linux/arch/avr32/mm/copy_page.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.
 */
#include <linux/linkage.h>
#include <asm/page.h>

/*
 * copy_page
 *
 * r12		to (P1 address)
 * r11		from (P1 address)
 * r8-r10	scratch
 */
	.text
	.global copy_page
copy_page:
	sub	r10, r11, -(1 << PAGE_SHIFT)
	/* pref	r11[0] */
1:	/* pref	r11[8] */
	ld.d	r8, r11++
	st.d	r12++, r8
	cp	r11, r10
	brlo	1b
	mov	pc, lr
[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 14:32:13 +08:00			`/*`
			`* 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>`

			`/*`
			`* copy_page`
			`*`
			`* r12 to (P1 address)`
			`* r11 from (P1 address)`
			`* r8-r10 scratch`
			`*/`
			`.text`
			`.global copy_page`
			`copy_page:`
			`sub r10, r11, -(1 << PAGE_SHIFT)`
			`/* pref r11[0] */`
			`1: /* pref r11[8] */`
			`ld.d r8, r11++`
			`st.d r12++, r8`
			`cp r11, r10`
			`brlo 1b`
			`mov pc, lr`