Nicolas Borla / Mbed OS BBR_1Ebene

BBR 1 Ebene

mbed-os/features/filesystem/bd/ExhaustibleBlockDevice.cpp@0:fbdae7e6d805, 2018-05-14 (annotated)

Committer:
borlanic
Date:
Mon May 14 11:29:06 2018 +0000
Revision:
0:fbdae7e6d805
BBR

Who changed what in which revision?

UserRevisionLine numberNew contents of line
borlanic 0:fbdae7e6d805 1 /* mbed Microcontroller Library
borlanic 0:fbdae7e6d805 2 * Copyright (c) 2017 ARM Limited
borlanic 0:fbdae7e6d805 3 *
borlanic 0:fbdae7e6d805 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:fbdae7e6d805 5 * you may not use this file except in compliance with the License.
borlanic 0:fbdae7e6d805 6 * You may obtain a copy of the License at
borlanic 0:fbdae7e6d805 7 *
borlanic 0:fbdae7e6d805 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:fbdae7e6d805 9 *
borlanic 0:fbdae7e6d805 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:fbdae7e6d805 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:fbdae7e6d805 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:fbdae7e6d805 13 * See the License for the specific language governing permissions and
borlanic 0:fbdae7e6d805 14 * limitations under the License.
borlanic 0:fbdae7e6d805 15 */
borlanic 0:fbdae7e6d805 16
borlanic 0:fbdae7e6d805 17 #include "ExhaustibleBlockDevice.h"
borlanic 0:fbdae7e6d805 18 #include "mbed.h"
borlanic 0:fbdae7e6d805 19
borlanic 0:fbdae7e6d805 20
borlanic 0:fbdae7e6d805 21 ExhaustibleBlockDevice::ExhaustibleBlockDevice(BlockDevice *bd, uint32_t erase_cycles)
borlanic 0:fbdae7e6d805 22 : _bd(bd), _erase_array(NULL), _erase_cycles(erase_cycles)
borlanic 0:fbdae7e6d805 23 {
borlanic 0:fbdae7e6d805 24 }
borlanic 0:fbdae7e6d805 25
borlanic 0:fbdae7e6d805 26 ExhaustibleBlockDevice::~ExhaustibleBlockDevice()
borlanic 0:fbdae7e6d805 27 {
borlanic 0:fbdae7e6d805 28 delete[] _erase_array;
borlanic 0:fbdae7e6d805 29 }
borlanic 0:fbdae7e6d805 30
borlanic 0:fbdae7e6d805 31 int ExhaustibleBlockDevice::init()
borlanic 0:fbdae7e6d805 32 {
borlanic 0:fbdae7e6d805 33 int err = _bd->init();
borlanic 0:fbdae7e6d805 34 if (err) {
borlanic 0:fbdae7e6d805 35 return err;
borlanic 0:fbdae7e6d805 36 }
borlanic 0:fbdae7e6d805 37
borlanic 0:fbdae7e6d805 38 if (!_erase_array) {
borlanic 0:fbdae7e6d805 39 // can only be allocated after initialization
borlanic 0:fbdae7e6d805 40 _erase_array = new uint32_t[_bd->size() / _bd->get_erase_size()];
borlanic 0:fbdae7e6d805 41 for (size_t i = 0; i < _bd->size() / _bd->get_erase_size(); i++) {
borlanic 0:fbdae7e6d805 42 _erase_array[i] = _erase_cycles;
borlanic 0:fbdae7e6d805 43 }
borlanic 0:fbdae7e6d805 44 }
borlanic 0:fbdae7e6d805 45
borlanic 0:fbdae7e6d805 46 return 0;
borlanic 0:fbdae7e6d805 47 }
borlanic 0:fbdae7e6d805 48
borlanic 0:fbdae7e6d805 49 int ExhaustibleBlockDevice::deinit()
borlanic 0:fbdae7e6d805 50 {
borlanic 0:fbdae7e6d805 51 // _erase_array is lazily cleaned up in destructor to allow
borlanic 0:fbdae7e6d805 52 // data to live across de/reinitialization
borlanic 0:fbdae7e6d805 53 return _bd->deinit();
borlanic 0:fbdae7e6d805 54 }
borlanic 0:fbdae7e6d805 55
borlanic 0:fbdae7e6d805 56 int ExhaustibleBlockDevice::sync()
borlanic 0:fbdae7e6d805 57 {
borlanic 0:fbdae7e6d805 58 return _bd->sync();
borlanic 0:fbdae7e6d805 59 }
borlanic 0:fbdae7e6d805 60
borlanic 0:fbdae7e6d805 61 int ExhaustibleBlockDevice::read(void *buffer, bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 62 {
borlanic 0:fbdae7e6d805 63 return _bd->read(buffer, addr, size);
borlanic 0:fbdae7e6d805 64 }
borlanic 0:fbdae7e6d805 65
borlanic 0:fbdae7e6d805 66 int ExhaustibleBlockDevice::program(const void *buffer, bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 67 {
borlanic 0:fbdae7e6d805 68 MBED_ASSERT(is_valid_program(addr, size));
borlanic 0:fbdae7e6d805 69
borlanic 0:fbdae7e6d805 70 if (_erase_array[addr / get_erase_size()] == 0) {
borlanic 0:fbdae7e6d805 71 // TODO possibly something more destructive here
borlanic 0:fbdae7e6d805 72 return 0;
borlanic 0:fbdae7e6d805 73 }
borlanic 0:fbdae7e6d805 74
borlanic 0:fbdae7e6d805 75 return _bd->program(buffer, addr, size);
borlanic 0:fbdae7e6d805 76 }
borlanic 0:fbdae7e6d805 77
borlanic 0:fbdae7e6d805 78 int ExhaustibleBlockDevice::erase(bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 79 {
borlanic 0:fbdae7e6d805 80 MBED_ASSERT(is_valid_erase(addr, size));
borlanic 0:fbdae7e6d805 81
borlanic 0:fbdae7e6d805 82 // use an erase cycle
borlanic 0:fbdae7e6d805 83 if (_erase_array[addr / get_erase_size()] > 0) {
borlanic 0:fbdae7e6d805 84 _erase_array[addr / get_erase_size()] -= 1;
borlanic 0:fbdae7e6d805 85 }
borlanic 0:fbdae7e6d805 86
borlanic 0:fbdae7e6d805 87 if (_erase_array[addr / get_erase_size()] == 0) {
borlanic 0:fbdae7e6d805 88 // TODO possibly something more destructive here
borlanic 0:fbdae7e6d805 89 return 0;
borlanic 0:fbdae7e6d805 90 }
borlanic 0:fbdae7e6d805 91
borlanic 0:fbdae7e6d805 92 return _bd->erase(addr, size);
borlanic 0:fbdae7e6d805 93 }
borlanic 0:fbdae7e6d805 94
borlanic 0:fbdae7e6d805 95 bd_size_t ExhaustibleBlockDevice::get_read_size() const
borlanic 0:fbdae7e6d805 96 {
borlanic 0:fbdae7e6d805 97 return _bd->get_read_size();
borlanic 0:fbdae7e6d805 98 }
borlanic 0:fbdae7e6d805 99
borlanic 0:fbdae7e6d805 100 bd_size_t ExhaustibleBlockDevice::get_program_size() const
borlanic 0:fbdae7e6d805 101 {
borlanic 0:fbdae7e6d805 102 return _bd->get_program_size();
borlanic 0:fbdae7e6d805 103 }
borlanic 0:fbdae7e6d805 104
borlanic 0:fbdae7e6d805 105 bd_size_t ExhaustibleBlockDevice::get_erase_size() const
borlanic 0:fbdae7e6d805 106 {
borlanic 0:fbdae7e6d805 107 return _bd->get_erase_size();
borlanic 0:fbdae7e6d805 108 }
borlanic 0:fbdae7e6d805 109
borlanic 0:fbdae7e6d805 110 bd_size_t ExhaustibleBlockDevice::get_erase_size(bd_addr_t addr) const
borlanic 0:fbdae7e6d805 111 {
borlanic 0:fbdae7e6d805 112 return _bd->get_erase_size(addr);
borlanic 0:fbdae7e6d805 113 }
borlanic 0:fbdae7e6d805 114
borlanic 0:fbdae7e6d805 115 int ExhaustibleBlockDevice::get_erase_value() const
borlanic 0:fbdae7e6d805 116 {
borlanic 0:fbdae7e6d805 117 return _bd->get_erase_value();
borlanic 0:fbdae7e6d805 118 }
borlanic 0:fbdae7e6d805 119
borlanic 0:fbdae7e6d805 120 bd_size_t ExhaustibleBlockDevice::size() const
borlanic 0:fbdae7e6d805 121 {
borlanic 0:fbdae7e6d805 122 return _bd->size();
borlanic 0:fbdae7e6d805 123 }