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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2006-09-26 02:32:13 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:48:54 -0400
commit5f97f7f9400de47ae837170bb274e90ad3934386 (patch)
tree514451e6dc6b46253293a00035d375e77b1c65ed /include/asm-avr32/unaligned.h
parent53e62d3aaa60590d4a69b4e07c29f448b5151047 (diff)
[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>
Diffstat (limited to 'include/asm-avr32/unaligned.h')
-rw-r--r--include/asm-avr32/unaligned.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/include/asm-avr32/unaligned.h b/include/asm-avr32/unaligned.h
new file mode 100644
index 000000000000..3042723fcbfd
--- /dev/null
+++ b/include/asm-avr32/unaligned.h
@@ -0,0 +1,25 @@
1#ifndef __ASM_AVR32_UNALIGNED_H
2#define __ASM_AVR32_UNALIGNED_H
3
4/*
5 * AVR32 can handle some unaligned accesses, depending on the
6 * implementation. The AVR32 AP implementation can handle unaligned
7 * words, but halfwords must be halfword-aligned, and doublewords must
8 * be word-aligned.
9 *
10 * TODO: Make all this CPU-specific and optimize.
11 */
12
13#include <linux/string.h>
14
15/* Use memmove here, so gcc does not insert a __builtin_memcpy. */
16
17#define get_unaligned(ptr) \
18 ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
19
20#define put_unaligned(val, ptr) \
21 ({ __typeof__(*(ptr)) __tmp = (val); \
22 memmove((ptr), &__tmp, sizeof(*(ptr))); \
23 (void)0; })
24
25#endif /* __ASM_AVR32_UNALIGNED_H */