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5f97f7f940
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>
103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_AVR32_ASM_H__
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#define __ASM_AVR32_ASM_H__
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#include <asm/sysreg.h>
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#include <asm/asm-offsets.h>
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#include <asm/thread_info.h>
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#define mask_interrupts ssrf SR_GM_BIT
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#define mask_exceptions ssrf SR_EM_BIT
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#define unmask_interrupts csrf SR_GM_BIT
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#define unmask_exceptions csrf SR_EM_BIT
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#ifdef CONFIG_FRAME_POINTER
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.macro save_fp
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st.w --sp, r7
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.endm
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.macro restore_fp
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ld.w r7, sp++
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.endm
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.macro zero_fp
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mov r7, 0
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.endm
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#else
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.macro save_fp
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.endm
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.macro restore_fp
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.endm
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.macro zero_fp
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.endm
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#endif
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.macro get_thread_info reg
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mov \reg, sp
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andl \reg, ~(THREAD_SIZE - 1) & 0xffff
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.endm
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/* Save and restore registers */
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.macro save_min sr, tmp=lr
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pushm lr
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mfsr \tmp, \sr
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zero_fp
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st.w --sp, \tmp
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.endm
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.macro restore_min sr, tmp=lr
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ld.w \tmp, sp++
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mtsr \sr, \tmp
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popm lr
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.endm
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.macro save_half sr, tmp=lr
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save_fp
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pushm r8-r9,r10,r11,r12,lr
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zero_fp
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mfsr \tmp, \sr
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st.w --sp, \tmp
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.endm
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.macro restore_half sr, tmp=lr
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ld.w \tmp, sp++
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mtsr \sr, \tmp
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popm r8-r9,r10,r11,r12,lr
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restore_fp
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.endm
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.macro save_full_user sr, tmp=lr
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stmts --sp, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
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st.w --sp, lr
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zero_fp
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mfsr \tmp, \sr
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st.w --sp, \tmp
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.endm
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.macro restore_full_user sr, tmp=lr
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ld.w \tmp, sp++
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mtsr \sr, \tmp
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ld.w lr, sp++
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ldmts sp++, r0,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,sp,lr
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.endm
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/* uaccess macros */
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.macro branch_if_kernel scratch, label
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get_thread_info \scratch
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ld.w \scratch, \scratch[TI_flags]
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bld \scratch, TIF_USERSPACE
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brcc \label
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.endm
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.macro ret_if_privileged scratch, addr, size, ret
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sub \scratch, \size, 1
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add \scratch, \addr
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retcs \ret
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retmi \ret
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.endm
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#endif /* __ASM_AVR32_ASM_H__ */
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