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>

payloads/libpayload/configs/config.arm64-generic

@@ -0,0 +1,62 @@
+#
+# Automatically generated make config: don't edit
+# libpayload version: 0.2.0
+# Wed Dec 31 11:29:14 2014
+#
+
+#
+# Generic Options
+#
+# CONFIG_LP_EXPERIMENTAL is not set
+# CONFIG_LP_OBSOLETE is not set
+# CONFIG_LP_DEVELOPER is not set
+CONFIG_LP_CHROMEOS=y
+
+#
+# Architecture Options
+#
+# CONFIG_LP_ARCH_ARM is not set
+# CONFIG_LP_ARCH_X86 is not set
+CONFIG_LP_ARCH_ARM64=y
+# CONFIG_LP_MEMMAP_RAM_ONLY is not set
+
+#
+# Standard Libraries
+#
+CONFIG_LP_LIBC=y
+# CONFIG_LP_CURSES is not set
+CONFIG_LP_CBFS=y
+CONFIG_LP_LZMA=y
+
+#
+# Console Options
+#
+CONFIG_LP_SKIP_CONSOLE_INIT=y
+CONFIG_LP_CBMEM_CONSOLE=y
+# CONFIG_LP_SERIAL_CONSOLE is not set
+CONFIG_LP_VIDEO_CONSOLE=y
+CONFIG_LP_COREBOOT_VIDEO_CONSOLE=y
+# CONFIG_LP_PC_KEYBOARD is not set
+
+#
+# Drivers
+#
+# CONFIG_LP_RTC_PORT_EXTENDED_VIA is not set
+# CONFIG_LP_STORAGE is not set
+CONFIG_LP_TIMER_NONE=y
+# CONFIG_LP_TIMER_MCT is not set
+# CONFIG_LP_TIMER_TEGRA_1US is not set
+# CONFIG_LP_TIMER_IPQ806X is not set
+CONFIG_LP_USB=y
+# CONFIG_LP_USB_OHCI is not set
+CONFIG_LP_USB_EHCI=y
+CONFIG_LP_USB_XHCI=y
+CONFIG_LP_USB_HID=y
+CONFIG_LP_USB_HUB=y
+CONFIG_LP_USB_MSC=y
+CONFIG_LP_USB_GEN_HUB=y
+# CONFIG_LP_USB_PCI is not set
+# CONFIG_LP_BIG_ENDIAN is not set
+CONFIG_LP_LITTLE_ENDIAN=y
+# CONFIG_LP_IO_ADDRESS_SPACE is not set
+CONFIG_LP_ARCH_SPECIFIC_OPTIONS=y

payloads/libpayload/configs/defconfig

@@ -16,6 +16,7 @@
 # Architecture Options
 #
 # CONFIG_LP_ARCH_ARM is not set
+# CONFIG_LP_ARCH_ARM64 is not set
 CONFIG_LP_ARCH_X86=y
 # CONFIG_LP_MEMMAP_RAM_ONLY is not set
 # CONFIG_LP_MULTIBOOT is not set

payloads/libpayload/configs/defconfig-arm

@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # libpayload version: 0.2.0
-# Wed Dec 31 11:37:12 2014
+# Wed Dec 31 11:39:10 2014
 #
 
 #
@@ -17,6 +17,7 @@
 #
 CONFIG_LP_ARCH_ARM=y
 # CONFIG_LP_ARCH_X86 is not set
+# CONFIG_LP_ARCH_ARM64 is not set
 # CONFIG_LP_MEMMAP_RAM_ONLY is not set
 
 #