[people/ms/u-boot.git] / examples / api / crt0.S

/*
 * (C) Copyright 2007 Semihalf
 *
 * Written by: Rafal Jaworowski <raj@semihalf.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#if defined(CONFIG_PPC)

	.text
	.globl _start
_start:
	lis	%r11, search_hint@ha
	addi	%r11, %r11, search_hint@l
	stw	%r1, 0(%r11)
	b	main


	.globl syscall
syscall:
	lis	%r11, syscall_ptr@ha
	addi	%r11, %r11, syscall_ptr@l
	lwz	%r11, 0(%r11)
	mtctr	%r11
	bctr

#elif defined(CONFIG_ARM)

	.text
	.globl _start
_start:
	ldr	ip, =search_hint
	str	sp, [ip]
	b	main


	.globl syscall
syscall:
	ldr	ip, =syscall_ptr
	ldr	pc, [ip]

#elif defined(CONFIG_MIPS)
#include <asm/asm.h>
	.text
	.globl __start
	.ent __start
__start:
	PTR_S	$sp, search_hint
	b	main
	.end __start

	.globl syscall
	.ent syscall
syscall:
	PTR_S	$ra, return_addr
	PTR_L	$t9, syscall_ptr
	jalr	$t9
	nop
	PTR_L	$ra, return_addr
	jr	$ra
	nop
	.end syscall

return_addr:
	.align 8
	.long 0
#else
#error No support for this arch!
#endif

	.globl syscall_ptr
syscall_ptr:
	.align	8
	.long	0

	.globl search_hint
search_hint:
	.long   0
Commit	Line	Data
500856eb RJ	1	/*
	2	* (C) Copyright 2007 Semihalf
	3	*
	4	* Written by: Rafal Jaworowski <raj@semihalf.com>
	5	*
1a459660	6	* SPDX-License-Identifier: GPL-2.0+
500856eb RJ	7	*/
	8
	9	#if defined(CONFIG_PPC)
	10
	11	.text
500856eb RJ	12	.globl _start
500856eb RJ	13	_start:
b84d7d8f RJ	14	lis %r11, search_hint@ha
	15	addi %r11, %r11, search_hint@l
	16	stw %r1, 0(%r11)
500856eb RJ	17	b main
	18
	19
	20	.globl syscall
	21	syscall:
	22	lis %r11, syscall_ptr@ha
	23	addi %r11, %r11, syscall_ptr@l
	24	lwz %r11, 0(%r11)
	25	mtctr %r11
	26	bctr
7fb6c4f9 RJ	27
	28	#elif defined(CONFIG_ARM)
	29
	30	.text
	31	.globl _start
	32	_start:
	33	ldr ip, =search_hint
	34	str sp, [ip]
	35	b main
	36
	37
	38	.globl syscall
	39	syscall:
	40	ldr ip, =syscall_ptr
	41	ldr pc, [ip]
	42
7c604231	43	#elif defined(CONFIG_MIPS)
78757d52	44	#include <asm/asm.h>
7c604231 SG	45	.text
	46	.globl __start
	47	.ent __start
	48	__start:
78757d52	49	PTR_S $sp, search_hint
7c604231 SG	50	b main
	51	.end __start
	52
	53	.globl syscall
	54	.ent syscall
	55	syscall:
78757d52 SG	56	PTR_S $ra, return_addr
78757d52 SG	57	PTR_L $t9, syscall_ptr
7c604231 SG	58	jalr $t9
7c604231 SG	59	nop
78757d52	60	PTR_L $ra, return_addr
7c604231 SG	61	jr $ra
	62	nop
	63	.end syscall
	64
	65	return_addr:
78757d52	66	.align 8
7c604231	67	.long 0
b84d7d8f RJ	68	#else
	69	#error No support for this arch!
	70	#endif
500856eb RJ	71
	72	.globl syscall_ptr
	73	syscall_ptr:
78757d52	74	.align 8
500856eb	75	.long 0
b84d7d8f RJ	76
	77	.globl search_hint
	78	search_hint:
	79	.long 0