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 --- arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S index d47546a..fc839ea 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 @@ do_lowlevel_init: 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 +64,14 @@ do_lowlevel_init: 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) */ + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #0x40 + mcr p15, 0, r0, c1, c0, 1 + _exit_init_l2_a15: ldr r3, =(CONFIG_SYS_INIT_SP_ADDR) sub sp, r3, #4