libpayload: Add support for arm64 in libpayload

Basic support for arm64 is enabled in libpayload.
Features added:
1) mem* operations in assembly.
2) Basic exception handling and support for testing exceptions.
3) Caching support.

Tested with arm64-generic board compilation.

BUG=None
BRANCH=None
TEST=Compilation successful

Original-Change-Id: I4e86301f9c6383abc078e2b70071fb84bd6e4741
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/187067
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit a70d13f3d225535843ab352290eab2e1ec7a9b4b)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ie3affe6a2bdd4fed3058de739d4c6aa573e5b251
Reviewed-on: http://review.coreboot.org/8063
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/payloads/libpayload/include/arm64/arch/asm.h b/payloads/libpayload/include/arm64/arch/asm.h
new file mode 100644
index 0000000000..de44482793
--- /dev/null
+++ b/payloads/libpayload/include/arm64/arch/asm.h
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2013 Google Inc.
+ *
+ */
+
+#ifndef __ARM64_ASM_H
+#define __ARM64_ASM_H
+
+#  define ARM64(x...)	x
+#  define W(instr)	instr
+
+#define ALIGN .align 2
+
+#define ENDPROC(name) \
+	.type name, %function; \
+	END(name)
+
+#define ENTRY(name) \
+	.section .text.name, "ax", %progbits; \
+	.global name; \
+	ALIGN; \
+	name:
+
+#define END(name) \
+	.size name, .-name
+
+#endif	/* __ARM64_ASM_H */