projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 4d3c95f5 JL |
2 | /* |
| 3 | * GRUB -- GRand Unified Bootloader | |
| 4 | * Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. | |
| 4d3c95f5 JL |
5 | */ |
| 6 | /* | |
| 7 | * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _SYS_ZAP_IMPL_H | |
| 11 | #define _SYS_ZAP_IMPL_H | |
| 12 | ||
| 13 | #define ZAP_MAGIC 0x2F52AB2ABULL | |
| 14 | ||
| 15 | #define ZAP_HASHBITS 28 | |
| 16 | #define MZAP_ENT_LEN 64 | |
| 17 | #define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2) | |
| 18 | #define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT | |
| 19 | #define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT) | |
| 20 | ||
| 21 | typedef struct mzap_ent_phys { | |
| 22 | uint64_t mze_value; | |
| 23 | uint32_t mze_cd; | |
| 24 | uint16_t mze_pad; /* in case we want to chain them someday */ | |
| 25 | char mze_name[MZAP_NAME_LEN]; | |
| 26 | } mzap_ent_phys_t; | |
| 27 | ||
| 28 | typedef struct mzap_phys { | |
| 29 | uint64_t mz_block_type; /* ZBT_MICRO */ | |
| 30 | uint64_t mz_salt; | |
| 31 | uint64_t mz_pad[6]; | |
| 32 | mzap_ent_phys_t mz_chunk[1]; | |
| 33 | /* actually variable size depending on block size */ | |
| 34 | } mzap_phys_t; | |
| 35 | ||
| 36 | /* | |
| 37 | * The (fat) zap is stored in one object. It is an array of | |
| 38 | * 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of: | |
| 39 | * | |
| 40 | * ptrtbl fits in first block: | |
| 41 | * [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ... | |
| 42 | * | |
| 43 | * ptrtbl too big for first block: | |
| 44 | * [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ... | |
| 45 | * | |
| 46 | */ | |
| 47 | ||
| 48 | #define ZBT_LEAF ((1ULL << 63) + 0) | |
| 49 | #define ZBT_HEADER ((1ULL << 63) + 1) | |
| 50 | #define ZBT_MICRO ((1ULL << 63) + 3) | |
| 51 | /* any other values are ptrtbl blocks */ | |
| 52 | ||
| 53 | /* | |
| 54 | * the embedded pointer table takes up half a block: | |
| 55 | * block size / entry size (2^3) / 2 | |
| 56 | */ | |
| 57 | #define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1) | |
| 58 | ||
| 59 | /* | |
| 60 | * The embedded pointer table starts half-way through the block. Since | |
| 61 | * the pointer table itself is half the block, it starts at (64-bit) | |
| 62 | * word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)). | |
| 63 | */ | |
| 64 | #define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \ | |
| 65 | ((uint64_t *)(zap)->zap_f.zap_phys) \ | |
| 66 | [(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))] | |
| 67 | ||
| 68 | /* | |
| 69 | * TAKE NOTE: | |
| 70 | * If zap_phys_t is modified, zap_byteswap() must be modified. | |
| 71 | */ | |
| 72 | typedef struct zap_phys { | |
| 73 | uint64_t zap_block_type; /* ZBT_HEADER */ | |
| 74 | uint64_t zap_magic; /* ZAP_MAGIC */ | |
| 75 | ||
| 76 | struct zap_table_phys { | |
| 77 | uint64_t zt_blk; /* starting block number */ | |
| 78 | uint64_t zt_numblks; /* number of blocks */ | |
| 79 | uint64_t zt_shift; /* bits to index it */ | |
| 80 | uint64_t zt_nextblk; /* next (larger) copy start block */ | |
| 81 | uint64_t zt_blks_copied; /* number source blocks copied */ | |
| 82 | } zap_ptrtbl; | |
| 83 | ||
| 84 | uint64_t zap_freeblk; /* the next free block */ | |
| 85 | uint64_t zap_num_leafs; /* number of leafs */ | |
| 86 | uint64_t zap_num_entries; /* number of entries */ | |
| 87 | uint64_t zap_salt; /* salt to stir into hash function */ | |
| 88 | uint64_t zap_normflags; /* flags for u8_textprep_str() */ | |
| 89 | uint64_t zap_flags; /* zap_flag_t */ | |
| 90 | /* | |
| 91 | * This structure is followed by padding, and then the embedded | |
| 92 | * pointer table. The embedded pointer table takes up second | |
| 93 | * half of the block. It is accessed using the | |
| 94 | * ZAP_EMBEDDED_PTRTBL_ENT() macro. | |
| 95 | */ | |
| 96 | } zap_phys_t; | |
| 97 | ||
| 98 | #endif /* _SYS_ZAP_IMPL_H */ |