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Last change
on this file since 945 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:
1.9 KB
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| Line | |
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| 1 | /* |
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| 2 | * Check interraction between cached read/write and ll/sc |
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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 <vcache.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) */ |
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| 16 | lui a0, 0x0040; |
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| 17 | mtc0 a0, COP0_STATUS |
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| 18 | |
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| 19 | la a0, pte1 |
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| 20 | srl a0, a0, 13 |
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| 21 | mtc2 a0, VC_PTPR |
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| 22 | nop |
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| 23 | |
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| 24 | li a0, VC_TLB_EN_ITLB | VC_TLB_EN_DTLB | VC_TLB_EN_ICACHE | VC_TLB_EN_DCACHE |
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| 25 | mtc2 a0, VC_TLB_EN |
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| 26 | |
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| 27 | /* make sure myvar is in cache */ |
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| 28 | la s1, myvar |
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| 29 | lw a0, 0(s1) |
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| 30 | PRINTX |
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| 31 | PUTCHAR(' ') |
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| 32 | |
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| 33 | /* now write to myvar via ll/sc */ |
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| 34 | la s1, myvar |
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| 35 | 1: |
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| 36 | ll a0, 0(s1) |
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| 37 | li a1, MAGIC2 |
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| 38 | sc a1, 0(s1) |
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| 39 | beqz a1, 1b |
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| 40 | nop |
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| 41 | |
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| 42 | PRINTX /* print what we read with ll */ |
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| 43 | PUTCHAR(' ') |
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| 44 | |
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| 45 | la s1, myvar |
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| 46 | lw a0, 0(s1) /* print the new value */ |
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| 47 | PRINTX |
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| 48 | PUTCHAR(' ') |
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| 49 | |
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| 50 | /* restore myvar value via normal write */ |
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| 51 | la s1, myvar |
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| 52 | li a1, MAGIC1 |
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| 53 | sw a1, 0(s1) |
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| 54 | |
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| 55 | /* read myvar */ |
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| 56 | lw a0, 0(s1) |
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| 57 | PRINTX |
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| 58 | PUTCHAR('\n'); |
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| 59 | |
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| 60 | EXIT(0) |
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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 | PUTCHAR('\n') |
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| 82 | /* we should not get there */ |
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| 83 | EXIT(1) |
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| 84 | |
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| 85 | .rodata: |
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| 86 | statusstr: .ascii "status \0" |
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| 87 | causestr: .ascii " cause \0" |
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| 88 | pcstr: .ascii " pc \0" |
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| 89 | badvastr: .ascii " badva \0" |
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| 90 | value: .word 0x1234abcd |
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| 91 | string: .ascii "hello world \0" |
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| 92 | |
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| 93 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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| 94 | .globl evect |
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| 95 | evect: |
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| 96 | j excep |
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| 97 | nop |
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| 98 | |
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| 99 | .data |
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| 100 | myvar: .word MAGIC1 |
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| 101 | .globl pte1 |
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| 102 | pte1: |
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| 103 | .align 13 |
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| 104 | .word PTE1_V | PTE1_W | 0x0 /* map PA 0 at VA 0 */ |
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| 105 | .org pte1 + (BOOT_ADDRESS >> 21) * 4 |
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| 106 | .word PTE1_V | PTE1_C | PTE1_X | (BOOT_ADDRESS >> 21) /* map PA 0xbfc00000 at VA 0xbfc00000 */ |
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| 107 | .org pte1 + (TTY_BASE >> 21) * 4 |
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| 108 | .word PTE1_V | PTE1_W | (TTY_BASE >> 21) /* map PA 0xd0200000 at VA 0xd0200000 */ |
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| 109 | .org pte1 + (EXIT_BASE >> 21) * 4 |
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| 110 | .word PTE1_V | PTE1_W | (EXIT_BASE >> 21) /* map PA 0xe0000000 at VA 0xe0000000 */ |
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| 111 | .org pte1 + 8192 |
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| 112 | .word 0 |
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| 113 | |
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