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针对德州仪器DM270开发板的bootloader,其实现了内核的下载以及文件系统的下载

rrload:     file format elf32-littlearm

Disassembly of section .reset:

00900000 <_start>:
  900000:	e3a000d3 	mov	r0, #211	; 0xd3
  900004:	e129f000 	msr	CPSR_all, r0
  900008:	e3a0a000 	mov	r10, #0	; 0x0
  90000c:	e3a0d902 	mov	sp, #32768	; 0x8000
  900010:	e3a0b000 	mov	r11, #0	; 0x0
  900014:	ea0012d6 	b	904b74 <bootstrap>

00900018 <flash>:
  900018:	e59f0078 	ldr	r0, [pc, #78]	; 900098 <EMIF_CS0CTRL1>
  90001c:	e59f1078 	ldr	r1, [pc, #78]	; 90009c <CS0CTRL1_DATA>
  900020:	e1c010b0 	strh	r1, [r0]
  900024:	e59f0074 	ldr	r0, [pc, #74]	; 9000a0 <EMIF_CS0CTRL2>
  900028:	e59f1074 	ldr	r1, [pc, #74]	; 9000a4 <CS0CTRL2_DATA>
  90002c:	e1c010b0 	strh	r1, [r0]
  900030:	e1a0f00e 	mov	pc, lr

00900034 <clock_ini>:
  900034:	e59f006c 	ldr	r0, [pc, #6c]	; 9000a8 <CLKC_PLLA>
  900038:	e59f108c 	ldr	r1, [pc, #8c]	; 9000cc <PLLAOUT_DATA>
  90003c:	e1c010b0 	strh	r1, [r0]
  900040:	e59f0064 	ldr	r0, [pc, #64]	; 9000ac <CLKC_PLLB>
  900044:	e59f1084 	ldr	r1, [pc, #84]	; 9000d0 <PLLBOUT_DATA>
  900048:	e1c010b0 	strh	r1, [r0]
  90004c:	e59f005c 	ldr	r0, [pc, #5c]	; 9000b0 <CLKC_CLKC>
  900050:	e59f1070 	ldr	r1, [pc, #70]	; 9000c8 <CLOCKC_DATA>
  900054:	e1c010b0 	strh	r1, [r0]
  900058:	e59f0058 	ldr	r0, [pc, #58]	; 9000b8 <CLKC_DIV>
  90005c:	e59f1074 	ldr	r1, [pc, #74]	; 9000d8 <DIV_DATA>
  900060:	e1c010b0 	strh	r1, [r0]
  900064:	e59f0048 	ldr	r0, [pc, #48]	; 9000b4 <CLKC_SEL>
  900068:	e59f1064 	ldr	r1, [pc, #64]	; 9000d4 <SEL_DATA>
  90006c:	e1c010b0 	strh	r1, [r0]
  900070:	e59f0044 	ldr	r0, [pc, #44]	; 9000bc <CLOCKC_MOD1>
  900074:	e59f1060 	ldr	r1, [pc, #60]	; 9000dc <MOD1_DATA>
  900078:	e1c010b0 	strh	r1, [r0]
  90007c:	e59f003c 	ldr	r0, [pc, #3c]	; 9000c0 <CLOCKC_MOD2>
  900080:	e59f1058 	ldr	r1, [pc, #58]	; 9000e0 <MOD2_DATA>
  900084:	e1c010b0 	strh	r1, [r0]
  900088:	e59f0034 	ldr	r0, [pc, #34]	; 9000c4 <CLOCKC_MOD3>
  90008c:	e59f1050 	ldr	r1, [pc, #50]	; 9000e4 <MOD3_DATA>
  900090:	e1c010b0 	strh	r1, [r0]
  900094:	e1a0f00e 	mov	pc, lr

00900098 <EMIF_CS0CTRL1>:
  900098:	00030a00 	andeq	r0, r3, r0, lsl #20

0090009c <CS0CTRL1_DATA>:
  90009c:	0000aaef 	andeq	r10, r0, pc, ror #21

009000a0 <EMIF_CS0CTRL2>:
  9000a0:	00030a02 	andeq	r0, r3, r2, lsl #20

009000a4 <CS0CTRL2_DATA>:
  9000a4:	00007221 	andeq	r7, r0, r1, lsr #4

009000a8 <CLKC_PLLA>:
  9000a8:	00030880 	andeq	r0, r3, r0, lsl #17

009000ac <CLKC_PLLB>:
  9000ac:	00030882 	andeq	r0, r3, r2, lsl #17

009000b0 <CLKC_CLKC>:
  9000b0:	00030884 	andeq	r0, r3, r4, lsl #17

009000b4 <CLKC_SEL>:
  9000b4:	00030886 	andeq	r0, r3, r6, lsl #17

009000b8 <CLKC_DIV>:
  9000b8:	00030888 	andeq	r0, r3, r8, lsl #17

009000bc <CLOCKC_MOD1>:
  9000bc:	00030890 	muleq	r3, r0, r8

009000c0 <CLOCKC_MOD2>:
  9000c0:	00030892 	muleq	r3, r2, r8

009000c4 <CLOCKC_MOD3>:
  9000c4:	00030894 	muleq	r3, r4, r8

009000c8 <CLOCKC_DATA>:
  9000c8:	00004200 	andeq	r4, r0, r0, lsl #4

009000cc <PLLAOUT_DATA>:
  9000cc:	000080e1 	andeq	r8, r0, r1, ror #1

009000d0 <PLLBOUT_DATA>:
  9000d0:	000080c1 	andeq	r8, r0, r1, asr #1

009000d4 <SEL_DATA>:
  9000d4:	00001011 	andeq	r1, r0, r1, lsl r0

009000d8 <DIV_DATA>:
  9000d8:	00000111 	andeq	r0, r0, r1, lsl r1

009000dc <MOD1_DATA>:
  9000dc:	000007ff 	streqsh	r0, [r0], -pc

009000e0 <MOD2_DATA>:
  9000e0:	000001ff 	streqsh	r0, [r0], -pc

009000e4 <MOD3_DATA>:
  9000e4:	00003fff 	streqsh	r3, [r0], -pc

009000e8 <L_STACK_MAGIC>:
  9000e8:	deadbeef 	cdple	14, 10, cr11, cr13, cr15, {7}

009000ec <L_STACK_UNTOUCHED_MAGIC>:
  9000ec:	feef1ef0 	mcrnv	14, 7, r1, cr15, cr0, {7}
  9000f0:	00000000 	andeq	r0, r0, r0
  9000f4:	05f40000 	ldreqb	r0, [r4]!
  9000f8:	00004432 	andeq	r4, r0, r2, lsr r4
  9000fc:	00000000 	andeq	r0, r0, r0
  900100:	00000064 	andeq	r0, r0, r4, rrx
  900104:	00900000 	addeqs	r0, r0, r0
  900108:	00000010 	andeq	r0, r0, r0, lsl r0
  90010c:	00000084 	andeq	r0, r0, r4, lsl #1
  900110:	00900000 	addeqs	r0, r0, r0
  900114:	0000001d 	andeq	r0, r0, sp, lsl r0
  900118:	002f0044 	eoreq	r0, pc, r4, asr #32
  90011c:	00900000 	addeqs	r0, r0, r0
  900120:	0000001d 	andeq	r0, r0, sp, lsl r0
  900124:	00300044 	eoreqs	r0, r0, r4, asr #32
  900128:	00900004 	addeqs	r0, r0, r4
  90012c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900130:	003c0044 	eoreqs	r0, r12, r4, asr #32
  900134:	00900008 	addeqs	r0, r0, r8
  900138:	0000001d 	andeq	r0, r0, sp, lsl r0
  90013c:	00400044 	subeq	r0, r0, r4, asr #32
  900140:	0090000c 	addeqs	r0, r0, r12
  900144:	0000001d 	andeq	r0, r0, sp, lsl r0
  900148:	00420044 	subeq	r0, r2, r4, asr #32
  90014c:	00900010 	addeqs	r0, r0, r0, lsl r0
  900150:	0000001d 	andeq	r0, r0, sp, lsl r0
  900154:	00430044 	subeq	r0, r3, r4, asr #32
  900158:	00900014 	addeqs	r0, r0, r4, lsl r0
  90015c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900160:	00520044 	subeqs	r0, r2, r4, asr #32
  900164:	00900018 	addeqs	r0, r0, r8, lsl r0
  900168:	0000001d 	andeq	r0, r0, sp, lsl r0
  90016c:	00520044 	subeqs	r0, r2, r4, asr #32
  900170:	00900018 	addeqs	r0, r0, r8, lsl r0
  900174:	0000001d 	andeq	r0, r0, sp, lsl r0
  900178:	00520044 	subeqs	r0, r2, r4, asr #32
  90017c:	0090001c 	addeqs	r0, r0, r12, lsl r0
  900180:	0000001d 	andeq	r0, r0, sp, lsl r0
  900184:	00520044 	subeqs	r0, r2, r4, asr #32
  900188:	00900020 	addeqs	r0, r0, r0, lsr #32
  90018c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900190:	00530044 	subeqs	r0, r3, r4, asr #32
  900194:	00900024 	addeqs	r0, r0, r4, lsr #32
  900198:	0000001d 	andeq	r0, r0, sp, lsl r0
  90019c:	00530044 	subeqs	r0, r3, r4, asr #32
  9001a0:	00900024 	addeqs	r0, r0, r4, lsr #32
  9001a4:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001a8:	00530044 	subeqs	r0, r3, r4, asr #32
  9001ac:	00900028 	addeqs	r0, r0, r8, lsr #32
  9001b0:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001b4:	00530044 	subeqs	r0, r3, r4, asr #32
  9001b8:	0090002c 	addeqs	r0, r0, r12, lsr #32
  9001bc:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001c0:	00540044 	subeqs	r0, r4, r4, asr #32
  9001c4:	00900030 	addeqs	r0, r0, r0, lsr r0
  9001c8:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001cc:	005b0044 	subeqs	r0, r11, r4, asr #32
  9001d0:	00900034 	addeqs	r0, r0, r4, lsr r0
  9001d4:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001d8:	005b0044 	subeqs	r0, r11, r4, asr #32
  9001dc:	00900034 	addeqs	r0, r0, r4, lsr r0
  9001e0:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001e4:	005b0044 	subeqs	r0, r11, r4, asr #32
  9001e8:	00900038 	addeqs	r0, r0, r8, lsr r0
  9001ec:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001f0:	005b0044 	subeqs	r0, r11, r4, asr #32
  9001f4:	0090003c 	addeqs	r0, r0, r12, lsr r0
  9001f8:	0000001d 	andeq	r0, r0, sp, lsl r0
  9001fc:	005c0044 	subeqs	r0, r12, r4, asr #32
  900200:	00900040 	addeqs	r0, r0, r0, asr #32
  900204:	0000001d 	andeq	r0, r0, sp, lsl r0
  900208:	005c0044 	subeqs	r0, r12, r4, asr #32
  90020c:	00900040 	addeqs	r0, r0, r0, asr #32
  900210:	0000001d 	andeq	r0, r0, sp, lsl r0
  900214:	005c0044 	subeqs	r0, r12, r4, asr #32
  900218:	00900044 	addeqs	r0, r0, r4, asr #32
  90021c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900220:	005c0044 	subeqs	r0, r12, r4, asr #32
  900224:	00900048 	addeqs	r0, r0, r8, asr #32
  900228:	0000001d 	andeq	r0, r0, sp, lsl r0
  90022c:	005d0044 	subeqs	r0, sp, r4, asr #32
  900230:	0090004c 	addeqs	r0, r0, r12, asr #32
  900234:	0000001d 	andeq	r0, r0, sp, lsl r0
  900238:	005d0044 	subeqs	r0, sp, r4, asr #32
  90023c:	0090004c 	addeqs	r0, r0, r12, asr #32
  900240:	0000001d 	andeq	r0, r0, sp, lsl r0
  900244:	005d0044 	subeqs	r0, sp, r4, asr #32
  900248:	00900050 	addeqs	r0, r0, r0, asr r0
  90024c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900250:	005d0044 	subeqs	r0, sp, r4, asr #32
  900254:	00900054 	addeqs	r0, r0, r4, asr r0
  900258:	0000001d 	andeq	r0, r0, sp, lsl r0
  90025c:	005e0044 	subeqs	r0, lr, r4, asr #32
  900260:	00900058 	addeqs	r0, r0, r8, asr r0
  900264:	0000001d 	andeq	r0, r0, sp, lsl r0
  900268:	005e0044 	subeqs	r0, lr, r4, asr #32
  90026c:	00900058 	addeqs	r0, r0, r8, asr r0
  900270:	0000001d 	andeq	r0, r0, sp, lsl r0
  900274:	005e0044 	subeqs	r0, lr, r4, asr #32
  900278:	0090005c 	addeqs	r0, r0, r12, asr r0
  90027c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900280:	005e0044 	subeqs	r0, lr, r4, asr #32
  900284:	00900060 	addeqs	r0, r0, r0, rrx
  900288:	0000001d 	andeq	r0, r0, sp, lsl r0
  90028c:	005f0044 	subeqs	r0, pc, r4, asr #32
  900290:	00900064 	addeqs	r0, r0, r4, rrx
  900294:	0000001d 	andeq	r0, r0, sp, lsl r0
  900298:	005f0044 	subeqs	r0, pc, r4, asr #32
  90029c:	00900064 	addeqs	r0, r0, r4, rrx
  9002a0:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002a4:	005f0044 	subeqs	r0, pc, r4, asr #32
  9002a8:	00900068 	addeqs	r0, r0, r8, rrx
  9002ac:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002b0:	005f0044 	subeqs	r0, pc, r4, asr #32
  9002b4:	0090006c 	addeqs	r0, r0, r12, rrx
  9002b8:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002bc:	00600044 	rsbeq	r0, r0, r4, asr #32
  9002c0:	00900070 	addeqs	r0, r0, r0, ror r0
  9002c4:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002c8:	00600044 	rsbeq	r0, r0, r4, asr #32
  9002cc:	00900070 	addeqs	r0, r0, r0, ror r0
  9002d0:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002d4:	00600044 	rsbeq	r0, r0, r4, asr #32
  9002d8:	00900074 	addeqs	r0, r0, r4, ror r0
  9002dc:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002e0:	00600044 	rsbeq	r0, r0, r4, asr #32
  9002e4:	00900078 	addeqs	r0, r0, r8, ror r0
  9002e8:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002ec:	00610044 	rsbeq	r0, r1, r4, asr #32
  9002f0:	0090007c 	addeqs	r0, r0, r12, ror r0
  9002f4:	0000001d 	andeq	r0, r0, sp, lsl r0
  9002f8:	00610044 	rsbeq	r0, r1, r4, asr #32
  9002fc:	0090007c 	addeqs	r0, r0, r12, ror r0
  900300:	0000001d 	andeq	r0, r0, sp, lsl r0
  900304:	00610044 	rsbeq	r0, r1, r4, asr #32
  900308:	00900080 	addeqs	r0, r0, r0, lsl #1
  90030c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900310:	00610044 	rsbeq	r0, r1, r4, asr #32
  900314:	00900084 	addeqs	r0, r0, r4, lsl #1
  900318:	0000001d 	andeq	r0, r0, sp, lsl r0
  90031c:	00620044 	rsbeq	r0, r2, r4, asr #32
  900320:	00900088 	addeqs	r0, r0, r8, lsl #1
  900324:	0000001d 	andeq	r0, r0, sp, lsl r0
  900328:	00620044 	rsbeq	r0, r2, r4, asr #32
  90032c:	00900088 	addeqs	r0, r0, r8, lsl #1
  900330:	0000001d 	andeq	r0, r0, sp, lsl r0
  900334:	00620044 	rsbeq	r0, r2, r4, asr #32
  900338:	0090008c 	addeqs	r0, r0, r12, lsl #1
  90033c:	0000001d 	andeq	r0, r0, sp, lsl r0
  900340:	00620044 	rsbeq	r0, r2, r4, asr #32
  900344:	00900090 	umulleqs	r0, r0, r0, r0
  900348:	0000001d 	andeq	r0, r0, sp, lsl r0
  90034c:	00630044 	rsbeq	r0, r3, r4, asr #32
  900350:	00900094 	umulleqs	r0, r0, r4, r0
  900354:	706d742f 	rsbvc	r7, sp, pc, lsr #8
  900358:	6763632f 	strvsb	r6, [r3, -pc, lsr #6]!
  90035c:	78586443 	ldmvcda	r8, {r0, r1, r6, r10, sp, lr}^
  900360:	00732e4d 	rsbeqs	r2, r3, sp, asr #28
  900364:	64616568 	strvsbt	r6, [r1], -#1384
  900368:	326d645f 	rsbcc	r6, sp, #1593835520	; 0x5f000000
  90036c:	532e3037 	teqpl	lr, #55	; 0x37
  900370:	742f0000 	strvct	r0, [pc], #0	; 900378 <L_STACK_UNTOUCHED_MAGIC+0x28c>
  900374:	632f706d 	teqvs	pc, #109	; 0x6d
  900378:	6e695563 	cdpvs	5, 6, cr5, cr9, cr3, {3}
  90037c:	2e754b62 	cdpcs	11, 7, cr4, cr5, cr2, {3}
  900380:	77680073 	undefined
  900384:	74696e69 	strvcbt	r6, [r9], -#3689