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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [common/] [v2_0/] [include/] [hal_endian.h] - Rev 379
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#ifndef CYGONCE_HAL_HAL_ENDIAN_H #define CYGONCE_HAL_HAL_ENDIAN_H //============================================================================= // // hal_endian.h // // Endian conversion macros // //============================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //============================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): jskov // Contributors:jskov // Date: 2001-10-04 // Purpose: Endian conversion macros // Usage: #include <cyg/hal/hal_endian.h> // //####DESCRIPTIONEND#### // //============================================================================= #include <pkgconf/hal.h> // CYGBLD_HAL_ENDIAN_H #include <cyg/infra/cyg_type.h> // endian setting // Allow HALs to override the generic implementation of swap macros #ifdef CYGBLD_HAL_ENDIAN_H # include CYGBLD_HAL_ENDIAN_H #endif #ifndef CYG_SWAP16 # define CYG_SWAP16(_x_) \ ({ cyg_uint16 _x = (_x_); ((_x << 8) | (_x >> 8)); }) #endif #ifndef CYG_SWAP32 # define CYG_SWAP32(_x_) \ ({ cyg_uint32 _x = (_x_); \ ((_x << 24) | \ ((0x0000FF00UL & _x) << 8) | \ ((0x00FF0000UL & _x) >> 8) | \ (_x >> 24)); }) #endif #if (CYG_BYTEORDER == CYG_LSBFIRST) # define CYG_CPU_TO_BE16(_x_) CYG_SWAP16((_x_)) # define CYG_CPU_TO_BE32(_x_) CYG_SWAP32((_x_)) # define CYG_BE16_TO_CPU(_x_) CYG_SWAP16((_x_)) # define CYG_BE32_TO_CPU(_x_) CYG_SWAP32((_x_)) # define CYG_CPU_TO_LE16(_x_) (_x_) # define CYG_CPU_TO_LE32(_x_) (_x_) # define CYG_LE16_TO_CPU(_x_) (_x_) # define CYG_LE32_TO_CPU(_x_) (_x_) #elif (CYG_BYTEORDER == CYG_MSBFIRST) # define CYG_CPU_TO_BE16(_x_) (_x_) # define CYG_CPU_TO_BE32(_x_) (_x_) # define CYG_BE16_TO_CPU(_x_) (_x_) # define CYG_BE32_TO_CPU(_x_) (_x_) # define CYG_CPU_TO_LE16(_x_) CYG_SWAP16((_x_)) # define CYG_CPU_TO_LE32(_x_) CYG_SWAP32((_x_)) # define CYG_LE16_TO_CPU(_x_) CYG_SWAP16((_x_)) # define CYG_LE32_TO_CPU(_x_) CYG_SWAP32((_x_)) #else # error "Endian mode not selected" #endif //----------------------------------------------------------------------------- #endif // CYGONCE_HAL_HAL_ENDIAN_H // End of hal_endian.h
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