| /** |
| * @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 <adam@sics.se> |
| * |
| */ |
| #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 <stdint.h> |
| 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 <inttypes.h> |
| #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 */ |