[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>

1 files changed, 139 insertions, 0 deletions

diff --git a/arch/avr32/kernel/vmlinux.lds.c b/arch/avr32/kernel/vmlinux.lds.c
new file mode 100644
index 000000000000..cdd627c6b7dc
--- /dev/null
+++ b/arch/avr32/kernel/vmlinux.lds.c
@@ -0,0 +1,139 @@
+/*
+ * AVR32 linker script for the Linux kernel
+ *
+ * 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.
+ */
+#define LOAD_OFFSET 0x00000000
+#include <asm-generic/vmlinux.lds.h>
+
+OUTPUT_FORMAT("elf32-avr32", "elf32-avr32", "elf32-avr32")
+OUTPUT_ARCH(avr32)
+ENTRY(_start)
+
+/* Big endian */
+jiffies = jiffies_64 + 4;
+
+SECTIONS
+{
+        . = CONFIG_ENTRY_ADDRESS;
+        .init           : AT(ADDR(.init) - LOAD_OFFSET) {
+                _stext = .;
+                __init_begin = .;
+                        _sinittext = .;
+                        *(.text.reset)
+                        *(.init.text)
+                        _einittext = .;
+                . = ALIGN(4);
+                __tagtable_begin = .;
+                        *(.taglist)
+                __tagtable_end = .;
+                        *(.init.data)
+                . = ALIGN(16);
+                __setup_start = .;
+                        *(.init.setup)
+                __setup_end = .;
+                . = ALIGN(4);
+                __initcall_start = .;
+                        *(.initcall1.init)
+                        *(.initcall2.init)
+                        *(.initcall3.init)
+                        *(.initcall4.init)
+                        *(.initcall5.init)
+                        *(.initcall6.init)
+                        *(.initcall7.init)
+                __initcall_end = .;
+                __con_initcall_start = .;
+                        *(.con_initcall.init)
+                __con_initcall_end = .;
+                __security_initcall_start = .;
+                        *(.security_initcall.init)
+                __security_initcall_end = .;
+                . = ALIGN(32);
+                __initramfs_start = .;
+                        *(.init.ramfs)
+                __initramfs_end = .;
+                . = ALIGN(4096);
+                __init_end = .;
+        }
+
+        . = ALIGN(8192);
+        .text           : AT(ADDR(.text) - LOAD_OFFSET) {
+                _evba = .;
+                _text = .;
+                *(.ex.text)
+                . = 0x50;
+                *(.tlbx.ex.text)
+                . = 0x60;
+                *(.tlbr.ex.text)
+                . = 0x70;
+                *(.tlbw.ex.text)
+                . = 0x100;
+                *(.scall.text)
+                *(.irq.text)
+                *(.text)
+                SCHED_TEXT
+                LOCK_TEXT
+                KPROBES_TEXT
+                *(.fixup)
+                *(.gnu.warning)
+                _etext = .;
+        } = 0xd703d703
+
+        . = ALIGN(4);
+        __ex_table      : AT(ADDR(__ex_table) - LOAD_OFFSET) {
+                __start___ex_table = .;
+                *(__ex_table)
+                __stop___ex_table = .;
+        }
+
+        RODATA
+
+        . = ALIGN(8192);
+
+        .data           : AT(ADDR(.data) - LOAD_OFFSET) {
+                _data = .;
+                _sdata = .;
+                /*
+                 * First, the init task union, aligned to an 8K boundary.
+                 */
+                *(.data.init_task)
+
+                /* Then, the cacheline aligned data */
+                . = ALIGN(32);
+                *(.data.cacheline_aligned)
+
+                /* And the rest... */
+                *(.data.rel*)
+                *(.data)
+                CONSTRUCTORS
+
+                _edata = .;
+        }
+
+
+        . = ALIGN(8);
+        .bss            : AT(ADDR(.bss) - LOAD_OFFSET) {
+                __bss_start = .;
+                *(.bss)
+                *(COMMON)
+                . = ALIGN(8);
+                __bss_stop = .;
+                _end = .;
+        }
+
+        /* When something in the kernel is NOT compiled as a module, the module
+         * cleanup code and data are put into these segments. Both can then be
+         * thrown away, as cleanup code is never called unless it's a module.
+         */
+        /DISCARD/               : {
+                *(.exit.text)
+                *(.exit.data)
+                *(.exitcall.exit)
+        }
+
+        DWARF_DEBUG
+}