1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm/mach-rmobile/lowlevel_init_ca15.S b/arch/arm/mach-rmobile/lowlevel_init_ca15.S
new file mode 100644
index 0000000..a5dbbea
--- /dev/null
+++ b/arch/arm/mach-rmobile/lowlevel_init_ca15.S
@@ -0,0 +1,89 @@
+/*
+ * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
+ *     This file is lager low level initialize.
+ *
+ * Copyright (C) 2013, 2014 Renesas Electronics Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <config.h>
+#include <linux/linkage.h>
+
+ENTRY(lowlevel_init)
+	mrc	p15, 0, r4, c0, c0, 5 /* mpidr */
+	orr	r4, r4, r4, lsr #6
+	and	r4, r4, #7 /* id 0-3 = ca15.0,1,2,3 */
+
+	b do_lowlevel_init
+
+	.pool
+
+/*
+ * CPU ID #1-#3 come here
+ */
+	.align  4
+do_cpu_waiting:
+	ldr	r1, =0xe6180000 /* sysc */
+1:	ldr	r0, [r1, #0x20] /* sbar */
+	tst	r0, r0
+	beq	1b
+	bx	r0
+
+/*
+ * Only CPU ID #0 comes here
+ */
+	.align  4
+do_lowlevel_init:
+	ldr	r2, =0xFF000044		/* PRR */
+	ldr	r1, [r2]
+	and	r1, r1, #0x7F00
+	lsrs	r1, r1, #8
+	cmp	r1, #0x4C		/* 0x4C is ID of r8a7794 */
+	beq	_enable_actlr_smp
+
+	/* surpress wfe if ca15 */
+	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 */
+	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] */
+#if defined(CONFIG_R8A7790)
+	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
+	str	lr, [sp]
+
+	/* initialize system */
+	bl s_init
+
+	ldr	lr, [sp]
+	mov	pc, lr
+	nop
+ENDPROC(lowlevel_init)
+	.ltorg