Last change
on this file since 685 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:
1.9 KB
|
Line | |
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1 | /* |
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2 | * basic DMA check: check that the DMA engine works and and doens't |
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3 | * clobbers memory |
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4 | */ |
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5 | #include <registers.h> |
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6 | #include <misc.h> |
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7 | #include <vcache.h> |
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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 | PRINT(mmustr_a) |
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16 | |
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17 | /* reset cop0 status (keep BEV) */ |
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18 | lui a0, 0x0040; |
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19 | mtc0 a0, COP0_STATUS |
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20 | |
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21 | la t0, testval |
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22 | lw a0, 0(t0); |
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23 | PRINTX |
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24 | PUTCHAR(' ') |
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25 | la t0, testval2 |
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26 | lw a0, 0(t0); |
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27 | PRINTX |
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28 | PUTCHAR('\n') |
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29 | la t0, testval |
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30 | la t1, testval3 |
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31 | lw a0, 0(t0); |
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32 | sw a0, 0(t1) |
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33 | |
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34 | la a1, DMA_BASE |
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35 | la a0, tstsrc |
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36 | sw a0, DMA_SRC(a1) |
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37 | la a0, tstdst |
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38 | sw a0, DMA_DST(a1) |
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39 | la a0, 0x18 |
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40 | sw a0, DMA_LEN(a1) /* start DMA */ |
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41 | loop: |
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42 | lw a0, DMA_LEN(a1) |
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43 | bne a0, zero, loop; |
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44 | nop |
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45 | sw a0, DMA_RESET(a1) /* reset DMA */ |
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46 | |
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47 | la a0, testval2 |
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48 | sw a0, DMA_SRC(a1) |
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49 | la a0, testval |
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50 | sw a0, DMA_DST(a1) |
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51 | la a0, 0x4 |
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52 | sw a0, DMA_LEN(a1) /* start DMA */ |
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53 | loop2: |
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54 | lw a0, DMA_LEN(a1) |
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55 | bne a0, zero, loop2; |
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56 | nop |
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57 | sw a0, DMA_RESET(a1) /* reset DMA */ |
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58 | |
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59 | PRINT(mmustr_b) |
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60 | la t0, testval |
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61 | lw a0, 0(t0); |
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62 | PRINTX |
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63 | PUTCHAR(' ') |
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64 | la t0, testval2 |
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65 | lw a0, 0(t0); |
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66 | PRINTX |
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67 | PUTCHAR(' ') |
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68 | la t0, testval3 |
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69 | lw a0, 0(t0); |
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70 | PRINTX |
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71 | PUTCHAR(' ') |
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72 | la t0, tstsrc |
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73 | lw a0, 0(t0); |
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74 | PRINTX |
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75 | PUTCHAR(' ') |
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76 | la t0, tstdst |
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77 | lw a0, 0(t0); |
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78 | PRINTX |
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79 | PUTCHAR('\n') |
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80 | |
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81 | /* we should get there */ |
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82 | EXIT(0) |
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83 | |
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84 | .globl excep |
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85 | excep: |
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86 | .set noreorder |
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87 | PRINT(statusstr) |
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88 | mfc0 a0, COP0_STATUS |
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89 | PRINTX |
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90 | |
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91 | PRINT(causestr) |
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92 | mfc0 a0, COP0_CAUSE |
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93 | PRINTX |
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94 | |
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95 | PRINT(pcstr) |
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96 | mfc0 a0, COP0_EXPC |
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97 | PRINTX |
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98 | |
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99 | PRINT(badvastr) |
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100 | mfc0 a0, COP_0_BADVADDR |
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101 | PRINTX |
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102 | |
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103 | PUTCHAR('\n') |
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104 | /* we should not get there */ |
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105 | EXIT(3) |
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106 | |
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107 | .rodata: |
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108 | statusstr: .ascii "status \0" |
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109 | causestr: .ascii " cause \0" |
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110 | pcstr: .ascii " pc \0" |
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111 | badvastr: .ascii " badva \0" |
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112 | mmustr_a: .ascii "before DMA \0" |
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113 | mmustr_b: .ascii "after DMA \0" |
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114 | startstr: .ascii "start\n\0" |
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115 | |
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116 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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117 | .globl evect |
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118 | evect: |
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119 | j excep |
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120 | nop |
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121 | |
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122 | .data |
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123 | testval: |
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124 | .word MAGIC2 |
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125 | testval2: |
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126 | .word MAGIC4 |
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127 | testval3: |
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128 | .word MAGIC4 |
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129 | tstdst: |
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130 | .word 0 |
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131 | .org 0x1000 |
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132 | .word 0 |
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133 | tstsrc: |
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134 | .word MAGIC1 |
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135 | |
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