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Last change
on this file since 795 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:
1.5 KB
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| 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, tstdst |
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| 22 | sw zero, 0(t0); |
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| 23 | PRINT(tstdst) |
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| 24 | PUTCHAR('E') |
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| 25 | PUTCHAR('\n') |
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| 26 | |
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| 27 | la a1, DMA_BASE |
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| 28 | la a0, tstsrc |
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| 29 | sw a0, DMA_SRC(a1) |
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| 30 | la a0, tstdst |
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| 31 | sw a0, DMA_DST(a1) |
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| 32 | la a0, 160 #strlen(tstsrc) |
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| 33 | sw a0, DMA_LEN(a1) /* start DMA */ |
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| 34 | loop: |
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| 35 | lw a0, DMA_LEN(a1) |
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| 36 | bne a0, zero, loop; |
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| 37 | nop |
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| 38 | |
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| 39 | PRINT(mmustr_b) |
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| 40 | PRINT(tstdst) |
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| 41 | |
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| 42 | /* we should get there */ |
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| 43 | EXIT(0) |
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| 44 | |
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| 45 | .globl excep |
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| 46 | excep: |
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| 47 | .set noreorder |
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| 48 | PRINT(statusstr) |
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| 49 | mfc0 a0, COP0_STATUS |
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| 50 | PRINTX |
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| 51 | |
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| 52 | PRINT(causestr) |
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| 53 | mfc0 a0, COP0_CAUSE |
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| 54 | PRINTX |
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| 55 | |
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| 56 | PRINT(pcstr) |
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| 57 | mfc0 a0, COP0_EXPC |
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| 58 | PRINTX |
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| 59 | |
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| 60 | PRINT(badvastr) |
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| 61 | mfc0 a0, COP_0_BADVADDR |
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| 62 | PRINTX |
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| 63 | |
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| 64 | PUTCHAR('\n') |
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| 65 | /* we should not get there */ |
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| 66 | EXIT(3) |
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| 67 | |
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| 68 | .rodata: |
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| 69 | statusstr: .ascii "status \0" |
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| 70 | causestr: .ascii " cause \0" |
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| 71 | pcstr: .ascii " pc \0" |
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| 72 | badvastr: .ascii " badva \0" |
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| 73 | mmustr_a: .ascii "before DMA \0" |
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| 74 | mmustr_b: .ascii "after DMA \0" |
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| 75 | startstr: .ascii "start\n\0" |
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| 76 | |
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| 77 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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| 78 | .globl evect |
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| 79 | evect: |
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| 80 | j excep |
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| 81 | nop |
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| 82 | |
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| 83 | .data |
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| 84 | testval: |
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| 85 | .word MAGIC2 |
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| 86 | testval2: |
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| 87 | .word MAGIC4 |
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| 88 | testval3: |
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| 89 | .word MAGIC4 |
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| 90 | tstdst: |
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| 91 | .word 0 |
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| 92 | .org 0x1000 |
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| 93 | testval4: |
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| 94 | .word MAGIC1 |
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| 95 | tstsrc: |
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| 96 | .ascii "this is the test string unaligned and more than 64 chars long abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 123456789 abcdefghijklmnopqrstuvwxyz\n\0" |
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