__ARM_ARCH_2__

[Andrew Haley]

On 08/08/2013 08:20 AM, zhaobin xv wrote:

> 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?

http://en.wikipedia.org/wiki/List_of_ARM_microprocessor_cores

Andrew.