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

[Nishanth Menon]

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?

-- 
Regards,
Nishanth Menon