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/**
* @file rtems/score/powerpc.h
*/
/*
* This file contains definitions for the IBM/Motorola PowerPC
* family members.
*
* Author: Andrew Bray <andy@i-cubed.co.uk>
*
* COPYRIGHT (c) 1995 by i-cubed ltd.
*
* MPC860 support code was added by Jay Monkman <jmonkman@frasca.com>
* MPC8260 support added by Andy Dachs <a.dachs@sstl.co.uk>
* Surrey Satellite Technology Limited
*
* To anyone who acknowledges that this file is provided "AS IS"
* without any express or implied warranty:
* permission to use, copy, modify, and distribute this file
* for any purpose is hereby granted without fee, provided that
* the above copyright notice and this notice appears in all
* copies, and that the name of i-cubed limited not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* i-cubed limited makes no representations about the suitability
* of this software for any purpose.
*
* Derived from c/src/exec/cpu/no_cpu/no_cpu.h:
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
*
* Note:
* This file is included by both C and assembler code ( -DASM )
*
* $Id$
*/
#ifndef _RTEMS_SCORE_POWERPC_H
#define _RTEMS_SCORE_POWERPC_H
#ifdef __cplusplus
extern "C" {
#endif
#include <rtems/score/types.h>
/*
* Define the name of the CPU family.
*/
#define CPU_NAME "PowerPC"
/*
* This file contains the information required to build
* RTEMS for the PowerPC family.
*/
/* Generic ppc */
#ifdef _SOFT_FLOAT
#define CPU_MODEL_NAME "Generic (no FPU)"
#elif defined(__NO_FPRS__) || defined(__SPE__)
#define CPU_MODEL_NAME "Generic (E500/float-gprs/SPE)"
#else
#define CPU_MODEL_NAME "Generic (classic FPU)"
#endif
#define PPC_ALIGNMENT 8
#define PPC_STRUCTURE_ALIGNMENT 32
/*
* Application binary interfaces.
*
* PPC_ABI MUST be defined as one of these.
* Only big endian is currently supported.
*/
/*
* SVR4 ABI
*/
#define PPC_ABI_SVR4 2
/*
* Embedded ABI
*/
#define PPC_ABI_EABI 3
/*
* Default to the EABI used by current GNU tools
*/
#ifndef PPC_ABI
#define PPC_ABI PPC_ABI_EABI
#endif
#if (PPC_ABI == PPC_ABI_SVR4) || defined(__ALTIVEC__)
#define PPC_STACK_ALIGNMENT 16
#elif (PPC_ABI == PPC_ABI_EABI)
#if 1
/* Till.S: 2008/07/10; AFAIK, the CPU_STACK_ALIGNMENT is only
* used to align the top of the stack. We don't lose much
* if we always align TOS to 16-bytes but we then are always
* OK, even if the user tells the compiler to generate 16-byte
* alignment.
*/
#define PPC_STACK_ALIGNMENT 16
#else
#define PPC_STACK_ALIGNMENT 8
#endif
#else
#error "PPC_ABI is not properly defined"
#endif
/*
* Assume PPC_HAS_FPU to be a synonym for _SOFT_FLOAT.
*/
#if defined(_SOFT_FLOAT) || defined(__NO_FPRS__) /* e500 has unified integer/FP registers */
#define PPC_HAS_FPU 0
#else
#define PPC_HAS_FPU 1
#endif
/*
* Unless specified above, If the model has FP support, it is assumed to
* support doubles (8-byte floating point numbers).
*
* If the model does NOT have FP support, then the model does
* NOT have double length FP registers.
*/
#if (PPC_HAS_FPU)
#define PPC_HAS_DOUBLE 1
#else
#define PPC_HAS_DOUBLE 0
#endif
/*
* Assemblers.
* PPC_ASM MUST be defined as one of these.
*
* PPC_ASM_ELF: ELF assembler. Currently used for all ABIs.
*
* NOTE: Only PPC_ABI_ELF is currently fully supported.
*
* Also NOTE: cpukit doesn't need this but asm.h which is defined
* in cpukit for consistency with other ports does.
*/
#define PPC_ASM_ELF 0
/*
* Default to the assembler format used by the current GNU tools.
*/
#define PPC_ASM PPC_ASM_ELF
#ifdef __cplusplus
}
#endif
#endif /* _RTEMS_SCORE_POWERPC_H */
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