Last change
on this file since 661 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)
|
File size:
1.6 KB
|
Line | |
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1 | /* |
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2 | * Check that we can mask an external interrupt |
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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 cop0 status (keep BEV), enable interrupt 0 */ |
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16 | lui a0, 0x0040; |
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17 | ori a0, 0xc801; |
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18 | mtc0 a0, COP0_STATUS |
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19 | |
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20 | /* reset cause, make sure IV is off */ |
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21 | mtc0 zero, COP0_CAUSE |
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22 | |
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23 | PRINT(startstr) |
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24 | |
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25 | /* program xicu */ |
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26 | la t0, XICU_BASE |
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27 | /* clear pending interrupt */ |
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28 | lw a0, XICU_PTI_ACK(0)(t0) |
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29 | /* route PTI0 to irq 0 */ |
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30 | li a0, 1 << 0 |
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31 | sw a0, XICU_MSK_PTI_E(0)(t0) |
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32 | /* interrupt in 10 cycles */ |
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33 | li a0, 10 |
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34 | sw a0, XICU_PTI_PER(0)(t0) |
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35 | /* interrupts still disabled at the MIPS level */ |
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36 | li a0, MAGIC1 |
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37 | PRINTX |
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38 | PUTCHAR('\n') |
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39 | nop |
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40 | nop |
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41 | nop |
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42 | nop |
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43 | nop |
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44 | nop |
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45 | nop |
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46 | nop |
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47 | nop |
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48 | nop |
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49 | /* enable interrupt from timer0 */ |
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50 | mfc0 a0, COP0_STATUS |
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51 | ori a0, 0x0400 |
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52 | mtc0 a0, COP0_STATUS |
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53 | |
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54 | nop |
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55 | nop |
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56 | |
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57 | 1: j 1b |
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58 | nop |
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59 | /* we should not end there */ |
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60 | EXIT(1) |
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61 | |
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62 | .globl excep |
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63 | excep: |
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64 | .set noreorder |
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65 | PRINT(statusstr) |
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66 | mfc0 a0, COP0_STATUS |
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67 | PRINTX |
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68 | |
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69 | PRINT(causestr) |
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70 | mfc0 a0, COP0_CAUSE |
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71 | PRINTX |
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72 | |
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73 | PRINT(pcstr) |
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74 | mfc0 a0, COP0_EXPC |
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75 | PRINTX |
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76 | |
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77 | PRINT(badvastr) |
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78 | mfc0 a0, COP_0_BADVADDR |
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79 | PRINTX |
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80 | |
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81 | PRINT(xicustr) |
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82 | la t0, XICU_BASE |
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83 | lw a0, XICU_PRIO(0)(t0) |
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84 | PRINTX |
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85 | |
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86 | PUTCHAR('\n') |
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87 | /* clear interrupt */ |
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88 | mfc0 a0, COP0_CAUSE |
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89 | andi t0, a0, 0xff00 |
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90 | xor a0, a0, t0 |
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91 | mtc0 a0, COP0_CAUSE |
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92 | /* we should end there */ |
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93 | EXIT(0) |
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94 | |
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95 | .rodata: |
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96 | statusstr: .ascii "status \0" |
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97 | causestr: .ascii " cause \0" |
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98 | pcstr: .ascii " pc \0" |
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99 | badvastr: .ascii " badva \0" |
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100 | xicustr: .ascii " xicu \0" |
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101 | startstr: .ascii "start\n\0" |
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102 | eretstr: .ascii "eret\n\0" |
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103 | |
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104 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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105 | .globl evect |
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106 | evect: |
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107 | j excep |
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108 | nop |
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109 | .data |
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110 | myvar: .word 0 |
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