mirror of https://github.com/ARMmbed/mbed-os.git
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "SlicingBlockDevice.h"
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#include "platform/mbed_assert.h"
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namespace mbed {
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SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop)
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: _bd(bd)
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, _start_from_end(false), _start(start)
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, _stop_from_end(false), _stop(stop)
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{
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if ((int64_t)_start < 0) {
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_start_from_end = true;
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_start = -_start;
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}
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if ((int64_t)_stop <= 0) {
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_stop_from_end = true;
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_stop = -_stop;
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}
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}
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int SlicingBlockDevice::init()
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{
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int err = _bd->init();
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if (err) {
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return err;
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}
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bd_size_t size = _bd->size();
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// Calculate from_end values
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if (_start_from_end) {
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_start_from_end = false;
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_start = size - _start;
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}
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if (_stop_from_end) {
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_stop_from_end = false;
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_stop = size - _stop;
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}
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// Check that block addresses are valid
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MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start));
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return 0;
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}
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int SlicingBlockDevice::deinit()
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{
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return _bd->deinit();
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}
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int SlicingBlockDevice::sync()
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{
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return _bd->sync();
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}
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int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
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{
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MBED_ASSERT(is_valid_read(addr, size));
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return _bd->read(b, addr + _start, size);
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}
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int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
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{
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MBED_ASSERT(is_valid_program(addr, size));
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return _bd->program(b, addr + _start, size);
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}
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int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size)
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{
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MBED_ASSERT(is_valid_erase(addr, size));
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return _bd->erase(addr + _start, size);
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}
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bd_size_t SlicingBlockDevice::get_read_size() const
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{
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return _bd->get_read_size();
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}
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bd_size_t SlicingBlockDevice::get_program_size() const
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{
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return _bd->get_program_size();
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}
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bd_size_t SlicingBlockDevice::get_erase_size() const
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{
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return _bd->get_erase_size();
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}
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bd_size_t SlicingBlockDevice::get_erase_size(bd_addr_t addr) const
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{
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return _bd->get_erase_size(_start + addr);
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}
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int SlicingBlockDevice::get_erase_value() const
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{
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return _bd->get_erase_value();
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}
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bd_size_t SlicingBlockDevice::size() const
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{
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return _stop - _start;
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}
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} // namespace mbed
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