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imx: add lowlevel init for ARM64

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Sometimes we met SERROR, but only to catch it when Linux boots up.
Let's enable catching in U-Boot to catch it ealier and ease debug.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2019-04-15 05:20:43 +00:00 committed by Stefano Babic
parent 4eceb4bc8b
commit 7a0c9b0888
2 changed files with 23 additions and 1 deletions
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2
arch/arm/mach-imx/Makefile
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@ -204,7 +204,7 @@ endif
targets += $(addprefix ../../../,SPL spl/u-boot-spl.cfgout u-boot-dtb.cfgout u-boot.cfgout u-boot.uim spl/u-boot-nand-spl.imx)
obj-$(CONFIG_ARM64) += sip.o
obj-$(CONFIG_ARM64) += lowlevel.o sip.o
obj-$(CONFIG_MX5) += mx5/
obj-$(CONFIG_MX6) += mx6/

22
arch/arm/mach-imx/lowlevel.S Normal file
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@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2019 NXP
*/
#include <linux/linkage.h>
ENTRY(lowlevel_init)
mrs x0, CurrentEL
cmp x0, #8
b.eq 1f
ret
1:
msr daifclr, #4
/* set HCR_EL2.AMO to catch SERROR */
mrs x0, hcr_el2
orr x0, x0, #0x20
msr hcr_el2, x0
isb
ret
ENDPROC(lowlevel_init)