Hi
In linux/arch/arm/boot/
compressed/head.S:
#ifndef __ARM_ARCH_2__
/*
* Booting from Angel - need to enter SVC mode and disable
* FIQs/IRQs (numeric definitions from angel arm.h source).
* We only do this if we were in user mode on entry.
*/
mrs r2, cpsr @ get current mode
tst r2, #3 @ not user?
bne not_angel
mov r0, #0x17 @ angel_SWIreason_EnterSVC
swi 0x123456 @ angel_SWI_ARM
I don't know what the"__ARM_ARCH_2__" mean?
"__ARM_ARCH_2__" is definded by gcc or definded byarmlinux?
where does it come from? what does it want to do?
