| Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) Thomas Gleixner <tglx@linutronix.de> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL 2.0+ BSD-3-Clause |
| 5 | */ |
| 6 | #ifndef __UBOOT_UBISPL_H |
| 7 | #define __UBOOT_UBISPL_H |
| 8 | |
| 9 | /* |
| 10 | * The following CONFIG options are relevant for UBISPL |
| 11 | * |
| 12 | * #define CONFIG_SPL_UBI_MAX_VOL_LEBS 256 |
| 13 | * |
| 14 | * Defines the maximum number of logical erase blocks per loadable |
| 15 | * (static) volume to size the ubispl internal arrays. |
| 16 | * |
| 17 | * #define CONFIG_SPL_UBI_MAX_PEB_SIZE (256*1024) |
| 18 | * |
| 19 | * Defines the maximum physical erase block size to size the fastmap |
| 20 | * buffer for ubispl. |
| 21 | * |
| 22 | * #define CONFIG_SPL_UBI_MAX_PEBS 4096 |
| 23 | * |
| 24 | * Define the maximum number of physical erase blocks to size the |
| 25 | * ubispl internal arrays. |
| 26 | * |
| 27 | * #define CONFIG_SPL_UBI_VOL_IDS 8 |
| 28 | * |
| 29 | * Defines the maximum number of volumes in which UBISPL is |
| 30 | * interested. Limits the amount of memory for the scan data and |
| 31 | * speeds up the scan process as we simply ignore stuff which we dont |
| 32 | * want to load from the SPL anyway. So the volumes which can be |
| 33 | * loaded in the above example are ids 0 - 7 |
| 34 | */ |
| 35 | |
| 36 | /* |
| 37 | * The struct definition is in drivers/mtd/ubispl/ubispl.h. It does |
| 38 | * not fit into the BSS due to the large buffer requirement of the |
| 39 | * upstream fastmap code. So the caller of ubispl_load_volumes needs |
| 40 | * to hand in a pointer to a free memory area where ubispl will place |
| 41 | * its data. The area is not required to be initialized. |
| 42 | */ |
| 43 | struct ubi_scan_info; |
| 44 | |
| 45 | typedef int (*ubispl_read_flash)(int pnum, int offset, int len, void *dst); |
| 46 | |
| 47 | /** |
| 48 | * struct ubispl_info - description structure for fast ubi scan |
| 49 | * @ubi: Pointer to memory space for ubi scan info structure |
| 50 | * @peb_size: Physical erase block size |
| 51 | * @vid_offset: Offset of the VID header |
| 52 | * @leb_start: Start of the logical erase block, i.e. offset of data |
| 53 | * @peb_count: Number of physical erase blocks in the UBI FLASH area |
| 54 | * aka MTD partition. |
| 55 | * @peb_offset: Offset of PEB0 in the UBI FLASH area (aka MTD partition) |
| 56 | * to the real start of the FLASH in erase blocks. |
| 57 | * @fastmap: Enable fastmap attachment |
| 58 | * @read: Read function to access the flash |
| 59 | */ |
| 60 | struct ubispl_info { |
| 61 | struct ubi_scan_info *ubi; |
| 62 | u32 peb_size; |
| 63 | u32 vid_offset; |
| 64 | u32 leb_start; |
| 65 | u32 peb_count; |
| 66 | u32 peb_offset; |
| 67 | int fastmap; |
| 68 | ubispl_read_flash read; |
| 69 | }; |
| 70 | |
| 71 | /** |
| 72 | * struct ubispl_load - structure to describe a volume to load |
| 73 | * @vol_id: Volume id |
| 74 | * @load_addr: Load address of the volume |
| 75 | */ |
| 76 | struct ubispl_load { |
| 77 | int vol_id; |
| 78 | void *load_addr; |
| 79 | }; |
| 80 | |
| 81 | /** |
| 82 | * ubispl_load_volumes - Scan flash and load volumes |
| 83 | * @info: Pointer to the ubi scan info structure |
| 84 | * @lovls: Pointer to array of volumes to load |
| 85 | * @nrvols: Array size of @lovls |
| 86 | */ |
| 87 | int ubispl_load_volumes(struct ubispl_info *info, |
| 88 | struct ubispl_load *lvols, int nrvols); |
| 89 | |
| 90 | #endif |