[PATCH v3 1/2] ARM: feroceon: Add suspend/resume operation

[Jason Cooper]

+rmk (oops, forgot to add you the first time around)

On Thu, Aug 22, 2013 at 12:49:06PM -0300, Ezequiel Garcia wrote:
> Add support for suspend/resume operations. The implemented procedures
> are identical to the ones for ARM926.
> 
> Signed-off-by: Ezequiel Garcia <ezequiel.garcia at free-electrons.com>
> ---
>  arch/arm/Kconfig            |  2 +-
>  arch/arm/mm/proc-feroceon.S | 26 ++++++++++++++++++++++++++
>  2 files changed, 27 insertions(+), 1 deletion(-)

Russell,

This is pretty isolated, and the next patch in the series depends on it
for building (it's changes are all in mach-kirkwood/).  Should Ezequiel
push this into your patch tracker (and then could you create a public,
non-rebasable branch containing it?), or can I take it with your Ack?

thx,

Jason.

> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 43594d5..a5111ec 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -2199,7 +2199,7 @@ source "kernel/power/Kconfig"
>  
>  config ARCH_SUSPEND_POSSIBLE
>  	depends on !ARCH_S5PC100
> -	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
> +	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
>  		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
>  	def_bool y
>  
> diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
> index d5146b9..db79b62 100644
> --- a/arch/arm/mm/proc-feroceon.S
> +++ b/arch/arm/mm/proc-feroceon.S
> @@ -514,6 +514,32 @@ ENTRY(cpu_feroceon_set_pte_ext)
>  #endif
>  	mov	pc, lr
>  
> +/* Suspend/resume support: taken from arch/arm/mm/proc-arm926.S */
> +.globl	cpu_feroceon_suspend_size
> +.equ	cpu_feroceon_suspend_size, 4 * 3
> +#ifdef CONFIG_ARM_CPU_SUSPEND
> +ENTRY(cpu_feroceon_do_suspend)
> +	stmfd	sp!, {r4 - r6, lr}
> +	mrc	p15, 0, r4, c13, c0, 0	@ PID
> +	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
> +	mrc	p15, 0, r6, c1, c0, 0	@ Control register
> +	stmia	r0, {r4 - r6}
> +	ldmfd	sp!, {r4 - r6, pc}
> +ENDPROC(cpu_feroceon_do_suspend)
> +
> +ENTRY(cpu_feroceon_do_resume)
> +	mov	ip, #0
> +	mcr	p15, 0, ip, c8, c7, 0	@ invalidate I+D TLBs
> +	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I+D caches
> +	ldmia	r0, {r4 - r6}
> +	mcr	p15, 0, r4, c13, c0, 0	@ PID
> +	mcr	p15, 0, r5, c3, c0, 0	@ Domain ID
> +	mcr	p15, 0, r1, c2, c0, 0	@ TTB address
> +	mov	r0, r6			@ control register
> +	b	cpu_resume_mmu
> +ENDPROC(cpu_feroceon_do_resume)
> +#endif
> +
>  	.type	__feroceon_setup, #function
>  __feroceon_setup:
>  	mov	r0, #0
> -- 
> 1.8.1.5
> 
> 
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