bef7ab0c26
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4024 a1c6a512-1295-4272-9138-f99709370657
159 lines
3.8 KiB
C
159 lines
3.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Alan Korr
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __SYSTEM_H__
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#define __SYSTEM_H__
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#include "sh7034.h"
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#include "config.h"
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#define FREQ CPU_FREQ
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#define BAUDRATE 9600
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#ifndef NULL
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#define NULL ((void*)0)
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#endif
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#ifndef MIN
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#define MIN(a, b) (((a)<(b))?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a, b) (((a)>(b))?(a):(b))
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#endif
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#ifdef LITTLE_ENDIAN
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#define SWAB16(x) (x)
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#define SWAB32(x) (x)
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#endif
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#define nop \
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asm volatile ("nop")
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#define or_b(mask, address) \
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asm \
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("or.b\t%0,@(r0,gbr)" \
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: \
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: /* %0 */ "I"((char)(mask)), \
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/* %1 */ "z"(address-GBR))
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#define and_b(mask, address) \
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asm \
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("and.b\t%0,@(r0,gbr)" \
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: \
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: /* %0 */ "I"((char)(mask)), \
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/* %1 */ "z"(address-GBR))
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#define xor_b(mask, address) \
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asm \
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("xor.b\t%0,@(r0,gbr)" \
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: \
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: /* %0 */ "I"((char)(mask)), \
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/* %1 */ "z"(address-GBR))
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#ifndef SIMULATOR
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static inline short SWAB16(short value)
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/*
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result[15..8] = value[ 7..0];
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result[ 7..0] = value[15..8];
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*/
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{
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short result;
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asm volatile ("swap.b\t%1,%0" : "=r"(result) : "r"(value));
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return result;
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}
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static inline long SWAW32(long value)
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/*
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result[31..16] = value[15.. 0];
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result[15.. 0] = value[31..16];
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*/
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{
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long result;
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asm volatile ("swap.w\t%1,%0" : "=r"(result) : "r"(value));
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return result;
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}
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static inline long SWAB32(long value)
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/*
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result[31..24] = value[ 7.. 0];
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result[23..16] = value[15.. 8];
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result[15.. 8] = value[23..16];
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result[ 7.. 0] = value[31..24];
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*/
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{
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asm volatile ("swap.b\t%0,%0\n"
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"swap.w\t%0,%0\n"
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"swap.b\t%0,%0\n" : "+r"(value));
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return value;
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}
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/* Test And Set - UNTESTED */
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static inline int tas (volatile int *pointer)
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{
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int result;
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asm volatile ("tas.b\t@%1;movt\t%0" : "=t"(result) : "r"((char *)pointer) : "memory");
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return result;
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}
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static inline void sti (void)
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{
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asm volatile ("ldc\t%0,sr" : : "r"(0<<4));
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}
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static inline void cli (void)
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{
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asm volatile ("ldc\t%0,sr" : : "r"(15<<4));
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}
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/* Compare And Swap */
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static inline int cas (volatile int *pointer,int requested_value,int new_value)
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{
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cli();
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if (*pointer == requested_value)
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{
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*pointer = new_value;
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sti ();
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return 1;
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}
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sti ();
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return 0;
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}
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static inline int cas2 (volatile int *pointer1,volatile int *pointer2,int requested_value1,int requested_value2,int new_value1,int new_value2)
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{
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cli();
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if (*pointer1 == requested_value1 && *pointer2 == requested_value2)
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{
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*pointer1 = new_value1;
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*pointer2 = new_value2;
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sti ();
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return 1;
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}
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sti ();
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return 0;
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}
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#endif
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extern void system_reboot (void);
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extern void system_init(void);
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#endif
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