source: trunk/softs/tests_cc_vcache/test_interrupt_mask/test.S @ 632

Last change on this file since 632 was 520, checked in by bouyer, 11 years ago

Re-add the tests; reverting previous which was done at the wrong level (sorry)

File size: 1.5 KB
Line 
1/*
2 * Check that the interrupt mask in status is properly handled:
3 * we generate a software-triggerted interrupt with interrupt enabled but
4 * the software interrupt masked. Later we unmask it.
5 */
6#include <registers.h>
7#include <misc.h>
8
9
10        .text
11        .globl  _start
12_start:
13        .set noreorder
14        la      k0, TTY_BASE
15        la      k1, EXIT_BASE
16
17        /* reset cop0 status (keep BEV), enbale interrupts but mask IM0 */
18        lui     a0, 0x0040;
19        ori     a0, 0xfe01;
20        mtc0    a0, COP0_STATUS
21
22        /* reset cause, make sure IV is off */
23        mtc0    zero, COP0_CAUSE
24
25        PRINT(startstr)
26
27        /* generate an interrupt */
28        mfc0    a0, COP0_CAUSE
29        nop
30        ori     a0, 0x0100
31        mtc0    a0, COP0_CAUSE
32        li      a0, MAGIC1
33        PRINTX
34        PUTCHAR('\n')
35        nop
36        nop
37        nop
38        nop
39        nop
40        nop
41        /* unmask the interrupt */
42        mfc0    a0, COP0_STATUS
43        nop
44        ori     a0, 0x0100
45        mtc0    a0, COP0_STATUS
46        /* we should end here after taking the exeption */
47        li      a0, MAGIC2
48        PRINTX
49        PUTCHAR('\n')
50        EXIT(0)
51
52        .globl excep
53excep:
54        .set noreorder
55        PRINT(statusstr)
56        mfc0    a0, COP0_STATUS
57        PRINTX
58
59        PRINT(causestr)
60        mfc0    a0, COP0_CAUSE
61        PRINTX
62
63        PRINT(pcstr)
64        mfc0    a0, COP0_EXPC
65        PRINTX
66
67        PRINT(badvastr)
68        mfc0    a0, COP_0_BADVADDR
69        PRINTX
70
71        PUTCHAR('\n')
72        /* clear interrupt */
73        mfc0    a0, COP0_CAUSE
74        xori    a0, 0x100
75        mtc0    a0, COP0_CAUSE
76        nop
77        eret
78        /* we should not end there */
79        EXIT(1)
80
81        .rodata:
82statusstr: .ascii "status \0"
83causestr: .ascii " cause \0"
84pcstr: .ascii " pc \0"
85badvastr: .ascii " badva \0"
86startstr: .ascii "start\n\0"
87eretstr: .ascii "eret\n\0"
88
89        .org EXCEP_ADDRESS - BOOT_ADDRESS
90        .globl evect
91evect:
92        j       excep
93        nop
94        .data
95myvar:  .word 0
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