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2.6 fixes
[linexec-j720] / asm / asm.asm
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c5f1f439 1 TTL C:\pocket\test\asm.cpp
2
3 AREA |.drectve|, DRECTVE
4 DCB "-defaultlib:coredll.lib "
5 DCB "-defaultlib:corelibc.lib "
6
7 EXPORT |?do_it@@YAXXZ| ; do_it
8 AREA |.pdata|, PDATA
9|$T222| DCD |?do_it@@YAXXZ|
10 DCD 0x40000100
11 AREA |.text|, CODE
12|?do_it@@YAXXZ| PROC ; do_it
13|$M220|
14
15
16 mcr p15, 0, r0, c7, c5, 0 ;/* invalidate i cache & BTB */
17 mrc p15, 0, r0, c2, c0, 0
18 mov r0, r0
19 sub pc, pc, #4
20
21
22; turn off LCD controller...
23; I couldn't figure out how to use armasm.exe conditional with variables
24; #if xscale
25; ldr r9, =0x44000000
26; ldr r8, [r9]
27; orr r8, r8, #0x400
28; str r8, [r9]
29
30; #elif strongarm
31 ldr r9, =0xb0100000
32 ldr r8, [r9]
33 bic r8, r8, #1
34 str r8, [r9]
35
36; turn off unused serial ports
37
38 mov r8, #0
39 ldr r9, =0x80010000
40 str r8, [r9, #0xC]
41 ldr r9, =0x80050000
42 str r8, [r9, #0xC]
43
44; #endif
45
46 add r9, r1, #0x100
47
48; #if xscale
49; ldr r5, =0xa0000100
50; ldr r7, =0xa0400000
51
52; #elif strongarm
53 ldr r5, =0xc0000100
54 ldr r7, =0xc0400000
55; #endif
56
57
58label ldr r8, [r9]
59 str r8, [r5]
60 add r9, r9, #4
61 add r5, r5, #4
62 cmp r5, r7
63 blt label
64
65; #if xscale
66; MOV r4, #0xA0000000
67
68; #elif strongarm
69 MOV r4, #0xc0000000
70; #endif
71
72 add r11,r4,#0x8000
73
74 mov r10,r2 ;machine number passed from DRAMloader
75
76 mcr p15, 0, r0, c8, c7, 0x00 ;/* invalidate I+D TLB */
77 mrc p15, 0, r0, c2, c0, 0
78 mov r0, r0
79 sub pc, pc, #4
80
81; they skipped this, unnecessary? seems like we need to do this
82
83 mcr p15, 0, r0, c7, c5, 0 ;/* invalidate i cache & BTB */
84
85 mov r0, #0
86 mcr p15, 0, r0, c13, c0, 0
87 mrc p15, 0, r0, c2, c0, 0
88 mov r0, r0
89 sub pc, pc, #4
90
939a9730 91; This is needed to get Linux 2.6 booting
92 mov r0, #0
93 mcr p15, 0, r0, c7, c10, 4 ; Drain write buffer
94 mcr p15, 0, r0, c7, c7, 0 ; invalidate I+D & BTB
95
96 mrc p15, 0, r0, c1, c0, 0
97 bic r0, r0, #5 ; MMU & Dcache off
98 bic r0, r0, #0x1000 ; Icache off
99 mcr p15, 0, r0, c1, c0, 0 ; disable the MMU & caches
100 mrc p15, 0, r0, c2, c0, 0
101 mov r0, r0
102 sub pc, pc, #4
103
104
105 mov r0, #0
106 mcr p15, 0, r0, c13, c0, 0 ; clear PID
107 mcr p15, 0, r0, c8, c7, 0 ; invalidate I+D TLB
108 mrc p15, 0, r0, c2, c0, 0
109 mov r0, r0
110 sub pc, pc, #4
111
112;Set parameters for kernel
c5f1f439 113 mov r0, #0
114 mov r1, r10
115 ldr r2, [r2, #0]
116 mov r2, #0
117
118; Jump into the kernel:
119 mov pc, r11
120
121
122|$M221|
123 ENDP ; |?do_it@@YAXXZ|, do_it
124 END
125
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