L2CTLR only need to update for cluster 0. This changes L2CTLR to initialize only when cluster is 0.
Signed-off-by: Nobuhiro Iwamatsu nobuhiro.iwamatsu.yj@renesas.com --- arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S index e07cc80..287f8d7 100644 --- a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S +++ b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S @@ -2,7 +2,7 @@ * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S * This file is lager low level initialize. * - * Copyright (C) 2013 Renesas Electronics Corporation + * Copyright (C) 2013, 2014 Renesas Electronics Corporation * * SPDX-License-Identifier: GPL-2.0 */ @@ -36,16 +36,32 @@ do_cpu_waiting: .align 4 do_lowlevel_init: /* surpress wfe if ca15 */ - tst r4, #4 + tst r4, #4 mrceq p15, 0, r0, c1, c0, 1 /* actlr */ orreq r0, r0, #(1<<7) mcreq p15, 0, r0, c1, c0, 1 + /* and set l2 latency */ mrceq p15, 1, r0, c9, c0, 2 /* l2ctlr */ orreq r0, r0, #0x00000800 orreq r0, r0, #0x00000003 mcreq p15, 1, r0, c9, c0, 2
+ mrc p15, 0, r0, c0, c0, 5 /* r0 = MPIDR */ + and r0, r0, #0xf00 + lsr r0, r0, #8 + tst r0, #1 /* only need for cluster 0 */ + bne _exit_init_l2_a15 + + mrc p15, 1, r0, c9, c0, 2 /* r0 = L2CTLR */ + and r1, r0, #7 + cmp r1, #3 /* has already been set up */ + bicne r0, r0, #0xe7 + orrne r0, r0, #0x83 /* L2CTLR[7:6] + L2CTLR[2:0] */ + orrne r0, r0, #0x20 /* L2CTLR[5] */ + mcrne p15, 1, r0, c9, c0, 2 + +_exit_init_l2_a15: ldr r3, =(CONFIG_SYS_INIT_SP_ADDR) sub sp, r3, #4 str lr, [sp]