[PATCH] powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg

[Dongsheng.Wang at freescale.com]

Looks good. I will test it as soon as possible. 

BTW, there is only SPRG3 need to save.
32bit: SPRG0-SPRG1, SPRG2-SPRG7, SPRG9 be use to deal with exception,
those register not need to save.(SPRG8 not be used) Only SPRG3 be used
to save current thread_info pointer.

-Dongsheng

> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Friday, January 03, 2014 6:38 AM
> To: Benjamin Herrenschmidt
> Cc: linuxppc-dev at lists.ozlabs.org; Wood Scott-B07421; Wang Dongsheng-B40534;
> Anton Vorontsov
> Subject: [PATCH] powerpc/fsl-booke: Use SPRN_SPRGn rather than mfsprg/mtsprg
> 
> This fixes a build break that was probably introduced with the removal
> of -Wa,-me500 (commit f49596a4cf4753d13951608f24f939a59fdcc653), where
> the assembler refuses to recognize SPRG4-7 with a generic PPC target.
> 
> Signed-off-by: Scott Wood <scottwood at freescale.com>
> Cc: Dongsheng Wang <dongsheng.wang at freescale.com>
> Cc: Anton Vorontsov <avorontsov at mvista.com>
> ---
> Dongsheng, please test.
> ---
>  arch/powerpc/kernel/swsusp_booke.S | 32 ++++++++++++++++----------------
>  1 file changed, 16 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/swsusp_booke.S
> b/arch/powerpc/kernel/swsusp_booke.S
> index 0f20405..553c140 100644
> --- a/arch/powerpc/kernel/swsusp_booke.S
> +++ b/arch/powerpc/kernel/swsusp_booke.S
> @@ -74,21 +74,21 @@ _GLOBAL(swsusp_arch_suspend)
>  	bne	1b
> 
>  	/* Save SPRGs */
> -	mfsprg	r4,0
> +	mfspr	r4,SPRN_SPRG0
>  	stw	r4,SL_SPRG0(r11)
> -	mfsprg	r4,1
> +	mfspr	r4,SPRN_SPRG1
>  	stw	r4,SL_SPRG1(r11)
> -	mfsprg	r4,2
> +	mfspr	r4,SPRN_SPRG2
>  	stw	r4,SL_SPRG2(r11)
> -	mfsprg	r4,3
> +	mfspr	r4,SPRN_SPRG3
>  	stw	r4,SL_SPRG3(r11)
> -	mfsprg	r4,4
> +	mfspr	r4,SPRN_SPRG4
>  	stw	r4,SL_SPRG4(r11)
> -	mfsprg	r4,5
> +	mfspr	r4,SPRN_SPRG5
>  	stw	r4,SL_SPRG5(r11)
> -	mfsprg	r4,6
> +	mfspr	r4,SPRN_SPRG6
>  	stw	r4,SL_SPRG6(r11)
> -	mfsprg	r4,7
> +	mfspr	r4,SPRN_SPRG7
>  	stw	r4,SL_SPRG7(r11)
> 
>  	/* Call the low level suspend stuff (we should probably have made
> @@ -150,21 +150,21 @@ _GLOBAL(swsusp_arch_resume)
>  	bl	_tlbil_all
> 
>  	lwz	r4,SL_SPRG0(r11)
> -	mtsprg	0,r4
> +	mtspr	SPRN_SPRG0,r4
>  	lwz	r4,SL_SPRG1(r11)
> -	mtsprg	1,r4
> +	mtspr	SPRN_SPRG1,r4
>  	lwz	r4,SL_SPRG2(r11)
> -	mtsprg	2,r4
> +	mtspr	SPRN_SPRG2,r4
>  	lwz	r4,SL_SPRG3(r11)
> -	mtsprg	3,r4
> +	mtspr	SPRN_SPRG3,r4
>  	lwz	r4,SL_SPRG4(r11)
> -	mtsprg	4,r4
> +	mtspr	SPRN_SPRG4,r4
>  	lwz	r4,SL_SPRG5(r11)
> -	mtsprg	5,r4
> +	mtspr	SPRN_SPRG5,r4
>  	lwz	r4,SL_SPRG6(r11)
> -	mtsprg	6,r4
> +	mtspr	SPRN_SPRG6,r4
>  	lwz	r4,SL_SPRG7(r11)
> -	mtsprg	7,r4
> +	mtspr	SPRN_SPRG7,r4
> 
>  	/* restore the MSR */
>  	lwz	r3,SL_MSR(r11)
> --
> 1.8.3.2