ppc.h

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*  ppc.h
 *
 *  This file contains definitions for the IBM/Motorola PowerPC
 *  family members.
 *
 *  Author:	Andrew Bray <[e-mail]>
 *
 *  COPYRIGHT (c) 1995 by i-cubed ltd.
 *
 *  MPC860 support code was added by Jay Monkman <[e-mail]>
 *  MPC8260 support added by Andy Dachs <[e-mail]>
 *  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: ppc.h,v 1.15.2.1 2003/09/04 18:47:36 joel Exp $
 */


#ifndef _INCLUDE_PPC_h
#define _INCLUDE_PPC_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 a particular member of the PowerPC family.  It does
 *  this by setting variables to indicate which implementation
 *  dependent features are present in a particular member
 *  of the family.
 *
 *  The following architectural feature definitions are defaulted
 *  unless specifically set by the model definition:
 *
 *    + PPC_INTERRUPT_MAX        - 16
 *    + PPC_CACHE_ALIGNMENT      - 32
 *    + PPC_LOW_POWER_MODE       - PPC_LOW_POWER_MODE_NONE
 *    + PPC_HAS_EXCEPTION_PREFIX - 1
 *    + PPC_HAS_FPU              - 1
 *    + PPC_HAS_DOUBLE           - 1 if PPC_HAS_FPU, 
 *                               - 0 otherwise
 *    + PPC_USE_MULTIPLE         - 0
 */
 
/*
 *  Define the low power mode models
 *
 *  Standard:   as defined for 603e
 *  Nap Mode:   nap mode only (604)
 *  XXX 403GB, 603, 603e, 604, 821
 */

#define PPC_LOW_POWER_MODE_NONE      0
#define PPC_LOW_POWER_MODE_STANDARD  1

/*
 *  Figure out all CPU Model Feature Flags based upon compiler
 *  predefines.
 */

#if defined(ppc403) || defined(ppc405)
/*
 *  IBM 403
 *
 *  Developed for 403GA.  Book checked for 403GB.
 *
 *  Does not have user mode.
 */
 
#if defined(ppc403)
#define CPU_MODEL_NAME "PowerPC 403"
#elif defined (ppc405)
#define CPU_MODEL_NAME "PowerPC 405"
#endif
#define PPC_ALIGNMENT		4  
#define PPC_CACHE_ALIGNMENT	16
#define PPC_HAS_RFCI    	1
#define PPC_HAS_FPU     	0
#define PPC_USE_MULTIPLE	1
#define PPC_I_CACHE		2048
#define PPC_D_CACHE		1024

#define PPC_HAS_EXCEPTION_PREFIX 0
#define PPC_HAS_EVPR             1

#elif defined(mpc555)

#define CPU_MODEL_NAME  "PowerPC 555"

/* Copied from mpc505 */
#define PPC_ALIGNMENT		4
#define PPC_CACHE_ALIGNMENT	16

/* Based on comments by Sergei Organov <[e-mail]> */
#define PPC_I_CACHE        	0 
#define PPC_D_CACHE        	0 

#elif defined(mpc505) || defined(mpc509)
/*
 *  Submitted by Sergei Organov <[e-mail]> as a patch against
 *  3.6.0 long after 4.0 was released.   This is just an attempt
 *  to get the setting correct.
 */

#define CPU_MODEL_NAME  "PowerPC 505/509"

#define PPC_ALIGNMENT           4
#define PPC_CACHE_ALIGNMENT     16
#define PPC_I_CACHE             4096
#define PPC_D_CACHE             0


#elif defined(ppc601)

/*
 *  Submitted with original port -- book checked only.
 */
 
#define CPU_MODEL_NAME  "PowerPC 601"

#define PPC_ALIGNMENT		8
#define PPC_USE_MULTIPLE	1
#define PPC_I_CACHE		0
#define PPC_D_CACHE		32768

#elif defined(ppc602)
/*
 *  Submitted with original port -- book checked only.
 */
 
#define CPU_MODEL_NAME  "PowerPC 602"

#define PPC_ALIGNMENT		4
#define PPC_HAS_DOUBLE		0
#define PPC_I_CACHE		4096
#define PPC_D_CACHE		4096

#elif defined(ppc603)
/*
 *  Submitted with original port -- book checked only.
 */
 
#define CPU_MODEL_NAME  "PowerPC 603"

#define PPC_ALIGNMENT		8
#define PPC_I_CACHE		8192
#define PPC_D_CACHE		8192

#elif defined(ppc603e)
 
#define CPU_MODEL_NAME  "PowerPC 603e"
/*
 *  Submitted with original port.
 *
 *  Known to work on real hardware.
 */

#define PPC_ALIGNMENT		8
#define PPC_I_CACHE		16384
#define PPC_D_CACHE		16384

#define PPC_LOW_POWER_MODE PPC_LOW_POWER_MODE_STANDARD

#elif defined(mpc604)
/*
 *  Submitted with original port -- book checked only.
 */
 
#define CPU_MODEL_NAME  "PowerPC 604"

#define PPC_ALIGNMENT		8
#define PPC_I_CACHE		16384
#define PPC_D_CACHE		16384
 
#elif defined(mpc860)
/* 
 *  Added by Jay Monkman ([e-mail]) 6/28/98 
 *  with some changes by Darlene Stewart ([e-mail])
 */ 
#define CPU_MODEL_NAME  "PowerPC MPC860"

#define PPC_ALIGNMENT		4
#define PPC_I_CACHE             4096
#define PPC_D_CACHE             4096
#define PPC_CACHE_ALIGNMENT	16
#define PPC_INTERRUPT_MAX       71
#define PPC_HAS_FPU     	0
#define PPC_HAS_DOUBLE		0
#define PPC_USE_MULTIPLE	1

#define PPC_MSR_0		0x00009000
#define PPC_MSR_1		0x00001000
#define PPC_MSR_2		0x00001000
#define PPC_MSR_3		0x00000000

#elif defined(mpc821)
/* 
 *  Added by Andrew Bray <[e-mail]> 6/April/1999
 */ 
#define CPU_MODEL_NAME  "PowerPC MPC821"

#define PPC_ALIGNMENT		4
#define PPC_I_CACHE             4096
#define PPC_D_CACHE             4096
#define PPC_CACHE_ALIGNMENT	16
#define PPC_INTERRUPT_MAX       71
#define PPC_HAS_FPU     	0
#define PPC_HAS_DOUBLE		0

#define PPC_MSR_0		0x00009000
#define PPC_MSR_1		0x00001000
#define PPC_MSR_2		0x00001000
#define PPC_MSR_3		0x00000000

#elif defined(mpc750)

#define CPU_MODEL_NAME  "PowerPC 750"

#define PPC_ALIGNMENT		8
#define PPC_I_CACHE		16384
#define PPC_D_CACHE		16384

#elif defined(mpc7400)

#define CPU_MODEL_NAME  "PowerPC 7400"

#define PPC_ALIGNMENT		8
#define PPC_I_CACHE		32768
#define PPC_D_CACHE		32768

#elif defined(mpc8260)
/*
 *  Added by Andy Dachs <[e-mail]> 23/11/2000
 */
#define CPU_MODEL_NAME  "PowerPC MPC8260"

#define PPC_ALIGNMENT		4
#define PPC_I_CACHE         	16384
#define PPC_D_CACHE         	16384
#define PPC_CACHE_ALIGNMENT	32
#define PPC_INTERRUPT_MAX       125
/*#define PPC_HAS_FPU     	0 */ 	/* my 8260 is one the few with no FPU */
#define PPC_HAS_FPU		1	/* the rest do have one */
#define PPC_HAS_DOUBLE		1
#define PPC_USE_MULTIPLE	1
#else
 
#error "Unsupported CPU Model"
 
#endif

/*
 *  Application binary interfaces.
 *
 *  PPC_ABI MUST be defined as one of these.
 *  Only PPC_ABI_POWEROPEN is currently fully supported.
 *  Only EABI will be supported in the end when
 *  the tools are there.
 *  Only big endian is currently supported.
 */
/*
 *  PowerOpen ABI.  This is Andy's hack of the
 *  PowerOpen ABI to ELF.  ELF rather than a
 *  XCOFF assembler is used.  This may work
 *  if PPC_ASM == PPC_ASM_XCOFF is defined.
 */
#define PPC_ABI_POWEROPEN	0
/*
 *  GCC 2.7.0 munched version of EABI, with
 *  PowerOpen calling convention and stack frames,
 *  but EABI style indirect function calls.
 */
#define PPC_ABI_GCC27		1
/*
 *  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_POWEROPEN)
#define PPC_STACK_ALIGNMENT	8
#elif (PPC_ABI == PPC_ABI_GCC27)
#define PPC_STACK_ALIGNMENT	8
#elif (PPC_ABI == PPC_ABI_SVR4)
#define PPC_STACK_ALIGNMENT	16
#elif (PPC_ABI == PPC_ABI_EABI)
#define PPC_STACK_ALIGNMENT	8
#else
#error  "PPC_ABI is not properly defined"
#endif
#ifndef PPC_ABI
#error  "PPC_ABI is not properly defined"
#endif

/*
 *  Assemblers.
 *  PPC_ASM MUST be defined as one of these.
 *
 *  PPC_ASM_ELF:   ELF assembler. Currently used for all ABIs.
 *  PPC_ASM_XCOFF: XCOFF assembler. May be needed for PowerOpen ABI.
 *
 *  NOTE: Only PPC_ABI_ELF is currently fully supported.
 */

#define PPC_ASM_ELF   0
#define PPC_ASM_XCOFF 1

/*
 *  Default to the assembler format used by the current GNU tools.
 */

#ifndef PPC_ASM
#define PPC_ASM PPC_ASM_ELF
#endif

/*
 *  If the maximum number of exception sources has not been defined,
 *  then default it to 16.
 */

#ifndef PPC_INTERRUPT_MAX
#define PPC_INTERRUPT_MAX	16
#endif