TeamGyro / mbed-rtos

OS2

Dependents:   GYRO_MPU6050 Bluetooth_Powered_Multimeter_Using_STM32F429_and_RTOS fyp

rtx/TARGET_CORTEX_A/rt_MemBox.c@0:a7c449cd2d5a, 2020-02-03 (annotated)

Committer:
guilhemMBED
Date:
Mon Feb 03 13:41:14 2020 +0000
Revision:
0:a7c449cd2d5a
previous version;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
guilhemMBED 0:a7c449cd2d5a 1 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 2 * RL-ARM - RTX
guilhemMBED 0:a7c449cd2d5a 3 *----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 4 * Name: RT_MEMBOX.C
guilhemMBED 0:a7c449cd2d5a 5 * Purpose: Interface functions for fixed memory block management system
guilhemMBED 0:a7c449cd2d5a 6 * Rev.: V4.70
guilhemMBED 0:a7c449cd2d5a 7 *----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 8 *
guilhemMBED 0:a7c449cd2d5a 9 * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
guilhemMBED 0:a7c449cd2d5a 10 * All rights reserved.
guilhemMBED 0:a7c449cd2d5a 11 * Redistribution and use in source and binary forms, with or without
guilhemMBED 0:a7c449cd2d5a 12 * modification, are permitted provided that the following conditions are met:
guilhemMBED 0:a7c449cd2d5a 13 * - Redistributions of source code must retain the above copyright
guilhemMBED 0:a7c449cd2d5a 14 * notice, this list of conditions and the following disclaimer.
guilhemMBED 0:a7c449cd2d5a 15 * - Redistributions in binary form must reproduce the above copyright
guilhemMBED 0:a7c449cd2d5a 16 * notice, this list of conditions and the following disclaimer in the
guilhemMBED 0:a7c449cd2d5a 17 * documentation and/or other materials provided with the distribution.
guilhemMBED 0:a7c449cd2d5a 18 * - Neither the name of ARM nor the names of its contributors may be used
guilhemMBED 0:a7c449cd2d5a 19 * to endorse or promote products derived from this software without
guilhemMBED 0:a7c449cd2d5a 20 * specific prior written permission.
guilhemMBED 0:a7c449cd2d5a 21 *
guilhemMBED 0:a7c449cd2d5a 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
guilhemMBED 0:a7c449cd2d5a 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
guilhemMBED 0:a7c449cd2d5a 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
guilhemMBED 0:a7c449cd2d5a 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
guilhemMBED 0:a7c449cd2d5a 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
guilhemMBED 0:a7c449cd2d5a 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
guilhemMBED 0:a7c449cd2d5a 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
guilhemMBED 0:a7c449cd2d5a 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
guilhemMBED 0:a7c449cd2d5a 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
guilhemMBED 0:a7c449cd2d5a 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
guilhemMBED 0:a7c449cd2d5a 32 * POSSIBILITY OF SUCH DAMAGE.
guilhemMBED 0:a7c449cd2d5a 33 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 34
guilhemMBED 0:a7c449cd2d5a 35 #include "rt_TypeDef.h"
guilhemMBED 0:a7c449cd2d5a 36 #include "RTX_Config.h"
guilhemMBED 0:a7c449cd2d5a 37 #include "rt_System.h"
guilhemMBED 0:a7c449cd2d5a 38 #include "rt_MemBox.h"
guilhemMBED 0:a7c449cd2d5a 39 #ifdef __CORTEX_A9
guilhemMBED 0:a7c449cd2d5a 40 #include "rt_HAL_CA.h"
guilhemMBED 0:a7c449cd2d5a 41 #else
guilhemMBED 0:a7c449cd2d5a 42 #include "rt_HAL_CM.h"
guilhemMBED 0:a7c449cd2d5a 43 #endif
guilhemMBED 0:a7c449cd2d5a 44
guilhemMBED 0:a7c449cd2d5a 45 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 46 * Global Functions
guilhemMBED 0:a7c449cd2d5a 47 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 48
guilhemMBED 0:a7c449cd2d5a 49
guilhemMBED 0:a7c449cd2d5a 50 /*--------------------------- _init_box -------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 51
guilhemMBED 0:a7c449cd2d5a 52 int _init_box (void *box_mem, U32 box_size, U32 blk_size) {
guilhemMBED 0:a7c449cd2d5a 53 /* Initialize memory block system, returns 0 if OK, 1 if fails. */
guilhemMBED 0:a7c449cd2d5a 54 void *end;
guilhemMBED 0:a7c449cd2d5a 55 void *blk;
guilhemMBED 0:a7c449cd2d5a 56 void *next;
guilhemMBED 0:a7c449cd2d5a 57 U32 sizeof_bm;
guilhemMBED 0:a7c449cd2d5a 58
guilhemMBED 0:a7c449cd2d5a 59 /* Create memory structure. */
guilhemMBED 0:a7c449cd2d5a 60 if (blk_size & BOX_ALIGN_8) {
guilhemMBED 0:a7c449cd2d5a 61 /* Memory blocks 8-byte aligned. */
guilhemMBED 0:a7c449cd2d5a 62 blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
guilhemMBED 0:a7c449cd2d5a 63 sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
guilhemMBED 0:a7c449cd2d5a 64 }
guilhemMBED 0:a7c449cd2d5a 65 else {
guilhemMBED 0:a7c449cd2d5a 66 /* Memory blocks 4-byte aligned. */
guilhemMBED 0:a7c449cd2d5a 67 blk_size = (blk_size + 3) & ~3;
guilhemMBED 0:a7c449cd2d5a 68 sizeof_bm = sizeof (struct OS_BM);
guilhemMBED 0:a7c449cd2d5a 69 }
guilhemMBED 0:a7c449cd2d5a 70 if (blk_size == 0) {
guilhemMBED 0:a7c449cd2d5a 71 return (1);
guilhemMBED 0:a7c449cd2d5a 72 }
guilhemMBED 0:a7c449cd2d5a 73 if ((blk_size + sizeof_bm) > box_size) {
guilhemMBED 0:a7c449cd2d5a 74 return (1);
guilhemMBED 0:a7c449cd2d5a 75 }
guilhemMBED 0:a7c449cd2d5a 76 /* Create a Memory structure. */
guilhemMBED 0:a7c449cd2d5a 77 blk = ((U8 *) box_mem) + sizeof_bm;
guilhemMBED 0:a7c449cd2d5a 78 ((P_BM) box_mem)->free = blk;
guilhemMBED 0:a7c449cd2d5a 79 end = ((U8 *) box_mem) + box_size;
guilhemMBED 0:a7c449cd2d5a 80 ((P_BM) box_mem)->end = end;
guilhemMBED 0:a7c449cd2d5a 81 ((P_BM) box_mem)->blk_size = blk_size;
guilhemMBED 0:a7c449cd2d5a 82
guilhemMBED 0:a7c449cd2d5a 83 /* Link all free blocks using offsets. */
guilhemMBED 0:a7c449cd2d5a 84 end = ((U8 *) end) - blk_size;
guilhemMBED 0:a7c449cd2d5a 85 while (1) {
guilhemMBED 0:a7c449cd2d5a 86 next = ((U8 *) blk) + blk_size;
guilhemMBED 0:a7c449cd2d5a 87 if (next > end) break;
guilhemMBED 0:a7c449cd2d5a 88 *((void **)blk) = next;
guilhemMBED 0:a7c449cd2d5a 89 blk = next;
guilhemMBED 0:a7c449cd2d5a 90 }
guilhemMBED 0:a7c449cd2d5a 91 /* end marker */
guilhemMBED 0:a7c449cd2d5a 92 *((void **)blk) = 0;
guilhemMBED 0:a7c449cd2d5a 93 return (0);
guilhemMBED 0:a7c449cd2d5a 94 }
guilhemMBED 0:a7c449cd2d5a 95
guilhemMBED 0:a7c449cd2d5a 96 /*--------------------------- rt_alloc_box ----------------------------------*/
guilhemMBED 0:a7c449cd2d5a 97
guilhemMBED 0:a7c449cd2d5a 98 void *rt_alloc_box (void *box_mem) {
guilhemMBED 0:a7c449cd2d5a 99 /* Allocate a memory block and return start address. */
guilhemMBED 0:a7c449cd2d5a 100 void **free;
guilhemMBED 0:a7c449cd2d5a 101 #ifndef __USE_EXCLUSIVE_ACCESS
guilhemMBED 0:a7c449cd2d5a 102 int irq_dis;
guilhemMBED 0:a7c449cd2d5a 103
guilhemMBED 0:a7c449cd2d5a 104
guilhemMBED 0:a7c449cd2d5a 105 #if defined (__ICCARM__)
guilhemMBED 0:a7c449cd2d5a 106 irq_dis = __disable_irq_iar();
guilhemMBED 0:a7c449cd2d5a 107 #else
guilhemMBED 0:a7c449cd2d5a 108 irq_dis = __disable_irq ();
guilhemMBED 0:a7c449cd2d5a 109 #endif /* __ICCARM__ */
guilhemMBED 0:a7c449cd2d5a 110 free = ((P_BM) box_mem)->free;
guilhemMBED 0:a7c449cd2d5a 111 if (free) {
guilhemMBED 0:a7c449cd2d5a 112 ((P_BM) box_mem)->free = *free;
guilhemMBED 0:a7c449cd2d5a 113 }
guilhemMBED 0:a7c449cd2d5a 114 if (!irq_dis) __enable_irq ();
guilhemMBED 0:a7c449cd2d5a 115 #else
guilhemMBED 0:a7c449cd2d5a 116 do {
guilhemMBED 0:a7c449cd2d5a 117 if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
guilhemMBED 0:a7c449cd2d5a 118 __clrex();
guilhemMBED 0:a7c449cd2d5a 119 break;
guilhemMBED 0:a7c449cd2d5a 120 }
guilhemMBED 0:a7c449cd2d5a 121 } while (__strex((U32)*free, &((P_BM) box_mem)->free));
guilhemMBED 0:a7c449cd2d5a 122 #endif
guilhemMBED 0:a7c449cd2d5a 123 return (free);
guilhemMBED 0:a7c449cd2d5a 124 }
guilhemMBED 0:a7c449cd2d5a 125
guilhemMBED 0:a7c449cd2d5a 126
guilhemMBED 0:a7c449cd2d5a 127 /*--------------------------- _calloc_box -----------------------------------*/
guilhemMBED 0:a7c449cd2d5a 128
guilhemMBED 0:a7c449cd2d5a 129 void *_calloc_box (void *box_mem) {
guilhemMBED 0:a7c449cd2d5a 130 /* Allocate a 0-initialized memory block and return start address. */
guilhemMBED 0:a7c449cd2d5a 131 void *free;
guilhemMBED 0:a7c449cd2d5a 132 U32 *p;
guilhemMBED 0:a7c449cd2d5a 133 U32 i;
guilhemMBED 0:a7c449cd2d5a 134
guilhemMBED 0:a7c449cd2d5a 135 free = _alloc_box (box_mem);
guilhemMBED 0:a7c449cd2d5a 136 if (free) {
guilhemMBED 0:a7c449cd2d5a 137 p = free;
guilhemMBED 0:a7c449cd2d5a 138 for (i = ((P_BM) box_mem)->blk_size; i; i -= 4) {
guilhemMBED 0:a7c449cd2d5a 139 *p = 0;
guilhemMBED 0:a7c449cd2d5a 140 p++;
guilhemMBED 0:a7c449cd2d5a 141 }
guilhemMBED 0:a7c449cd2d5a 142 }
guilhemMBED 0:a7c449cd2d5a 143 return (free);
guilhemMBED 0:a7c449cd2d5a 144 }
guilhemMBED 0:a7c449cd2d5a 145
guilhemMBED 0:a7c449cd2d5a 146
guilhemMBED 0:a7c449cd2d5a 147 /*--------------------------- rt_free_box -----------------------------------*/
guilhemMBED 0:a7c449cd2d5a 148
guilhemMBED 0:a7c449cd2d5a 149 int rt_free_box (void *box_mem, void *box) {
guilhemMBED 0:a7c449cd2d5a 150 /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
guilhemMBED 0:a7c449cd2d5a 151 #ifndef __USE_EXCLUSIVE_ACCESS
guilhemMBED 0:a7c449cd2d5a 152 int irq_dis;
guilhemMBED 0:a7c449cd2d5a 153 #endif
guilhemMBED 0:a7c449cd2d5a 154
guilhemMBED 0:a7c449cd2d5a 155 if (box < box_mem || box >= ((P_BM) box_mem)->end) {
guilhemMBED 0:a7c449cd2d5a 156 return (1);
guilhemMBED 0:a7c449cd2d5a 157 }
guilhemMBED 0:a7c449cd2d5a 158
guilhemMBED 0:a7c449cd2d5a 159 #ifndef __USE_EXCLUSIVE_ACCESS
guilhemMBED 0:a7c449cd2d5a 160 #if defined (__ICCARM__)
guilhemMBED 0:a7c449cd2d5a 161 irq_dis = __disable_irq_iar();
guilhemMBED 0:a7c449cd2d5a 162 #else
guilhemMBED 0:a7c449cd2d5a 163 irq_dis = __disable_irq ();
guilhemMBED 0:a7c449cd2d5a 164 #endif /* __ICCARM__ */
guilhemMBED 0:a7c449cd2d5a 165 *((void **)box) = ((P_BM) box_mem)->free;
guilhemMBED 0:a7c449cd2d5a 166 ((P_BM) box_mem)->free = box;
guilhemMBED 0:a7c449cd2d5a 167 if (!irq_dis) __enable_irq ();
guilhemMBED 0:a7c449cd2d5a 168 #else
guilhemMBED 0:a7c449cd2d5a 169 do {
guilhemMBED 0:a7c449cd2d5a 170 *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
guilhemMBED 0:a7c449cd2d5a 171 } while (__strex ((U32)box, &((P_BM) box_mem)->free));
guilhemMBED 0:a7c449cd2d5a 172 #endif
guilhemMBED 0:a7c449cd2d5a 173 return (0);
guilhemMBED 0:a7c449cd2d5a 174 }
guilhemMBED 0:a7c449cd2d5a 175
guilhemMBED 0:a7c449cd2d5a 176 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 177 * end of file
guilhemMBED 0:a7c449cd2d5a 178 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 179