Nicolas Borla / Mbed OS BBR_1Ebene

BBR 1 Ebene

mbed-os/features/filesystem/bd/SlicingBlockDevice.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 "SlicingBlockDevice.h"
borlanic 0:fbdae7e6d805 18
borlanic 0:fbdae7e6d805 19
borlanic 0:fbdae7e6d805 20 SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop)
borlanic 0:fbdae7e6d805 21 : _bd(bd)
borlanic 0:fbdae7e6d805 22 , _start_from_end(false), _start(start)
borlanic 0:fbdae7e6d805 23 , _stop_from_end(false), _stop(stop)
borlanic 0:fbdae7e6d805 24 {
borlanic 0:fbdae7e6d805 25 if ((int64_t)_start < 0) {
borlanic 0:fbdae7e6d805 26 _start_from_end = true;
borlanic 0:fbdae7e6d805 27 _start = -_start;
borlanic 0:fbdae7e6d805 28 }
borlanic 0:fbdae7e6d805 29
borlanic 0:fbdae7e6d805 30 if ((int64_t)_stop <= 0) {
borlanic 0:fbdae7e6d805 31 _stop_from_end = true;
borlanic 0:fbdae7e6d805 32 _stop = -_stop;
borlanic 0:fbdae7e6d805 33 }
borlanic 0:fbdae7e6d805 34 }
borlanic 0:fbdae7e6d805 35
borlanic 0:fbdae7e6d805 36 int SlicingBlockDevice::init()
borlanic 0:fbdae7e6d805 37 {
borlanic 0:fbdae7e6d805 38 int err = _bd->init();
borlanic 0:fbdae7e6d805 39 if (err) {
borlanic 0:fbdae7e6d805 40 return err;
borlanic 0:fbdae7e6d805 41 }
borlanic 0:fbdae7e6d805 42
borlanic 0:fbdae7e6d805 43 bd_size_t size = _bd->size();
borlanic 0:fbdae7e6d805 44
borlanic 0:fbdae7e6d805 45 // Calculate from_end values
borlanic 0:fbdae7e6d805 46 if (_start_from_end) {
borlanic 0:fbdae7e6d805 47 _start_from_end = false;
borlanic 0:fbdae7e6d805 48 _start = size - _start;
borlanic 0:fbdae7e6d805 49 }
borlanic 0:fbdae7e6d805 50
borlanic 0:fbdae7e6d805 51 if (_stop_from_end) {
borlanic 0:fbdae7e6d805 52 _stop_from_end = false;
borlanic 0:fbdae7e6d805 53 _stop = size - _stop;
borlanic 0:fbdae7e6d805 54 }
borlanic 0:fbdae7e6d805 55
borlanic 0:fbdae7e6d805 56 // Check that block addresses are valid
borlanic 0:fbdae7e6d805 57 MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start));
borlanic 0:fbdae7e6d805 58
borlanic 0:fbdae7e6d805 59 return 0;
borlanic 0:fbdae7e6d805 60 }
borlanic 0:fbdae7e6d805 61
borlanic 0:fbdae7e6d805 62 int SlicingBlockDevice::deinit()
borlanic 0:fbdae7e6d805 63 {
borlanic 0:fbdae7e6d805 64 return _bd->deinit();
borlanic 0:fbdae7e6d805 65 }
borlanic 0:fbdae7e6d805 66
borlanic 0:fbdae7e6d805 67 int SlicingBlockDevice::sync()
borlanic 0:fbdae7e6d805 68 {
borlanic 0:fbdae7e6d805 69 return _bd->sync();
borlanic 0:fbdae7e6d805 70 }
borlanic 0:fbdae7e6d805 71
borlanic 0:fbdae7e6d805 72 int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 73 {
borlanic 0:fbdae7e6d805 74 MBED_ASSERT(is_valid_read(addr, size));
borlanic 0:fbdae7e6d805 75 return _bd->read(b, addr + _start, size);
borlanic 0:fbdae7e6d805 76 }
borlanic 0:fbdae7e6d805 77
borlanic 0:fbdae7e6d805 78 int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 79 {
borlanic 0:fbdae7e6d805 80 MBED_ASSERT(is_valid_program(addr, size));
borlanic 0:fbdae7e6d805 81 return _bd->program(b, addr + _start, size);
borlanic 0:fbdae7e6d805 82 }
borlanic 0:fbdae7e6d805 83
borlanic 0:fbdae7e6d805 84 int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size)
borlanic 0:fbdae7e6d805 85 {
borlanic 0:fbdae7e6d805 86 MBED_ASSERT(is_valid_erase(addr, size));
borlanic 0:fbdae7e6d805 87 return _bd->erase(addr + _start, size);
borlanic 0:fbdae7e6d805 88 }
borlanic 0:fbdae7e6d805 89
borlanic 0:fbdae7e6d805 90 bd_size_t SlicingBlockDevice::get_read_size() const
borlanic 0:fbdae7e6d805 91 {
borlanic 0:fbdae7e6d805 92 return _bd->get_read_size();
borlanic 0:fbdae7e6d805 93 }
borlanic 0:fbdae7e6d805 94
borlanic 0:fbdae7e6d805 95 bd_size_t SlicingBlockDevice::get_program_size() const
borlanic 0:fbdae7e6d805 96 {
borlanic 0:fbdae7e6d805 97 return _bd->get_program_size();
borlanic 0:fbdae7e6d805 98 }
borlanic 0:fbdae7e6d805 99
borlanic 0:fbdae7e6d805 100 bd_size_t SlicingBlockDevice::get_erase_size() const
borlanic 0:fbdae7e6d805 101 {
borlanic 0:fbdae7e6d805 102 return _bd->get_erase_size();
borlanic 0:fbdae7e6d805 103 }
borlanic 0:fbdae7e6d805 104
borlanic 0:fbdae7e6d805 105 bd_size_t SlicingBlockDevice::get_erase_size(bd_addr_t addr) const
borlanic 0:fbdae7e6d805 106 {
borlanic 0:fbdae7e6d805 107 return _bd->get_erase_size(_start + addr);
borlanic 0:fbdae7e6d805 108 }
borlanic 0:fbdae7e6d805 109
borlanic 0:fbdae7e6d805 110 int SlicingBlockDevice::get_erase_value() const
borlanic 0:fbdae7e6d805 111 {
borlanic 0:fbdae7e6d805 112 return _bd->get_erase_value();
borlanic 0:fbdae7e6d805 113 }
borlanic 0:fbdae7e6d805 114
borlanic 0:fbdae7e6d805 115 bd_size_t SlicingBlockDevice::size() const
borlanic 0:fbdae7e6d805 116 {
borlanic 0:fbdae7e6d805 117 return _stop - _start;
borlanic 0:fbdae7e6d805 118 }