| David Vincze | cea8b59 | 2019-10-29 16:09:51 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * Original code taken from mcuboot project at: |
| 22 | * https://github.com/JuulLabs-OSS/mcuboot |
| 23 | * Git SHA of the original version: 4f0ea747c314547daa6b6299ccbd77ae4dee6758 |
| 24 | * Modifications are Copyright (c) 2019 Arm Limited. |
| 25 | */ |
| 26 | |
| 27 | #include "bootutil/bootutil_log.h" |
| 28 | #include "flash_map/flash_map.h" |
| 29 | #include <inttypes.h> |
| 30 | #include <target.h> |
| 31 | |
| 32 | /* |
| 33 | * Lookup the sector map for a given flash area. This should fill in |
| 34 | * `ret` with all of the sectors in the area. `*cnt` will be set to |
| 35 | * the storage at `ret` and should be set to the final number of |
| 36 | * sectors in this area. |
| 37 | */ |
| 38 | int flash_area_get_sectors(int idx, uint32_t *cnt, struct flash_sector *ret) |
| 39 | { |
| 40 | const struct flash_area *fa; |
| 41 | uint32_t max_cnt = *cnt; |
| 42 | uint32_t rem_len; |
| 43 | int rc = -1; |
| 44 | |
| 45 | if (flash_area_open(idx, &fa)) { |
| 46 | goto out; |
| 47 | } |
| 48 | |
| 49 | BOOT_LOG_DBG("area %d: offset=0x%x, length=0x%x", idx, fa->fa_off, |
| 50 | fa->fa_size); |
| 51 | |
| 52 | if (*cnt < 1) { |
| 53 | goto fa_close_out; |
| 54 | } |
| 55 | |
| 56 | rem_len = fa->fa_size; |
| 57 | *cnt = 0; |
| 58 | while (rem_len > 0 && *cnt < max_cnt) { |
| 59 | if (rem_len < FLASH_AREA_IMAGE_SECTOR_SIZE) { |
| 60 | BOOT_LOG_ERR("area %d size 0x%x not divisible by sector size 0x%x", |
| 61 | idx, fa->fa_size, FLASH_AREA_IMAGE_SECTOR_SIZE); |
| 62 | goto fa_close_out; |
| 63 | } |
| 64 | |
| 65 | ret[*cnt].fs_off = FLASH_AREA_IMAGE_SECTOR_SIZE * (*cnt); |
| 66 | ret[*cnt].fs_size = FLASH_AREA_IMAGE_SECTOR_SIZE; |
| 67 | *cnt = *cnt + 1; |
| 68 | rem_len -= FLASH_AREA_IMAGE_SECTOR_SIZE; |
| 69 | } |
| 70 | |
| 71 | if (*cnt > max_cnt) { |
| 72 | BOOT_LOG_ERR("flash area %d sector count overflow", idx); |
| 73 | goto fa_close_out; |
| 74 | } |
| 75 | |
| 76 | rc = 0; |
| 77 | |
| 78 | fa_close_out: |
| 79 | flash_area_close(fa); |
| 80 | out: |
| 81 | return rc; |
| 82 | } |