splstartup.s

来自「mx21的NAND Flash Bootloader源代码」· S 代码 · 共 45 行

//	.extern	main
	.global	_start
//	.extern	__end_data

//	b		_start		// this line is mainly for debugging with bootstrap mode
							// so that the first line of b-record is executed correctly
	//.equ		ImageSize,		__end_data - 0xc3000000
	//.long		ImageSize

_start:
	ldr	r1,=StackInit
	and     r1,r1,#3
	ldr	sp,[r1]
//wokao: b wokao
	bl		main
	ldr	r1,=0xC03FF000	//command line address
	mov	pc,r0

	.equ		StackInitValue,	__end_data+0x1000		// 4K

StackInit:
	.long		StackInitValue

 	//.global	JumpToKernel
//	r0 = jump address
//	r1 = pointer to command line
//JumpToKernel:
//	jump to the copy code (get the arguments right)
	//mov	pc, r0

 	//.global	JumpToKernel0x
//	r0 = jump address
//	r1-r4 = arguments to use (these get shifted)
//JumpToKernel0x:
//	jump to the copy code (get the arguments right)
	//mov	r8, r0
	//mov	r0, r1
	//mov	r1, r2
	//mov	r2, r3
	//mov	r3, r4
	//mov	pc, r8
.section ".data.boot"
.section ".bss.boot"