Last change
on this file since 899 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:
1.2 KB
|
Rev | Line | |
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[520] | 1 | /* |
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| 2 | * Check that lc also updates the local L1 cache. |
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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 | .text |
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| 8 | .globl _start |
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| 9 | _start: |
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| 10 | .set noreorder |
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| 11 | la k0, TTY_BASE |
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| 12 | la k1, EXIT_BASE |
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| 13 | |
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| 14 | /* reset cop0 status (keep BEV) */ |
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| 15 | lui a0, 0x0040; |
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| 16 | mtc0 a0, COP0_STATUS |
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| 17 | |
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| 18 | /* enable caches */ |
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| 19 | li a0, VC_TLB_EN_ICACHE | VC_TLB_EN_DCACHE |
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| 20 | mtc2 a0, VC_TLB_EN |
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| 21 | |
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| 22 | /* fetch data in cache */ |
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| 23 | la s0, myvar |
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| 24 | lw a0, 0(s0) |
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| 25 | /* write magic value */ |
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| 26 | li a0, MAGIC1 |
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| 27 | sw a0, 0(s0) |
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| 28 | /* ll/sc another value on the same address */ |
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| 29 | 2: |
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| 30 | ll a0, 0(s0) |
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| 31 | PRINTX |
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| 32 | PUTCHAR(' ') |
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| 33 | li a0, MAGIC2 |
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| 34 | sc a0, 0(s0) |
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| 35 | beqz a0, 2b |
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| 36 | /* now check that we got the right value in cache */ |
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| 37 | lw a0, 0(s0) |
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| 38 | PRINTX |
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| 39 | PUTCHAR('\n') |
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| 40 | EXIT(0) |
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| 41 | |
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| 42 | .globl excep |
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| 43 | excep: |
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| 44 | .set noreorder |
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| 45 | PRINT(statusstr) |
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| 46 | mfc0 a0, COP0_STATUS |
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| 47 | PRINTX |
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| 48 | |
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| 49 | PRINT(causestr) |
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| 50 | mfc0 a0, COP0_CAUSE |
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| 51 | PRINTX |
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| 52 | |
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| 53 | PRINT(pcstr) |
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| 54 | mfc0 a0, COP0_EXPC |
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| 55 | PRINTX |
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| 56 | |
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| 57 | PRINT(badvastr) |
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| 58 | mfc0 a0, COP_0_BADVADDR |
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| 59 | PRINTX |
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| 60 | |
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| 61 | PUTCHAR('\n') |
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| 62 | /* we should not get there */ |
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| 63 | EXIT(1) |
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| 64 | |
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| 65 | .rodata: |
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| 66 | statusstr: .ascii "status \0" |
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| 67 | causestr: .ascii " cause \0" |
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| 68 | pcstr: .ascii " pc \0" |
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| 69 | badvastr: .ascii " badva \0" |
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| 70 | value: .word 0x1234abcd |
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| 71 | string: .ascii "hello world \0" |
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| 72 | |
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| 73 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
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| 74 | .globl evect |
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| 75 | evect: |
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| 76 | j excep |
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| 77 | nop |
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| 78 | |
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| 79 | .data |
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| 80 | myvar: .word 0 |
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