arm: rmobile: r8a7794: Enable SMP mode of Auxiliary Control Register
r8a7794 uses ARM SoC of CA7 base. If we want to use dcache on CA7, we
need to enable SMP bit of Auxiliary Control Register.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
index d47546a..a5dbbea 100644
--- a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
+++ b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
@@ -40,7 +40,7 @@
and r1, r1, #0x7F00
lsrs r1, r1, #8
cmp r1, #0x4C /* 0x4C is ID of r8a7794 */
- beq _exit_init_l2_a15
+ beq _enable_actlr_smp
/* surpress wfe if ca15 */
tst r4, #4
@@ -64,6 +64,16 @@
orrne r0, r0, #0x20 /* L2CTLR[5] */
#endif
mcrne p15, 1, r0, c9, c0, 2
+
+ b _exit_init_l2_a15
+
+_enable_actlr_smp: /* R8A7794 only (CA7) */
+#ifndef CONFIG_DCACHE_OFF
+ mrc p15, 0, r0, c1, c0, 1
+ orr r0, r0, #0x40
+ mcr p15, 0, r0, c1, c0, 1
+#endif
+
_exit_init_l2_a15:
ldr r3, =(CONFIG_SYS_INIT_SP_ADDR)
sub sp, r3, #4