u-boot/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
Simon Glass e11c6c279d arm: Allow lr to be saved by board code
The link register value can be required on some boards (e.g. FEL mode on
sunxi) so use a branch instruction to jump to save_boot_params() instead
of a branch link.

This requires a branch back to save_boot_params_ret so adjust the users
to deal with this. For exynos just drop the function since it doesn't
do anything.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-02-16 20:14:54 +01:00

32 lines
763 B
ArmAsm

/*
* Board specific setup info
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Author :
* Aneesh V <aneesh@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <asm/arch/omap.h>
#include <asm/omap_common.h>
#include <asm/arch/spl.h>
#include <linux/linkage.h>
ENTRY(save_boot_params)
ldr r1, =OMAP_SRAM_SCRATCH_BOOT_PARAMS
str r0, [r1]
b save_boot_params_ret
ENDPROC(save_boot_params)
ENTRY(set_pl310_ctrl_reg)
PUSH {r4-r11, lr} @ save registers - ROM code may pollute
@ our registers
LDR r12, =0x102 @ Set PL310 control register - value in R0
.word 0xe1600070 @ SMC #0 - hand assembled because -march=armv5
@ call ROM Code API to set control register
POP {r4-r11, pc}
ENDPROC(set_pl310_ctrl_reg)