annotate experiments/qemu_vexpress_a9/startup.s @ 410:6aa9743ed362 tip

Reflect change in c3 public modifier
author Windel Bouwman
date Mon, 23 Feb 2015 21:06:04 +0100
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2 .section .init
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4 .global _Reset;
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5 _Reset:
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6
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7 _start:
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8 LDR sp, =stack_top
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10 ldr r2, =0x10009000
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11 mov r1, #'1'
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12 str r1, [r2]
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14 // Load TTBR0 and TTBR1
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15 ldr r0, =kernel_table0
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16 mcr p15, 0, r0, c2, c0, 1
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17 mcr p15, 0, r0, c2, c0, 0
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19 // Domain 0:
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20 mov r0, #3
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21 mcr p15, 0, r0, c3, c0, 0
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23 # ; Enable paging:
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24 mrc p15, 0, r0, c1, c0, 0
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25 orr r0, r0, #1
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26 mcr p15, 0, r0, c1, c0, 0
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28 // Change uart DR pointer (now located at 0x109000:
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29 ldr r2, =0x109000
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30 mov r1, #'2'
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31 str r1, [r2]
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33 BL start
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34 B .
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36 .section .padata
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38 /*
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39 Maybe the kernel is loaded at 0x60000000, so we need to map that to first
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40 megabyte also...
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41 */
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42
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43 kernel_table0:
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44 .long 0x00000402 // 0x00000000 # ; Identity map first 1 MB
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45 .long 0x10000402 // 0x00100000 # ; second mb mapping to peripherals
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46 .rept 0x600 - 2
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47 .long 0x0
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48 .endr
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49 .long 0x00000402 // 0x60000000 maps 1 MB to first MB
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50 .rept 0x1000 - 0x601
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51 .long 0x0
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52 .endr
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