[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 1

The attached patches provides part 1 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile
new file mode 100644
index 00000000000..4fa27453b1f
--- /dev/null
+++ b/arch/xtensa/Makefile
@@ -0,0 +1,102 @@
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2001 - 2005  Tensilica Inc.
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies. Remember to do have actions
+# for "archclean" and "archdep" for cleaning up and making dependencies for
+# this architecture
+
+# Core configuration.
+# (Use CPU=<xtensa_config> to use another default compiler.)
+
+cpu-$(CONFIG_XTENSA_CPU_LINUX_BE)       := linux_be
+cpu-$(CONFIG_XTENSA_CPU_LINUX_CUSTOM)   := linux_custom
+
+CPU = $(cpu-y)
+export CPU
+
+# Platform configuration
+
+platform-y                                      := common
+platform-$(CONFIG_XTENSA_PLATFORM_XT2000)       := xt2000
+platform-$(CONFIG_XTENSA_PLATFORM_ISS)          := iss
+
+PLATFORM = $(platform-y)
+export PLATFORM
+
+#LDFLAGS_vmlinux                := -T$(word 1,$(LINKSCRIPT))
+AFLAGS_vmlinux.lds.o    := -Uxtensa
+CPPFLAGS                += -Iarch/xtensa -Iinclude/asm  -mlongcalls  -g
+AFLAGS                  += -Iarch/xtensa -Iinclude/asm
+CPP                     = $(CC) -E $(CFLAGS)
+
+cflags-y        += -Iarch/xtensa -pipe -mlongcalls
+
+
+KBUILD_DEFCONFIG := common_defconfig
+
+# ramdisk/initrd support
+# You need a compressed ramdisk image, named ramdisk.gz in
+# arch/xtensa/boot/ramdisk
+
+core-$(CONFIG_EMBEDDED_RAMDISK) += arch/xtensa/boot/ramdisk/
+
+# Test for cross compiling
+
+ifneq ($(CPU),)
+  COMPILE_ARCH = $(shell uname -m)
+
+  ifneq ($(COMPILE_ARCH), xtensa)
+    ifndef CROSS_COMPILE
+      CROSS_COMPILE = xtensa_$(CPU)-
+    endif
+  endif
+endif
+
+#
+
+LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+head-y          := arch/xtensa/kernel/head.o
+core-y          += arch/xtensa/kernel/ \
+                   arch/xtensa/mm/ arch/xtensa/platform-$(PLATFORM)/
+libs-y          += arch/xtensa/lib/ $(LIBGCC)
+
+boot    := arch/xtensa/boot
+
+arch/xtensa/kernel/asm-offsets.s: \
+        arch/xtensa/kernel/asm-offsets.c \
+        include/asm-xtensa/.platform
+
+include/asm-xtensa/offsets.h: arch/xtensa/kernel/asm-offsets.s
+        $(call filechk,gen-asm-offsets)
+
+prepare: include/asm-xtensa/.platform include/asm-xtensa/offsets.h
+
+# Update machine cpu and platform symlinks if something which affects
+# them changed.
+
+include/asm-xtensa/.platform: $(wildcard include/config/arch/*.h)
+        @echo '  Setting up cpu ($(CPU)) and platform ($(PLATFORM)) symlinks'
+        $(Q)rm -f include/asm-xtensa/platform
+        $(Q)rm -f include/asm-xtensa/xtensa/config
+        $(Q)(cd include/asm-xtensa/; ln -sf platform-$(PLATFORM) platform)
+        $(Q)(cd include/asm-xtensa/xtensa; ln -sf config-$(CPU) config)
+
+all: zImage
+
+bzImage : zImage
+
+zImage zImage.initrd: vmlinux
+        $(Q)$(MAKE) $(build)=$(boot) $@
+
+CLEAN_FILES     += arch/xtensa/vmlinux.lds include/asm-xtensa/offset.h
+
+define archhelp
+  @echo '* zImage      - Compressed kernel image (arch/xtensa/boot/images/zImage.*)'
+endef
+