/** * @file * Support for different processor and compiler architectures */ /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels * */ #ifndef LWIP_HDR_ARCH_H #define LWIP_HDR_ARCH_H #ifndef LITTLE_ENDIAN #define LITTLE_ENDIAN 1234 #endif #ifndef BIG_ENDIAN #define BIG_ENDIAN 4321 #endif #include "arch/cc.h" /** Define this to 1 in arch/cc.h of your port if your compiler does not provide * the stdint.h header. This cannot be \#defined in lwipopts.h since * this is not an option of lwIP itself, but an option of the lwIP port * to your system. * Additionally, this header is meant to be \#included in lwipopts.h * (you may need to declare function prototypes in there). */ #ifndef LWIP_NO_STDINT_H #define LWIP_NO_STDINT_H 0 #endif /* Define generic types used in lwIP */ #if !LWIP_NO_STDINT_H #include typedef uint8_t u8_t; typedef int8_t s8_t; typedef uint16_t u16_t; typedef int16_t s16_t; typedef uint32_t u32_t; typedef int32_t s32_t; typedef uintptr_t mem_ptr_t; #endif /** Define this to 1 in arch/cc.h of your port if your compiler does not provide * the inttypes.h header. This cannot be \#defined in lwipopts.h since * this is not an option of lwIP itself, but an option of the lwIP port * to your system. * Additionally, this header is meant to be \#included in lwipopts.h * (you may need to declare function prototypes in there). */ #ifndef LWIP_NO_INTTYPES_H #define LWIP_NO_INTTYPES_H 0 #endif /* Define (sn)printf formatters for these lwIP types */ #if !LWIP_NO_INTTYPES_H #include #ifndef X8_F #define X8_F "02" PRIx8 #endif #ifndef U16_F #define U16_F PRIu16 #endif #ifndef S16_F #define S16_F PRId16 #endif #ifndef X16_F #define X16_F PRIx16 #endif #ifndef U32_F #define U32_F PRIu32 #endif #ifndef S32_F #define S32_F PRId32 #endif #ifndef X32_F #define X32_F PRIx32 #endif #ifndef SZT_F #define SZT_F PRIuPTR #endif #endif /** Allocates a memory buffer of specified size that is of sufficient size to align * its start address using LWIP_MEM_ALIGN. * You can declare your own version here e.g. to enforce alignment without adding * trailing padding bytes (see LWIP_MEM_ALIGN_BUFFER) or your own section placement * requirements. * e.g. if you use gcc and need 32 bit alignment: * \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[size] __attribute__((aligned(4))) * or more portable: * \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u32_t variable_name[(size + sizeof(u32_t) - 1) / sizeof(u32_t)] */ #ifndef LWIP_DECLARE_MEMORY_ALIGNED #define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[LWIP_MEM_ALIGN_BUFFER(size)] #endif /** Calculate memory size for an aligned buffer - returns the next highest * multiple of MEM_ALIGNMENT (e.g. LWIP_MEM_ALIGN_SIZE(3) and * LWIP_MEM_ALIGN_SIZE(4) will both yield 4 for MEM_ALIGNMENT == 4). */ #ifndef LWIP_MEM_ALIGN_SIZE #define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1U) & ~(MEM_ALIGNMENT-1U)) #endif /** Calculate safe memory size for an aligned buffer when using an unaligned * type as storage. This includes a safety-margin on (MEM_ALIGNMENT - 1) at the * start (e.g. if buffer is u8_t[] and actual data will be u32_t*) */ #ifndef LWIP_MEM_ALIGN_BUFFER #define LWIP_MEM_ALIGN_BUFFER(size) (((size) + MEM_ALIGNMENT - 1U)) #endif /** Align a memory pointer to the alignment defined by MEM_ALIGNMENT * so that ADDR % MEM_ALIGNMENT == 0 */ #ifndef LWIP_MEM_ALIGN #define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1))) #endif #ifdef __cplusplus extern "C" { #endif #ifndef PACK_STRUCT_BEGIN #define PACK_STRUCT_BEGIN #endif /* PACK_STRUCT_BEGIN */ #ifndef PACK_STRUCT_END #define PACK_STRUCT_END #endif /* PACK_STRUCT_END */ #ifndef PACK_STRUCT_STRUCT #define PACK_STRUCT_STRUCT #endif /* PACK_STRUCT_STRUCT */ #ifndef PACK_STRUCT_FIELD #define PACK_STRUCT_FIELD(x) x #endif /* PACK_STRUCT_FIELD */ /* Used for struct fields of u8_t, * where some compilers warn that packing is not necessary */ #ifndef PACK_STRUCT_FLD_8 #define PACK_STRUCT_FLD_8(x) PACK_STRUCT_FIELD(x) #endif /* PACK_STRUCT_FLD_8 */ /* Used for struct fields of that are packed structs themself, * where some compilers warn that packing is not necessary */ #ifndef PACK_STRUCT_FLD_S #define PACK_STRUCT_FLD_S(x) PACK_STRUCT_FIELD(x) #endif /* PACK_STRUCT_FLD_S */ #ifndef LWIP_UNUSED_ARG #define LWIP_UNUSED_ARG(x) (void)x #endif /* LWIP_UNUSED_ARG */ #ifdef __cplusplus } #endif #endif /* LWIP_HDR_ARCH_H */