1 | #include "asm.h" |
---|
2 | |
---|
3 | BEGIN_CODE |
---|
4 | |
---|
5 | .globl _romStart |
---|
6 | .globl _start |
---|
7 | .globl _romFaultStart |
---|
8 | .globl _led_array |
---|
9 | .text |
---|
10 | SYM(romStart ): |
---|
11 | SYM(_romStart ): |
---|
12 | # This line is to make compiler happy. |
---|
13 | mov 0, g14 |
---|
14 | ldconst 0x120f,r10 # BIST register |
---|
15 | /* |
---|
16 | Setup code for in memory loaded image |
---|
17 | */ |
---|
18 | /* |
---|
19 | # Interrupt stack is used by default. |
---|
20 | # Copy all code (except Fault Table and Fault Handler) |
---|
21 | # from EPROM into DRAM. |
---|
22 | */ |
---|
23 | ldconst 0x120f,r10 //# BIST register |
---|
24 | ldconst 0x2,r3 |
---|
25 | stob r3,0(r10) //# 2->LED |
---|
26 | /* |
---|
27 | # Zero all uninitialized data |
---|
28 | */ |
---|
29 | callx _zeroBss |
---|
30 | ldconst 0x120f,r10 //# BIST register |
---|
31 | ldconst 0x3,r3 |
---|
32 | stob r3,0(r10) //# 3->LED |
---|
33 | /* |
---|
34 | # And reinitialize processor. |
---|
35 | # _start is a few lines below. |
---|
36 | # _prcb is RAM-based struct PRCB. |
---|
37 | */ |
---|
38 | ldconst 0x300, r4 |
---|
39 | ldconst _pmc_start, r5 |
---|
40 | ldconst _ram_prcb, r6 |
---|
41 | sysctl r4, r5, r6 |
---|
42 | /* |
---|
43 | # This point will never be reached. |
---|
44 | */ |
---|
45 | |
---|
46 | SYM(_pmc_start) : |
---|
47 | SYM(pmc_start) : |
---|
48 | ldconst 0x120f,r10 # BIST register |
---|
49 | ldconst 0x4,r3 |
---|
50 | stob r3,0(r10) //# 4->LED |
---|
51 | mov 0, g14 |
---|
52 | /* |
---|
53 | # To get ready to invoke procedures. |
---|
54 | # I'll use supervisor stack. |
---|
55 | */ |
---|
56 | |
---|
57 | ldconst _svrStackPtr, fp |
---|
58 | lda 16*4(fp), sp |
---|
59 | ldconst 0x5,r3 |
---|
60 | stob r3,0(r10) //# 5->LED |
---|
61 | |
---|
62 | ldconst 0x1F0000, r4 |
---|
63 | ldconst 0x1F2000, r3 |
---|
64 | ldconst 0, r5 |
---|
65 | modpc r4, r3, r5 |
---|
66 | |
---|
67 | ldconst 7,r3 |
---|
68 | stob r3,0(r10) //# 7->LED |
---|
69 | |
---|
70 | callx _rx_boot_card |
---|
71 | /* # if _romMain ever returns ... */ |
---|
72 | b _romExit |
---|
73 | |
---|
74 | SYM(romFaultStart) : |
---|
75 | SYM(_romFaultStart) : |
---|
76 | |
---|
77 | mov 0, g14 |
---|
78 | |
---|
79 | ldconst 0, sf0 |
---|
80 | /* |
---|
81 | # To get ready to invoke procedures. |
---|
82 | # I'll use supervisor stack. |
---|
83 | # _svrStackPtr is defined directly in rom.ld. |
---|
84 | */ |
---|
85 | ldconst _svrStackPtr, fp |
---|
86 | lda 16*4(fp), sp |
---|
87 | /* |
---|
88 | # Set processor priority to zero. |
---|
89 | */ |
---|
90 | ldconst 0x1F0000, r4 |
---|
91 | ldconst 0, r5 |
---|
92 | modpc r4, r4, r5 |
---|
93 | // # Now to real code |
---|
94 | // Fix this up callx _romFaultMain |
---|
95 | callx _rx_boot_card |
---|
96 | // # if _romMain ever returns ... |
---|
97 | b _romExit |
---|
98 | |
---|
99 | _romExit : |
---|
100 | // # if _romMain ever returns ... |
---|
101 | // fmark |
---|
102 | b _romExit |
---|
103 | |
---|
104 | |
---|
105 | |
---|
106 | SYM(led_array): |
---|
107 | .byte 99 |
---|
108 | .byte 1 |
---|
109 | .byte 2 |
---|
110 | .byte 3 |
---|
111 | .byte 4 |
---|
112 | .byte 5 |
---|
113 | .byte 6 |
---|
114 | .byte 7 |
---|
115 | .byte 8 |
---|
116 | .byte 9 |
---|
117 | .byte 0xa |
---|
118 | .byte 0xb |
---|
119 | .byte 0xc |
---|