[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, 102 insertions, 0 deletions

diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
new file mode 100644
index 000000000000..7589a9b426cb
--- /dev/null
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -0,0 +1,102 @@
+/*
+ * 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.
+ */
+
+/*
+ * Stubs for syscalls that require access to pt_regs or that take more
+ * than five parameters.
+ */
+
+#define ARG6    r3
+
+        .text
+        .global __sys_rt_sigsuspend
+        .type   __sys_rt_sigsuspend,@function
+__sys_rt_sigsuspend:
+        mov     r10, sp
+        rjmp    sys_rt_sigsuspend
+
+        .global __sys_sigaltstack
+        .type   __sys_sigaltstack,@function
+__sys_sigaltstack:
+        mov     r10, sp
+        rjmp    sys_sigaltstack
+
+        .global __sys_rt_sigreturn
+        .type   __sys_rt_sigreturn,@function
+__sys_rt_sigreturn:
+        mov     r12, sp
+        rjmp    sys_rt_sigreturn
+
+        .global __sys_fork
+        .type   __sys_fork,@function
+__sys_fork:
+        mov     r12, sp
+        rjmp    sys_fork
+
+        .global __sys_clone
+        .type   __sys_clone,@function
+__sys_clone:
+        mov     r8, sp
+        rjmp    sys_clone
+
+        .global __sys_vfork
+        .type   __sys_vfork,@function
+__sys_vfork:
+        mov     r12, sp
+        rjmp    sys_vfork
+
+        .global __sys_execve
+        .type   __sys_execve,@function
+__sys_execve:
+        mov     r9, sp
+        rjmp    sys_execve
+
+        .global __sys_mmap2
+        .type   __sys_mmap2,@function
+__sys_mmap2:
+        pushm   lr
+        st.w    --sp, ARG6
+        rcall   sys_mmap2
+        sub     sp, -4
+        popm    pc
+
+        .global __sys_sendto
+        .type   __sys_sendto,@function
+__sys_sendto:
+        pushm   lr
+        st.w    --sp, ARG6
+        rcall   sys_sendto
+        sub     sp, -4
+        popm    pc
+
+        .global __sys_recvfrom
+        .type   __sys_recvfrom,@function
+__sys_recvfrom:
+        pushm   lr
+        st.w    --sp, ARG6
+        rcall   sys_recvfrom
+        sub     sp, -4
+        popm    pc
+
+        .global __sys_pselect6
+        .type   __sys_pselect6,@function
+__sys_pselect6:
+        pushm   lr
+        st.w    --sp, ARG6
+        rcall   sys_pselect6
+        sub     sp, -4
+        popm    pc
+
+        .global __sys_splice
+        .type   __sys_splice,@function
+__sys_splice:
+        pushm   lr
+        st.w    --sp, ARG6
+        rcall   sys_splice
+        sub     sp, -4
+        popm    pc