2 * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
3 * This file is lager low level initialize.
5 * Copyright (C) 2013, 2014 Renesas Electronics Corporation
7 * SPDX-License-Identifier: GPL-2.0
11 #include <linux/linkage.h>
14 mrc p15, 0, r4, c0, c0, 5 /* mpidr */
15 orr r4, r4, r4, lsr #6
16 and r4, r4, #7 /* id 0-3 = ca15.0,1,2,3 */
23 * CPU ID #1-#3 come here
27 ldr r1, =0xe6180000 /* sysc */
28 1: ldr r0, [r1, #0x20] /* sbar */
34 * Only CPU ID #0 comes here
38 /* surpress wfe if ca15 */
40 mrceq p15, 0, r0, c1, c0, 1 /* actlr */
42 mcreq p15, 0, r0, c1, c0, 1
44 /* and set l2 latency */
45 mrc p15, 0, r0, c0, c0, 5 /* r0 = MPIDR */
48 tst r0, #1 /* only need for cluster 0 */
51 mrc p15, 1, r0, c9, c0, 2 /* r0 = L2CTLR */
53 cmp r1, #3 /* has already been set up */
55 orrne r0, r0, #0x83 /* L2CTLR[7:6] + L2CTLR[2:0] */
56 orrne r0, r0, #0x20 /* L2CTLR[5] */
57 mcrne p15, 1, r0, c9, c0, 2
60 ldr r3, =(CONFIG_SYS_INIT_SP_ADDR)
64 /* initialize system */
70 ENDPROC(lowlevel_init)