mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
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
/*
|
|
* 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__ */
|