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authorNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>2014-08-08 08:44:02 +0900
committerNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>2014-10-09 14:45:03 +0900
commit88982893c4d50692b80a2155146cda9e42266c6b (patch)
tree6deabe404924ddcd958ea790c864185be77bbb33 /arch/arm
parent237faf095fb43abbed6e40266ef7efccc8b9308b (diff)
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arm: rmobile: r8a7794: Skip initialize L2 cache
rmobile/lowlevel_init_ca15.S are common in r8a7790, r8a7791 and r8a7794 of rmobile SoCs. The initialize L2 cache in lowlevel_init_ca15.S only needed for Cortex-A15. The r8a7794 is Cortex-A7, not Cortex-A15. This adds Skip to initialize L2 cache when r8a7794. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
index 5820e1a..879e0e0 100644
--- a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
+++ b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
@@ -35,6 +35,13 @@ do_cpu_waiting:
*/
.align 4
do_lowlevel_init:
+ ldr r2, =0xFF000044 /* PRR */
+ ldr r1, [r2]
+ and r1, r1, #0x7F00
+ lsrs r1, r1, #8
+ cmp r1, #0x4C /* 0x4C is ID of r8a7794 */
+ beq _exit_init_l2_a15
+
/* surpress wfe if ca15 */
tst r4, #4
mrceq p15, 0, r0, c1, c0, 1 /* actlr */