source: trunk/softs/tests_cc_vcache/test_dma_unaligned/test.S @ 1015

Last change on this file since 1015 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: 1.5 KB
Line 
1/*
2 * basic DMA check: check that the DMA engine works and and doens't
3 * clobbers memory
4 */
5#include <registers.h>
6#include <misc.h>
7#include <vcache.h>
8        .text
9        .globl  _start
10_start:
11        .set noreorder
12        la      k0, TTY_BASE
13        la      k1, EXIT_BASE
14
15        PRINT(mmustr_a)
16
17        /* reset cop0 status (keep BEV) */
18        lui     a0, 0x0040;
19        mtc0    a0, COP0_STATUS
20
21        la      t0, tstdst
22        sw      zero, 0(t0);
23        PRINT(tstdst)
24        PUTCHAR('E')
25        PUTCHAR('\n')
26
27        la      a1, DMA_BASE
28        la      a0, tstsrc
29        sw      a0, DMA_SRC(a1)
30        la      a0, tstdst
31        sw      a0, DMA_DST(a1)
32        la      a0, 160 #strlen(tstsrc)
33        sw      a0, DMA_LEN(a1) /* start DMA */
34loop:
35        lw      a0, DMA_LEN(a1)
36        bne     a0, zero, loop;
37        nop
38
39        PRINT(mmustr_b)
40        PRINT(tstdst)
41
42        /* we should get there */
43        EXIT(0)
44
45        .globl excep
46excep:
47        .set noreorder
48        PRINT(statusstr)
49        mfc0    a0, COP0_STATUS
50        PRINTX
51
52        PRINT(causestr)
53        mfc0    a0, COP0_CAUSE
54        PRINTX
55
56        PRINT(pcstr)
57        mfc0    a0, COP0_EXPC
58        PRINTX
59
60        PRINT(badvastr)
61        mfc0    a0, COP_0_BADVADDR
62        PRINTX
63
64        PUTCHAR('\n')
65        /* we should not get there */
66        EXIT(3)
67
68        .rodata:
69statusstr: .ascii "status \0"
70causestr: .ascii " cause \0"
71pcstr: .ascii " pc \0"
72badvastr: .ascii " badva \0"
73mmustr_a: .ascii "before DMA \0"
74mmustr_b: .ascii "after DMA \0"
75startstr: .ascii "start\n\0"
76
77        .org EXCEP_ADDRESS - BOOT_ADDRESS
78        .globl evect
79evect:
80        j       excep
81        nop
82
83        .data
84testval:
85        .word MAGIC2
86testval2:
87        .word MAGIC4
88testval3:
89        .word MAGIC4
90tstdst:
91        .word 0
92        .org 0x1000
93testval4:
94        .word MAGIC1
95tstsrc:
96        .ascii "this is the test string unaligned and more than 64 chars long abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 123456789      abcdefghijklmnopqrstuvwxyz\n\0"
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