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340
|
1
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386
|
2 .section .init
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340
|
3
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|
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4 .global _Reset;
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5 _Reset:
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387
|
6
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7 _start:
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340
|
8 LDR sp, =stack_top
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|
386
|
9
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10 ldr r2, =0x10009000
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11
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12 mov r1, #'1'
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13 str r1, [r2]
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14
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387
|
15 // Load TTBR0 and TTBR1
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|
386
|
16 ldr r0, =kernel_table0
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17 mcr p15, 0, r0, c2, c0, 1
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18 mcr p15, 0, r0, c2, c0, 0
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19
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|
387
|
20 // Domain 0:
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|
386
|
21 mov r0, #3
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|
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22 mcr p15, 0, r0, c3, c0, 0
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|
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23
|
|
387
|
24 # ; Enable paging:
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|
386
|
25 mrc p15, 0, r0, c1, c0, 0
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|
|
26 orr r0, r0, #1
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|
|
27 mcr p15, 0, r0, c1, c0, 0
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|
|
28
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|
387
|
29 // Change uart DR pointer (now located at 0x109000:
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|
|
30 ldr r2, =0x109000
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|
|
31 mov r1, #'2'
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|
386
|
32 str r1, [r2]
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|
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33
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|
340
|
34 BL start
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|
|
35 B .
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|
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36
|
|
386
|
37 .section .padata
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|
|
38
|
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387
|
39 /*
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|
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40 Maybe the kernel is loaded at 0x60000000, so we need to map that to first
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|
|
41 megabyte also...
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|
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42 */
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43
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|
386
|
44 kernel_table0:
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|
387
|
45 .long 0x00000000 + 0x402 // 0x00000000 # ; Identity map first 1 MB
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|
|
46 .long 0x10000000 + 0x402 // 0x00100000 # ; second mb mapping to peripherals
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|
|
47
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|
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48 .rept 0x600 - 2
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|
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49 .long 0x0
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50 .endr
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51 .long 0x00000402 // 0x60000000 maps 1 MB to first MB
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|
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52 .rept 0x1000 - 0x601
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|
386
|
53 .long 0x0
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|
|
54 .endr
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|
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55
|
