u-boot/arch/arm/mach-imx/imx8m/lowlevel_init.S
Peng Fan 4557f43a10 imx8m: lowlevel_init: tune alignment
The minimum alignment is 16 bytes, so use align 4 is enough.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-23 11:30:31 +01:00

74 lines
1.4 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2017 NXP
*/
#include <config.h>
.align 4
.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
.global armv8_el2_to_aarch32
armv8_el2_to_aarch32:
cmp x0, #0
bne 0f
mov x3, x2
mov x2, x1
mov x1, x4
ldr x0, =0xc20000fd
0:
smc #0
ret