From ec6617c39741adc6c54952564579e32c3c09c66f Mon Sep 17 00:00:00 2001 From: Alison Wang Date: Thu, 10 Nov 2016 10:49:03 +0800 Subject: armv8: Support loading 32-bit OS in AArch32 execution state To support loading a 32-bit OS, the execution state will change from AArch64 to AArch32 when jumping to kernel. The architecture information will be got through checking FIT image, then U-Boot will load 32-bit OS or 64-bit OS automatically. Signed-off-by: Ebony Zhu Signed-off-by: Alison Wang Signed-off-by: Chenhui Zhao Reviewed-by: York Sun --- arch/arm/mach-rmobile/lowlevel_init_gen3.S | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-rmobile') diff --git a/arch/arm/mach-rmobile/lowlevel_init_gen3.S b/arch/arm/mach-rmobile/lowlevel_init_gen3.S index 88ff56ecbf..11acce0395 100644 --- a/arch/arm/mach-rmobile/lowlevel_init_gen3.S +++ b/arch/arm/mach-rmobile/lowlevel_init_gen3.S @@ -61,11 +61,18 @@ ENTRY(lowlevel_init) /* * All slaves will enter EL2 and optionally EL1. */ + adr x3, lowlevel_in_el2 + ldr x4, =ES_TO_AARCH64 bl armv8_switch_to_el2 + +lowlevel_in_el2: #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 + adr x3, lowlevel_in_el1 + ldr x4, =ES_TO_AARCH64 bl armv8_switch_to_el1 -#endif +lowlevel_in_el1: +#endif #endif /* CONFIG_ARMV8_MULTIENTRY */ bl s_init -- cgit v1.2.1