linux/include/asm-avr32/asm.h
Haavard Skinnemoen 5f97f7f940 [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>
2006-09-26 08:48:54 -07:00

103 lines
1.9 KiB
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.
*/
#ifndef __ASM_AVR32_ASM_H__
#define __ASM_AVR32_ASM_H__
#include <asm/sysreg.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#define mask_interrupts ssrf SR_GM_BIT
#define mask_exceptions ssrf SR_EM_BIT
#define unmask_interrupts csrf SR_GM_BIT
#define unmask_exceptions csrf SR_EM_BIT
#ifdef CONFIG_FRAME_POINTER
.macro save_fp
st.w --sp, r7
.endm
.macro restore_fp
ld.w r7, sp++
.endm
.macro zero_fp
mov r7, 0
.endm
#else
.macro save_fp
.endm
.macro restore_fp
.endm
.macro zero_fp
.endm
#endif
.macro get_thread_info reg
mov \reg, sp
andl \reg, ~(THREAD_SIZE - 1) & 0xffff
.endm
/* Save and restore registers */
.macro save_min sr, tmp=lr
pushm lr
mfsr \tmp, \sr
zero_fp
st.w --sp, \tmp
.endm
.macro restore_min sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
popm lr
.endm
.macro save_half sr, tmp=lr
save_fp
pushm r8-r9,r10,r11,r12,lr
zero_fp
mfsr \tmp, \sr
st.w --sp, \tmp
.endm
.macro restore_half sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
popm r8-r9,r10,r11,r12,lr
restore_fp
.endm
.macro save_full_user sr, tmp=lr
stmts --sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
st.w --sp, lr
zero_fp
mfsr \tmp, \sr
st.w --sp, \tmp
.endm
.macro restore_full_user sr, tmp=lr
ld.w \tmp, sp++
mtsr \sr, \tmp
ld.w lr, sp++
ldmts sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
.endm
/* uaccess macros */
.macro branch_if_kernel scratch, label
get_thread_info \scratch
ld.w \scratch, \scratch[TI_flags]
bld \scratch, TIF_USERSPACE
brcc \label
.endm
.macro ret_if_privileged scratch, addr, size, ret
sub \scratch, \size, 1
add \scratch, \addr
retcs \ret
retmi \ret
.endm
#endif /* __ASM_AVR32_ASM_H__ */