From 5f97f7f9400de47ae837170bb274e90ad3934386 Mon Sep 17 00:00:00 2001 From: Haavard Skinnemoen Date: Mon, 25 Sep 2006 23:32:13 -0700 Subject: [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 Signed-off-by: Adrian Bunk Signed-off-by: Dave McCracken Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/avr32/lib/csum_partial_copy_generic.S | 99 ++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 arch/avr32/lib/csum_partial_copy_generic.S (limited to 'arch/avr32/lib/csum_partial_copy_generic.S') diff --git a/arch/avr32/lib/csum_partial_copy_generic.S b/arch/avr32/lib/csum_partial_copy_generic.S new file mode 100644 index 000000000000..a3a0f9b8929c --- /dev/null +++ b/arch/avr32/lib/csum_partial_copy_generic.S @@ -0,0 +1,99 @@ +/* + * 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 +#include + + /* + * unsigned int csum_partial_copy_generic(const char *src, char *dst, int len + * int sum, int *src_err_ptr, + * int *dst_err_ptr) + * + * Copy src to dst while checksumming, otherwise like csum_partial. + */ + + .macro ld_src size, reg, ptr +9999: ld.\size \reg, \ptr + .section __ex_table, "a" + .long 9999b, fixup_ld_src + .previous + .endm + + .macro st_dst size, ptr, reg +9999: st.\size \ptr, \reg + .section __ex_table, "a" + .long 9999b, fixup_st_dst + .previous + .endm + + .text + .global csum_partial_copy_generic + .type csum_partial_copy_generic,"function" + .align 1 +csum_partial_copy_generic: + pushm r4-r7,lr + + /* The inner loop */ +1: sub r10, 4 + brlt 5f +2: ld_src w, r5, r12++ + st_dst w, r11++, r5 + add r9, r5 + acr r9 + sub r10, 4 + brge 2b + + /* return if we had a whole number of words */ +5: sub r10, -4 + brne 7f + +6: mov r12, r9 + popm r4-r7,pc + + /* handle additional bytes at the tail */ +7: mov r5, 0 + mov r4, 32 +8: ld_src ub, r6, r12++ + st_dst b, r11++, r6 + lsl r5, 8 + sub r4, 8 + bfins r5, r6, 0, 8 + sub r10, 1 + brne 8b + + lsl r5, r5, r4 + add r9, r5 + acr r9 + rjmp 6b + + /* Exception handler */ + .section .fixup,"ax" + .align 1 +fixup_ld_src: + mov r9, -EFAULT + cp.w r8, 0 + breq 1f + st.w r8[0], r9 + +1: /* + * TODO: zero the complete destination - computing the rest + * is too much work + */ + + mov r9, 0 + rjmp 6b + +fixup_st_dst: + mov r9, -EFAULT + lddsp r8, sp[20] + cp.w r8, 0 + breq 1f + st.w r8[0], r9 +1: mov r9, 0 + rjmp 6b + + .previous -- cgit v1.2.1