|
Last change
on this file since 847 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 | |
|---|
| 1 | /* |
|---|
| 2 | * Check interraction between cached read/write and ll/sc |
|---|
| 3 | */ |
|---|
| 4 | #include <registers.h> |
|---|
| 5 | #include <misc.h> |
|---|
| 6 | #include <vcache.h> |
|---|
| 7 | |
|---|
| 8 | .text |
|---|
| 9 | .globl _start |
|---|
| 10 | _start: |
|---|
| 11 | .set noreorder |
|---|
| 12 | la k0, TTY_BASE |
|---|
| 13 | la k1, EXIT_BASE |
|---|
| 14 | |
|---|
| 15 | /* reset cop0 status (keep BEV) */ |
|---|
| 16 | lui a0, 0x0040; |
|---|
| 17 | mtc0 a0, COP0_STATUS |
|---|
| 18 | |
|---|
| 19 | la a0, pte1 |
|---|
| 20 | srl a0, a0, 13 |
|---|
| 21 | mtc2 a0, VC_PTPR |
|---|
| 22 | nop |
|---|
| 23 | |
|---|
| 24 | li a0, VC_TLB_EN_ITLB | VC_TLB_EN_DTLB | VC_TLB_EN_ICACHE | VC_TLB_EN_DCACHE |
|---|
| 25 | mtc2 a0, VC_TLB_EN |
|---|
| 26 | |
|---|
| 27 | /* make sure myvar is in cache */ |
|---|
| 28 | la s1, myvar |
|---|
| 29 | lw a0, 0(s1) |
|---|
| 30 | PRINTX |
|---|
| 31 | PUTCHAR(' ') |
|---|
| 32 | |
|---|
| 33 | /* now write to myvar via ll/sc */ |
|---|
| 34 | la s1, myvar |
|---|
| 35 | 1: |
|---|
| 36 | ll a0, 0(s1) |
|---|
| 37 | li a1, MAGIC2 |
|---|
| 38 | sc a1, 0(s1) |
|---|
| 39 | beqz a1, 1b |
|---|
| 40 | nop |
|---|
| 41 | |
|---|
| 42 | PRINTX /* print what we read with ll */ |
|---|
| 43 | PUTCHAR(' ') |
|---|
| 44 | |
|---|
| 45 | la s1, myvar |
|---|
| 46 | lw a0, 0(s1) /* print the new value */ |
|---|
| 47 | PRINTX |
|---|
| 48 | PUTCHAR(' ') |
|---|
| 49 | |
|---|
| 50 | /* restore myvar value via normal write */ |
|---|
| 51 | la s1, myvar |
|---|
| 52 | li a1, MAGIC1 |
|---|
| 53 | sw a1, 0(s1) |
|---|
| 54 | |
|---|
| 55 | /* read myvar */ |
|---|
| 56 | lw a0, 0(s1) |
|---|
| 57 | PRINTX |
|---|
| 58 | PUTCHAR('\n'); |
|---|
| 59 | |
|---|
| 60 | EXIT(0) |
|---|
| 61 | |
|---|
| 62 | .globl excep |
|---|
| 63 | excep: |
|---|
| 64 | .set noreorder |
|---|
| 65 | PRINT(statusstr) |
|---|
| 66 | mfc0 a0, COP0_STATUS |
|---|
| 67 | PRINTX |
|---|
| 68 | |
|---|
| 69 | PRINT(causestr) |
|---|
| 70 | mfc0 a0, COP0_CAUSE |
|---|
| 71 | PRINTX |
|---|
| 72 | |
|---|
| 73 | PRINT(pcstr) |
|---|
| 74 | mfc0 a0, COP0_EXPC |
|---|
| 75 | PRINTX |
|---|
| 76 | |
|---|
| 77 | PRINT(badvastr) |
|---|
| 78 | mfc0 a0, COP_0_BADVADDR |
|---|
| 79 | PRINTX |
|---|
| 80 | |
|---|
| 81 | PUTCHAR('\n') |
|---|
| 82 | /* we should not get there */ |
|---|
| 83 | EXIT(1) |
|---|
| 84 | |
|---|
| 85 | .rodata: |
|---|
| 86 | statusstr: .ascii "status \0" |
|---|
| 87 | causestr: .ascii " cause \0" |
|---|
| 88 | pcstr: .ascii " pc \0" |
|---|
| 89 | badvastr: .ascii " badva \0" |
|---|
| 90 | value: .word 0x1234abcd |
|---|
| 91 | string: .ascii "hello world \0" |
|---|
| 92 | |
|---|
| 93 | .org EXCEP_ADDRESS - BOOT_ADDRESS |
|---|
| 94 | .globl evect |
|---|
| 95 | evect: |
|---|
| 96 | j excep |
|---|
| 97 | nop |
|---|
| 98 | |
|---|
| 99 | .data |
|---|
| 100 | myvar: .word MAGIC1 |
|---|
| 101 | .globl pte1 |
|---|
| 102 | pte1: |
|---|
| 103 | .align 13 |
|---|
| 104 | .word PTE1_V | PTE1_W | 0x0 /* map PA 0 at VA 0 */ |
|---|
| 105 | .org pte1 + (BOOT_ADDRESS >> 21) * 4 |
|---|
| 106 | .word PTE1_V | PTE1_C | PTE1_X | (BOOT_ADDRESS >> 21) /* map PA 0xbfc00000 at VA 0xbfc00000 */ |
|---|
| 107 | .org pte1 + (TTY_BASE >> 21) * 4 |
|---|
| 108 | .word PTE1_V | PTE1_W | (TTY_BASE >> 21) /* map PA 0xd0200000 at VA 0xd0200000 */ |
|---|
| 109 | .org pte1 + (EXIT_BASE >> 21) * 4 |
|---|
| 110 | .word PTE1_V | PTE1_W | (EXIT_BASE >> 21) /* map PA 0xe0000000 at VA 0xe0000000 */ |
|---|
| 111 | .org pte1 + 8192 |
|---|
| 112 | .word 0 |
|---|
| 113 | |
|---|
Note: See
TracBrowser
for help on using the repository browser.
