Shoaib Ahmed / Mbed 2 deprecated uzairkhan

Final 350 project

Dependencies:   uzair Camera_LS_Y201 F7_Ethernet LCD_DISCO_F746NG NetworkAPI SDFileSystem mbed

mbed-rtos/rtx/TARGET_ARM7/rt_MemBox.c@0:791a779d6220, 2017-07-31 (annotated)

Committer:
shoaib_ahmed
Date:
Mon Jul 31 09:16:35 2017 +0000
Revision:
0:791a779d6220
final project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shoaib_ahmed 0:791a779d6220 1 /*----------------------------------------------------------------------------
shoaib_ahmed 0:791a779d6220 2 * RL-ARM - RTX
shoaib_ahmed 0:791a779d6220 3 *----------------------------------------------------------------------------
shoaib_ahmed 0:791a779d6220 4 * Name: RT_MEMBOX.C
shoaib_ahmed 0:791a779d6220 5 * Purpose: Interface functions for fixed memory block management system
shoaib_ahmed 0:791a779d6220 6 * Rev.: V4.60
shoaib_ahmed 0:791a779d6220 7 *----------------------------------------------------------------------------
shoaib_ahmed 0:791a779d6220 8 *
shoaib_ahmed 0:791a779d6220 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
shoaib_ahmed 0:791a779d6220 10 * All rights reserved.
shoaib_ahmed 0:791a779d6220 11 * Redistribution and use in source and binary forms, with or without
shoaib_ahmed 0:791a779d6220 12 * modification, are permitted provided that the following conditions are met:
shoaib_ahmed 0:791a779d6220 13 * - Redistributions of source code must retain the above copyright
shoaib_ahmed 0:791a779d6220 14 * notice, this list of conditions and the following disclaimer.
shoaib_ahmed 0:791a779d6220 15 * - Redistributions in binary form must reproduce the above copyright
shoaib_ahmed 0:791a779d6220 16 * notice, this list of conditions and the following disclaimer in the
shoaib_ahmed 0:791a779d6220 17 * documentation and/or other materials provided with the distribution.
shoaib_ahmed 0:791a779d6220 18 * - Neither the name of ARM nor the names of its contributors may be used
shoaib_ahmed 0:791a779d6220 19 * to endorse or promote products derived from this software without
shoaib_ahmed 0:791a779d6220 20 * specific prior written permission.
shoaib_ahmed 0:791a779d6220 21 *
shoaib_ahmed 0:791a779d6220 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
shoaib_ahmed 0:791a779d6220 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
shoaib_ahmed 0:791a779d6220 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
shoaib_ahmed 0:791a779d6220 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
shoaib_ahmed 0:791a779d6220 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
shoaib_ahmed 0:791a779d6220 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
shoaib_ahmed 0:791a779d6220 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
shoaib_ahmed 0:791a779d6220 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
shoaib_ahmed 0:791a779d6220 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
shoaib_ahmed 0:791a779d6220 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
shoaib_ahmed 0:791a779d6220 32 * POSSIBILITY OF SUCH DAMAGE.
shoaib_ahmed 0:791a779d6220 33 *---------------------------------------------------------------------------*/
shoaib_ahmed 0:791a779d6220 34
shoaib_ahmed 0:791a779d6220 35 #include "rt_TypeDef.h"
shoaib_ahmed 0:791a779d6220 36 #include "RTX_Conf.h"
shoaib_ahmed 0:791a779d6220 37 #include "rt_System.h"
shoaib_ahmed 0:791a779d6220 38 #include "rt_MemBox.h"
shoaib_ahmed 0:791a779d6220 39 #include "rt_HAL_CM.h"
shoaib_ahmed 0:791a779d6220 40
shoaib_ahmed 0:791a779d6220 41 /*----------------------------------------------------------------------------
shoaib_ahmed 0:791a779d6220 42 * Global Functions
shoaib_ahmed 0:791a779d6220 43 *---------------------------------------------------------------------------*/
shoaib_ahmed 0:791a779d6220 44
shoaib_ahmed 0:791a779d6220 45
shoaib_ahmed 0:791a779d6220 46 /*--------------------------- _init_box -------------------------------------*/
shoaib_ahmed 0:791a779d6220 47
shoaib_ahmed 0:791a779d6220 48 int _init_box (void *box_mem, U32 box_size, U32 blk_size) {
shoaib_ahmed 0:791a779d6220 49 /* Initialize memory block system, returns 0 if OK, 1 if fails. */
shoaib_ahmed 0:791a779d6220 50 void *end;
shoaib_ahmed 0:791a779d6220 51 void *blk;
shoaib_ahmed 0:791a779d6220 52 void *next;
shoaib_ahmed 0:791a779d6220 53 U32 sizeof_bm;
shoaib_ahmed 0:791a779d6220 54
shoaib_ahmed 0:791a779d6220 55 /* Create memory structure. */
shoaib_ahmed 0:791a779d6220 56 if (blk_size & BOX_ALIGN_8) {
shoaib_ahmed 0:791a779d6220 57 /* Memory blocks 8-byte aligned. */
shoaib_ahmed 0:791a779d6220 58 blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
shoaib_ahmed 0:791a779d6220 59 sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
shoaib_ahmed 0:791a779d6220 60 }
shoaib_ahmed 0:791a779d6220 61 else {
shoaib_ahmed 0:791a779d6220 62 /* Memory blocks 4-byte aligned. */
shoaib_ahmed 0:791a779d6220 63 blk_size = (blk_size + 3) & ~3;
shoaib_ahmed 0:791a779d6220 64 sizeof_bm = sizeof (struct OS_BM);
shoaib_ahmed 0:791a779d6220 65 }
shoaib_ahmed 0:791a779d6220 66 if (blk_size == 0) {
shoaib_ahmed 0:791a779d6220 67 return (1);
shoaib_ahmed 0:791a779d6220 68 }
shoaib_ahmed 0:791a779d6220 69 if ((blk_size + sizeof_bm) > box_size) {
shoaib_ahmed 0:791a779d6220 70 return (1);
shoaib_ahmed 0:791a779d6220 71 }
shoaib_ahmed 0:791a779d6220 72 /* Create a Memory structure. */
shoaib_ahmed 0:791a779d6220 73 blk = ((U8 *) box_mem) + sizeof_bm;
shoaib_ahmed 0:791a779d6220 74 ((P_BM) box_mem)->free = blk;
shoaib_ahmed 0:791a779d6220 75 end = ((U8 *) box_mem) + box_size;
shoaib_ahmed 0:791a779d6220 76 ((P_BM) box_mem)->end = end;
shoaib_ahmed 0:791a779d6220 77 ((P_BM) box_mem)->blk_size = blk_size;
shoaib_ahmed 0:791a779d6220 78
shoaib_ahmed 0:791a779d6220 79 /* Link all free blocks using offsets. */
shoaib_ahmed 0:791a779d6220 80 end = ((U8 *) end) - blk_size;
shoaib_ahmed 0:791a779d6220 81 while (1) {
shoaib_ahmed 0:791a779d6220 82 next = ((U8 *) blk) + blk_size;
shoaib_ahmed 0:791a779d6220 83 if (next > end) break;
shoaib_ahmed 0:791a779d6220 84 *((void **)blk) = next;
shoaib_ahmed 0:791a779d6220 85 blk = next;
shoaib_ahmed 0:791a779d6220 86 }
shoaib_ahmed 0:791a779d6220 87 /* end marker */
shoaib_ahmed 0:791a779d6220 88 *((void **)blk) = 0;
shoaib_ahmed 0:791a779d6220 89 return (0);
shoaib_ahmed 0:791a779d6220 90 }
shoaib_ahmed 0:791a779d6220 91
shoaib_ahmed 0:791a779d6220 92 /*--------------------------- rt_alloc_box ----------------------------------*/
shoaib_ahmed 0:791a779d6220 93
shoaib_ahmed 0:791a779d6220 94 void *rt_alloc_box (void *box_mem) {
shoaib_ahmed 0:791a779d6220 95 /* Allocate a memory block and return start address. */
shoaib_ahmed 0:791a779d6220 96 void **free;
shoaib_ahmed 0:791a779d6220 97 #ifndef __USE_EXCLUSIVE_ACCESS
shoaib_ahmed 0:791a779d6220 98 int irq_dis;
shoaib_ahmed 0:791a779d6220 99
shoaib_ahmed 0:791a779d6220 100 irq_dis = __disable_irq ();
shoaib_ahmed 0:791a779d6220 101 free = ((P_BM) box_mem)->free;
shoaib_ahmed 0:791a779d6220 102 if (free) {
shoaib_ahmed 0:791a779d6220 103 ((P_BM) box_mem)->free = *free;
shoaib_ahmed 0:791a779d6220 104 }
shoaib_ahmed 0:791a779d6220 105 if (!irq_dis) __enable_irq ();
shoaib_ahmed 0:791a779d6220 106 #else
shoaib_ahmed 0:791a779d6220 107 do {
shoaib_ahmed 0:791a779d6220 108 if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
shoaib_ahmed 0:791a779d6220 109 __clrex();
shoaib_ahmed 0:791a779d6220 110 break;
shoaib_ahmed 0:791a779d6220 111 }
shoaib_ahmed 0:791a779d6220 112 } while (__strex((U32)*free, &((P_BM) box_mem)->free));
shoaib_ahmed 0:791a779d6220 113 #endif
shoaib_ahmed 0:791a779d6220 114 return (free);
shoaib_ahmed 0:791a779d6220 115 }
shoaib_ahmed 0:791a779d6220 116
shoaib_ahmed 0:791a779d6220 117
shoaib_ahmed 0:791a779d6220 118 /*--------------------------- _calloc_box -----------------------------------*/
shoaib_ahmed 0:791a779d6220 119
shoaib_ahmed 0:791a779d6220 120 void *_calloc_box (void *box_mem) {
shoaib_ahmed 0:791a779d6220 121 /* Allocate a 0-initialized memory block and return start address. */
shoaib_ahmed 0:791a779d6220 122 void *free;
shoaib_ahmed 0:791a779d6220 123 U32 *p;
shoaib_ahmed 0:791a779d6220 124 U32 i;
shoaib_ahmed 0:791a779d6220 125
shoaib_ahmed 0:791a779d6220 126 free = _alloc_box (box_mem);
shoaib_ahmed 0:791a779d6220 127 if (free) {
shoaib_ahmed 0:791a779d6220 128 p = free;
shoaib_ahmed 0:791a779d6220 129 for (i = ((P_BM) box_mem)->blk_size; i; i -= 4) {
shoaib_ahmed 0:791a779d6220 130 *p = 0;
shoaib_ahmed 0:791a779d6220 131 p++;
shoaib_ahmed 0:791a779d6220 132 }
shoaib_ahmed 0:791a779d6220 133 }
shoaib_ahmed 0:791a779d6220 134 return (free);
shoaib_ahmed 0:791a779d6220 135 }
shoaib_ahmed 0:791a779d6220 136
shoaib_ahmed 0:791a779d6220 137
shoaib_ahmed 0:791a779d6220 138 /*--------------------------- rt_free_box -----------------------------------*/
shoaib_ahmed 0:791a779d6220 139
shoaib_ahmed 0:791a779d6220 140 int rt_free_box (void *box_mem, void *box) {
shoaib_ahmed 0:791a779d6220 141 /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
shoaib_ahmed 0:791a779d6220 142 #ifndef __USE_EXCLUSIVE_ACCESS
shoaib_ahmed 0:791a779d6220 143 int irq_dis;
shoaib_ahmed 0:791a779d6220 144 #endif
shoaib_ahmed 0:791a779d6220 145
shoaib_ahmed 0:791a779d6220 146 if (box < box_mem || box >= ((P_BM) box_mem)->end) {
shoaib_ahmed 0:791a779d6220 147 return (1);
shoaib_ahmed 0:791a779d6220 148 }
shoaib_ahmed 0:791a779d6220 149
shoaib_ahmed 0:791a779d6220 150 #ifndef __USE_EXCLUSIVE_ACCESS
shoaib_ahmed 0:791a779d6220 151 irq_dis = __disable_irq ();
shoaib_ahmed 0:791a779d6220 152 *((void **)box) = ((P_BM) box_mem)->free;
shoaib_ahmed 0:791a779d6220 153 ((P_BM) box_mem)->free = box;
shoaib_ahmed 0:791a779d6220 154 if (!irq_dis) __enable_irq ();
shoaib_ahmed 0:791a779d6220 155 #else
shoaib_ahmed 0:791a779d6220 156 do {
shoaib_ahmed 0:791a779d6220 157 *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
shoaib_ahmed 0:791a779d6220 158 } while (__strex ((U32)box, &((P_BM) box_mem)->free));
shoaib_ahmed 0:791a779d6220 159 #endif
shoaib_ahmed 0:791a779d6220 160 return (0);
shoaib_ahmed 0:791a779d6220 161 }
shoaib_ahmed 0:791a779d6220 162
shoaib_ahmed 0:791a779d6220 163 /*----------------------------------------------------------------------------
shoaib_ahmed 0:791a779d6220 164 * end of file
shoaib_ahmed 0:791a779d6220 165 *---------------------------------------------------------------------------*/
shoaib_ahmed 0:791a779d6220 166