Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

features/filesystem/bd/SlicingBlockDevice.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

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dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2017 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16
dkato 0:f782d9c66c49 17 #include "SlicingBlockDevice.h"
dkato 0:f782d9c66c49 18
dkato 0:f782d9c66c49 19
dkato 0:f782d9c66c49 20 SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start)
dkato 0:f782d9c66c49 21 : _bd(bd)
dkato 0:f782d9c66c49 22 , _start_from_end(false), _start(start)
dkato 0:f782d9c66c49 23 , _stop_from_end(true), _stop(0)
dkato 0:f782d9c66c49 24 {
dkato 0:f782d9c66c49 25 if ((int64_t)_start < 0) {
dkato 0:f782d9c66c49 26 _start_from_end = true;
dkato 0:f782d9c66c49 27 _start = -_start;
dkato 0:f782d9c66c49 28 }
dkato 0:f782d9c66c49 29 }
dkato 0:f782d9c66c49 30
dkato 0:f782d9c66c49 31 SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop)
dkato 0:f782d9c66c49 32 : _bd(bd)
dkato 0:f782d9c66c49 33 , _start_from_end(false), _start(start)
dkato 0:f782d9c66c49 34 , _stop_from_end(false), _stop(stop)
dkato 0:f782d9c66c49 35 {
dkato 0:f782d9c66c49 36 if ((int64_t)_start < 0) {
dkato 0:f782d9c66c49 37 _start_from_end = true;
dkato 0:f782d9c66c49 38 _start = -_start;
dkato 0:f782d9c66c49 39 }
dkato 0:f782d9c66c49 40
dkato 0:f782d9c66c49 41 if ((int64_t)_stop < 0) {
dkato 0:f782d9c66c49 42 _stop_from_end = true;
dkato 0:f782d9c66c49 43 _stop = -_stop;
dkato 0:f782d9c66c49 44 }
dkato 0:f782d9c66c49 45 }
dkato 0:f782d9c66c49 46
dkato 0:f782d9c66c49 47 int SlicingBlockDevice::init()
dkato 0:f782d9c66c49 48 {
dkato 0:f782d9c66c49 49 int err = _bd->init();
dkato 0:f782d9c66c49 50 if (err) {
dkato 0:f782d9c66c49 51 return err;
dkato 0:f782d9c66c49 52 }
dkato 0:f782d9c66c49 53
dkato 0:f782d9c66c49 54 bd_size_t size = _bd->size();
dkato 0:f782d9c66c49 55
dkato 0:f782d9c66c49 56 // Calculate from_end values
dkato 0:f782d9c66c49 57 if (_start_from_end) {
dkato 0:f782d9c66c49 58 _start_from_end = false;
dkato 0:f782d9c66c49 59 _start = size - _start;
dkato 0:f782d9c66c49 60 }
dkato 0:f782d9c66c49 61
dkato 0:f782d9c66c49 62 if (_stop_from_end) {
dkato 0:f782d9c66c49 63 _stop_from_end = false;
dkato 0:f782d9c66c49 64 _stop = size - _stop;
dkato 0:f782d9c66c49 65 }
dkato 0:f782d9c66c49 66
dkato 0:f782d9c66c49 67 // Check that block addresses are valid
dkato 0:f782d9c66c49 68 MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start));
dkato 0:f782d9c66c49 69
dkato 0:f782d9c66c49 70 return 0;
dkato 0:f782d9c66c49 71 }
dkato 0:f782d9c66c49 72
dkato 0:f782d9c66c49 73 int SlicingBlockDevice::deinit()
dkato 0:f782d9c66c49 74 {
dkato 0:f782d9c66c49 75 return _bd->deinit();
dkato 0:f782d9c66c49 76 }
dkato 0:f782d9c66c49 77
dkato 0:f782d9c66c49 78 int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
dkato 0:f782d9c66c49 79 {
dkato 0:f782d9c66c49 80 MBED_ASSERT(is_valid_read(addr, size));
dkato 0:f782d9c66c49 81 return _bd->read(b, addr + _start, size);
dkato 0:f782d9c66c49 82 }
dkato 0:f782d9c66c49 83
dkato 0:f782d9c66c49 84 int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
dkato 0:f782d9c66c49 85 {
dkato 0:f782d9c66c49 86 MBED_ASSERT(is_valid_program(addr, size));
dkato 0:f782d9c66c49 87 return _bd->program(b, addr + _start, size);
dkato 0:f782d9c66c49 88 }
dkato 0:f782d9c66c49 89
dkato 0:f782d9c66c49 90 int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size)
dkato 0:f782d9c66c49 91 {
dkato 0:f782d9c66c49 92 MBED_ASSERT(is_valid_erase(addr, size));
dkato 0:f782d9c66c49 93 return _bd->erase(addr + _start, size);
dkato 0:f782d9c66c49 94 }
dkato 0:f782d9c66c49 95
dkato 0:f782d9c66c49 96 bd_size_t SlicingBlockDevice::get_read_size() const
dkato 0:f782d9c66c49 97 {
dkato 0:f782d9c66c49 98 return _bd->get_read_size();
dkato 0:f782d9c66c49 99 }
dkato 0:f782d9c66c49 100
dkato 0:f782d9c66c49 101 bd_size_t SlicingBlockDevice::get_program_size() const
dkato 0:f782d9c66c49 102 {
dkato 0:f782d9c66c49 103 return _bd->get_program_size();
dkato 0:f782d9c66c49 104 }
dkato 0:f782d9c66c49 105
dkato 0:f782d9c66c49 106 bd_size_t SlicingBlockDevice::get_erase_size() const
dkato 0:f782d9c66c49 107 {
dkato 0:f782d9c66c49 108 return _bd->get_erase_size();
dkato 0:f782d9c66c49 109 }
dkato 0:f782d9c66c49 110
dkato 0:f782d9c66c49 111 bd_size_t SlicingBlockDevice::size() const
dkato 0:f782d9c66c49 112 {
dkato 0:f782d9c66c49 113 return _stop - _start;
dkato 0:f782d9c66c49 114 }