[thirdparty/u-boot.git] / arch / arm / mach-imx / mx8m / lowlevel_init.S

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright 2017 NXP
 */

#include <config.h>

.align 8
.global rom_pointer
rom_pointer:
	.space 256

/*
 * Routine: save_boot_params (called after reset from start.S)
 */

.global save_boot_params
save_boot_params:
	/* The firmware provided ATAG/FDT address can be found in r2/x0 */
	adr	x0, rom_pointer
	stp	x1, x2, [x0], #16
	stp	x3, x4, [x0], #16
	stp	x5, x6, [x0], #16
	stp	x7, x8, [x0], #16
	stp	x9, x10, [x0], #16
	stp	x11, x12, [x0], #16
	stp	x13, x14, [x0], #16
	stp	x15, x16, [x0], #16
	stp	x17, x18, [x0], #16
	stp	x19, x20, [x0], #16
	stp	x21, x22, [x0], #16
	stp	x23, x24, [x0], #16
	stp	x25, x26, [x0], #16
	stp	x27, x28, [x0], #16
	stp	x29, x30, [x0], #16
	mov	x30, sp
	str	x30, [x0], #8

	/* Returns */
	b	save_boot_params_ret

.global restore_boot_params
restore_boot_params:
	adr	x0, rom_pointer
	ldp	x1, x2, [x0], #16
	ldp	x3, x4, [x0], #16
	ldp	x5, x6, [x0], #16
	ldp	x7, x8, [x0], #16
	ldp	x9, x10, [x0], #16
	ldp	x11, x12, [x0], #16
	ldp	x13, x14, [x0], #16
	ldp	x15, x16, [x0], #16
	ldp	x17, x18, [x0], #16
	ldp	x19, x20, [x0], #16
	ldp	x21, x22, [x0], #16
	ldp	x23, x24, [x0], #16
	ldp	x25, x26, [x0], #16
	ldp	x27, x28, [x0], #16
	ldp	x29, x30, [x0], #16
	ldr	x0, [x0]
	mov	sp, x0
	ret
Commit	Line	Data
83d290c5	1	/* SPDX-License-Identifier: GPL-2.0+ */
fcdbde7c PF	2	/*
fcdbde7c PF	3	* Copyright 2017 NXP
fcdbde7c PF	4	*/
	5
	6	#include <config.h>
	7
	8	.align 8
	9	.global rom_pointer
	10	rom_pointer:
	11	.space 256
	12
	13	/*
	14	* Routine: save_boot_params (called after reset from start.S)
	15	*/
	16
	17	.global save_boot_params
	18	save_boot_params:
	19	/* The firmware provided ATAG/FDT address can be found in r2/x0 */
	20	adr x0, rom_pointer
	21	stp x1, x2, [x0], #16
	22	stp x3, x4, [x0], #16
	23	stp x5, x6, [x0], #16
	24	stp x7, x8, [x0], #16
	25	stp x9, x10, [x0], #16
	26	stp x11, x12, [x0], #16
	27	stp x13, x14, [x0], #16
	28	stp x15, x16, [x0], #16
	29	stp x17, x18, [x0], #16
	30	stp x19, x20, [x0], #16
	31	stp x21, x22, [x0], #16
	32	stp x23, x24, [x0], #16
	33	stp x25, x26, [x0], #16
	34	stp x27, x28, [x0], #16
	35	stp x29, x30, [x0], #16
	36	mov x30, sp
	37	str x30, [x0], #8
	38
	39	/* Returns */
	40	b save_boot_params_ret
	41
	42	.global restore_boot_params
	43	restore_boot_params:
	44	adr x0, rom_pointer
	45	ldp x1, x2, [x0], #16
	46	ldp x3, x4, [x0], #16
	47	ldp x5, x6, [x0], #16
	48	ldp x7, x8, [x0], #16
	49	ldp x9, x10, [x0], #16
	50	ldp x11, x12, [x0], #16
	51	ldp x13, x14, [x0], #16
	52	ldp x15, x16, [x0], #16
	53	ldp x17, x18, [x0], #16
	54	ldp x19, x20, [x0], #16
	55	ldp x21, x22, [x0], #16
	56	ldp x23, x24, [x0], #16
	57	ldp x25, x26, [x0], #16
	58	ldp x27, x28, [x0], #16
	59	ldp x29, x30, [x0], #16
	60	ldr x0, [x0]
	61	mov sp, x0
	62	ret