Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/features/filesystem/bd/SlicingBlockDevice.cpp@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /* mbed Microcontroller Library
rahul_dahiya 0:fb8047b156bb 2 * Copyright (c) 2017 ARM Limited
rahul_dahiya 0:fb8047b156bb 3 *
rahul_dahiya 0:fb8047b156bb 4 * Licensed under the Apache License, Version 2.0 (the "License");
rahul_dahiya 0:fb8047b156bb 5 * you may not use this file except in compliance with the License.
rahul_dahiya 0:fb8047b156bb 6 * You may obtain a copy of the License at
rahul_dahiya 0:fb8047b156bb 7 *
rahul_dahiya 0:fb8047b156bb 8 * http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya 0:fb8047b156bb 9 *
rahul_dahiya 0:fb8047b156bb 10 * Unless required by applicable law or agreed to in writing, software
rahul_dahiya 0:fb8047b156bb 11 * distributed under the License is distributed on an "AS IS" BASIS,
rahul_dahiya 0:fb8047b156bb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya 0:fb8047b156bb 13 * See the License for the specific language governing permissions and
rahul_dahiya 0:fb8047b156bb 14 * limitations under the License.
rahul_dahiya 0:fb8047b156bb 15 */
rahul_dahiya 0:fb8047b156bb 16
rahul_dahiya 0:fb8047b156bb 17 #include "SlicingBlockDevice.h"
rahul_dahiya 0:fb8047b156bb 18
rahul_dahiya 0:fb8047b156bb 19
rahul_dahiya 0:fb8047b156bb 20 SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop)
rahul_dahiya 0:fb8047b156bb 21 : _bd(bd)
rahul_dahiya 0:fb8047b156bb 22 , _start_from_end(false), _start(start)
rahul_dahiya 0:fb8047b156bb 23 , _stop_from_end(false), _stop(stop)
rahul_dahiya 0:fb8047b156bb 24 {
rahul_dahiya 0:fb8047b156bb 25 if ((int64_t)_start < 0) {
rahul_dahiya 0:fb8047b156bb 26 _start_from_end = true;
rahul_dahiya 0:fb8047b156bb 27 _start = -_start;
rahul_dahiya 0:fb8047b156bb 28 }
rahul_dahiya 0:fb8047b156bb 29
rahul_dahiya 0:fb8047b156bb 30 if ((int64_t)_stop <= 0) {
rahul_dahiya 0:fb8047b156bb 31 _stop_from_end = true;
rahul_dahiya 0:fb8047b156bb 32 _stop = -_stop;
rahul_dahiya 0:fb8047b156bb 33 }
rahul_dahiya 0:fb8047b156bb 34 }
rahul_dahiya 0:fb8047b156bb 35
rahul_dahiya 0:fb8047b156bb 36 int SlicingBlockDevice::init()
rahul_dahiya 0:fb8047b156bb 37 {
rahul_dahiya 0:fb8047b156bb 38 int err = _bd->init();
rahul_dahiya 0:fb8047b156bb 39 if (err) {
rahul_dahiya 0:fb8047b156bb 40 return err;
rahul_dahiya 0:fb8047b156bb 41 }
rahul_dahiya 0:fb8047b156bb 42
rahul_dahiya 0:fb8047b156bb 43 bd_size_t size = _bd->size();
rahul_dahiya 0:fb8047b156bb 44
rahul_dahiya 0:fb8047b156bb 45 // Calculate from_end values
rahul_dahiya 0:fb8047b156bb 46 if (_start_from_end) {
rahul_dahiya 0:fb8047b156bb 47 _start_from_end = false;
rahul_dahiya 0:fb8047b156bb 48 _start = size - _start;
rahul_dahiya 0:fb8047b156bb 49 }
rahul_dahiya 0:fb8047b156bb 50
rahul_dahiya 0:fb8047b156bb 51 if (_stop_from_end) {
rahul_dahiya 0:fb8047b156bb 52 _stop_from_end = false;
rahul_dahiya 0:fb8047b156bb 53 _stop = size - _stop;
rahul_dahiya 0:fb8047b156bb 54 }
rahul_dahiya 0:fb8047b156bb 55
rahul_dahiya 0:fb8047b156bb 56 // Check that block addresses are valid
rahul_dahiya 0:fb8047b156bb 57 MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start));
rahul_dahiya 0:fb8047b156bb 58
rahul_dahiya 0:fb8047b156bb 59 return 0;
rahul_dahiya 0:fb8047b156bb 60 }
rahul_dahiya 0:fb8047b156bb 61
rahul_dahiya 0:fb8047b156bb 62 int SlicingBlockDevice::deinit()
rahul_dahiya 0:fb8047b156bb 63 {
rahul_dahiya 0:fb8047b156bb 64 return _bd->deinit();
rahul_dahiya 0:fb8047b156bb 65 }
rahul_dahiya 0:fb8047b156bb 66
rahul_dahiya 0:fb8047b156bb 67 int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
rahul_dahiya 0:fb8047b156bb 68 {
rahul_dahiya 0:fb8047b156bb 69 MBED_ASSERT(is_valid_read(addr, size));
rahul_dahiya 0:fb8047b156bb 70 return _bd->read(b, addr + _start, size);
rahul_dahiya 0:fb8047b156bb 71 }
rahul_dahiya 0:fb8047b156bb 72
rahul_dahiya 0:fb8047b156bb 73 int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
rahul_dahiya 0:fb8047b156bb 74 {
rahul_dahiya 0:fb8047b156bb 75 MBED_ASSERT(is_valid_program(addr, size));
rahul_dahiya 0:fb8047b156bb 76 return _bd->program(b, addr + _start, size);
rahul_dahiya 0:fb8047b156bb 77 }
rahul_dahiya 0:fb8047b156bb 78
rahul_dahiya 0:fb8047b156bb 79 int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size)
rahul_dahiya 0:fb8047b156bb 80 {
rahul_dahiya 0:fb8047b156bb 81 MBED_ASSERT(is_valid_erase(addr, size));
rahul_dahiya 0:fb8047b156bb 82 return _bd->erase(addr + _start, size);
rahul_dahiya 0:fb8047b156bb 83 }
rahul_dahiya 0:fb8047b156bb 84
rahul_dahiya 0:fb8047b156bb 85 bd_size_t SlicingBlockDevice::get_read_size() const
rahul_dahiya 0:fb8047b156bb 86 {
rahul_dahiya 0:fb8047b156bb 87 return _bd->get_read_size();
rahul_dahiya 0:fb8047b156bb 88 }
rahul_dahiya 0:fb8047b156bb 89
rahul_dahiya 0:fb8047b156bb 90 bd_size_t SlicingBlockDevice::get_program_size() const
rahul_dahiya 0:fb8047b156bb 91 {
rahul_dahiya 0:fb8047b156bb 92 return _bd->get_program_size();
rahul_dahiya 0:fb8047b156bb 93 }
rahul_dahiya 0:fb8047b156bb 94
rahul_dahiya 0:fb8047b156bb 95 bd_size_t SlicingBlockDevice::get_erase_size() const
rahul_dahiya 0:fb8047b156bb 96 {
rahul_dahiya 0:fb8047b156bb 97 return _bd->get_erase_size();
rahul_dahiya 0:fb8047b156bb 98 }
rahul_dahiya 0:fb8047b156bb 99
rahul_dahiya 0:fb8047b156bb 100 bd_size_t SlicingBlockDevice::size() const
rahul_dahiya 0:fb8047b156bb 101 {
rahul_dahiya 0:fb8047b156bb 102 return _stop - _start;
rahul_dahiya 0:fb8047b156bb 103 }