[OpenBIOS] [PATCH 4/4] ppc64: Set SF bit before entering ELF binary

[Andreas Färber]

Am 15.12.2010 um 01:11 schrieb Andreas Färber:

> Signed-off-by: Andreas Färber <andreas.faerber at web.de>
> ---
> arch/ppc/qemu/start.S        |    4 ++++
> include/arch/ppc/processor.h |    2 ++
> 2 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/arch/ppc/qemu/start.S b/arch/ppc/qemu/start.S
> index 7846463..0fc4496 100644
> --- a/arch/ppc/qemu/start.S
> +++ b/arch/ppc/qemu/start.S
> @@ -494,7 +494,11 @@ _GLOBAL(call_elf):
> 	LOAD_REG_IMMEDIATE(r5, of_client_callback)	// r5 = callback
> 	li	r6,0			// r6 = address of client program arguments (unused)
> 	li	r7,0			// r7 = length of client program arguments (unused)
> +#ifdef CONFIG_PPC64
> +    LOAD_REG_IMMEDIATE(r0, MSR_SF | MSR_FP | MSR_ME | MSR_DR |  
> MSR_IR)

Setting SF here is what breaks Debian GNU/Linux. AIX seems unaffected  
as far as tested.

> +#else
> 	li	r0,MSR_FP | MSR_ME | MSR_DR | MSR_IR
> +#endif
> 	MTMSRD(r0)
> 	blrl
>
> diff --git a/include/arch/ppc/processor.h b/include/arch/ppc/ 
> processor.h
> index 21e4fab..e00fea0 100644
> --- a/include/arch/ppc/processor.h
> +++ b/include/arch/ppc/processor.h
> @@ -40,6 +40,8 @@
>
> #ifndef MSR_VEC
>
> +#define MSR_SF      (1<<63)     /* Sixty-Four Bit Mode */
> +
> #define MSR_VEC		(1<<25)		/*  6: Enable AltiVec */
> #define MSR_POW		(1<<18)		/* 13: Enable Power Management */
> #define MSR_TGPR	(1<<17)		/* 14: TLB Update registers in use */
> -- 
> 1.7.3
>
>
> -- 
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