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Diffstat (limited to 'cpukit/score/cpu/powerpc/rtems/score/powerpc.h')
| -rw-r--r-- | cpukit/score/cpu/powerpc/rtems/score/powerpc.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/cpukit/score/cpu/powerpc/rtems/score/powerpc.h b/cpukit/score/cpu/powerpc/rtems/score/powerpc.h new file mode 100644 index 0000000000..93ab3b6499 --- /dev/null +++ b/cpukit/score/cpu/powerpc/rtems/score/powerpc.h @@ -0,0 +1,168 @@ +/** + * @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 */ |