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Diffstat (limited to 'arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S')
-rw-r--r--arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
new file mode 100644
index 0000000..e07cc80
--- /dev/null
+++ b/arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
@@ -0,0 +1,60 @@
+/*
+ * arch/arm/cpu/armv7/rmobile/lowlevel_init_ca15.S
+ * This file is lager low level initialize.
+ *
+ * Copyright (C) 2013 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:
+ /* 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 */
+ mrceq p15, 1, r0, c9, c0, 2 /* l2ctlr */
+ orreq r0, r0, #0x00000800
+ orreq r0, r0, #0x00000003
+ mcreq p15, 1, r0, c9, c0, 2
+
+ 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