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arm: omap3: Directly use SMC #1 in lowlevel_init.S

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Since commit de39dc7162 ("arm: armv7-a: Compile and tune for armv7-a
instead of armv5") is used -march=armv7-a option for Omap3 platforms.

With directive ".arch_extension sec" it is possible for -march=armv7-a to
directly use ARM SMC instruction.

So enable ".arch_extension sec" in Omap3 lowlevel_init.S and replace hand
assembled ".word 0xe1600071" by "SMC #1".

Since commit 51d0638650 ("arm: omap-common: add secure smc entry") same
pattern is already used in arch/arm/cpu/armv7/omap-common/lowlevel_init.S.

Signed-off-by: Pali Rohár <pali@kernel.org>
This commit is contained in:
Pali Rohár 2023-04-13 22:34:43 +02:00 committed by Tom Rini
parent 51e0cacca7
commit 7add47959e
1 changed files with 3 additions and 3 deletions
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6
arch/arm/mach-omap2/omap3/lowlevel_init.S
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@ -15,13 +15,14 @@
#include <asm/arch/clocks_omap3.h>
#include <linux/linkage.h>
.arch_extension sec
/*
* Funtion for making PPA HAL API calls in secure devices
* Input:
* R0 - Service ID
* R1 - paramer list
*/
/* TODO: Re-evaluate the comment at the end regarding armv5 vs armv7 */
ENTRY(do_omap3_emu_romcode_call)
PUSH {r4-r12, lr} @ Save all registers from ROM code!
MOV r12, r0 @ Copy the Secure Service ID in R12
@ -32,8 +33,7 @@ ENTRY(do_omap3_emu_romcode_call)
MOV r6, #0xFF @ Indicate new Task call
mcr p15, 0, r0, c7, c10, 4 @ DSB
mcr p15, 0, r0, c7, c10, 5 @ DMB
.word 0xe1600071 @ SMC #1 to call PPA service - hand assembled
@ because we use -march=armv5
SMC #1 @ Call PPA service
POP {r4-r12, pc}
ENDPROC(do_omap3_emu_romcode_call)