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Last change
on this file since 950 was
520,
checked in by bouyer, 11 years ago
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Re-add the tests; reverting previous which was done at the wrong level (sorry)
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File size:
1.8 KB
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| Line | |
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| 1 | /* |
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| 2 | * Check that we can take an interrupt from the xicu timer0 |
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| 3 | */ |
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| 4 | #include <registers.h> |
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| 5 | #include <misc.h> |
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| 6 | #include <xicu.h> |
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| 7 | |
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| 8 | .text |
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| 9 | .globl _start |
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| 10 | _start: |
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| 11 | .set noreorder |
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| 12 | la k0, TTY_BASE |
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| 13 | la k1, EXIT_BASE |
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| 14 | |
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| 15 | /* reset cause, make sure IV is off */ |
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| 16 | mtc0 zero, COP0_CAUSE |
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| 17 | |
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| 18 | PRINT(startstr) |
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| 19 | |
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| 20 | /* program xicu */ |
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| 21 | la t0, XICU_BASE |
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| 22 | /* clear pending interrupt */ |
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| 23 | lw a0, XICU_PTI_ACK(0)(t0) |
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| 24 | /* route PTI0 to irq 0 */ |
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| 25 | li a0, 1 << 0 |
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| 26 | sw a0, XICU_MSK_PTI_E(0)(t0) |
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| 27 | /* init s0 */ |
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| 28 | li s0, MAGIC2 |
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| 29 | /* |
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| 30 | * interrupt in INTERRUPT_DELAY cycles. |
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| 31 | * Without cache this takes us to the delay slot of the jump. |
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| 32 | */ |
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| 33 | |
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| 34 | li a0, INTERRUPT_DELAY |
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| 35 | //li a0, 38 |
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| 36 | sw a0, XICU_PTI_PER(0)(t0) |
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| 37 | /* clear pending interrupt */ |
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| 38 | lw a0, XICU_PTI_ACK(0)(t0) |
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| 39 | /* reset cop0 status (keep BEV), enable interrupt 0 */ |
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| 40 | lui a0, 0x0040; |
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| 41 | addiu a0, 0x0401; |
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| 42 | mtc0 a0, COP0_STATUS |
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| 43 | |
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| 44 | nop |
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| 45 | nop |
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| 46 | nop |
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| 47 | j end |
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| 48 | li s0, MAGIC1 |
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| 49 | nop |
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| 50 | /* we should not end there */ |
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| 51 | EXIT(1) |
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| 52 | |
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| 53 | end: |
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| 54 | PRINT(endstr) |
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| 55 | move a0, s0 |
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| 56 | PRINTX |
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| 57 | PUTCHAR('\n') |
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| 58 | EXIT(0) |
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| 59 | |
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| 60 | .globl excep |
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| 61 | excep: |
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| 62 | .set noreorder |
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| 63 | /* disable timer0 */ |
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| 64 | la t0, XICU_BASE |
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| 65 | sw zero, XICU_PTI_PER(0)(t0) |
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| 66 | PRINT(statusstr) |
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| 67 | mfc0 a0, COP0_STATUS |
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| 68 | PRINTX |
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| 69 | |
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| 70 | PRINT(causestr) |
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| 71 | mfc0 a0, COP0_CAUSE |
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| 72 | PRINTX |
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| 73 | |
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| 74 | PRINT(pcstr) |
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| 75 | mfc0 a0, COP0_EXPC |
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| 76 | PRINTX |
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| 77 | |
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| 78 | PRINT(badvastr) |
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| 79 | mfc0 a0, COP_0_BADVADDR |
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| 80 | PRINTX |
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| 81 | |
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| 82 | PRINT(xicustr) |
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| 83 | la t0, XICU_BASE |
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| 84 | lw a0, XICU_PRIO(0)(t0) |
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| 85 | PRINTX |
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| 86 | |
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| 87 | PUTCHAR('\n') |
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| 88 | /* clear interrupt */ |
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| 89 | mfc0 a0, COP0_CAUSE |
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| 90 | andi t0, a0, 0xff00 |
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| 91 | xor a0, a0, t0 |
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| 92 | mtc0 a0, COP0_CAUSE |
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| 93 | eret |
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| 94 | /* we should not end there */ |
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| 95 | EXIT(1) |
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| 96 | |
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| 97 | .rodata: |
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| 98 | statusstr: .ascii "status \0" |
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| 99 | causestr: .ascii " cause \0" |
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| 100 | pcstr: .ascii " pc \0" |
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| 101 | badvastr: .ascii " badva \0" |
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| 102 | xicustr: .ascii " xicu \0" |
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| 103 | startstr: .ascii "start\n\0" |
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| 104 | endstr: .ascii "end \0" |
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| 105 | |
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| 106 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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| 107 | .globl evect |
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| 108 | evect: |
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| 109 | j excep |
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| 110 | nop |
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| 111 | .data |
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| 112 | myvar: .word 0 |
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