Nicolas Borla
/
BBR_1Ebene
BBR 1 Ebene
Diff: mbed-os/features/filesystem/bd/SlicingBlockDevice.cpp
- Revision:
- 0:fbdae7e6d805
diff -r 000000000000 -r fbdae7e6d805 mbed-os/features/filesystem/bd/SlicingBlockDevice.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/features/filesystem/bd/SlicingBlockDevice.cpp Mon May 14 11:29:06 2018 +0000 @@ -0,0 +1,118 @@ +/* mbed Microcontroller Library + * Copyright (c) 2017 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "SlicingBlockDevice.h" + + +SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop) + : _bd(bd) + , _start_from_end(false), _start(start) + , _stop_from_end(false), _stop(stop) +{ + if ((int64_t)_start < 0) { + _start_from_end = true; + _start = -_start; + } + + if ((int64_t)_stop <= 0) { + _stop_from_end = true; + _stop = -_stop; + } +} + +int SlicingBlockDevice::init() +{ + int err = _bd->init(); + if (err) { + return err; + } + + bd_size_t size = _bd->size(); + + // Calculate from_end values + if (_start_from_end) { + _start_from_end = false; + _start = size - _start; + } + + if (_stop_from_end) { + _stop_from_end = false; + _stop = size - _stop; + } + + // Check that block addresses are valid + MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start)); + + return 0; +} + +int SlicingBlockDevice::deinit() +{ + return _bd->deinit(); +} + +int SlicingBlockDevice::sync() +{ + return _bd->sync(); +} + +int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size) +{ + MBED_ASSERT(is_valid_read(addr, size)); + return _bd->read(b, addr + _start, size); +} + +int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size) +{ + MBED_ASSERT(is_valid_program(addr, size)); + return _bd->program(b, addr + _start, size); +} + +int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size) +{ + MBED_ASSERT(is_valid_erase(addr, size)); + return _bd->erase(addr + _start, size); +} + +bd_size_t SlicingBlockDevice::get_read_size() const +{ + return _bd->get_read_size(); +} + +bd_size_t SlicingBlockDevice::get_program_size() const +{ + return _bd->get_program_size(); +} + +bd_size_t SlicingBlockDevice::get_erase_size() const +{ + return _bd->get_erase_size(); +} + +bd_size_t SlicingBlockDevice::get_erase_size(bd_addr_t addr) const +{ + return _bd->get_erase_size(_start + addr); +} + +int SlicingBlockDevice::get_erase_value() const +{ + return _bd->get_erase_value(); +} + +bd_size_t SlicingBlockDevice::size() const +{ + return _stop - _start; +}