Subversion Repositories lxp32

/*

 * This test verifies interrupt handling using a simple timer model

 */

        lc r100, 0x10000000 // test result output pointer

        lc r101, halt

        lc r102, failure

        lc r103, 0x20000000 // timer: number of pulses (0xFFFFFFFF - infinite)

        lc r104, 0x20000004 // timer: delay between pulses (in cycles)

        lc iv0, timer_handler0

        lc iv1, timer_handler1

        mov cr, 3 // enable interrupts 0 and 1

        lc r32, 2000 // cycle counter

        lc r33, cnt_loop

        mov r34, 0 // interrupt 0 call counter

        mov r35, 0 // interrupt 1 call counter

        sw r104, 100

        sw r103, 10

cnt_loop:

        sub r32, r32, 1

        cjmpug r33, r32, 0 // cnt_loop

        cjmpne r102, r34, 10 // failure

        cjmpne r102, r35, 4 // failure

        sw r100, 1

        jmp r101 // halt

failure:

        sw r100, 2

halt:

        hlt

        jmp r101 // halt

timer_handler0:

        add r34, r34, 1

        lc r0, 0x10000004

        sw r0, r34

        cjmpne irp, r34, 5 // exit interrupt handler if r34!=5

        mov cr, 1 // disable interrupt 1

        iret

timer_handler1:

        add r35, r35, 1

// Interrupt 1 has lower priority than interrupt 0 and will be called later

        cjmpne r102, r34, r35

        lc r0, 0x10000008

        sw r0, r35

        iret