[U-Boot] [PATCH V3 05/11] ARM: OMAP: Change set_pl310_ctrl_reg to be generic

[Tom Rini]

On Tue, Mar 03, 2015 at 11:12:33AM -0600, Nishanth Menon wrote:
> On 03/03/2015 11:08 AM, Tom Rini wrote:
> > On Wed, Feb 25, 2015 at 02:55:13PM -0600, Nishanth Menon wrote:
> > 
> >> set_pl310_ctrl_reg does use the Secure Monitor Call (SMC) to setup
> >> PL310 control register, however, that is something that is generic
> >> enough to be used for OMAP5 generation of processors as well. The
> >> only difference being the service being invoked for the function.
> >>
> >> So, convert the service to a macro and use a generic name (same as
> >> that used in Linux for some consistency). While at that, also add
> >> a data barrier which is necessary as per recommendation.
> >>
> >> Signed-off-by: Nishanth Menon <nm at ti.com>
> >> ---
> >>  arch/arm/cpu/armv7/omap-common/lowlevel_init.S |   13 ++++++++-----
> >>  arch/arm/cpu/armv7/omap4/hwinit.c              |    4 ++--
> >>  arch/arm/include/asm/arch-omap4/sys_proto.h    |    5 ++++-
> >>  3 files changed, 14 insertions(+), 8 deletions(-)
> >>
> >> diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
> >> index 86c0e4217478..9b24369e4dc1 100644
> >> --- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
> >> +++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
> >> @@ -22,11 +22,14 @@ ENTRY(save_boot_params)
> >>  	bx	lr
> >>  ENDPROC(save_boot_params)
> >>  
> >> -ENTRY(set_pl310_ctrl_reg)
> >> -	PUSH	{r4-r11, lr}	@ save registers - ROM code may pollute
> >> +ENTRY(omap_smc1)
> >> +	PUSH	{r4-r12, lr}	@ save registers - ROM code may pollute
> >>  				@ our registers
> >> -	LDR	r12, =0x102	@ Set PL310 control register - value in R0
> >> +	MOV	r12, r0		@ Service
> >> +	MOV	r0, r1		@ Argument
> >> +	DSB
> >> +	DMB
> >>  	.word	0xe1600070	@ SMC #0 - hand assembled because -march=armv5
> >>  				@ call ROM Code API to set control register
> > 
> > Lets stop hand-crafting that call, we just call smc #0 elsewhere in the
> > code base these days.
> > 
> And we dont care about: -march=armv5 any-longer?

No, that's not a use-case for these boards any longer, toolchains old
enough to not know -march=armv7t are going to have other problems.

-- 
Tom
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