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/****************************************************************************
* arch/mips/include/mips32/registers.h
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __ARCH_MIPS_INCLUDE_MIPS32_REGISTERS_H
#define __ARCH_MIPS_INCLUDE_MIPS32_REGISTERS_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Standard synonmyms for MIPS registers */
#ifdef __ASSEMBLY__
/* Zero register: Always returns 0 */
#define zero $0
/* Assembler temporary register: Reserved for use by the assembler */
#define at_reg $1
/* Return value registers: Value returned by function */
#define v0 $2
#define v1 $3
/* Argument registers: First four parameters to a function */
#define a0 $4
#define a1 $5
#define a2 $6
#define a3 $7
/* Volatile registers: Registers that can be used without saving */
#define t0 $8
#define t1 $9
#define t2 $10
#define t3 $11
#define t4 $12
#define t5 $13
#define t6 $14
#define t7 $15
#define t8 $24
#define t9 $25
/* Static registers: Registers that must be saved and restored if used */
#define s0 $16
#define s1 $17
#define s2 $18
#define s3 $19
#define s4 $20
#define s5 $21
#define s6 $22
#define s7 $23
/* Reserved for use by interrupt/trap handling logic */
#define k0 $26
#define k1 $27
/* Global pointer register */
#define gp $28
/* Stack pointer register: Stack pointer */
#define sp $29
/* Register 30 may be either an additional static register or a frame pointer */
#define s8 $30
#define fp $30
/* Return address register: Contains the function return address */
#define ra $31
#endif
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif /* __ARCH_MIPS_INCLUDE_MIPS32_REGISTERS_H */
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