[PATCH] avr32 architecture

This adds support for the Atmel AVR32 architecture as well as the AT32AP7000
CPU and the AT32STK1000 development board.

AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for
cost-sensitive embedded applications, with particular emphasis on low power
consumption and high code density.  The AVR32 architecture is not binary
compatible with earlier 8-bit AVR architectures.

The AVR32 architecture, including the instruction set, is described by the
AVR32 Architecture Manual, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf

The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture.  It
features a 7-stage pipeline, 16KB instruction and data caches and a full
Memory Management Unit.  It also comes with a large set of integrated
peripherals, many of which are shared with the AT91 ARM-based controllers from
Atmel.

Full data sheet is available from

http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf

while the CPU core implementation including caches and MMU is documented by
the AVR32 AP Technical Reference, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf

Information about the AT32STK1000 development board can be found at

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918

including a BSP CD image with an earlier version of this patch, development
tools (binaries and source/patches) and a root filesystem image suitable for
booting from SD card.

Alternatively, there's a preliminary "getting started" guide available at
http://avr32linux.org/twiki/bin/view/Main/GettingStarted

 which provides links
to the sources and patches you will need in order to set up a cross-compiling
environment for avr32-linux.

This patch, as well as the other patches included with the BSP and the
toolchain patches, is actively supported by Atmel Corporation.

[dmccr@us.ibm.com: Fix more pxx_page macro locations]
[bunk@stusta.de: fix `make defconfig']
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dave McCracken <dmccr@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

MAINTAINERS

@@ -443,6 +443,23 @@ W:	http://people.redhat.com/sgrubb/audit/
 T:	git kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6.git
 S:	Maintained
 
+AVR32 ARCHITECTURE
+P:	Atmel AVR32 Support Team
+M:	avr32@atmel.com
+P:	Haavard Skinnemoen
+M:	hskinnemoen@atmel.com
+W:	http://www.atmel.com/products/AVR32/
+W:	http://avr32linux.org/
+W:	http://avrfreaks.net/
+S:	Supported
+
+AVR32/AT32AP MACHINE SUPPORT
+P:	Atmel AVR32 Support Team
+M:	avr32@atmel.com
+P:	Haavard Skinnemoen
+M:	hskinnemoen@atmel.com
+S:	Supported
+
 AX.25 NETWORK LAYER
 P:	Ralf Baechle
 M:	ralf@linux-mips.org

arch/avr32/Kconfig

+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+
+mainmenu "Linux Kernel Configuration"
+
+config AVR32
+	bool
+	default y
+	# With EMBEDDED=n, we get lots of stuff automatically selected
+	# that we usually don't need on AVR32.
+	select EMBEDDED
+	help
+	  AVR32 is a high-performance 32-bit RISC microprocessor core,
+	  designed for cost-sensitive embedded applications, with particular
+	  emphasis on low power consumption and high code density.
+
+	  There is an AVR32 Linux project with a web page at
+	  http://avr32linux.org/.
+
+config UID16
+	bool
+
+config GENERIC_HARDIRQS
+	bool
+	default y
+
+config HARDIRQS_SW_RESEND
+	bool
+	default y
+
+config GENERIC_IRQ_PROBE
+	bool
+	default y
+
+config RWSEM_GENERIC_SPINLOCK
+	bool
+	default y
+
+config GENERIC_TIME
+	bool
+	default y
+
+config RWSEM_XCHGADD_ALGORITHM
+	bool
+
+config GENERIC_BUST_SPINLOCK
+	bool
+
+config GENERIC_HWEIGHT
+	bool
+	default y
+
+config GENERIC_CALIBRATE_DELAY
+	bool
+	default y
+
+source "init/Kconfig"
+
+menu "System Type and features"
+
+config SUBARCH_AVR32B
+	bool
+config MMU
+	bool
+config PERFORMANCE_COUNTERS
+	bool
+
+config PLATFORM_AT32AP
+	bool
+	select SUBARCH_AVR32B
+	select MMU
+	select PERFORMANCE_COUNTERS
+
+choice
+	prompt "AVR32 CPU type"
+	default CPU_AT32AP7000
+
+config CPU_AT32AP7000
+	bool "AT32AP7000"
+	select PLATFORM_AT32AP
+endchoice
+
+#
+# CPU Daughterboards for ATSTK1000
+config BOARD_ATSTK1002
+	bool
+
+choice
+	prompt "AVR32 board type"
+	default BOARD_ATSTK1000
+
+config BOARD_ATSTK1000
+	bool "ATSTK1000 evaluation board"
+	select BOARD_ATSTK1002 if CPU_AT32AP7000
+endchoice
+
+choice
+	prompt "Boot loader type"
+	default LOADER_U_BOOT
+
+config	LOADER_U_BOOT
+	bool "U-Boot (or similar) bootloader"
+endchoice
+
+config LOAD_ADDRESS
+	hex
+	default 0x10000000 if LOADER_U_BOOT=y && CPU_AT32AP7000=y
+
+config ENTRY_ADDRESS
+	hex
+	default 0x90000000 if LOADER_U_BOOT=y && CPU_AT32AP7000=y
+
+config PHYS_OFFSET
+	hex
+	default 0x10000000 if CPU_AT32AP7000=y
+
+source "kernel/Kconfig.preempt"
+
+config HAVE_ARCH_BOOTMEM_NODE
+	bool
+	default n
+
+config ARCH_HAVE_MEMORY_PRESENT
+	bool
+	default n
+
+config NEED_NODE_MEMMAP_SIZE
+	bool
+	default n
+
+config ARCH_FLATMEM_ENABLE
+	bool
+	default y
+
+config ARCH_DISCONTIGMEM_ENABLE
+	bool
+	default n
+
+config ARCH_SPARSEMEM_ENABLE
+	bool
+	default n
+
+source "mm/Kconfig"
+
+config OWNERSHIP_TRACE
+	bool "Ownership trace support"
+	default y
+	help
+	  Say Y to generate an Ownership Trace message on every context switch,
+	  enabling Nexus-compliant debuggers to keep track of the PID of the
+	  currently executing task.
+
+# FPU emulation goes here
+
+source "kernel/Kconfig.hz"
+
+config CMDLINE
+	string "Default kernel command line"
+	default ""
+	help
+	  If you don't have a boot loader capable of passing a command line string
+	  to the kernel, you may specify one here. As a minimum, you should specify
+	  the memory size and the root device (e.g., mem=8M, root=/dev/nfs).
+
+endmenu
+
+menu "Bus options"
+
+config PCI
+	bool
+
+source "drivers/pci/Kconfig"
+
+source "drivers/pcmcia/Kconfig"
+
+endmenu
+
+menu "Executable file formats"
+source "fs/Kconfig.binfmt"
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/avr32/Kconfig.debug"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"

arch/avr32/Kconfig.debug

+menu "Kernel hacking"
+
+config TRACE_IRQFLAGS_SUPPORT
+	bool
+	default y
+
+source "lib/Kconfig.debug"
+
+config KPROBES
+	bool "Kprobes"
+	depends on DEBUG_KERNEL
+	help
+	  Kprobes allows you to trap at almost any kernel address and
+          execute a callback function.  register_kprobe() establishes
+          a probepoint and specifies the callback.  Kprobes is useful
+          for kernel debugging, non-intrusive instrumentation and testing.
+          If in doubt, say "N".
+
+endmenu

arch/avr32/Makefile

+#
+# 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) 2004-2006 Atmel Corporation.
+
+# Default target when executing plain make
+.PHONY: all
+all: uImage vmlinux.elf linux.lst
+
+KBUILD_DEFCONFIG	:= atstk1002_defconfig
+
+CFLAGS		+= -pipe -fno-builtin -mno-pic
+AFLAGS		+= -mrelax -mno-pic
+CFLAGS_MODULE	+= -mno-relax
+LDFLAGS_vmlinux	+= --relax
+
+cpuflags-$(CONFIG_CPU_AP7000)	+= -mcpu=ap7000
+
+CFLAGS		+= $(cpuflags-y)
+AFLAGS		+= $(cpuflags-y)
+
+CHECKFLAGS	+= -D__avr32__
+
+LIBGCC		:= $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
+
+head-$(CONFIG_LOADER_U_BOOT)		+= arch/avr32/boot/u-boot/head.o
+head-y					+= arch/avr32/kernel/head.o
+core-$(CONFIG_PLATFORM_AT32AP)		+= arch/avr32/mach-at32ap/
+core-$(CONFIG_BOARD_ATSTK1000)		+= arch/avr32/boards/atstk1000/
+core-$(CONFIG_LOADER_U_BOOT)		+= arch/avr32/boot/u-boot/
+core-y					+= arch/avr32/kernel/
+core-y					+= arch/avr32/mm/
+libs-y					+= arch/avr32/lib/ #$(LIBGCC)
+
+archincdir-$(CONFIG_PLATFORM_AT32AP)	:= arch-at32ap
+
+include/asm-avr32/.arch: $(wildcard include/config/platform/*.h) include/config/auto.conf
+	@echo '  SYMLINK include/asm-avr32/arch -> include/asm-avr32/$(archincdir-y)'
+ifneq ($(KBUILD_SRC),)
+	$(Q)mkdir -p include/asm-avr32
+	$(Q)ln -fsn $(srctree)/include/asm-avr32/$(archincdir-y) include/asm-avr32/arch
+else
+	$(Q)ln -fsn $(archincdir-y) include/asm-avr32/arch
+endif
+	@touch $@
+
+archprepare: include/asm-avr32/.arch
+
+BOOT_TARGETS := vmlinux.elf vmlinux.bin uImage uImage.srec
+
+.PHONY: $(BOOT_TARGETS) install
+
+boot := arch/$(ARCH)/boot/images
+
+             KBUILD_IMAGE := $(boot)/uImage
+vmlinux.elf: KBUILD_IMAGE := $(boot)/vmlinux.elf
+vmlinux.cso: KBUILD_IMAGE := $(boot)/vmlinux.cso
+uImage.srec: KBUILD_IMAGE := $(boot)/uImage.srec
+uImage:      KBUILD_IMAGE := $(boot)/uImage
+
+quiet_cmd_listing = LST     $@
+      cmd_listing = avr32-linux-objdump $(OBJDUMPFLAGS) -lS $< > $@
+quiet_cmd_disasm  = DIS     $@
+      cmd_disasm  = avr32-linux-objdump $(OBJDUMPFLAGS) -d $< > $@
+
+vmlinux.elf vmlinux.bin uImage.srec uImage vmlinux.cso: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
+
+install: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
+
+linux.s: vmlinux
+	$(call if_changed,disasm)
+
+linux.lst: vmlinux
+	$(call if_changed,listing)
+
+define archhelp
+  @echo '* vmlinux.elf		- ELF image with load address 0'
+  @echo '  vmlinux.cso		- PathFinder CSO image'
+  @echo '  uImage		- Create a bootable image for U-Boot'
+endef

arch/avr32/boards/atstk1000/Makefile

+obj-y				+= setup.o spi.o
+obj-$(CONFIG_BOARD_ATSTK1002)	+= atstk1002.o

arch/avr32/boards/atstk1000/atstk1002.c

+/*
+ * ATSTK1002 daughterboard-specific init code
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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/init.h>
+
+#include <asm/arch/board.h>
+
+struct eth_platform_data __initdata eth0_data = {
+	.valid		= 1,
+	.mii_phy_addr	= 0x10,
+	.is_rmii	= 0,
+	.hw_addr	= { 0x6a, 0x87, 0x71, 0x14, 0xcd, 0xcb },
+};
+
+extern struct lcdc_platform_data atstk1000_fb0_data;
+
+static int __init atstk1002_init(void)
+{
+	at32_add_system_devices();
+
+	at32_add_device_usart(1);	/* /dev/ttyS0 */
+	at32_add_device_usart(2);	/* /dev/ttyS1 */
+	at32_add_device_usart(3);	/* /dev/ttyS2 */
+
+	at32_add_device_eth(0, &eth0_data);
+	at32_add_device_spi(0);
+	at32_add_device_lcdc(0, &atstk1000_fb0_data);
+
+	return 0;
+}
+postcore_initcall(atstk1002_init);

arch/avr32/boards/atstk1000/setup.c

+/*
+ * ATSTK1000 board-specific setup code.
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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/bootmem.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/linkage.h>
+
+#include <asm/setup.h>
+
+#include <asm/arch/board.h>
+
+/* Initialized by bootloader-specific startup code. */
+struct tag *bootloader_tags __initdata;
+
+struct lcdc_platform_data __initdata atstk1000_fb0_data;
+
+asmlinkage void __init board_early_init(void)
+{
+	extern void sdram_init(void);
+
+#ifdef CONFIG_LOADER_STANDALONE
+	sdram_init();
+#endif
+}
+
+void __init board_setup_fbmem(unsigned long fbmem_start,
+			      unsigned long fbmem_size)
+{
+	if (!fbmem_size)
+		return;
+
+	if (!fbmem_start) {
+		void *fbmem;
+
+		fbmem = alloc_bootmem_low_pages(fbmem_size);
+		fbmem_start = __pa(fbmem);
+	} else {
+		pg_data_t *pgdat;
+
+		for_each_online_pgdat(pgdat) {
+			if (fbmem_start >= pgdat->bdata->node_boot_start
+			    && fbmem_start <= pgdat->bdata->node_low_pfn)
+				reserve_bootmem_node(pgdat, fbmem_start,
+						     fbmem_size);
+		}
+	}
+
+	printk("%luKiB framebuffer memory at address 0x%08lx\n",
+	       fbmem_size >> 10, fbmem_start);
+	atstk1000_fb0_data.fbmem_start = fbmem_start;
+	atstk1000_fb0_data.fbmem_size = fbmem_size;
+}

arch/avr32/boards/atstk1000/spi.c

+/*
+ * ATSTK1000 SPI devices
+ *
+ * Copyright (C) 2005 Atmel Norway
+ *
+ * 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/device.h>
+#include <linux/spi/spi.h>
+
+static struct spi_board_info spi_board_info[] __initdata = {
+	{
+		.modalias	= "ltv350qv",
+		.max_speed_hz	= 16000000,
+		.bus_num	= 0,
+		.chip_select	= 1,
+	},
+};
+
+static int board_init_spi(void)
+{
+	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+	return 0;
+}
+arch_initcall(board_init_spi);

arch/avr32/boot/images/Makefile

+#
+# Copyright (C) 2004-2006 Atmel Corporation
+#
+# 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.
+#
+
+MKIMAGE		:= $(srctree)/scripts/mkuboot.sh
+
+extra-y		:= vmlinux.bin vmlinux.gz
+
+OBJCOPYFLAGS_vmlinux.bin := -O binary
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+quiet_cmd_uimage = UIMAGE $@
+      cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A avr32 -O linux -T kernel	\
+		-C gzip -a $(CONFIG_LOAD_ADDRESS) -e $(CONFIG_ENTRY_ADDRESS)	\
+		-n 'Linux-$(KERNELRELEASE)' -d $< $@
+
+targets += uImage uImage.srec
+$(obj)/uImage: $(obj)/vmlinux.gz
+	$(call if_changed,uimage)
+	@echo '  Image $@ is ready'
+
+OBJCOPYFLAGS_uImage.srec := -I binary -O srec
+$(obj)/uImage.srec: $(obj)/uImage
+	$(call if_changed,objcopy)
+
+OBJCOPYFLAGS_vmlinux.elf := --change-section-lma .text-0x80000000 \
+			    --change-section-lma __ex_table-0x80000000 \
+			    --change-section-lma .rodata-0x80000000 \
+			    --change-section-lma .data-0x80000000 \
+			    --change-section-lma .init-0x80000000 \
+			    --change-section-lma .bss-0x80000000 \
+			    --change-section-lma .initrd-0x80000000 \
+			    --change-section-lma __param-0x80000000 \
+			    --change-section-lma __ksymtab-0x80000000 \
+			    --change-section-lma __ksymtab_gpl-0x80000000 \
+			    --change-section-lma __kcrctab-0x80000000 \
+			    --change-section-lma __kcrctab_gpl-0x80000000 \
+			    --change-section-lma __ksymtab_strings-0x80000000 \
+			    --change-section-lma .got-0x80000000 \
+			    --set-start 0xa0000000
+$(obj)/vmlinux.elf: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+quiet_cmd_sfdwarf = SFDWARF $@
+      cmd_sfdwarf = sfdwarf $< TO $@ GNUAVR IW $(SFDWARF_FLAGS) > $(obj)/sfdwarf.log
+
+$(obj)/vmlinux.cso: $(obj)/vmlinux.elf FORCE
+	$(call if_changed,sfdwarf)
+
+install: $(BOOTIMAGE)
+	sh $(srctree)/install-kernel.sh $<
+
+# Generated files to be removed upon make clean
+clean-files	:= vmlinux* uImage uImage.srec

arch/avr32/boot/u-boot/Makefile

+extra-y		:= head.o
+
+obj-y		:= empty.o

arch/avr32/boot/u-boot/empty.S

+/* Empty file */

arch/avr32/boot/u-boot/head.S

+/*
+ * Startup code for use with the u-boot bootloader.
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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/setup.h>
+
+	/*
+	 * The kernel is loaded where we want it to be and all caches
+	 * have just been flushed. We get two parameters from u-boot:
+	 *
+	 * r12 contains a magic number (ATAG_MAGIC)
+	 * r11 points to a tag table providing information about
+	 *     the system.
+	 */
+	.section .init.text,"ax"
+	.global _start
+_start:
+	/* Check if the boot loader actually provided a tag table */
+	lddpc	r0, magic_number
+	cp.w	r12, r0
+	brne	no_tag_table
+
+	/* Initialize .bss */
+	lddpc	r2, bss_start_addr
+	lddpc   r3, end_addr
+	mov	r0, 0
+	mov	r1, 0
+1:      st.d    r2++, r0
+	cp      r2, r3
+	brlo    1b
+
+	/*
+	 * Save the tag table address for later use. This must be done
+	 * _after_ .bss has been initialized...
+	 */
+	lddpc	r0, tag_table_addr
+	st.w	r0[0], r11
+
+	/* Jump to loader-independent setup code */
+	rjmp	kernel_entry
+
+	.align	2
+magic_number:
+	.long	ATAG_MAGIC
+tag_table_addr:
+	.long	bootloader_tags
+bss_start_addr:
+	.long   __bss_start
+end_addr:
+	.long   _end
+
+no_tag_table:
+	sub	r12, pc, (. - 2f)
+	bral	panic
+2:	.asciz	"Boot loader didn't provide correct magic number\n"

arch/avr32/configs/atstk1002_defconfig

+#
+# Automatically generated make config: don't edit
+# Linux kernel version: 2.6.18-rc1
+# Tue Jul 11 12:41:36 2006
+#
+CONFIG_AVR32=y
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_GENERIC_IRQ_PROBE=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
+
+#
+# Code maturity level options
+#
+CONFIG_EXPERIMENTAL=y
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
+
+#
+# General setup
+#
+CONFIG_LOCALVERSION=""
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SWAP=y
+# CONFIG_SYSVIPC is not set
+# CONFIG_POSIX_MQUEUE is not set
+# CONFIG_BSD_PROCESS_ACCT is not set
+CONFIG_SYSCTL=y
+# CONFIG_AUDIT is not set
+# CONFIG_IKCONFIG is not set
+# CONFIG_RELAY is not set
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EMBEDDED=y
+CONFIG_KALLSYMS=y
+# CONFIG_KALLSYMS_ALL is not set
+# CONFIG_KALLSYMS_EXTRA_PASS is not set
+CONFIG_HOTPLUG=y
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_ELF_CORE=y
+# CONFIG_BASE_FULL is not set
+# CONFIG_FUTEX is not set
+# CONFIG_EPOLL is not set
+CONFIG_SHMEM=y
+# CONFIG_SLAB is not set
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_TINY_SHMEM is not set
+CONFIG_BASE_SMALL=1
+CONFIG_SLOB=y
+
+#
+# Loadable module support
+#
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_MODULE_FORCE_UNLOAD is not set
+# CONFIG_MODVERSIONS is not set
+# CONFIG_MODULE_SRCVERSION_ALL is not set
+# CONFIG_KMOD is not set
+
+#
+# Block layer
+#
+# CONFIG_BLK_DEV_IO_TRACE is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+# CONFIG_IOSCHED_AS is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
+# CONFIG_DEFAULT_AS is not set
+# CONFIG_DEFAULT_DEADLINE is not set
+# CONFIG_DEFAULT_CFQ is not set
+CONFIG_DEFAULT_NOOP=y
+CONFIG_DEFAULT_IOSCHED="noop"
+
+#
+# System Type and features
+#
+CONFIG_SUBARCH_AVR32B=y
+CONFIG_MMU=y
+CONFIG_PERFORMANCE_COUNTERS=y
+CONFIG_PLATFORM_AT32AP=y
+CONFIG_CPU_AT32AP7000=y
+CONFIG_BOARD_ATSTK1002=y
+CONFIG_BOARD_ATSTK1000=y
+CONFIG_LOADER_U_BOOT=y
+CONFIG_LOAD_ADDRESS=0x10000000
+CONFIG_ENTRY_ADDRESS=0x90000000
+CONFIG_PHYS_OFFSET=0x10000000
+CONFIG_PREEMPT_NONE=y
+# CONFIG_PREEMPT_VOLUNTARY is not set
+# CONFIG_PREEMPT is not set
+# CONFIG_HAVE_ARCH_BOOTMEM_NODE is not set
+# CONFIG_ARCH_HAVE_MEMORY_PRESENT is not set
+# CONFIG_NEED_NODE_MEMMAP_SIZE is not set
+CONFIG_ARCH_FLATMEM_ENABLE=y
+# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
+# CONFIG_ARCH_SPARSEMEM_ENABLE is not set
+CONFIG_SELECT_MEMORY_MODEL=y
+CONFIG_FLATMEM_MANUAL=y
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+# CONFIG_SPARSEMEM_MANUAL is not set
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+# CONFIG_SPARSEMEM_STATIC is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_RESOURCES_64BIT is not set
+# CONFIG_OWNERSHIP_TRACE is not set
+# CONFIG_HZ_100 is not set
+CONFIG_HZ_250=y
+# CONFIG_HZ_1000 is not set
+CONFIG_HZ=250
+CONFIG_CMDLINE=""
+
+#
+# Bus options
+#
+
+#
+# PCCARD (PCMCIA/CardBus) support
+#
+# CONFIG_PCCARD is not set
+
+#
+# Executable file formats
+#
+CONFIG_BINFMT_ELF=y
+# CONFIG_BINFMT_MISC is not set
+
+#
+# Networking
+#
+CONFIG_NET=y
+
+#
+# Networking options
+#
+# CONFIG_NETDEBUG is not set
+CONFIG_PACKET=y
+CONFIG_PACKET_MMAP=y
+CONFIG_UNIX=y
+# CONFIG_NET_KEY is not set
+CONFIG_INET=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_ADVANCED_ROUTER is not set
+CONFIG_IP_FIB_HASH=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+# CONFIG_IP_PNP_BOOTP is not set
+# CONFIG_IP_PNP_RARP is not set
+# CONFIG_NET_IPIP is not set
+# CONFIG_NET_IPGRE is not set
+# CONFIG_ARPD is not set
+# CONFIG_SYN_COOKIES is not set
+# CONFIG_INET_AH is not set
+# CONFIG_INET_ESP is not set
+# CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
+# CONFIG_INET_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+# CONFIG_TCP_CONG_ADVANCED is not set
+CONFIG_TCP_CONG_BIC=y
+# CONFIG_IPV6 is not set
+# CONFIG_INET6_XFRM_TUNNEL is not set
+# CONFIG_INET6_TUNNEL is not set
+# CONFIG_NETWORK_SECMARK is not set
+# CONFIG_NETFILTER is not set
+
+#
+# DCCP Configuration (EXPERIMENTAL)
+#
+# CONFIG_IP_DCCP is not set
+
+#
+# SCTP Configuration (EXPERIMENTAL)
+#
+# CONFIG_IP_SCTP is not set
+
+#
+# TIPC Configuration (EXPERIMENTAL)
+#
+# CONFIG_TIPC is not set
+# CONFIG_ATM is not set
+# CONFIG_BRIDGE is not set
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_DECNET is not set
+# CONFIG_LLC2 is not set
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_NET_DIVERT is not set
+# CONFIG_ECONET is not set
+# CONFIG_WAN_ROUTER is not set
+
+#
+# QoS and/or fair queueing
+#
+# CONFIG_NET_SCHED is not set
+
+#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+# CONFIG_NET_TCPPROBE is not set
+# CONFIG_HAMRADIO is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
+# CONFIG_IEEE80211 is not set
+
+#
+# Device Drivers
+#
+
+#
+# Generic Driver Options
+#
+CONFIG_STANDALONE=y
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FW_LOADER is not set
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_SYS_HYPERVISOR is not set
+
+#
+# Connector - unified userspace <-> kernelspace linker
+#
+# CONFIG_CONNECTOR is not set
+
+#
+# Memory Technology Devices (MTD)
+#
+# CONFIG_MTD is not set
+
+#
+# Parallel port support
+#
+# CONFIG_PARPORT is not set
+
+#
+# Plug and Play support
+#
+
+#
+# Block devices
+#
+# CONFIG_BLK_DEV_COW_COMMON is not set
+CONFIG_BLK_DEV_LOOP=m
+# CONFIG_BLK_DEV_CRYPTOLOOP is not set
+CONFIG_BLK_DEV_NBD=m
+CONFIG_BLK_DEV_RAM=m
+CONFIG_BLK_DEV_RAM_COUNT=16
+CONFIG_BLK_DEV_RAM_SIZE=4096
+CONFIG_BLK_DEV_INITRD=y
+# CONFIG_CDROM_PKTCDVD is not set
+# CONFIG_ATA_OVER_ETH is not set
+
+#
+# ATA/ATAPI/MFM/RLL support
+#
+# CONFIG_IDE is not set
+
+#
+# SCSI device support
+#
+# CONFIG_RAID_ATTRS is not set
+# CONFIG_SCSI is not set
+
+#
+# Multi-device support (RAID and LVM)
+#
+# CONFIG_MD is not set
+
+#
+# Fusion MPT device support
+#
+# CONFIG_FUSION is not set
+
+#
+# IEEE 1394 (FireWire) support
+#
+
+#
+# I2O device support
+#
+
+#
+# Network device support
+#
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+# CONFIG_BONDING is not set
+# CONFIG_EQUALIZER is not set
+CONFIG_TUN=m
+
+#
+# PHY device support
+#
+# CONFIG_PHYLIB is not set
+
+#
+# Ethernet (10 or 100Mbit)
+#
+CONFIG_NET_ETHERNET=y
+CONFIG_MII=y
+CONFIG_MACB=y
+
+#
+# Ethernet (1000 Mbit)
+#
+
+#
+# Ethernet (10000 Mbit)
+#
+
+#
+# Token Ring devices
+#
+
+#
+# Wireless LAN (non-hamradio)
+#
+# CONFIG_NET_RADIO is not set
+
+#
+# Wan interfaces
+#
+# CONFIG_WAN is not set
+CONFIG_PPP=m
+# CONFIG_PPP_MULTILINK is not set
+# CONFIG_PPP_FILTER is not set
+CONFIG_PPP_ASYNC=m
+# CONFIG_PPP_SYNC_TTY is not set
+CONFIG_PPP_DEFLATE=m
+# CONFIG_PPP_BSDCOMP is not set
+# CONFIG_PPP_MPPE is not set
+# CONFIG_PPPOE is not set
+# CONFIG_SLIP is not set
+# CONFIG_SHAPER is not set
+# CONFIG_NETCONSOLE is not set
+# CONFIG_NETPOLL is not set
+# CONFIG_NET_POLL_CONTROLLER is not set
+
+#
+# ISDN subsystem
+#
+# CONFIG_ISDN is not set
+
+#
+# Telephony Support
+#
+# CONFIG_PHONE is not set
+
+#
+# Input device support
+#
+# CONFIG_INPUT is not set
+
+#
+# Hardware I/O ports
+#
+# CONFIG_SERIO is not set
+# CONFIG_GAMEPORT is not set
+
+#
+# Character devices
+#
+# CONFIG_VT is not set
+# CONFIG_SERIAL_NONSTANDARD is not set
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+
+#
+# Non-8250 serial port support
+#
+CONFIG_SERIAL_AT91=y
+CONFIG_SERIAL_AT91_CONSOLE=y
+# CONFIG_SERIAL_AT91_TTYAT is not set
+CONFIG_SERIAL_CORE=y
+CONFIG_SERIAL_CORE_CONSOLE=y
+CONFIG_UNIX98_PTYS=y
+# CONFIG_LEGACY_PTYS is not set
+
+#
+# IPMI
+#
+# CONFIG_IPMI_HANDLER is not set
+
+#
+# Watchdog Cards
+#
+# CONFIG_WATCHDOG is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_RTC is not set
+# CONFIG_GEN_RTC is not set
+# CONFIG_DTLK is not set
+# CONFIG_R3964 is not set
+
+#
+# Ftape, the floppy tape device driver
+#
+# CONFIG_RAW_DRIVER is not set
+
+#
+# TPM devices
+#
+# CONFIG_TCG_TPM is not set
+# CONFIG_TELCLOCK is not set
+
+#
+# I2C support
+#
+# CONFIG_I2C is not set
+
+#
+# SPI support
+#
+CONFIG_SPI=y
+# CONFIG_SPI_DEBUG is not set
+CONFIG_SPI_MASTER=y
+
+#
+# SPI Master Controller Drivers
+#
+CONFIG_SPI_ATMEL=m
+# CONFIG_SPI_BITBANG is not set
+
+#
+# SPI Protocol Masters
+#
+
+#
+# Dallas's 1-wire bus
+#
+
+#
+# Hardware Monitoring support
+#
+# CONFIG_HWMON is not set
+# CONFIG_HWMON_VID is not set
+
+#
+# Misc devices
+#
+
+#
+# Multimedia devices
+#
+# CONFIG_VIDEO_DEV is not set
+CONFIG_VIDEO_V4L2=y
+
+#
+# Digital Video Broadcasting Devices
+#
+# CONFIG_DVB is not set
+
+#
+# Graphics support
+#
+# CONFIG_FIRMWARE_EDID is not set
+CONFIG_FB=m
+CONFIG_FB_CFB_FILLRECT=m
+CONFIG_FB_CFB_COPYAREA=m
+CONFIG_FB_CFB_IMAGEBLIT=m
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+CONFIG_FB_SIDSA=m
+CONFIG_FB_SIDSA_DEFAULT_BPP=24
+# CONFIG_FB_S1D13XXX is not set
+# CONFIG_FB_VIRTUAL is not set
+
+#
+# Logo configuration
+#
+# CONFIG_LOGO is not set
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+CONFIG_LCD_CLASS_DEVICE=m
+CONFIG_LCD_DEVICE=y
+CONFIG_LCD_LTV350QV=m
+
+#
+# Sound
+#
+# CONFIG_SOUND is not set
+
+#
+# USB support
+#
+# CONFIG_USB_ARCH_HAS_HCD is not set
+# CONFIG_USB_ARCH_HAS_OHCI is not set
+# CONFIG_USB_ARCH_HAS_EHCI is not set
+
+#
+# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
+#
+
+#
+# USB Gadget Support
+#
+# CONFIG_USB_GADGET is not set
+
+#
+# MMC/SD Card support
+#
+# CONFIG_MMC is not set
+
+#
+# LED devices
+#
+# CONFIG_NEW_LEDS is not set
+
+#
+# LED drivers
+#
+
+#
+# LED Triggers
+#
+
+#
+# InfiniBand support
+#
+
+#
+# EDAC - error detection and reporting (RAS) (EXPERIMENTAL)
+#
+
+#
+# Real Time Clock
+#
+# CONFIG_RTC_CLASS is not set
+
+#
+# DMA Engine support
+#
+# CONFIG_DMA_ENGINE is not set
+
+#
+# DMA Clients
+#
+
+#
+# DMA Devices
+#
+
+#
+# File systems
+#
+CONFIG_EXT2_FS=y
+# CONFIG_EXT2_FS_XATTR is not set
+# CONFIG_EXT2_FS_XIP is not set
+# CONFIG_EXT3_FS is not set
+# CONFIG_REISERFS_FS is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_FS_POSIX_ACL is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_OCFS2_FS is not set
+CONFIG_MINIX_FS=m
+CONFIG_ROMFS_FS=m
+# CONFIG_INOTIFY is not set
+# CONFIG_QUOTA is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_AUTOFS_FS is not set
+# CONFIG_AUTOFS4_FS is not set
+# CONFIG_FUSE_FS is not set
+
+#
+# CD-ROM/DVD Filesystems
+#
+# CONFIG_ISO9660_FS is not set
+# CONFIG_UDF_FS is not set
+
+#
+# DOS/FAT/NT Filesystems
+#
+CONFIG_FAT_FS=m
+CONFIG_MSDOS_FS=m
+CONFIG_VFAT_FS=m
+CONFIG_FAT_DEFAULT_CODEPAGE=437
+CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
+# CONFIG_NTFS_FS is not set
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_SYSFS=y
+CONFIG_TMPFS=y
+# CONFIG_HUGETLB_PAGE is not set
+CONFIG_RAMFS=y
+CONFIG_CONFIGFS_FS=m
+
+#
+# Miscellaneous filesystems
+#
+# CONFIG_ADFS_FS is not set
+# CONFIG_AFFS_FS is not set
+# CONFIG_HFS_FS is not set
+# CONFIG_HFSPLUS_FS is not set
+# CONFIG_BEFS_FS is not set
+# CONFIG_BFS_FS is not set
+# CONFIG_EFS_FS is not set
+# CONFIG_CRAMFS is not set
+# CONFIG_VXFS_FS is not set
+# CONFIG_HPFS_FS is not set
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_SYSV_FS is not set
+# CONFIG_UFS_FS is not set
+
+#
+# Network File Systems
+#
+CONFIG_NFS_FS=y
+CONFIG_NFS_V3=y
+# CONFIG_NFS_V3_ACL is not set
+# CONFIG_NFS_V4 is not set
+# CONFIG_NFS_DIRECTIO is not set
+# CONFIG_NFSD is not set
+CONFIG_ROOT_NFS=y
+CONFIG_LOCKD=y
+CONFIG_LOCKD_V4=y
+CONFIG_NFS_COMMON=y
+CONFIG_SUNRPC=y
+# CONFIG_RPCSEC_GSS_KRB5 is not set
+# CONFIG_RPCSEC_GSS_SPKM3 is not set
+# CONFIG_SMB_FS is not set
+CONFIG_CIFS=m
+# CONFIG_CIFS_STATS is not set
+# CONFIG_CIFS_WEAK_PW_HASH is not set
+# CONFIG_CIFS_XATTR is not set
+# CONFIG_CIFS_DEBUG2 is not set
+# CONFIG_CIFS_EXPERIMENTAL is not set
+# CONFIG_NCP_FS is not set
+# CONFIG_CODA_FS is not set
+# CONFIG_AFS_FS is not set
+# CONFIG_9P_FS is not set
+
+#
+# Partition Types
+#
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_MSDOS_PARTITION=y
+
+#
+# Native Language Support
+#
+CONFIG_NLS=m
+CONFIG_NLS_DEFAULT="iso8859-1"
+CONFIG_NLS_CODEPAGE_437=m
+# CONFIG_NLS_CODEPAGE_737 is not set
+# CONFIG_NLS_CODEPAGE_775 is not set
+CONFIG_NLS_CODEPAGE_850=m
+# CONFIG_NLS_CODEPAGE_852 is not set
+# CONFIG_NLS_CODEPAGE_855 is not set
+# CONFIG_NLS_CODEPAGE_857 is not set
+# CONFIG_NLS_CODEPAGE_860 is not set
+# CONFIG_NLS_CODEPAGE_861 is not set
+# CONFIG_NLS_CODEPAGE_862 is not set
+# CONFIG_NLS_CODEPAGE_863 is not set
+# CONFIG_NLS_CODEPAGE_864 is not set
+# CONFIG_NLS_CODEPAGE_865 is not set
+# CONFIG_NLS_CODEPAGE_866 is not set
+# CONFIG_NLS_CODEPAGE_869 is not set
+# CONFIG_NLS_CODEPAGE_936 is not set
+# CONFIG_NLS_CODEPAGE_950 is not set
+# CONFIG_NLS_CODEPAGE_932 is not set
+# CONFIG_NLS_CODEPAGE_949 is not set
+# CONFIG_NLS_CODEPAGE_874 is not set
+# CONFIG_NLS_ISO8859_8 is not set
+# CONFIG_NLS_CODEPAGE_1250 is not set
+# CONFIG_NLS_CODEPAGE_1251 is not set
+# CONFIG_NLS_ASCII is not set
+CONFIG_NLS_ISO8859_1=m
+# CONFIG_NLS_ISO8859_2 is not set
+# CONFIG_NLS_ISO8859_3 is not set
+# CONFIG_NLS_ISO8859_4 is not set
+# CONFIG_NLS_ISO8859_5 is not set
+# CONFIG_NLS_ISO8859_6 is not set
+# CONFIG_NLS_ISO8859_7 is not set
+# CONFIG_NLS_ISO8859_9 is not set
+# CONFIG_NLS_ISO8859_13 is not set
+# CONFIG_NLS_ISO8859_14 is not set
+# CONFIG_NLS_ISO8859_15 is not set
+# CONFIG_NLS_KOI8_R is not set
+# CONFIG_NLS_KOI8_U is not set
+CONFIG_NLS_UTF8=m
+
+#
+# Kernel hacking
+#
+CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+CONFIG_PRINTK_TIME=y
+CONFIG_MAGIC_SYSRQ=y
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_DEBUG_KERNEL=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_DETECT_SOFTLOCKUP=y
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_RWSEMS is not set
+# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_KOBJECT is not set
+CONFIG_DEBUG_BUGVERBOSE=y
+# CONFIG_DEBUG_INFO is not set
+CONFIG_DEBUG_FS=y
+# CONFIG_DEBUG_VM is not set
+CONFIG_FRAME_POINTER=y
+# CONFIG_UNWIND_INFO is not set
+CONFIG_FORCED_INLINING=y
+# CONFIG_RCU_TORTURE_TEST is not set
+CONFIG_KPROBES=y
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITY is not set
+
+#
+# Cryptographic options
+#
+# CONFIG_CRYPTO is not set
+
+#
+# Hardware crypto devices
+#
+
+#
+# Library routines
+#
+CONFIG_CRC_CCITT=m
+# CONFIG_CRC16 is not set
+CONFIG_CRC32=m
+# CONFIG_LIBCRC32C is not set
+CONFIG_ZLIB_INFLATE=m
+CONFIG_ZLIB_DEFLATE=m

arch/avr32/kernel/Makefile

+#
+# Makefile for the Linux/AVR32 kernel.
+#
+
+extra-y				:= head.o vmlinux.lds
+
+obj-$(CONFIG_SUBARCH_AVR32B)	+= entry-avr32b.o
+obj-y				+= syscall_table.o syscall-stubs.o irq.o
+obj-y				+= setup.o traps.o semaphore.o ptrace.o
+obj-y				+= signal.o sys_avr32.o process.o time.o
+obj-y				+= init_task.o switch_to.o cpu.o
+obj-$(CONFIG_MODULES)		+= module.o avr32_ksyms.o
+obj-$(CONFIG_KPROBES)		+= kprobes.o
+
+USE_STANDARD_AS_RULE		:= true
+
+%.lds: %.lds.c FORCE
+	$(call if_changed_dep,cpp_lds_S)

arch/avr32/kernel/asm-offsets.c

+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/thread_info.h>
+
+#define DEFINE(sym, val) \
+        asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+#define OFFSET(sym, str, mem) \
+        DEFINE(sym, offsetof(struct str, mem));
+
+void foo(void)
+{
+	OFFSET(TI_task, thread_info, task);
+	OFFSET(TI_exec_domain, thread_info, exec_domain);
+	OFFSET(TI_flags, thread_info, flags);
+	OFFSET(TI_cpu, thread_info, cpu);
+	OFFSET(TI_preempt_count, thread_info, preempt_count);
+	OFFSET(TI_restart_block, thread_info, restart_block);
+}

arch/avr32/kernel/avr32_ksyms.c

+/*
+ * Export AVR32-specific functions for loadable modules.
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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>
+
+#include <asm/checksum.h>
+#include <asm/uaccess.h>
+#include <asm/delay.h>
+
+/*
+ * GCC functions
+ */
+extern unsigned long long __avr32_lsl64(unsigned long long u, unsigned long b);
+extern unsigned long long __avr32_lsr64(unsigned long long u, unsigned long b);
+extern unsigned long long __avr32_asr64(unsigned long long u, unsigned long b);
+EXPORT_SYMBOL(__avr32_lsl64);
+EXPORT_SYMBOL(__avr32_lsr64);
+EXPORT_SYMBOL(__avr32_asr64);
+
+/*
+ * String functions
+ */
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);
+
+/*
+ * Userspace access stuff.
+ */
+EXPORT_SYMBOL(copy_from_user);
+EXPORT_SYMBOL(copy_to_user);
+EXPORT_SYMBOL(__copy_user);
+EXPORT_SYMBOL(strncpy_from_user);
+EXPORT_SYMBOL(__strncpy_from_user);
+EXPORT_SYMBOL(clear_user);
+EXPORT_SYMBOL(__clear_user);
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy_generic);
+
+/* Delay loops (lib/delay.S) */
+EXPORT_SYMBOL(__ndelay);
+EXPORT_SYMBOL(__udelay);
+EXPORT_SYMBOL(__const_udelay);
+
+/* Bit operations (lib/findbit.S) */
+EXPORT_SYMBOL(find_first_zero_bit);
+EXPORT_SYMBOL(find_next_zero_bit);
+EXPORT_SYMBOL(find_first_bit);
+EXPORT_SYMBOL(find_next_bit);
+EXPORT_SYMBOL(generic_find_next_zero_le_bit);

arch/avr32/kernel/cpu.c

+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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/init.h>
+#include <linux/sysdev.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/percpu.h>
+#include <linux/param.h>
+#include <linux/errno.h>
+
+#include <asm/setup.h>
+#include <asm/sysreg.h>
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+#ifdef CONFIG_PERFORMANCE_COUNTERS
+
+/*
+ * XXX: If/when a SMP-capable implementation of AVR32 will ever be
+ * made, we must make sure that the code executes on the correct CPU.
+ */
+static ssize_t show_pc0event(struct sys_device *dev, char *buf)
+{
+	unsigned long pccr;
+
+	pccr = sysreg_read(PCCR);
+	return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
+}
+static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf || val > 0x3f)
+		return -EINVAL;
+	val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
+	sysreg_write(PCCR, val);
+	return count;
+}
+static ssize_t show_pc0count(struct sys_device *dev, char *buf)
+{
+	unsigned long pcnt0;
+
+	pcnt0 = sysreg_read(PCNT0);
+	return sprintf(buf, "%lu\n", pcnt0);
+}
+static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+	sysreg_write(PCNT0, val);
+
+	return count;
+}
+
+static ssize_t show_pc1event(struct sys_device *dev, char *buf)
+{
+	unsigned long pccr;
+
+	pccr = sysreg_read(PCCR);
+	return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
+}
+static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf || val > 0x3f)
+		return -EINVAL;
+	val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
+	sysreg_write(PCCR, val);
+	return count;
+}
+static ssize_t show_pc1count(struct sys_device *dev, char *buf)
+{
+	unsigned long pcnt1;
+
+	pcnt1 = sysreg_read(PCNT1);
+	return sprintf(buf, "%lu\n", pcnt1);
+}
+static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+	sysreg_write(PCNT1, val);
+
+	return count;
+}
+
+static ssize_t show_pccycles(struct sys_device *dev, char *buf)
+{
+	unsigned long pccnt;
+
+	pccnt = sysreg_read(PCCNT);
+	return sprintf(buf, "%lu\n", pccnt);
+}
+static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+	sysreg_write(PCCNT, val);
+
+	return count;
+}
+
+static ssize_t show_pcenable(struct sys_device *dev, char *buf)
+{
+	unsigned long pccr;
+
+	pccr = sysreg_read(PCCR);
+	return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
+}
+static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
+			      size_t count)
+{
+	unsigned long pccr, val;
+	char *endp;
+
+	val = simple_strtoul(buf, &endp, 0);
+	if (endp == buf)
+		return -EINVAL;
+	if (val)
+		val = 1;
+
+	pccr = sysreg_read(PCCR);
+	pccr = (pccr & ~1UL) | val;
+	sysreg_write(PCCR, pccr);
+
+	return count;
+}
+
+static SYSDEV_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
+static SYSDEV_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
+static SYSDEV_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
+static SYSDEV_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
+static SYSDEV_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
+static SYSDEV_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
+
+#endif /* CONFIG_PERFORMANCE_COUNTERS */
+
+static int __init topology_init(void)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct cpu *c = &per_cpu(cpu_devices, cpu);
+
+		register_cpu(c, cpu);
+
+#ifdef CONFIG_PERFORMANCE_COUNTERS
+		sysdev_create_file(&c->sysdev, &attr_pc0event);
+		sysdev_create_file(&c->sysdev, &attr_pc0count);
+		sysdev_create_file(&c->sysdev, &attr_pc1event);
+		sysdev_create_file(&c->sysdev, &attr_pc1count);
+		sysdev_create_file(&c->sysdev, &attr_pccycles);
+		sysdev_create_file(&c->sysdev, &attr_pcenable);
+#endif
+	}
+
+	return 0;
+}
+
+subsys_initcall(topology_init);
+
+static const char *cpu_names[] = {
+	"Morgan",
+	"AP7000",
+};
+#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
+
+static const char *arch_names[] = {
+	"AVR32A",
+	"AVR32B",
+};
+#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
+
+static const char *mmu_types[] = {
+	"No MMU",
+	"ITLB and DTLB",
+	"Shared TLB",
+	"MPU"
+};
+
+void __init setup_processor(void)
+{
+	unsigned long config0, config1;
+	unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
+	unsigned tmp;
+
+	config0 = sysreg_read(CONFIG0); /* 0x0000013e; */
+	config1 = sysreg_read(CONFIG1); /* 0x01f689a2; */
+	cpu_id = config0 >> 24;
+	cpu_rev = (config0 >> 16) & 0xff;
+	arch_id = (config0 >> 13) & 0x07;
+	arch_rev = (config0 >> 10) & 0x07;
+	mmu_type = (config0 >> 7) & 0x03;
+
+	boot_cpu_data.arch_type = arch_id;
+	boot_cpu_data.cpu_type = cpu_id;
+	boot_cpu_data.arch_revision = arch_rev;
+	boot_cpu_data.cpu_revision = cpu_rev;
+	boot_cpu_data.tlb_config = mmu_type;
+
+	tmp = (config1 >> 13) & 0x07;
+	if (tmp) {
+		boot_cpu_data.icache.ways = 1 << ((config1 >> 10) & 0x07);
+		boot_cpu_data.icache.sets = 1 << ((config1 >> 16) & 0x0f);
+		boot_cpu_data.icache.linesz = 1 << (tmp + 1);
+	}
+	tmp = (config1 >> 3) & 0x07;
+	if (tmp) {
+		boot_cpu_data.dcache.ways = 1 << (config1 & 0x07);
+		boot_cpu_data.dcache.sets = 1 << ((config1 >> 6) & 0x0f);
+		boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
+	}
+
+	if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
+		printk ("Unknown CPU configuration (ID %02x, arch %02x), "
+			"continuing anyway...\n",
+			cpu_id, arch_id);
+		return;
+	}
+
+	printk ("CPU: %s [%02x] revision %d (%s revision %d)\n",
+		cpu_names[cpu_id], cpu_id, cpu_rev,
+		arch_names[arch_id], arch_rev);
+	printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
+	printk ("CPU: features:");
+	if (config0 & (1 << 6))
+		printk(" fpu");
+	if (config0 & (1 << 5))
+		printk(" java");
+	if (config0 & (1 << 4))
+		printk(" perfctr");
+	if (config0 & (1 << 3))
+		printk(" ocd");
+	printk("\n");
+}
+
+#ifdef CONFIG_PROC_FS
+static int c_show(struct seq_file *m, void *v)
+{
+	unsigned int icache_size, dcache_size;
+	unsigned int cpu = smp_processor_id();
+
+	icache_size = boot_cpu_data.icache.ways *
+		boot_cpu_data.icache.sets *
+		boot_cpu_data.icache.linesz;
+	dcache_size = boot_cpu_data.dcache.ways *
+		boot_cpu_data.dcache.sets *
+		boot_cpu_data.dcache.linesz;
+
+	seq_printf(m, "processor\t: %d\n", cpu);
+
+	if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
+		seq_printf(m, "cpu family\t: %s revision %d\n",
+			   arch_names[boot_cpu_data.arch_type],
+			   boot_cpu_data.arch_revision);
+	if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
+		seq_printf(m, "cpu type\t: %s revision %d\n",
+			   cpu_names[boot_cpu_data.cpu_type],
+			   boot_cpu_data.cpu_revision);
+
+	seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
+		   icache_size >> 10,
+		   boot_cpu_data.icache.ways,
+		   boot_cpu_data.icache.sets,
+		   boot_cpu_data.icache.linesz);
+	seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
+		   dcache_size >> 10,
+		   boot_cpu_data.dcache.ways,
+		   boot_cpu_data.dcache.sets,
+		   boot_cpu_data.dcache.linesz);
+	seq_printf(m, "bogomips\t: %lu.%02lu\n",
+		   boot_cpu_data.loops_per_jiffy / (500000/HZ),
+		   (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
+
+	return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	return *pos < 1 ? (void *)1 : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	++*pos;
+	return NULL;
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+
+}
+
+struct seq_operations cpuinfo_op = {
+	.start	= c_start,
+	.next	= c_next,
+	.stop	= c_stop,
+	.show	= c_show
+};
+#endif /* CONFIG_PROC_FS */

arch/avr32/kernel/entry-avr32b.S

+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+/*
+ * This file contains the low-level entry-points into the kernel, that is,
+ * exception handlers, debug trap handlers, interrupt handlers and the
+ * system call handler.
+ */
+#include <linux/errno.h>
+
+#include <asm/asm.h>
+#include <asm/hardirq.h>
+#include <asm/irq.h>
+#include <asm/ocd.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/ptrace.h>
+#include <asm/sysreg.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+
+#ifdef CONFIG_PREEMPT
+# define preempt_stop		mask_interrupts
+#else
+# define preempt_stop
+# define fault_resume_kernel	fault_restore_all
+#endif
+
+#define __MASK(x)	((1 << (x)) - 1)
+#define IRQ_MASK	((__MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT) | \
+			 (__MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT))
+
+	.section .ex.text,"ax",@progbits
+	.align	2
+exception_vectors:
+	bral	handle_critical
+	.align	2
+	bral	handle_critical
+	.align	2
+	bral	do_bus_error_write
+	.align	2
+	bral	do_bus_error_read
+	.align	2
+	bral	do_nmi_ll
+	.align	2
+	bral	handle_address_fault
+	.align	2
+	bral	handle_protection_fault
+	.align	2
+	bral	handle_debug
+	.align	2
+	bral	do_illegal_opcode_ll
+	.align	2
+	bral	do_illegal_opcode_ll
+	.align	2
+	bral	do_illegal_opcode_ll
+	.align	2
+	bral	do_fpe_ll
+	.align	2
+	bral	do_illegal_opcode_ll
+	.align	2
+	bral	handle_address_fault
+	.align	2
+	bral	handle_address_fault
+	.align	2
+	bral	handle_protection_fault
+	.align	2
+	bral	handle_protection_fault
+	.align	2
+	bral	do_dtlb_modified
+
+	/*
+	 * r0 :	PGD/PT/PTE
+	 * r1 : Offending address
+	 * r2 : Scratch register
+	 * r3 : Cause (5, 12 or 13)
+	 */
+#define	tlbmiss_save	pushm	r0-r3
+#define tlbmiss_restore	popm	r0-r3
+
+	.section .tlbx.ex.text,"ax",@progbits
+	.global	itlb_miss
+itlb_miss:
+	tlbmiss_save
+	rjmp	tlb_miss_common
+
+	.section .tlbr.ex.text,"ax",@progbits
+dtlb_miss_read:
+	tlbmiss_save
+	rjmp	tlb_miss_common
+
+	.section .tlbw.ex.text,"ax",@progbits
+dtlb_miss_write:
+	tlbmiss_save
+
+	.global	tlb_miss_common
+tlb_miss_common:
+	mfsr	r0, SYSREG_PTBR
+	mfsr	r1, SYSREG_TLBEAR
+
+	/* Is it the vmalloc space? */
+	bld	r1, 31
+	brcs	handle_vmalloc_miss
+
+	/* First level lookup */
+pgtbl_lookup:
+	lsr	r2, r1, PGDIR_SHIFT
+	ld.w	r0, r0[r2 << 2]
+	bld	r0, _PAGE_BIT_PRESENT
+	brcc	page_table_not_present
+
+	/* TODO: Check access rights on page table if necessary */
+
+	/* Translate to virtual address in P1. */
+	andl	r0, 0xf000
+	sbr	r0, 31
+
+	/* Second level lookup */
+	lsl	r1, (32 - PGDIR_SHIFT)
+	lsr	r1, (32 - PGDIR_SHIFT) + PAGE_SHIFT
+	add	r2, r0, r1 << 2
+	ld.w	r1, r2[0]
+	bld	r1, _PAGE_BIT_PRESENT
+	brcc	page_not_present
+
+	/* Mark the page as accessed */
+	sbr	r1, _PAGE_BIT_ACCESSED
+	st.w	r2[0], r1
+
+	/* Drop software flags */
+	andl	r1, _PAGE_FLAGS_HARDWARE_MASK & 0xffff
+	mtsr	SYSREG_TLBELO, r1
+
+	/* Figure out which entry we want to replace */
+	mfsr	r0, SYSREG_TLBARLO
+	clz	r2, r0
+	brcc	1f
+	mov	r1, -1			/* All entries have been accessed, */
+	mtsr	SYSREG_TLBARLO, r1	/* so reset TLBAR */
+	mov	r2, 0			/* and start at 0 */
+1:	mfsr	r1, SYSREG_MMUCR
+	lsl	r2, 14
+	andl	r1, 0x3fff, COH
+	or	r1, r2
+	mtsr	SYSREG_MMUCR, r1
+
+	tlbw
+
+	tlbmiss_restore
+	rete
+
+handle_vmalloc_miss:
+	/* Simply do the lookup in init's page table */
+	mov	r0, lo(swapper_pg_dir)
+	orh	r0, hi(swapper_pg_dir)
+	rjmp	pgtbl_lookup
+
+
+	/* ---                    System Call                    --- */
+
+	.section .scall.text,"ax",@progbits
+system_call:
+	pushm	r12		/* r12_orig */
+	stmts	--sp, r0-lr
+	zero_fp
+	mfsr	r0, SYSREG_RAR_SUP
+	mfsr	r1, SYSREG_RSR_SUP
+	stm	--sp, r0-r1
+
+	/* check for syscall tracing */
+	get_thread_info r0
+	ld.w	r1, r0[TI_flags]
+	bld	r1, TIF_SYSCALL_TRACE
+	brcs	syscall_trace_enter
+
+syscall_trace_cont:
+	cp.w	r8, NR_syscalls
+	brhs	syscall_badsys
+
+	lddpc   lr, syscall_table_addr
+	ld.w    lr, lr[r8 << 2]
+	mov	r8, r5		/* 5th argument (6th is pushed by stub) */
+	icall   lr
+
+	.global	syscall_return
+syscall_return:
+	get_thread_info r0
+	mask_interrupts		/* make sure we don't miss an interrupt
+				   setting need_resched or sigpending
+				   between sampling and the rets */
+
+	/* Store the return value so that the correct value is loaded below */
+	stdsp   sp[REG_R12], r12
+
+	ld.w	r1, r0[TI_flags]
+	andl	r1, _TIF_ALLWORK_MASK, COH
+	brne	syscall_exit_work
+
+syscall_exit_cont:
+	popm	r8-r9
+	mtsr	SYSREG_RAR_SUP, r8
+	mtsr	SYSREG_RSR_SUP, r9
+	ldmts	sp++, r0-lr
+	sub	sp, -4		/* r12_orig */
+	rets
+
+	.align	2
+syscall_table_addr:
+	.long   sys_call_table
+
+syscall_badsys:
+	mov	r12, -ENOSYS
+	rjmp	syscall_return
+
+	.global ret_from_fork
+ret_from_fork:
+	rcall   schedule_tail
+
+	/* check for syscall tracing */
+	get_thread_info r0
+	ld.w	r1, r0[TI_flags]
+	andl	r1, _TIF_ALLWORK_MASK, COH
+	brne	syscall_exit_work
+	rjmp    syscall_exit_cont
+
+syscall_trace_enter:
+	pushm	r8-r12
+	rcall	syscall_trace
+	popm	r8-r12
+	rjmp	syscall_trace_cont
+
+syscall_exit_work:
+	bld	r1, TIF_SYSCALL_TRACE
+	brcc	1f
+	unmask_interrupts
+	rcall	syscall_trace
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+
+1:	bld	r1, TIF_NEED_RESCHED
+	brcc	2f
+	unmask_interrupts
+	rcall	schedule
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	1b
+
+2:	mov	r2, _TIF_SIGPENDING | _TIF_RESTORE_SIGMASK
+	tst	r1, r2
+	breq	3f
+	unmask_interrupts
+	mov	r12, sp
+	mov	r11, r0
+	rcall	do_notify_resume
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	1b
+
+3:	bld	r1, TIF_BREAKPOINT
+	brcc	syscall_exit_cont
+	mfsr	r3, SYSREG_TLBEHI
+	lddsp	r2, sp[REG_PC]
+	andl	r3, 0xff, COH
+	lsl	r3, 1
+	sbr	r3, 30
+	sbr	r3, 0
+	mtdr	DBGREG_BWA2A, r2
+	mtdr	DBGREG_BWC2A, r3
+	rjmp	syscall_exit_cont
+
+
+	/* The slow path of the TLB miss handler */
+page_table_not_present:
+page_not_present:
+	tlbmiss_restore
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_page_fault
+	rjmp	ret_from_exception
+
+	/* This function expects to find offending PC in SYSREG_RAR_EX */
+save_full_context_ex:
+	mfsr	r8, SYSREG_RSR_EX
+	mov	r12, r8
+	andh	r8, (MODE_MASK >> 16), COH
+	mfsr	r11, SYSREG_RAR_EX
+	brne	2f
+
+1:	pushm	r11, r12	/* PC and SR */
+	unmask_exceptions
+	ret	r12
+
+2:	sub	r10, sp, -(FRAME_SIZE_FULL - REG_LR)
+	stdsp	sp[4], r10	/* replace saved SP */
+	rjmp	1b
+
+	/* Low-level exception handlers */
+handle_critical:
+	pushm	r12
+	pushm	r0-r12
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_critical_exception
+
+	/* We should never get here... */
+bad_return:
+	sub	r12, pc, (. - 1f)
+	bral	panic
+	.align	2
+1:	.asciz	"Return from critical exception!"
+
+	.align	1
+do_bus_error_write:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mov	r11, 1
+	rjmp	1f
+
+do_bus_error_read:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mov	r11, 0
+1:	mfsr	r12, SYSREG_BEAR
+	mov	r10, sp
+	rcall	do_bus_error
+	rjmp	ret_from_exception
+
+	.align	1
+do_nmi_ll:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	/* FIXME: Make sure RAR_NMI and RSR_NMI are pushed instead of *_EX */
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_nmi
+	rjmp	bad_return
+
+handle_address_fault:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_address_exception
+	rjmp	ret_from_exception
+
+handle_protection_fault:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_page_fault
+	rjmp	ret_from_exception
+
+	.align	1
+do_illegal_opcode_ll:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	mfsr	r12, SYSREG_ECR
+	mov	r11, sp
+	rcall	do_illegal_opcode
+	rjmp	ret_from_exception
+
+do_dtlb_modified:
+	pushm	r0-r3
+	mfsr	r1, SYSREG_TLBEAR
+	mfsr	r0, SYSREG_PTBR
+	lsr	r2, r1, PGDIR_SHIFT
+	ld.w	r0, r0[r2 << 2]
+	lsl	r1, (32 - PGDIR_SHIFT)
+	lsr	r1, (32 - PGDIR_SHIFT) + PAGE_SHIFT
+
+	/* Translate to virtual address in P1 */
+	andl	r0, 0xf000
+	sbr	r0, 31
+	add	r2, r0, r1 << 2
+	ld.w	r3, r2[0]
+	sbr	r3, _PAGE_BIT_DIRTY
+	mov	r0, r3
+	st.w	r2[0], r3
+
+	/* The page table is up-to-date. Update the TLB entry as well */
+	andl	r0, lo(_PAGE_FLAGS_HARDWARE_MASK)
+	mtsr	SYSREG_TLBELO, r0
+
+	/* MMUCR[DRP] is updated automatically, so let's go... */
+	tlbw
+
+	popm	r0-r3
+	rete
+
+do_fpe_ll:
+	sub	sp, 4
+	stmts	--sp, r0-lr
+	rcall	save_full_context_ex
+	unmask_interrupts
+	mov	r12, 26
+	mov	r11, sp
+	rcall	do_fpe
+	rjmp	ret_from_exception
+
+ret_from_exception:
+	mask_interrupts
+	lddsp	r4, sp[REG_SR]
+	andh	r4, (MODE_MASK >> 16), COH
+	brne	fault_resume_kernel
+
+	get_thread_info r0
+	ld.w	r1, r0[TI_flags]
+	andl	r1, _TIF_WORK_MASK, COH
+	brne	fault_exit_work
+
+fault_resume_user:
+	popm	r8-r9
+	mask_exceptions
+	mtsr	SYSREG_RAR_EX, r8
+	mtsr	SYSREG_RSR_EX, r9
+	ldmts	sp++, r0-lr
+	sub	sp, -4
+	rete
+
+fault_resume_kernel:
+#ifdef CONFIG_PREEMPT
+	get_thread_info	r0
+	ld.w	r2, r0[TI_preempt_count]
+	cp.w	r2, 0
+	brne	1f
+	ld.w	r1, r0[TI_flags]
+	bld	r1, TIF_NEED_RESCHED
+	brcc	1f
+	lddsp	r4, sp[REG_SR]
+	bld	r4, SYSREG_GM_OFFSET
+	brcs	1f
+	rcall	preempt_schedule_irq
+1:
+#endif
+
+	popm	r8-r9
+	mask_exceptions
+	mfsr	r1, SYSREG_SR
+	mtsr	SYSREG_RAR_EX, r8
+	mtsr	SYSREG_RSR_EX, r9
+	popm	lr
+	sub	sp, -4		/* ignore SP */
+	popm	r0-r12
+	sub	sp, -4		/* ignore r12_orig */
+	rete
+
+irq_exit_work:
+	/* Switch to exception mode so that we can share the same code. */
+	mfsr	r8, SYSREG_SR
+	cbr	r8, SYSREG_M0_OFFSET
+	orh	r8, hi(SYSREG_BIT(M1) | SYSREG_BIT(M2))
+	mtsr	SYSREG_SR, r8
+	sub	pc, -2
+	get_thread_info r0
+	ld.w	r1, r0[TI_flags]
+
+fault_exit_work:
+	bld	r1, TIF_NEED_RESCHED
+	brcc	1f
+	unmask_interrupts
+	rcall	schedule
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	fault_exit_work
+
+1:	mov	r2, _TIF_SIGPENDING | _TIF_RESTORE_SIGMASK
+	tst	r1, r2
+	breq	2f
+	unmask_interrupts
+	mov	r12, sp
+	mov	r11, r0
+	rcall	do_notify_resume
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	fault_exit_work
+
+2:	bld	r1, TIF_BREAKPOINT
+	brcc	fault_resume_user
+	mfsr	r3, SYSREG_TLBEHI
+	lddsp	r2, sp[REG_PC]
+	andl	r3, 0xff, COH
+	lsl	r3, 1
+	sbr	r3, 30
+	sbr	r3, 0
+	mtdr	DBGREG_BWA2A, r2
+	mtdr	DBGREG_BWC2A, r3
+	rjmp	fault_resume_user
+
+	/* If we get a debug trap from privileged context we end up here */
+handle_debug_priv:
+	/* Fix up LR and SP in regs. r11 contains the mode we came from */
+	mfsr	r8, SYSREG_SR
+	mov	r9, r8
+	andh	r8, hi(~MODE_MASK)
+	or	r8, r11
+	mtsr	SYSREG_SR, r8
+	sub	pc, -2
+	stdsp	sp[REG_LR], lr
+	mtsr	SYSREG_SR, r9
+	sub	pc, -2
+	sub	r10, sp, -FRAME_SIZE_FULL
+	stdsp	sp[REG_SP], r10
+	mov	r12, sp
+	rcall	do_debug_priv
+
+	/* Now, put everything back */
+	ssrf	SR_EM_BIT
+	popm	r10, r11
+	mtsr	SYSREG_RAR_DBG, r10
+	mtsr	SYSREG_RSR_DBG, r11
+	mfsr	r8, SYSREG_SR
+	mov	r9, r8
+	andh	r8, hi(~MODE_MASK)
+	andh	r11, hi(MODE_MASK)
+	or	r8, r11
+	mtsr	SYSREG_SR, r8
+	sub	pc, -2
+	popm	lr
+	mtsr	SYSREG_SR, r9
+	sub	pc, -2
+	sub	sp, -4		/* skip SP */
+	popm	r0-r12
+	sub	sp, -4
+	retd
+
+	/*
+	 * At this point, everything is masked, that is, interrupts,
+	 * exceptions and debugging traps. We might get called from
+	 * interrupt or exception context in some rare cases, but this
+	 * will be taken care of by do_debug(), so we're not going to
+	 * do a 100% correct context save here.
+	 */
+handle_debug:
+	sub	sp, 4		/* r12_orig */
+	stmts	--sp, r0-lr
+	mfsr	r10, SYSREG_RAR_DBG
+	mfsr	r11, SYSREG_RSR_DBG
+	unmask_exceptions
+	pushm	r10,r11
+	andh	r11, (MODE_MASK >> 16), COH
+	brne	handle_debug_priv
+
+	mov	r12, sp
+	rcall	do_debug
+
+	lddsp	r10, sp[REG_SR]
+	andh	r10, (MODE_MASK >> 16), COH
+	breq	debug_resume_user
+
+debug_restore_all:
+	popm	r10,r11
+	mask_exceptions
+	mtsr	SYSREG_RSR_DBG, r11
+	mtsr	SYSREG_RAR_DBG, r10
+	ldmts	sp++, r0-lr
+	sub	sp, -4
+	retd
+
+debug_resume_user:
+	get_thread_info r0
+	mask_interrupts
+
+	ld.w	r1, r0[TI_flags]
+	andl	r1, _TIF_DBGWORK_MASK, COH
+	breq	debug_restore_all
+
+1:	bld	r1, TIF_NEED_RESCHED
+	brcc	2f
+	unmask_interrupts
+	rcall	schedule
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	1b
+
+2:	mov	r2, _TIF_SIGPENDING | _TIF_RESTORE_SIGMASK
+	tst	r1, r2
+	breq	3f
+	unmask_interrupts
+	mov	r12, sp
+	mov	r11, r0
+	rcall	do_notify_resume
+	mask_interrupts
+	ld.w	r1, r0[TI_flags]
+	rjmp	1b
+
+3:	bld	r1, TIF_SINGLE_STEP
+	brcc	debug_restore_all
+	mfdr	r2, DBGREG_DC
+	sbr	r2, DC_SS_BIT
+	mtdr	DBGREG_DC, r2
+	rjmp	debug_restore_all
+
+	.set	rsr_int0,	SYSREG_RSR_INT0
+	.set	rsr_int1,	SYSREG_RSR_INT1
+	.set	rsr_int2,	SYSREG_RSR_INT2
+	.set	rsr_int3,	SYSREG_RSR_INT3
+	.set	rar_int0,	SYSREG_RAR_INT0
+	.set	rar_int1,	SYSREG_RAR_INT1
+	.set	rar_int2,	SYSREG_RAR_INT2
+	.set	rar_int3,	SYSREG_RAR_INT3
+
+	.macro	IRQ_LEVEL level
+	.type	irq_level\level, @function
+irq_level\level:
+	sub	sp, 4		/* r12_orig */
+	stmts	--sp,r0-lr
+	mfsr	r8, rar_int\level
+	mfsr	r9, rsr_int\level
+	pushm	r8-r9
+
+	mov	r11, sp
+	mov	r12, \level
+
+	rcall	do_IRQ
+
+	lddsp	r4, sp[REG_SR]
+	andh	r4, (MODE_MASK >> 16), COH
+#ifdef CONFIG_PREEMPT
+	brne	2f
+#else
+	brne	1f
+#endif
+
+	get_thread_info	r0
+	ld.w	r1, r0[TI_flags]
+	andl	r1, _TIF_WORK_MASK, COH
+	brne	irq_exit_work
+
+1:	popm	r8-r9
+	mtsr	rar_int\level, r8
+	mtsr	rsr_int\level, r9
+	ldmts	sp++,r0-lr
+	sub	sp, -4		/* ignore r12_orig */
+	rete
+
+#ifdef CONFIG_PREEMPT
+2:
+	get_thread_info	r0
+	ld.w	r2, r0[TI_preempt_count]
+	cp.w	r2, 0
+	brne	1b
+	ld.w	r1, r0[TI_flags]
+	bld	r1, TIF_NEED_RESCHED
+	brcc	1b
+	lddsp	r4, sp[REG_SR]
+	bld	r4, SYSREG_GM_OFFSET
+	brcs	1b
+	rcall	preempt_schedule_irq
+	rjmp	1b
+#endif
+	.endm
+
+	.section .irq.text,"ax",@progbits
+
+	.global	irq_level0
+	.global	irq_level1
+	.global	irq_level2
+	.global	irq_level3
+	IRQ_LEVEL 0
+	IRQ_LEVEL 1
+	IRQ_LEVEL 2
+	IRQ_LEVEL 3

arch/avr32/kernel/head.S

+/*
+ * Non-board-specific low-level startup code
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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/linkage.h>
+
+#include <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/sysreg.h>
+
+	.section .init.text,"ax"
+	.global kernel_entry
+kernel_entry:
+	/* Initialize status register */
+	lddpc   r0, init_sr
+	mtsr	SYSREG_SR, r0
+
+	/* Set initial stack pointer */
+	lddpc   sp, stack_addr
+	sub	sp, -THREAD_SIZE
+
+#ifdef CONFIG_FRAME_POINTER
+	/* Mark last stack frame */
+	mov	lr, 0
+	mov	r7, 0
+#endif
+
+	/* Set up the PIO, SDRAM controller, early printk, etc. */
+	rcall	board_early_init
+
+	/* Start the show */
+	lddpc   pc, kernel_start_addr
+
+	.align  2
+init_sr:
+	.long   0x007f0000	/* Supervisor mode, everything masked */
+stack_addr:
+	.long   init_thread_union
+kernel_start_addr:
+	.long   start_kernel

arch/avr32/kernel/init_task.c

+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/init_task.h>
+#include <linux/mqueue.h>
+
+#include <asm/pgtable.h>
+
+static struct fs_struct init_fs = INIT_FS;
+static struct files_struct init_files = INIT_FILES;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+struct mm_struct init_mm = INIT_MM(init_mm);
+
+EXPORT_SYMBOL(init_mm);
+
+/*
+ * Initial thread structure. Must be aligned on an 8192-byte boundary.
+ */
+union thread_union init_thread_union
+	__attribute__((__section__(".data.init_task"))) =
+		{ INIT_THREAD_INFO(init_task) };
+
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+
+EXPORT_SYMBOL(init_task);