arm64: split cpu.h header

Add a cpu-internal.h for internal prototypes to the
architecture specific code.

BUG=chrome-os-partner:31761
BRANCH=None
TEST=Built and booted.

Change-Id: I12a379f86056a9a2007a7c036d65b5e08e558d0e
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 5dcd488326f6496d80eb1fe1ff4414ebba1280e9
Original-Change-Id: I8ab520478954a3b43e8e0831d1883f9a791850aa
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/216924
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9041
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/arch/arm64/c_entry.c b/src/arch/arm64/c_entry.c
index 8695187..e2aa4e5 100644
--- a/src/arch/arm64/c_entry.c
+++ b/src/arch/arm64/c_entry.c
@@ -22,6 +22,7 @@
 #include <arch/exception.h>
 #include <arch/mmu.h>
 #include <arch/stages.h>
+#include "cpu-internal.h"
 
 /*
  * This variable holds entry point for CPUs starting up. Before the other
diff --git a/src/arch/arm64/cpu-internal.h b/src/arch/arm64/cpu-internal.h
new file mode 100644
index 0000000..3773ff2
--- /dev/null
+++ b/src/arch/arm64/cpu-internal.h
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef ARCH_CPU_INTERNAL_H
+#define ARCH_CPU_INTERNAL_H
+
+/* Return the top of the stack for the specified cpu. */
+void *cpu_get_stack(unsigned int cpu);
+
+/* Return the top of the exception stack for the specified cpu. */
+void *cpu_get_exception_stack(unsigned int cpu);
+
+#endif /* ARCH_CPU_INTERNAL_H */
diff --git a/src/arch/arm64/include/armv8/arch/cpu.h b/src/arch/arm64/include/armv8/arch/cpu.h
index 5ce9ba3..b2c28f6 100644
--- a/src/arch/arm64/include/armv8/arch/cpu.h
+++ b/src/arch/arm64/include/armv8/arch/cpu.h
@@ -52,12 +52,6 @@
  */
 unsigned int smp_processor_id(void);
 
-/* Return the top of the stack for the specified cpu. */
-void *cpu_get_stack(unsigned int cpu);
-
-/* Return the top of the exception stack for the specified cpu. */
-void *cpu_get_exception_stack(unsigned int cpu);
-
 /*
  * Do the necessary work to prepare for secondary CPUs coming up. The
  * SoC will call this function before bringing up the other CPUs. The