diff options
| author | Nishanth Menon <nm@ti.com> | 2015-03-09 22:12:03 (GMT) |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-03-13 13:28:55 (GMT) |
| commit | 6d8abe6a8a5981685687a0f2fd660e034d974824 (patch) | |
| tree | 374b51e0afea70f54fecf878efb89715da66d279 /arch/arm/cpu/armv7/omap-common/lowlevel_init.S | |
| parent | 9b4d65f918dd84a479552b86ef2cde389926738f (diff) | |
| download | u-boot-6d8abe6a8a5981685687a0f2fd660e034d974824.tar.xz | |
ARM: OMAP: Change set_pl310_ctrl_reg to be generic
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.
While at this, smc #0 is maintained as handcoded assembly thanks to
various gcc version eccentricities, discussion thread:
http://marc.info/?t=142542166800001&r=1&w=2
Signed-off-by: Nishanth Menon <nm@ti.com>
Tested-by: Matt Porter <mporter@konsulko.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/lowlevel_init.S')
| -rw-r--r-- | arch/arm/cpu/armv7/omap-common/lowlevel_init.S | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S index e19c7ae..80619b0 100644 --- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S +++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S @@ -22,11 +22,15 @@ ENTRY(save_boot_params) b save_boot_params_ret 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 - .word 0xe1600070 @ SMC #0 - hand assembled because -march=armv5 - @ call ROM Code API to set control register - POP {r4-r11, pc} -ENDPROC(set_pl310_ctrl_reg) + MOV r12, r0 @ Service + MOV r0, r1 @ Argument + DSB + DMB + .word 0xe1600070 @ SMC #0 - hand assembled for GCC versions + @ call ROM Code API for the service requested + + POP {r4-r12, pc} +ENDPROC(omap_smc1) |