Dieter Graef / Mbed 2 deprecated Nucleo_F746ZG_Ethernet

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Dependencies:   F7_Ethernet mbed

mbed-rtos/rtx/TARGET_ARM7/rt_MemBox.c@2:bcf5290d42bf, 2016-06-23 (annotated)

Committer:
DieterGraef
Date:
Thu Jun 23 09:07:47 2016 +0000
Revision:
2:bcf5290d42bf
Parent:
0:f9b6112278fe 
Corrected MAC issue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:f9b6112278fe 1 /*----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 2 * RL-ARM - RTX
DieterGraef 0:f9b6112278fe 3 *----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 4 * Name: RT_MEMBOX.C
DieterGraef 0:f9b6112278fe 5 * Purpose: Interface functions for fixed memory block management system
DieterGraef 0:f9b6112278fe 6 * Rev.: V4.60
DieterGraef 0:f9b6112278fe 7 *----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 8 *
DieterGraef 0:f9b6112278fe 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
DieterGraef 0:f9b6112278fe 10 * All rights reserved.
DieterGraef 0:f9b6112278fe 11 * Redistribution and use in source and binary forms, with or without
DieterGraef 0:f9b6112278fe 12 * modification, are permitted provided that the following conditions are met:
DieterGraef 0:f9b6112278fe 13 * - Redistributions of source code must retain the above copyright
DieterGraef 0:f9b6112278fe 14 * notice, this list of conditions and the following disclaimer.
DieterGraef 0:f9b6112278fe 15 * - Redistributions in binary form must reproduce the above copyright
DieterGraef 0:f9b6112278fe 16 * notice, this list of conditions and the following disclaimer in the
DieterGraef 0:f9b6112278fe 17 * documentation and/or other materials provided with the distribution.
DieterGraef 0:f9b6112278fe 18 * - Neither the name of ARM nor the names of its contributors may be used
DieterGraef 0:f9b6112278fe 19 * to endorse or promote products derived from this software without
DieterGraef 0:f9b6112278fe 20 * specific prior written permission.
DieterGraef 0:f9b6112278fe 21 *
DieterGraef 0:f9b6112278fe 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
DieterGraef 0:f9b6112278fe 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
DieterGraef 0:f9b6112278fe 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
DieterGraef 0:f9b6112278fe 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
DieterGraef 0:f9b6112278fe 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
DieterGraef 0:f9b6112278fe 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
DieterGraef 0:f9b6112278fe 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
DieterGraef 0:f9b6112278fe 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
DieterGraef 0:f9b6112278fe 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
DieterGraef 0:f9b6112278fe 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
DieterGraef 0:f9b6112278fe 32 * POSSIBILITY OF SUCH DAMAGE.
DieterGraef 0:f9b6112278fe 33 *---------------------------------------------------------------------------*/
DieterGraef 0:f9b6112278fe 34
DieterGraef 0:f9b6112278fe 35 #include "rt_TypeDef.h"
DieterGraef 0:f9b6112278fe 36 #include "RTX_Conf.h"
DieterGraef 0:f9b6112278fe 37 #include "rt_System.h"
DieterGraef 0:f9b6112278fe 38 #include "rt_MemBox.h"
DieterGraef 0:f9b6112278fe 39 #include "rt_HAL_CM.h"
DieterGraef 0:f9b6112278fe 40
DieterGraef 0:f9b6112278fe 41 /*----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 42 * Global Functions
DieterGraef 0:f9b6112278fe 43 *---------------------------------------------------------------------------*/
DieterGraef 0:f9b6112278fe 44
DieterGraef 0:f9b6112278fe 45
DieterGraef 0:f9b6112278fe 46 /*--------------------------- _init_box -------------------------------------*/
DieterGraef 0:f9b6112278fe 47
DieterGraef 0:f9b6112278fe 48 int _init_box (void *box_mem, U32 box_size, U32 blk_size) {
DieterGraef 0:f9b6112278fe 49 /* Initialize memory block system, returns 0 if OK, 1 if fails. */
DieterGraef 0:f9b6112278fe 50 void *end;
DieterGraef 0:f9b6112278fe 51 void *blk;
DieterGraef 0:f9b6112278fe 52 void *next;
DieterGraef 0:f9b6112278fe 53 U32 sizeof_bm;
DieterGraef 0:f9b6112278fe 54
DieterGraef 0:f9b6112278fe 55 /* Create memory structure. */
DieterGraef 0:f9b6112278fe 56 if (blk_size & BOX_ALIGN_8) {
DieterGraef 0:f9b6112278fe 57 /* Memory blocks 8-byte aligned. */
DieterGraef 0:f9b6112278fe 58 blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
DieterGraef 0:f9b6112278fe 59 sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
DieterGraef 0:f9b6112278fe 60 }
DieterGraef 0:f9b6112278fe 61 else {
DieterGraef 0:f9b6112278fe 62 /* Memory blocks 4-byte aligned. */
DieterGraef 0:f9b6112278fe 63 blk_size = (blk_size + 3) & ~3;
DieterGraef 0:f9b6112278fe 64 sizeof_bm = sizeof (struct OS_BM);
DieterGraef 0:f9b6112278fe 65 }
DieterGraef 0:f9b6112278fe 66 if (blk_size == 0) {
DieterGraef 0:f9b6112278fe 67 return (1);
DieterGraef 0:f9b6112278fe 68 }
DieterGraef 0:f9b6112278fe 69 if ((blk_size + sizeof_bm) > box_size) {
DieterGraef 0:f9b6112278fe 70 return (1);
DieterGraef 0:f9b6112278fe 71 }
DieterGraef 0:f9b6112278fe 72 /* Create a Memory structure. */
DieterGraef 0:f9b6112278fe 73 blk = ((U8 *) box_mem) + sizeof_bm;
DieterGraef 0:f9b6112278fe 74 ((P_BM) box_mem)->free = blk;
DieterGraef 0:f9b6112278fe 75 end = ((U8 *) box_mem) + box_size;
DieterGraef 0:f9b6112278fe 76 ((P_BM) box_mem)->end = end;
DieterGraef 0:f9b6112278fe 77 ((P_BM) box_mem)->blk_size = blk_size;
DieterGraef 0:f9b6112278fe 78
DieterGraef 0:f9b6112278fe 79 /* Link all free blocks using offsets. */
DieterGraef 0:f9b6112278fe 80 end = ((U8 *) end) - blk_size;
DieterGraef 0:f9b6112278fe 81 while (1) {
DieterGraef 0:f9b6112278fe 82 next = ((U8 *) blk) + blk_size;
DieterGraef 0:f9b6112278fe 83 if (next > end) break;
DieterGraef 0:f9b6112278fe 84 *((void **)blk) = next;
DieterGraef 0:f9b6112278fe 85 blk = next;
DieterGraef 0:f9b6112278fe 86 }
DieterGraef 0:f9b6112278fe 87 /* end marker */
DieterGraef 0:f9b6112278fe 88 *((void **)blk) = 0;
DieterGraef 0:f9b6112278fe 89 return (0);
DieterGraef 0:f9b6112278fe 90 }
DieterGraef 0:f9b6112278fe 91
DieterGraef 0:f9b6112278fe 92 /*--------------------------- rt_alloc_box ----------------------------------*/
DieterGraef 0:f9b6112278fe 93
DieterGraef 0:f9b6112278fe 94 void *rt_alloc_box (void *box_mem) {
DieterGraef 0:f9b6112278fe 95 /* Allocate a memory block and return start address. */
DieterGraef 0:f9b6112278fe 96 void **free;
DieterGraef 0:f9b6112278fe 97 #ifndef __USE_EXCLUSIVE_ACCESS
DieterGraef 0:f9b6112278fe 98 int irq_dis;
DieterGraef 0:f9b6112278fe 99
DieterGraef 0:f9b6112278fe 100 irq_dis = __disable_irq ();
DieterGraef 0:f9b6112278fe 101 free = ((P_BM) box_mem)->free;
DieterGraef 0:f9b6112278fe 102 if (free) {
DieterGraef 0:f9b6112278fe 103 ((P_BM) box_mem)->free = *free;
DieterGraef 0:f9b6112278fe 104 }
DieterGraef 0:f9b6112278fe 105 if (!irq_dis) __enable_irq ();
DieterGraef 0:f9b6112278fe 106 #else
DieterGraef 0:f9b6112278fe 107 do {
DieterGraef 0:f9b6112278fe 108 if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
DieterGraef 0:f9b6112278fe 109 __clrex();
DieterGraef 0:f9b6112278fe 110 break;
DieterGraef 0:f9b6112278fe 111 }
DieterGraef 0:f9b6112278fe 112 } while (__strex((U32)*free, &((P_BM) box_mem)->free));
DieterGraef 0:f9b6112278fe 113 #endif
DieterGraef 0:f9b6112278fe 114 return (free);
DieterGraef 0:f9b6112278fe 115 }
DieterGraef 0:f9b6112278fe 116
DieterGraef 0:f9b6112278fe 117
DieterGraef 0:f9b6112278fe 118 /*--------------------------- _calloc_box -----------------------------------*/
DieterGraef 0:f9b6112278fe 119
DieterGraef 0:f9b6112278fe 120 void *_calloc_box (void *box_mem) {
DieterGraef 0:f9b6112278fe 121 /* Allocate a 0-initialized memory block and return start address. */
DieterGraef 0:f9b6112278fe 122 void *free;
DieterGraef 0:f9b6112278fe 123 U32 *p;
DieterGraef 0:f9b6112278fe 124 U32 i;
DieterGraef 0:f9b6112278fe 125
DieterGraef 0:f9b6112278fe 126 free = _alloc_box (box_mem);
DieterGraef 0:f9b6112278fe 127 if (free) {
DieterGraef 0:f9b6112278fe 128 p = free;
DieterGraef 0:f9b6112278fe 129 for (i = ((P_BM) box_mem)->blk_size; i; i -= 4) {
DieterGraef 0:f9b6112278fe 130 *p = 0;
DieterGraef 0:f9b6112278fe 131 p++;
DieterGraef 0:f9b6112278fe 132 }
DieterGraef 0:f9b6112278fe 133 }
DieterGraef 0:f9b6112278fe 134 return (free);
DieterGraef 0:f9b6112278fe 135 }
DieterGraef 0:f9b6112278fe 136
DieterGraef 0:f9b6112278fe 137
DieterGraef 0:f9b6112278fe 138 /*--------------------------- rt_free_box -----------------------------------*/
DieterGraef 0:f9b6112278fe 139
DieterGraef 0:f9b6112278fe 140 int rt_free_box (void *box_mem, void *box) {
DieterGraef 0:f9b6112278fe 141 /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
DieterGraef 0:f9b6112278fe 142 #ifndef __USE_EXCLUSIVE_ACCESS
DieterGraef 0:f9b6112278fe 143 int irq_dis;
DieterGraef 0:f9b6112278fe 144 #endif
DieterGraef 0:f9b6112278fe 145
DieterGraef 0:f9b6112278fe 146 if (box < box_mem || box >= ((P_BM) box_mem)->end) {
DieterGraef 0:f9b6112278fe 147 return (1);
DieterGraef 0:f9b6112278fe 148 }
DieterGraef 0:f9b6112278fe 149
DieterGraef 0:f9b6112278fe 150 #ifndef __USE_EXCLUSIVE_ACCESS
DieterGraef 0:f9b6112278fe 151 irq_dis = __disable_irq ();
DieterGraef 0:f9b6112278fe 152 *((void **)box) = ((P_BM) box_mem)->free;
DieterGraef 0:f9b6112278fe 153 ((P_BM) box_mem)->free = box;
DieterGraef 0:f9b6112278fe 154 if (!irq_dis) __enable_irq ();
DieterGraef 0:f9b6112278fe 155 #else
DieterGraef 0:f9b6112278fe 156 do {
DieterGraef 0:f9b6112278fe 157 *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
DieterGraef 0:f9b6112278fe 158 } while (__strex ((U32)box, &((P_BM) box_mem)->free));
DieterGraef 0:f9b6112278fe 159 #endif
DieterGraef 0:f9b6112278fe 160 return (0);
DieterGraef 0:f9b6112278fe 161 }
DieterGraef 0:f9b6112278fe 162
DieterGraef 0:f9b6112278fe 163 /*----------------------------------------------------------------------------
DieterGraef 0:f9b6112278fe 164 * end of file
DieterGraef 0:f9b6112278fe 165 *---------------------------------------------------------------------------*/
DieterGraef 0:f9b6112278fe 166