|
Last change
on this file since 918 was
520,
checked in by bouyer, 12 years ago
|
|
Re-add the tests; reverting previous which was done at the wrong level (sorry)
|
|
File size:
1.3 KB
|
| Line | |
|---|
| 1 | /* |
|---|
| 2 | * Check that we can take an interrupt, and return from it. |
|---|
| 3 | * We use a software-triggerted interrupt. |
|---|
| 4 | */ |
|---|
| 5 | #include <registers.h> |
|---|
| 6 | #include <misc.h> |
|---|
| 7 | |
|---|
| 8 | |
|---|
| 9 | .text |
|---|
| 10 | .globl _start |
|---|
| 11 | _start: |
|---|
| 12 | .set noreorder |
|---|
| 13 | la k0, TTY_BASE |
|---|
| 14 | la k1, EXIT_BASE |
|---|
| 15 | |
|---|
| 16 | /* reset cop0 status (keep BEV), enbale soft interrupt 0 */ |
|---|
| 17 | lui a0, 0x0040; |
|---|
| 18 | addiu a0, 0x0101; |
|---|
| 19 | mtc0 a0, COP0_STATUS |
|---|
| 20 | |
|---|
| 21 | /* reset cause, make sure IV is off */ |
|---|
| 22 | mtc0 zero, COP0_CAUSE |
|---|
| 23 | |
|---|
| 24 | PRINT(startstr) |
|---|
| 25 | |
|---|
| 26 | /* generate an interrupt */ |
|---|
| 27 | mfc0 a0, COP0_CAUSE |
|---|
| 28 | nop |
|---|
| 29 | ori a0, 0x0100 |
|---|
| 30 | mtc0 a0, COP0_CAUSE |
|---|
| 31 | li a0, MAGIC1 |
|---|
| 32 | PRINTX |
|---|
| 33 | PUTCHAR('\n') |
|---|
| 34 | /* we should end here after taking the exeption */ |
|---|
| 35 | EXIT(0) |
|---|
| 36 | |
|---|
| 37 | .globl excep |
|---|
| 38 | excep: |
|---|
| 39 | .set noreorder |
|---|
| 40 | PRINT(statusstr) |
|---|
| 41 | mfc0 a0, COP0_STATUS |
|---|
| 42 | PRINTX |
|---|
| 43 | |
|---|
| 44 | PRINT(causestr) |
|---|
| 45 | mfc0 a0, COP0_CAUSE |
|---|
| 46 | PRINTX |
|---|
| 47 | |
|---|
| 48 | PRINT(pcstr) |
|---|
| 49 | mfc0 a0, COP0_EXPC |
|---|
| 50 | PRINTX |
|---|
| 51 | |
|---|
| 52 | PRINT(badvastr) |
|---|
| 53 | mfc0 a0, COP_0_BADVADDR |
|---|
| 54 | PRINTX |
|---|
| 55 | |
|---|
| 56 | PUTCHAR('\n') |
|---|
| 57 | /* clear interrupt */ |
|---|
| 58 | mfc0 a0, COP0_CAUSE |
|---|
| 59 | xori a0, 0x100 |
|---|
| 60 | mtc0 a0, COP0_CAUSE |
|---|
| 61 | nop |
|---|
| 62 | eret |
|---|
| 63 | /* we should not end there */ |
|---|
| 64 | EXIT(1) |
|---|
| 65 | |
|---|
| 66 | .rodata: |
|---|
| 67 | statusstr: .ascii "status \0" |
|---|
| 68 | causestr: .ascii " cause \0" |
|---|
| 69 | pcstr: .ascii " pc \0" |
|---|
| 70 | badvastr: .ascii " badva \0" |
|---|
| 71 | startstr: .ascii "start\n\0" |
|---|
| 72 | eretstr: .ascii "eret\n\0" |
|---|
| 73 | |
|---|
| 74 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
|---|
| 75 | .globl evect |
|---|
| 76 | evect: |
|---|
| 77 | j excep |
|---|
| 78 | nop |
|---|
| 79 | .data |
|---|
| 80 | myvar: .word 0 |
|---|
Note: See
TracBrowser
for help on using the repository browser.
