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armv7: Mark the default lowlevel_init function as weak

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Rather than have a long and if check in the Makefile, mark the default
lowlevel_init function as weak (as we do on armv8) so that SoCs can
override it if needed, and it will still be discarded if unused.
Provide a weak s_init as well to allow for this to link and be
discarded.

Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini 2017-05-16 14:46:34 -04:00
parent 7c0c6be52c
commit ffb5656862
2 changed files with 9 additions and 3 deletions
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2
arch/arm/cpu/armv7/Makefile
View File

@ -12,11 +12,9 @@ obj-y += cache_v7.o cache_v7_asm.o
obj-y += cpu.o cp15.o
obj-y += syslib.o
ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_MX7)$(CONFIG_TI81XX)$(CONFIG_AT91FAMILY)$(CONFIG_ARCH_SUNXI)$(CONFIG_ARCH_SOCFPGA)$(CONFIG_ARCH_MX7ULP)$(CONFIG_ARCH_LS1021A),)
ifneq ($(CONFIG_SKIP_LOWLEVEL_INIT),y)
obj-y += lowlevel_init.o
endif
endif
obj-$(CONFIG_ARM_SMCCC) += smccc-call.o
obj-$(CONFIG_ARMV7_NONSEC) += nonsec_virt.o virt-v7.o virt-dt.o

10
arch/arm/cpu/armv7/lowlevel_init.S
View File

@ -15,7 +15,14 @@
#include <config.h>
#include <linux/linkage.h>
ENTRY(lowlevel_init)
.pushsection .text.s_init, "ax"
WEAK(s_init)
bx lr
ENDPROC(s_init)
.popsection
.pushsection .text.lowlevel_init, "ax"
WEAK(lowlevel_init)
/*
* Setup a temporary stack. Global data is not available yet.
*/
@ -61,3 +68,4 @@ ENTRY(lowlevel_init)
bl s_init
pop {ip, pc}
ENDPROC(lowlevel_init)
.popsection