Last change
on this file since 299 was
265,
checked in by bouyer, 12 years ago
|
Update/add 2 new tests, from tests_mips32_vcache:
test_llsc: check basic functionnality of ll/sc
test_sc_no_ll: check that a sc without prior ll fails as expected
|
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.