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Date: Thu, 24 Jan 2013 16:20:16 +0530
From: Vineet Gupta <Vineet.Gupta1@...opsys.com>
To: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <arnd@...db.de>, Vineet Gupta <Vineet.Gupta1@...opsys.com>,
Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH v3 02/71] ARC: Build system: Makefiles, Kconfig, Linker script
Arnd in his review pointed out that arch Kconfig organisation has several
deficiencies:
* Build time entries for things which can be runtime extracted from DT
(e.g. SDRAM size, core clk frequency..)
* Not multi-platform-image-build friendly (choice .. endchoice constructs)
* cpu variants support (750/770) is exclusive.
The first 2 have been fixed in subsequent patches.
Due to the nature of the 750 and 770, it is not possible to build for
both together, w/o special runtime glue code which would hurt
performance.
Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Sam Ravnborg <sam@...nborg.org>
---
arch/arc/Kbuild | 2 +
arch/arc/Kconfig | 328 ++++++++++++++++++++++++++++++++++++++++
arch/arc/Kconfig.debug | 34 ++++
arch/arc/Makefile | 115 ++++++++++++++
arch/arc/boot/Makefile | 26 +++
arch/arc/include/asm/Kbuild | 1 +
arch/arc/kernel/Makefile | 16 ++
arch/arc/kernel/arcksyms.c | 56 +++++++
arch/arc/kernel/asm-offsets.c | 46 ++++++
arch/arc/kernel/vmlinux.lds.S | 116 ++++++++++++++
arch/arc/lib/Makefile | 9 +
arch/arc/mm/Makefile | 10 ++
arch/arc/plat-arcfpga/Kconfig | 33 ++++
arch/arc/plat-arcfpga/Makefile | 9 +
14 files changed, 801 insertions(+), 0 deletions(-)
create mode 100644 arch/arc/Kbuild
create mode 100644 arch/arc/Kconfig
create mode 100644 arch/arc/Kconfig.debug
create mode 100644 arch/arc/Makefile
create mode 100644 arch/arc/boot/Makefile
create mode 100644 arch/arc/kernel/Makefile
create mode 100644 arch/arc/kernel/arcksyms.c
create mode 100644 arch/arc/kernel/asm-offsets.c
create mode 100644 arch/arc/kernel/vmlinux.lds.S
create mode 100644 arch/arc/lib/Makefile
create mode 100644 arch/arc/mm/Makefile
create mode 100644 arch/arc/plat-arcfpga/Kconfig
create mode 100644 arch/arc/plat-arcfpga/Makefile
diff --git a/arch/arc/Kbuild b/arch/arc/Kbuild
new file mode 100644
index 0000000..082d329
--- /dev/null
+++ b/arch/arc/Kbuild
@@ -0,0 +1,2 @@
+obj-y += kernel/
+obj-y += mm/
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
new file mode 100644
index 0000000..b0b09ae
--- /dev/null
+++ b/arch/arc/Kconfig
@@ -0,0 +1,328 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+config ARC
+ def_bool y
+ select ARCH_NO_VIRT_TO_BUS
+ # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
+ select DEVTMPFS if !INITRAMFS_SOURCE=""
+ select GENERIC_ATOMIC64
+ select GENERIC_CLOCKEVENTS
+ select GENERIC_FIND_FIRST_BIT
+ # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
+ select GENERIC_IRQ_SHOW
+ select GENERIC_PENDING_IRQ if SMP
+ select GENERIC_SMP_IDLE_THREAD
+ select HAVE_GENERIC_HARDIRQS
+ select MODULES_USE_ELF_RELA
+
+config SCHED_OMIT_FRAME_POINTER
+ def_bool y
+
+config GENERIC_CSUM
+ def_bool y
+
+config RWSEM_GENERIC_SPINLOCK
+ def_bool y
+
+config ARCH_FLATMEM_ENABLE
+ def_bool y
+
+config MMU
+ def_bool y
+
+config NO_IOPORT
+ def_bool y
+
+config GENERIC_CALIBRATE_DELAY
+ def_bool y
+
+config GENERIC_HWEIGHT
+ def_bool y
+
+config BINFMT_ELF
+ def_bool y
+
+config HAVE_LATENCYTOP_SUPPORT
+ def_bool y
+
+config NO_DMA
+ def_bool n
+
+source "init/Kconfig"
+source "kernel/Kconfig.freezer"
+
+menu "ARC Architecture Configuration"
+
+choice
+ prompt "ARC Platform"
+ default ARC_PLAT_FPGA_LEGACY
+
+config ARC_PLAT_FPGA_LEGACY
+ bool "\"Legacy\" ARC FPGA dev platform"
+ help
+ Support for ARC development platforms, provided by Synopsys.
+ These are based on FPGA or ISS. e.g.
+ - ARCAngel4
+ - ML509
+ - MetaWare ISS
+
+#New platform adds here
+endchoice
+
+menu "ARC CPU Configuration"
+
+choice
+ prompt "ARC Core"
+ default ARC_CPU_770
+
+config ARC_CPU_750D
+ bool "ARC750D"
+ help
+ Support for ARC750 core
+
+config ARC_CPU_770
+ bool "ARC770"
+ select ARC_CPU_REL_4_10
+ help
+ Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
+ This core has a bunch of cool new features:
+ -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
+ Shared Address Spaces (for sharing TLB entires in MMU)
+ -Caches: New Prog Model, Region Flush
+ -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
+
+endchoice
+
+config CPU_BIG_ENDIAN
+ bool "Enable Big Endian Mode"
+ default n
+ help
+ Build kernel for Big Endian Mode of ARC CPU
+
+menuconfig ARC_CACHE
+ bool "Enable Cache Support"
+ default y
+
+if ARC_CACHE
+
+config ARC_CACHE_LINE_SHIFT
+ int "Cache Line Length (as power of 2)"
+ range 5 7
+ default "6"
+ help
+ Starting with ARC700 4.9, Cache line length is configurable,
+ This option specifies "N", with Line-len = 2 power N
+ So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
+ Linux only supports same line lengths for I and D caches.
+
+config ARC_HAS_ICACHE
+ bool "Use Instruction Cache"
+ default y
+
+config ARC_HAS_DCACHE
+ bool "Use Data Cache"
+ default y
+
+config ARC_CACHE_PAGES
+ bool "Per Page Cache Control"
+ default y
+ depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
+ help
+ This can be used to over-ride the global I/D Cache Enable on a
+ per-page basis (but only for pages accessed via MMU such as
+ Kernel Virtual address or User Virtual Address)
+ TLB entries have a per-page Cache Enable Bit.
+ Note that Global I/D ENABLE + Per Page DISABLE works but corollary
+ Global DISABLE + Per Page ENABLE won't work
+
+endif #ARC_CACHE
+
+config ARC_HAS_HW_MPY
+ bool "Use Hardware Multiplier (Normal or Faster XMAC)"
+ default y
+ help
+ Influences how gcc generates code for MPY operations.
+ If enabled, MPYxx insns are generated, provided by Standard/XMAC
+ Multipler. Otherwise software multipy lib is used
+
+choice
+ prompt "ARC700 MMU Version"
+ default ARC_MMU_V3 if ARC_CPU_770
+ default ARC_MMU_V2 if ARC_CPU_750D
+
+config ARC_MMU_V1
+ bool "MMU v1"
+ help
+ Orig ARC700 MMU
+
+config ARC_MMU_V2
+ bool "MMU v2"
+ help
+ Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
+ when 2 D-TLB and 1 I-TLB entries index into same 2way set.
+
+config ARC_MMU_V3
+ bool "MMU v3"
+ depends on ARC_CPU_770
+ help
+ Introduced with ARC700 4.10: New Features
+ Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
+ Shared Address Spaces (SASID)
+
+endchoice
+
+
+choice
+ prompt "MMU Page Size"
+ default ARC_PAGE_SIZE_8K
+
+config ARC_PAGE_SIZE_8K
+ bool "8KB"
+ help
+ Choose between 8k vs 16k
+
+config ARC_PAGE_SIZE_16K
+ bool "16KB"
+ depends on ARC_MMU_V3
+
+config ARC_PAGE_SIZE_4K
+ bool "4KB"
+ depends on ARC_MMU_V3
+
+endchoice
+
+config ARC_FPU_SAVE_RESTORE
+ bool "Enable FPU state persistence across context switch"
+ default n
+ help
+ Double Precision Floating Point unit had dedictaed regs which
+ need to be saved/restored across context-switch.
+ Note that ARC FPU is overly simplistic, unlike say x86, which has
+ hardware pieces to allow software to conditionally save/restore,
+ based on actual usage of FPU by a task. Thus our implemn does
+ this for all tasks in system.
+
+menuconfig ARC_CPU_REL_4_10
+ bool "Enable support for Rel 4.10 features"
+ default n
+ help
+ -ARC770 (and dependent features) enabled
+ -ARC750 also shares some of the new features with 770
+
+config ARC_HAS_LLSC
+ bool "Insn: LLOCK/SCOND (efficient atomic ops)"
+ default y
+ depends on ARC_CPU_770
+ # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
+ depends on !SMP || ARC_HAS_COH_LLSC
+
+config ARC_HAS_SWAPE
+ bool "Insn: SWAPE (endian-swap)"
+ default y
+ depends on ARC_CPU_REL_4_10
+
+config ARC_HAS_RTSC
+ bool "Insn: RTSC (64-bit r/o cycle counter)"
+ default y
+ depends on ARC_CPU_REL_4_10
+
+endmenu # "ARC CPU Configuration"
+
+menu "Platform Board Configuration"
+
+source "arch/arc/plat-arcfpga/Kconfig"
+
+#New platform adds here
+
+config ARC_PLAT_CLK
+ int "Clk speed in Hz"
+ default "80000000"
+
+config LINUX_LINK_BASE
+ hex "Linux Link Address"
+ default "0x80000000"
+ help
+ ARC700 divides the 32 bit phy address space into two equal halves
+ -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
+ -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
+ Typically Linux kernel is linked at the start of untransalted addr,
+ hence the default value of 0x8zs.
+ However some customers have peripherals mapped at this addr, so
+ Linux needs to be scooted a bit.
+ If you don't know what the above means, leave this setting alone.
+
+config ARC_PLAT_SDRAM_SIZE
+ hex "SD RAM Size"
+ default "0x10000000"
+ help
+ Implies the amount of SDRAM/DRAM Linux is going to claim/own.
+ The actual memory itself could be larger than this number. But for
+ all software purposes, this is the amt of memory.
+
+endmenu # "Platform Board Configuration"
+
+config ARC_STACK_NONEXEC
+ bool "Make stack non-executable"
+ default n
+ help
+ To disable the execute permissions of stack/heap of processes
+ which are enabled by default.
+
+config HZ
+ int "Timer Frequency"
+ default 100
+
+menuconfig ARC_DBG
+ bool "ARC debugging"
+ default y
+
+config ARC_DBG_TLB_PARANOIA
+ bool "Paranoia Checks in Low Level TLB Handlers"
+ depends on ARC_DBG
+ default n
+
+config ARC_DBG_TLB_MISS_COUNT
+ bool "Profile TLB Misses"
+ default n
+ select DEBUG_FS
+ depends on ARC_DBG
+ help
+ Counts number of I and D TLB Misses and exports them via Debugfs
+ The counters can be cleared via Debugfs as well
+
+config CMDLINE
+ string "Kernel command line to built-in"
+ default "print-fatal-signals=1"
+ help
+ The default command line which will be appended to the optional
+ u-boot provided command line (see below)
+
+config CMDLINE_UBOOT
+ bool "Support U-boot kernel command line passing"
+ default n
+ help
+ If you are using U-boot (www.denx.de) and wish to pass the kernel
+ command line from the U-boot environment to the Linux kernel then
+ switch this option on.
+ ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
+ to it. kernel startup code will copy the string into cmdline buffer
+ and also append CONFIG_CMDLINE.
+
+source "kernel/Kconfig.preempt"
+
+endmenu # "ARC Architecture Configuration"
+
+source "mm/Kconfig"
+source "net/Kconfig"
+source "drivers/Kconfig"
+source "fs/Kconfig"
+source "arch/arc/Kconfig.debug"
+source "security/Kconfig"
+source "crypto/Kconfig"
+source "lib/Kconfig"
diff --git a/arch/arc/Kconfig.debug b/arch/arc/Kconfig.debug
new file mode 100644
index 0000000..962c609
--- /dev/null
+++ b/arch/arc/Kconfig.debug
@@ -0,0 +1,34 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config EARLY_PRINTK
+ bool "Early printk" if EMBEDDED
+ default y
+ help
+ Write kernel log output directly into the VGA buffer or to a serial
+ port.
+
+ This is useful for kernel debugging when your machine crashes very
+ early before the console code is initialized. For normal operation
+ it is not recommended because it looks ugly and doesn't cooperate
+ with klogd/syslogd or the X server. You should normally N here,
+ unless you want to debug such a crash.
+
+config DEBUG_STACKOVERFLOW
+ bool "Check for stack overflows"
+ depends on DEBUG_KERNEL
+ help
+ This option will cause messages to be printed if free stack space
+ drops below a certain limit.
+
+config 16KSTACKS
+ bool "Use 16Kb for kernel stacks instead of 8Kb"
+ help
+ If you say Y here the kernel will use a 16Kb stacksize for the
+ kernel stack attached to each process/thread. The default is 8K.
+ This increases the resident kernel footprint and will cause less
+ threads to run on the system and also increase the pressure
+ on the VM subsystem for higher order allocations.
+
+endmenu
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
new file mode 100644
index 0000000..4d52a3b
--- /dev/null
+++ b/arch/arc/Makefile
@@ -0,0 +1,115 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+UTS_MACHINE := arc
+
+KBUILD_DEFCONFIG := fpga_defconfig
+
+# For ARC FPGA Platforms
+platform-$(CONFIG_ARC_PLAT_FPGA_LEGACY) := arcfpga
+#New platform adds here
+
+PLATFORM := $(platform-y)
+export PLATFORM
+
+cflags-y += -Iarch/arc/plat-$(PLATFORM)/include
+cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
+
+atleast_gcc44 := $(call cc-ifversion, -gt, 0402, y)
+cflags-$(atleast_gcc44) += -fsection-anchors
+
+cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
+cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
+cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
+cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
+
+ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
+# Generic build system uses -O2, we want -O3
+cflags-y += -O3
+endif
+
+# small data is default for elf32 tool-chain. If not usable, disable it
+# This also allows repurposing GP as scratch reg to gcc reg allocator
+disable_small_data := y
+cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
+
+cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
+ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
+
+# STAR 9000518362:
+# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
+# --build-id w/o "-marclinux".
+# Default arc-elf32-ld is OK
+ldflags-y += -marclinux
+
+ARC_LIBGCC := -mA7
+cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16
+
+ifndef CONFIG_ARC_HAS_HW_MPY
+ cflags-y += -mno-mpy
+
+# newlib for ARC700 assumes MPY to be always present, which is generally true
+# However, if someone really doesn't want MPY, we need to use the 600 ver
+# which coupled with -mno-mpy will use mpy emulation
+# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
+# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted
+
+ ARC_LIBGCC := -marc600
+ ifneq ($(atleast_gcc44),y)
+ cflags-y += -multcost=30
+ endif
+endif
+
+LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)
+
+# Modules with short calls might break for calls into builtin-kernel
+KBUILD_CFLAGS_MODULE += -mlong-calls
+
+# Finally dump eveything into kernel build system
+KBUILD_CFLAGS += $(cflags-y)
+KBUILD_AFLAGS += $(KBUILD_CFLAGS)
+LDFLAGS += $(ldflags-y)
+
+# Needed for Linker script preprocessing
+KBUILD_CPPFLAGS += -Iarch/arc/plat-$(PLATFORM)/include
+
+head-y := arch/arc/kernel/head.o
+
+# See arch/arc/Kbuild for content of core part of the kernel
+core-y += arch/arc/
+
+# w/o this ifneq, make ARCH=arc clean was crapping out
+ifneq ($(platform-y),)
+core-y += arch/arc/plat-$(PLATFORM)/
+endif
+
+libs-y += arch/arc/lib/ $(LIBGCC)
+
+#default target for make without any arguements.
+KBUILD_IMAGE := bootpImage
+
+all: $(KBUILD_IMAGE)
+boot := arch/arc/boot
+
+bootpImage: vmlinux
+
+uImage: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+
+archclean:
+ $(Q)$(MAKE) $(clean)=$(boot)
+
+# Hacks to enable final link due to absence of link-time branch relexation
+# and gcc choosing optimal(shorter) branches at -O3
+#
+# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
+# However lib/decompress_inflate.o (.init.text) calls
+# zlib_inflate_workspacesize (.text) causing relocation errors.
+# Thus forcing all exten calls in this file to be long calls
+export CFLAGS_decompress_inflate.o = -mmedium-calls
+export CFLAGS_initramfs.o = -mmedium-calls
diff --git a/arch/arc/boot/Makefile b/arch/arc/boot/Makefile
new file mode 100644
index 0000000..7d514c2
--- /dev/null
+++ b/arch/arc/boot/Makefile
@@ -0,0 +1,26 @@
+targets := vmlinux.bin vmlinux.bin.gz uImage
+
+# uImage build relies on mkimage being availble on your host for ARC target
+# You will need to build u-boot for ARC, rename mkimage to arc-elf32-mkimage
+# and make sure it's reacable from your PATH
+MKIMAGE := $(srctree)/scripts/mkuboot.sh
+
+OBJCOPYFLAGS= -O binary -R .note -R .note.gnu.build-id -R .comment -S
+
+LINUX_START_TEXT = $$(readelf -h vmlinux | \
+ grep "Entry point address" | grep -o 0x.*)
+
+UIMAGE_LOADADDR = $(CONFIG_LINUX_LINK_BASE)
+UIMAGE_ENTRYADDR = $(LINUX_START_TEXT)
+UIMAGE_COMPRESSION = gzip
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+ $(call if_changed,gzip)
+
+$(obj)/uImage: $(obj)/vmlinux.bin.gz FORCE
+ $(call if_changed,uimage)
+
+PHONY += FORCE
diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild
index a90a3c6..105ec11 100644
--- a/arch/arc/include/asm/Kbuild
+++ b/arch/arc/include/asm/Kbuild
@@ -33,6 +33,7 @@ generic-y += mman.h
generic-y += msgbuf.h
generic-y += param.h
generic-y += parport.h
+generic-y += pci.h
generic-y += percpu.h
generic-y += poll.h
generic-y += posix_types.h
diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile
new file mode 100644
index 0000000..6d83431
--- /dev/null
+++ b/arch/arc/kernel/Makefile
@@ -0,0 +1,16 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o entry.o process.o
+obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o clk.o
+
+obj-$(CONFIG_ARC_FPU_SAVE_RESTORE) += fpu.o
+CFLAGS_fpu.o += -mdpfp
+
+obj-y += ctx_sw_asm.o
+
+extra-y := vmlinux.lds head.o
diff --git a/arch/arc/kernel/arcksyms.c b/arch/arc/kernel/arcksyms.c
new file mode 100644
index 0000000..4d9e777
--- /dev/null
+++ b/arch/arc/kernel/arcksyms.c
@@ -0,0 +1,56 @@
+/*
+ * arcksyms.c - Exporting symbols not exportable from their own sources
+ *
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+
+/* libgcc functions, not part of kernel sources */
+extern void __ashldi3(void);
+extern void __ashrdi3(void);
+extern void __divsi3(void);
+extern void __divsf3(void);
+extern void __lshrdi3(void);
+extern void __modsi3(void);
+extern void __muldi3(void);
+extern void __ucmpdi2(void);
+extern void __udivsi3(void);
+extern void __umodsi3(void);
+extern void __cmpdi2(void);
+extern void __fixunsdfsi(void);
+extern void __muldf3(void);
+extern void __divdf3(void);
+extern void __floatunsidf(void);
+extern void __floatunsisf(void);
+
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__divsi3);
+EXPORT_SYMBOL(__divsf3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__modsi3);
+EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__ucmpdi2);
+EXPORT_SYMBOL(__udivsi3);
+EXPORT_SYMBOL(__umodsi3);
+EXPORT_SYMBOL(__cmpdi2);
+EXPORT_SYMBOL(__fixunsdfsi);
+EXPORT_SYMBOL(__muldf3);
+EXPORT_SYMBOL(__divdf3);
+EXPORT_SYMBOL(__floatunsidf);
+EXPORT_SYMBOL(__floatunsisf);
+
+/* ARC optimised assembler routines */
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memcmp);
+EXPORT_SYMBOL(strchr);
+EXPORT_SYMBOL(strcpy);
+EXPORT_SYMBOL(strcmp);
+EXPORT_SYMBOL(strlen);
diff --git a/arch/arc/kernel/asm-offsets.c b/arch/arc/kernel/asm-offsets.c
new file mode 100644
index 0000000..7f3f611
--- /dev/null
+++ b/arch/arc/kernel/asm-offsets.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <asm/hardirq.h>
+#include <linux/thread_info.h>
+#include <asm/page.h>
+#include <linux/kbuild.h>
+
+int main(void)
+{
+ DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
+ DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
+
+ BLANK();
+
+ DEFINE(THREAD_KSP, offsetof(struct thread_struct, ksp));
+ DEFINE(THREAD_CALLEE_REG, offsetof(struct thread_struct, callee_reg));
+ DEFINE(THREAD_FAULT_ADDR,
+ offsetof(struct thread_struct, fault_address));
+
+ BLANK();
+
+ DEFINE(THREAD_INFO_FLAGS, offsetof(struct thread_info, flags));
+ DEFINE(THREAD_INFO_PREEMPT_COUNT,
+ offsetof(struct thread_info, preempt_count));
+
+ BLANK();
+
+ DEFINE(TASK_ACT_MM, offsetof(struct task_struct, active_mm));
+ DEFINE(TASK_TGID, offsetof(struct task_struct, tgid));
+
+ DEFINE(MM_CTXT, offsetof(struct mm_struct, context));
+ DEFINE(MM_PGD, offsetof(struct mm_struct, pgd));
+
+ DEFINE(MM_CTXT_ASID, offsetof(mm_context_t, asid));
+
+ return 0;
+}
diff --git a/arch/arc/kernel/vmlinux.lds.S b/arch/arc/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..8c72bc3
--- /dev/null
+++ b/arch/arc/kernel/vmlinux.lds.S
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/cache.h>
+#include <asm/page.h>
+#include <asm/thread_info.h>
+#include <plat/memmap.h>
+
+OUTPUT_ARCH(arc)
+ENTRY(_stext)
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+jiffies = jiffies_64 + 4;
+#else
+jiffies = jiffies_64;
+#endif
+
+SECTIONS
+{
+ . = CONFIG_LINUX_LINK_BASE;
+
+ _int_vec_base_lds = .;
+ .vector : {
+ *(.vector)
+ . = ALIGN(PAGE_SIZE);
+ }
+
+ /*
+ * The reason for having a seperate subsection .init.ramfs is to
+ * prevent objump from including it in kernel dumps
+ *
+ * Reason for having .init.ramfs above .init is to make sure that the
+ * binary blob is tucked away to one side, reducing the displacement
+ * between .init.text and .text, avoiding any possible relocation
+ * errors because of calls from .init.text to .text
+ * Yes such calls do exist. e.g.
+ * decompress_inflate.c:gunzip( ) -> zlib_inflate_workspace( )
+ */
+
+ __init_begin = .;
+
+ .init.ramfs : { INIT_RAM_FS }
+
+ . = ALIGN(PAGE_SIZE);
+ _stext = .;
+
+ HEAD_TEXT_SECTION
+ INIT_TEXT_SECTION(L1_CACHE_BYTES)
+
+ /* INIT_DATA_SECTION open-coded: special INIT_RAM_FS handling */
+ .init.data : {
+ INIT_DATA
+ INIT_SETUP(L1_CACHE_BYTES)
+ INIT_CALLS
+ CON_INITCALL
+ SECURITY_INITCALL
+ }
+
+ PERCPU_SECTION(L1_CACHE_BYTES)
+
+ /*
+ * .exit.text is discard at runtime, not link time, to deal with
+ * references from .debug_frame
+ * It will be init freed, being inside [__init_start : __init_end]
+ */
+ .exit.text : { EXIT_TEXT }
+ .exit.data : { EXIT_DATA }
+
+ . = ALIGN(PAGE_SIZE);
+ __init_end = .;
+
+ .text : {
+ _text = .;
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ KPROBES_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ }
+ EXCEPTION_TABLE(L1_CACHE_BYTES)
+ _etext = .;
+
+ _sdata = .;
+ RO_DATA_SECTION(PAGE_SIZE)
+
+ /*
+ * 1. this is .data essentially
+ * 2. THREAD_SIZE for init.task, must be kernel-stk sz aligned
+ */
+ RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
+
+ _edata = .;
+
+ BSS_SECTION(0, 0, 0)
+
+ NOTES
+
+ . = ALIGN(PAGE_SIZE);
+ _end = . ;
+
+ STABS_DEBUG
+ DWARF_DEBUG
+ DISCARDS
+
+ .arcextmap 0 : {
+ *(.gnu.linkonce.arcextmap.*)
+ *(.arcextmap.*)
+ }
+}
diff --git a/arch/arc/lib/Makefile b/arch/arc/lib/Makefile
new file mode 100644
index 0000000..db46e20
--- /dev/null
+++ b/arch/arc/lib/Makefile
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+lib-y := strchr-700.o strcmp.o strcpy-700.o strlen.o
+lib-y += memcmp.o memcpy-700.o memset.o
diff --git a/arch/arc/mm/Makefile b/arch/arc/mm/Makefile
new file mode 100644
index 0000000..168dc14
--- /dev/null
+++ b/arch/arc/mm/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+obj-y := extable.o ioremap.o dma.o fault.o init.o
+obj-y += tlb.o tlbex.o cache_arc700.o
diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig
new file mode 100644
index 0000000..7af3a4e
--- /dev/null
+++ b/arch/arc/plat-arcfpga/Kconfig
@@ -0,0 +1,33 @@
+#
+# Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+if ARC_PLAT_FPGA_LEGACY
+
+choice
+ prompt "FPGA Board"
+
+config ARC_BOARD_ANGEL4
+ bool "ARC Angel4"
+ help
+ ARC Angel4 FPGA Ref Platform (Xilinx Virtex Based)
+
+config ARC_BOARD_ML509
+ bool "ML509"
+ help
+ ARC ML509 FPGA Ref Platform (Xilinx Virtex-5 Based)
+
+endchoice
+
+config ARC_SERIAL_BAUD
+ int "UART Baud rate"
+ default "115200"
+ depends on SERIAL_ARC || SERIAL_ARC_CONSOLE
+ help
+ Baud rate for the ARC UART
+
+endif
diff --git a/arch/arc/plat-arcfpga/Makefile b/arch/arc/plat-arcfpga/Makefile
new file mode 100644
index 0000000..385eb9d
--- /dev/null
+++ b/arch/arc/plat-arcfpga/Makefile
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2011-2012 Synopsys, Inc. (www.synopsys.com)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+
+obj-y := platform.o irq.o
--
1.7.4.1
--
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