arm: rmobile: r8a779x: Fix L2 cache init and latency setting

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>
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 e07cc8093a05510c67ca4bbdd0bcab2f3daea00b..287f8d74afa342534bc5b42a3f2f8793c7ff4ccf 100644 (file)
--- 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.
  *
  * 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
  */
  *
  * SPDX-License-Identifier: GPL-2.0
  */


@@ -36,16 +36,32 @@ do_cpu_waiting:
        .align  4
 do_lowlevel_init:
        /* surpress wfe if ca15 */
        .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
        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
 
        /* 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]
        ldr     r3, =(CONFIG_SYS_INIT_SP_ADDR)
        sub     sp, r3, #4
        str     lr, [sp]