret_from_irq
                nop

                .align  5
                .set    reorder
ll_serial_irq:
                li      a0,6
                move    a1,sp
                jal     do_IRQ
                nop
                j       ret_from_irq
                nop