| # |
| # Copyright (c) 2018 Bobby Noelte |
| # |
| # SPDX-License-Identifier: Apache-2.0 |
| # |
| |
| from extract.globals import * |
| from extract.directive import DTDirective |
| |
| from extract.default import default |
| from extract.reg import reg |
| |
| ## |
| # @brief Manage flash directives. |
| # |
| class DTFlash(DTDirective): |
| |
| def __init__(self): |
| # Node of the flash |
| self._flash_node = None |
| self._flash_area = {} |
| |
| def _extract_partition(self, node_address): |
| prop_def = {} |
| prop_alias = {} |
| node = reduced[node_address] |
| |
| partition_name = node['props']['label'] |
| partition_sectors = node['props']['reg'] |
| |
| # Build Index based partition IDs |
| if node_address in self._flash_area: |
| area_id = self._flash_area[node_address]["id"] |
| else: |
| area_id = len(self._flash_area) |
| self._flash_area[node_address] = {'id': area_id } |
| partition_idx = str(area_id) |
| |
| # Extract a per partition dev name, something like: |
| # #define DT_FLASH_AREA_1_DEV "FLASH_CTRL" |
| |
| # For now assume node_address is something like: |
| # /flash-controller@4001E000/flash@0/partitions/partition@fc000 |
| # and we go up 3 levels to get the controller |
| ctrl_addr = '/' + '/'.join(node_address.split('/')[1:-3]) |
| |
| node = reduced[ctrl_addr] |
| name = "\"{}\"".format(node['props']['label']) |
| |
| for area in self._flash_area.keys(): |
| if ctrl_addr in area: |
| label = self.get_label_string(["DT_FLASH_AREA", partition_idx, "DEV"]) |
| prop_def[label] = name |
| |
| label = self.get_label_string(["DT_FLASH_AREA"] + [partition_name] + ["ID",]) |
| prop_def[label] = area_id |
| |
| label_prefix = ["DT_FLASH_AREA", partition_idx] |
| |
| index = 0 |
| while index < len(partition_sectors): |
| sector_index = int(index/2) |
| sector_start_offset = partition_sectors[index] |
| sector_size = partition_sectors[index + 1] |
| label = self.get_label_string( |
| label_prefix + ["OFFSET", str(sector_index)]) |
| prop_def[label] = "{}".format(sector_start_offset) |
| label = self.get_label_string( |
| label_prefix + ["SIZE", str(sector_index)]) |
| prop_def[label] = "{}".format(sector_size) |
| index += 2 |
| |
| # alias sector 0 |
| label = self.get_label_string(label_prefix + ["OFFSET",]) |
| prop_alias[label] = self.get_label_string( |
| label_prefix + ["OFFSET", '0']) |
| label = self.get_label_string(label_prefix + ["SIZE",]) |
| prop_alias[label] = self.get_label_string( |
| label_prefix + ["SIZE", '0']) |
| |
| label = self.get_label_string(["DT_FLASH_AREA", partition_idx, "LABEL"]) |
| prop_def[label] = self.get_label_string([partition_name,]) |
| |
| prop_def["DT_FLASH_AREA_NUM"] = len(self._flash_area) |
| |
| insert_defs("DT_FLASH_AREA", prop_def, prop_alias) |
| |
| def extract_partition(self, node_address): |
| prop_def = {} |
| prop_alias = {} |
| node = reduced[node_address] |
| |
| self._extract_partition(node_address) |
| |
| partition_name = node['props']['label'] |
| partition_sectors = node['props']['reg'] |
| |
| label_prefix = ["FLASH_AREA", partition_name] |
| label = self.get_label_string(label_prefix + ["LABEL",]) |
| prop_def[label] = '"{}"'.format(partition_name) |
| |
| label = self.get_label_string(label_prefix + ["READ_ONLY",]) |
| prop_def[label] = 1 if 'read-only' in node['props'] else 0 |
| |
| index = 0 |
| while index < len(partition_sectors): |
| sector_index = int(index/2) |
| sector_start_offset = partition_sectors[index] |
| sector_size = partition_sectors[index + 1] |
| label = self.get_label_string( |
| label_prefix + ["OFFSET", str(sector_index)]) |
| prop_def[label] = "{}".format(sector_start_offset) |
| label = self.get_label_string( |
| label_prefix + ["SIZE", str(sector_index)]) |
| prop_def[label] = "{}".format(sector_size) |
| index += 2 |
| # alias sector 0 |
| label = self.get_label_string(label_prefix + ["OFFSET",]) |
| prop_alias[label] = self.get_label_string( |
| label_prefix + ["OFFSET", '0']) |
| label = self.get_label_string(label_prefix + ["SIZE",]) |
| prop_alias[label] = self.get_label_string( |
| label_prefix + ["SIZE", '0']) |
| |
| insert_defs(node_address, prop_def, prop_alias) |
| |
| def _extract_flash(self, node_address, prop, def_label): |
| if node_address == 'dummy-flash': |
| # We will add addr/size of 0 for systems with no flash controller |
| # This is what they already do in the Kconfig options anyway |
| insert_defs(node_address, |
| {'DT_FLASH_BASE_ADDRESS': 0, 'DT_FLASH_SIZE': 0}, |
| {}) |
| self._flash_base_address = 0 |
| return |
| |
| self._flash_node = reduced[node_address] |
| orig_node_addr = node_address |
| |
| (nr_address_cells, nr_size_cells) = get_addr_size_cells(node_address) |
| # if the nr_size_cells is 0, assume a SPI flash, need to look at parent |
| # for addr/size info, and the second reg property (assume first is mmio |
| # register for the controller itself) |
| is_spi_flash = False |
| if nr_size_cells == 0: |
| is_spi_flash = True |
| node_address = get_parent_address(node_address) |
| (nr_address_cells, nr_size_cells) = get_addr_size_cells(node_address) |
| |
| node_compat = get_compat(node_address) |
| reg = reduced[node_address]['props']['reg'] |
| if type(reg) is not list: reg = [ reg, ] |
| props = list(reg) |
| |
| num_reg_elem = len(props)/(nr_address_cells + nr_size_cells) |
| |
| # if we found a spi flash, but don't have mmio direct access support |
| # which we determin by the spi controller node only have on reg element |
| # (ie for the controller itself and no region for the MMIO flash access) |
| if num_reg_elem == 1 and is_spi_flash: |
| node_address = orig_node_addr |
| else: |
| # We assume the last reg property is the one we want |
| while props: |
| addr = 0 |
| size = 0 |
| |
| for x in range(nr_address_cells): |
| addr += props.pop(0) << (32 * (nr_address_cells - x - 1)) |
| for x in range(nr_size_cells): |
| size += props.pop(0) << (32 * (nr_size_cells - x - 1)) |
| |
| addr += translate_addr(addr, node_address, nr_address_cells, |
| nr_size_cells) |
| |
| insert_defs(node_address, |
| {'DT_FLASH_BASE_ADDRESS': hex(addr), |
| 'DT_FLASH_SIZE': size//1024}, |
| {}) |
| |
| for prop in 'label', 'write-block-size', 'erase-block-size': |
| if prop in self._flash_node['props']: |
| default.extract(node_address, prop, None, def_label) |
| |
| def _extract_code_partition(self, node_address, prop, def_label): |
| if node_address == 'dummy-flash': |
| node = None |
| else: |
| node = reduced[node_address] |
| if self._flash_node is None: |
| # No flash node scanned before- |
| raise Exception( |
| "Code partition '{}' {} without flash definition." |
| .format(prop, node_address)) |
| |
| if node and node is not self._flash_node: |
| # only compute the load offset if the code partition |
| # is not the same as the flash base address |
| load_offset = node['props']['reg'][0] |
| load_size = node['props']['reg'][1] |
| else: |
| load_offset = 0 |
| load_size = 0 |
| |
| insert_defs(node_address, |
| {'DT_CODE_PARTITION_OFFSET': load_offset, |
| 'DT_CODE_PARTITION_SIZE': load_size}, |
| {}) |
| |
| ## |
| # @brief Extract flash |
| # |
| # @param node_address Address of node owning the |
| # flash definition. |
| # @param prop compatible property name |
| # @param def_label Define label string of node owning the |
| # compatible definition. |
| # |
| def extract(self, node_address, prop, def_label): |
| |
| if prop == 'zephyr,flash': |
| # indicator for flash |
| self._extract_flash(node_address, prop, def_label) |
| elif prop == 'zephyr,code-partition': |
| # indicator for code_partition |
| self._extract_code_partition(node_address, prop, def_label) |
| else: |
| raise Exception( |
| "DTFlash.extract called with unexpected directive ({})." |
| .format(prop)) |
| ## |
| # @brief Management information for flash. |
| flash = DTFlash() |
