83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
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*/
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/*
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* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef _SYS_ZAP_IMPL_H
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#define _SYS_ZAP_IMPL_H
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#define ZAP_MAGIC 0x2F52AB2ABULL
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#define ZAP_HASHBITS 28
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#define MZAP_ENT_LEN 64
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#define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2)
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#define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT
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#define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT)
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typedef struct mzap_ent_phys {
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uint64_t mze_value;
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uint32_t mze_cd;
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uint16_t mze_pad; /* in case we want to chain them someday */
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char mze_name[MZAP_NAME_LEN];
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} mzap_ent_phys_t;
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typedef struct mzap_phys {
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uint64_t mz_block_type; /* ZBT_MICRO */
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uint64_t mz_salt;
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uint64_t mz_pad[6];
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mzap_ent_phys_t mz_chunk[1];
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/* actually variable size depending on block size */
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} mzap_phys_t;
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/*
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* The (fat) zap is stored in one object. It is an array of
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* 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of:
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*
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* ptrtbl fits in first block:
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* [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ...
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*
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* ptrtbl too big for first block:
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* [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ...
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*
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*/
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#define ZBT_LEAF ((1ULL << 63) + 0)
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#define ZBT_HEADER ((1ULL << 63) + 1)
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#define ZBT_MICRO ((1ULL << 63) + 3)
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/* any other values are ptrtbl blocks */
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/*
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* the embedded pointer table takes up half a block:
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* block size / entry size (2^3) / 2
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*/
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#define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1)
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/*
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* The embedded pointer table starts half-way through the block. Since
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* the pointer table itself is half the block, it starts at (64-bit)
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* word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)).
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*/
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#define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \
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((uint64_t *)(zap)->zap_f.zap_phys) \
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[(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))]
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/*
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* TAKE NOTE:
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* If zap_phys_t is modified, zap_byteswap() must be modified.
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*/
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typedef struct zap_phys {
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uint64_t zap_block_type; /* ZBT_HEADER */
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uint64_t zap_magic; /* ZAP_MAGIC */
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struct zap_table_phys {
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uint64_t zt_blk; /* starting block number */
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uint64_t zt_numblks; /* number of blocks */
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uint64_t zt_shift; /* bits to index it */
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uint64_t zt_nextblk; /* next (larger) copy start block */
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uint64_t zt_blks_copied; /* number source blocks copied */
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} zap_ptrtbl;
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uint64_t zap_freeblk; /* the next free block */
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uint64_t zap_num_leafs; /* number of leafs */
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uint64_t zap_num_entries; /* number of entries */
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uint64_t zap_salt; /* salt to stir into hash function */
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uint64_t zap_normflags; /* flags for u8_textprep_str() */
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uint64_t zap_flags; /* zap_flag_t */
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/*
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* This structure is followed by padding, and then the embedded
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* pointer table. The embedded pointer table takes up second
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* half of the block. It is accessed using the
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* ZAP_EMBEDDED_PTRTBL_ENT() macro.
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*/
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} zap_phys_t;
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#endif /* _SYS_ZAP_IMPL_H */
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