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https://github.com/AsahiLinux/u-boot
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91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
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/*
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* Copyright (c) Thomas Gleixner <tglx@linutronix.de>
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*
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* SPDX-License-Identifier: GPL 2.0+ BSD-3-Clause
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*/
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#ifndef __UBOOT_UBISPL_H
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#define __UBOOT_UBISPL_H
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/*
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* The following CONFIG options are relevant for UBISPL
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*
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* #define CONFIG_SPL_UBI_MAX_VOL_LEBS 256
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*
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* Defines the maximum number of logical erase blocks per loadable
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* (static) volume to size the ubispl internal arrays.
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*
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* #define CONFIG_SPL_UBI_MAX_PEB_SIZE (256*1024)
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*
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* Defines the maximum physical erase block size to size the fastmap
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* buffer for ubispl.
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*
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* #define CONFIG_SPL_UBI_MAX_PEBS 4096
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*
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* Define the maximum number of physical erase blocks to size the
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* ubispl internal arrays.
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*
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* #define CONFIG_SPL_UBI_VOL_IDS 8
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*
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* Defines the maximum number of volumes in which UBISPL is
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* interested. Limits the amount of memory for the scan data and
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* speeds up the scan process as we simply ignore stuff which we dont
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* want to load from the SPL anyway. So the volumes which can be
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* loaded in the above example are ids 0 - 7
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*/
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/*
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* The struct definition is in drivers/mtd/ubispl/ubispl.h. It does
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* not fit into the BSS due to the large buffer requirement of the
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* upstream fastmap code. So the caller of ubispl_load_volumes needs
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* to hand in a pointer to a free memory area where ubispl will place
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* its data. The area is not required to be initialized.
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*/
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struct ubi_scan_info;
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typedef int (*ubispl_read_flash)(int pnum, int offset, int len, void *dst);
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/**
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* struct ubispl_info - description structure for fast ubi scan
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* @ubi: Pointer to memory space for ubi scan info structure
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* @peb_size: Physical erase block size
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* @vid_offset: Offset of the VID header
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* @leb_start: Start of the logical erase block, i.e. offset of data
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* @peb_count: Number of physical erase blocks in the UBI FLASH area
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* aka MTD partition.
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* @peb_offset: Offset of PEB0 in the UBI FLASH area (aka MTD partition)
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* to the real start of the FLASH in erase blocks.
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* @fastmap: Enable fastmap attachment
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* @read: Read function to access the flash
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*/
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struct ubispl_info {
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struct ubi_scan_info *ubi;
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u32 peb_size;
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u32 vid_offset;
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u32 leb_start;
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u32 peb_count;
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u32 peb_offset;
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int fastmap;
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ubispl_read_flash read;
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};
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/**
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* struct ubispl_load - structure to describe a volume to load
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* @vol_id: Volume id
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* @load_addr: Load address of the volume
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*/
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struct ubispl_load {
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int vol_id;
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void *load_addr;
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};
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/**
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* ubispl_load_volumes - Scan flash and load volumes
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* @info: Pointer to the ubi scan info structure
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* @lovls: Pointer to array of volumes to load
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* @nrvols: Array size of @lovls
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*/
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int ubispl_load_volumes(struct ubispl_info *info,
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struct ubispl_load *lvols, int nrvols);
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#endif
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