Freeman Oldman / NUCLEO_STM32F401RE_CC3000_ILI9341

The code from https://github.com/vpcola/Nucleo

mbed-rtos/rtx/rt_MemBox.c@0:5464d5e415e5, 2014-10-08 (annotated)

Committer:
sinrab
Date:
Wed Oct 08 11:00:24 2014 +0000
Revision:
0:5464d5e415e5
The code from https://github.com/vpcola/Nucleo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sinrab 0:5464d5e415e5 1 /*----------------------------------------------------------------------------
sinrab 0:5464d5e415e5 2 * RL-ARM - RTX
sinrab 0:5464d5e415e5 3 *----------------------------------------------------------------------------
sinrab 0:5464d5e415e5 4 * Name: RT_MEMBOX.C
sinrab 0:5464d5e415e5 5 * Purpose: Interface functions for fixed memory block management system
sinrab 0:5464d5e415e5 6 * Rev.: V4.60
sinrab 0:5464d5e415e5 7 *----------------------------------------------------------------------------
sinrab 0:5464d5e415e5 8 *
sinrab 0:5464d5e415e5 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
sinrab 0:5464d5e415e5 10 * All rights reserved.
sinrab 0:5464d5e415e5 11 * Redistribution and use in source and binary forms, with or without
sinrab 0:5464d5e415e5 12 * modification, are permitted provided that the following conditions are met:
sinrab 0:5464d5e415e5 13 * - Redistributions of source code must retain the above copyright
sinrab 0:5464d5e415e5 14 * notice, this list of conditions and the following disclaimer.
sinrab 0:5464d5e415e5 15 * - Redistributions in binary form must reproduce the above copyright
sinrab 0:5464d5e415e5 16 * notice, this list of conditions and the following disclaimer in the
sinrab 0:5464d5e415e5 17 * documentation and/or other materials provided with the distribution.
sinrab 0:5464d5e415e5 18 * - Neither the name of ARM nor the names of its contributors may be used
sinrab 0:5464d5e415e5 19 * to endorse or promote products derived from this software without
sinrab 0:5464d5e415e5 20 * specific prior written permission.
sinrab 0:5464d5e415e5 21 *
sinrab 0:5464d5e415e5 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
sinrab 0:5464d5e415e5 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sinrab 0:5464d5e415e5 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sinrab 0:5464d5e415e5 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
sinrab 0:5464d5e415e5 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
sinrab 0:5464d5e415e5 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
sinrab 0:5464d5e415e5 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
sinrab 0:5464d5e415e5 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
sinrab 0:5464d5e415e5 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sinrab 0:5464d5e415e5 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sinrab 0:5464d5e415e5 32 * POSSIBILITY OF SUCH DAMAGE.
sinrab 0:5464d5e415e5 33 *---------------------------------------------------------------------------*/
sinrab 0:5464d5e415e5 34
sinrab 0:5464d5e415e5 35 #include "rt_TypeDef.h"
sinrab 0:5464d5e415e5 36 #include "RTX_Conf.h"
sinrab 0:5464d5e415e5 37 #include "rt_System.h"
sinrab 0:5464d5e415e5 38 #include "rt_MemBox.h"
sinrab 0:5464d5e415e5 39 #include "rt_HAL_CM.h"
sinrab 0:5464d5e415e5 40
sinrab 0:5464d5e415e5 41 /*----------------------------------------------------------------------------
sinrab 0:5464d5e415e5 42 * Global Functions
sinrab 0:5464d5e415e5 43 *---------------------------------------------------------------------------*/
sinrab 0:5464d5e415e5 44
sinrab 0:5464d5e415e5 45
sinrab 0:5464d5e415e5 46 /*--------------------------- _init_box -------------------------------------*/
sinrab 0:5464d5e415e5 47
sinrab 0:5464d5e415e5 48 int _init_box (void *box_mem, U32 box_size, U32 blk_size) {
sinrab 0:5464d5e415e5 49 /* Initialize memory block system, returns 0 if OK, 1 if fails. */
sinrab 0:5464d5e415e5 50 void *end;
sinrab 0:5464d5e415e5 51 void *blk;
sinrab 0:5464d5e415e5 52 void *next;
sinrab 0:5464d5e415e5 53 U32 sizeof_bm;
sinrab 0:5464d5e415e5 54
sinrab 0:5464d5e415e5 55 /* Create memory structure. */
sinrab 0:5464d5e415e5 56 if (blk_size & BOX_ALIGN_8) {
sinrab 0:5464d5e415e5 57 /* Memory blocks 8-byte aligned. */
sinrab 0:5464d5e415e5 58 blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
sinrab 0:5464d5e415e5 59 sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
sinrab 0:5464d5e415e5 60 }
sinrab 0:5464d5e415e5 61 else {
sinrab 0:5464d5e415e5 62 /* Memory blocks 4-byte aligned. */
sinrab 0:5464d5e415e5 63 blk_size = (blk_size + 3) & ~3;
sinrab 0:5464d5e415e5 64 sizeof_bm = sizeof (struct OS_BM);
sinrab 0:5464d5e415e5 65 }
sinrab 0:5464d5e415e5 66 if (blk_size == 0) {
sinrab 0:5464d5e415e5 67 return (1);
sinrab 0:5464d5e415e5 68 }
sinrab 0:5464d5e415e5 69 if ((blk_size + sizeof_bm) > box_size) {
sinrab 0:5464d5e415e5 70 return (1);
sinrab 0:5464d5e415e5 71 }
sinrab 0:5464d5e415e5 72 /* Create a Memory structure. */
sinrab 0:5464d5e415e5 73 blk = ((U8 *) box_mem) + sizeof_bm;
sinrab 0:5464d5e415e5 74 ((P_BM) box_mem)->free = blk;
sinrab 0:5464d5e415e5 75 end = ((U8 *) box_mem) + box_size;
sinrab 0:5464d5e415e5 76 ((P_BM) box_mem)->end = end;
sinrab 0:5464d5e415e5 77 ((P_BM) box_mem)->blk_size = blk_size;
sinrab 0:5464d5e415e5 78
sinrab 0:5464d5e415e5 79 /* Link all free blocks using offsets. */
sinrab 0:5464d5e415e5 80 end = ((U8 *) end) - blk_size;
sinrab 0:5464d5e415e5 81 while (1) {
sinrab 0:5464d5e415e5 82 next = ((U8 *) blk) + blk_size;
sinrab 0:5464d5e415e5 83 if (next > end) break;
sinrab 0:5464d5e415e5 84 *((void **)blk) = next;
sinrab 0:5464d5e415e5 85 blk = next;
sinrab 0:5464d5e415e5 86 }
sinrab 0:5464d5e415e5 87 /* end marker */
sinrab 0:5464d5e415e5 88 *((void **)blk) = 0;
sinrab 0:5464d5e415e5 89 return (0);
sinrab 0:5464d5e415e5 90 }
sinrab 0:5464d5e415e5 91
sinrab 0:5464d5e415e5 92 /*--------------------------- rt_alloc_box ----------------------------------*/
sinrab 0:5464d5e415e5 93
sinrab 0:5464d5e415e5 94 void *rt_alloc_box (void *box_mem) {
sinrab 0:5464d5e415e5 95 /* Allocate a memory block and return start address. */
sinrab 0:5464d5e415e5 96 void **free;
sinrab 0:5464d5e415e5 97 #ifndef __USE_EXCLUSIVE_ACCESS
sinrab 0:5464d5e415e5 98 int irq_dis;
sinrab 0:5464d5e415e5 99
sinrab 0:5464d5e415e5 100 irq_dis = __disable_irq ();
sinrab 0:5464d5e415e5 101 free = ((P_BM) box_mem)->free;
sinrab 0:5464d5e415e5 102 if (free) {
sinrab 0:5464d5e415e5 103 ((P_BM) box_mem)->free = *free;
sinrab 0:5464d5e415e5 104 }
sinrab 0:5464d5e415e5 105 if (!irq_dis) __enable_irq ();
sinrab 0:5464d5e415e5 106 #else
sinrab 0:5464d5e415e5 107 do {
sinrab 0:5464d5e415e5 108 if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
sinrab 0:5464d5e415e5 109 __clrex();
sinrab 0:5464d5e415e5 110 break;
sinrab 0:5464d5e415e5 111 }
sinrab 0:5464d5e415e5 112 } while (__strex((U32)*free, &((P_BM) box_mem)->free));
sinrab 0:5464d5e415e5 113 #endif
sinrab 0:5464d5e415e5 114 return (free);
sinrab 0:5464d5e415e5 115 }
sinrab 0:5464d5e415e5 116
sinrab 0:5464d5e415e5 117
sinrab 0:5464d5e415e5 118 /*--------------------------- _calloc_box -----------------------------------*/
sinrab 0:5464d5e415e5 119
sinrab 0:5464d5e415e5 120 void *_calloc_box (void *box_mem) {
sinrab 0:5464d5e415e5 121 /* Allocate a 0-initialized memory block and return start address. */
sinrab 0:5464d5e415e5 122 void *free;
sinrab 0:5464d5e415e5 123 U32 *p;
sinrab 0:5464d5e415e5 124 U32 i;
sinrab 0:5464d5e415e5 125
sinrab 0:5464d5e415e5 126 free = _alloc_box (box_mem);
sinrab 0:5464d5e415e5 127 if (free) {
sinrab 0:5464d5e415e5 128 p = free;
sinrab 0:5464d5e415e5 129 for (i = ((P_BM) box_mem)->blk_size; i; i -= 4) {
sinrab 0:5464d5e415e5 130 *p = 0;
sinrab 0:5464d5e415e5 131 p++;
sinrab 0:5464d5e415e5 132 }
sinrab 0:5464d5e415e5 133 }
sinrab 0:5464d5e415e5 134 return (free);
sinrab 0:5464d5e415e5 135 }
sinrab 0:5464d5e415e5 136
sinrab 0:5464d5e415e5 137
sinrab 0:5464d5e415e5 138 /*--------------------------- rt_free_box -----------------------------------*/
sinrab 0:5464d5e415e5 139
sinrab 0:5464d5e415e5 140 int rt_free_box (void *box_mem, void *box) {
sinrab 0:5464d5e415e5 141 /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
sinrab 0:5464d5e415e5 142 #ifndef __USE_EXCLUSIVE_ACCESS
sinrab 0:5464d5e415e5 143 int irq_dis;
sinrab 0:5464d5e415e5 144 #endif
sinrab 0:5464d5e415e5 145
sinrab 0:5464d5e415e5 146 if (box < box_mem || box >= ((P_BM) box_mem)->end) {
sinrab 0:5464d5e415e5 147 return (1);
sinrab 0:5464d5e415e5 148 }
sinrab 0:5464d5e415e5 149
sinrab 0:5464d5e415e5 150 #ifndef __USE_EXCLUSIVE_ACCESS
sinrab 0:5464d5e415e5 151 irq_dis = __disable_irq ();
sinrab 0:5464d5e415e5 152 *((void **)box) = ((P_BM) box_mem)->free;
sinrab 0:5464d5e415e5 153 ((P_BM) box_mem)->free = box;
sinrab 0:5464d5e415e5 154 if (!irq_dis) __enable_irq ();
sinrab 0:5464d5e415e5 155 #else
sinrab 0:5464d5e415e5 156 do {
sinrab 0:5464d5e415e5 157 *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
sinrab 0:5464d5e415e5 158 } while (__strex ((U32)box, &((P_BM) box_mem)->free));
sinrab 0:5464d5e415e5 159 #endif
sinrab 0:5464d5e415e5 160 return (0);
sinrab 0:5464d5e415e5 161 }
sinrab 0:5464d5e415e5 162
sinrab 0:5464d5e415e5 163 /*----------------------------------------------------------------------------
sinrab 0:5464d5e415e5 164 * end of file
sinrab 0:5464d5e415e5 165 *---------------------------------------------------------------------------*/
sinrab 0:5464d5e415e5 166
sinrab 0:5464d5e415e5 167