vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Generic binary BCH encoding/decoding library
|
|
*
|
|
* Copyright © 2011 Parrot S.A.
|
|
*
|
|
* Author: Ivan Djelic <ivan.djelic@parrot.com>
|
|
*
|
|
* Description:
|
|
*
|
|
* This library provides runtime configurable encoding/decoding of binary
|
|
* Bose-Chaudhuri-Hocquenghem (BCH) codes.
|
|
*/
|
|
#ifndef _BCH_H
|
|
#define _BCH_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/**
|
|
* struct bch_control - BCH control structure
|
|
* @m: Galois field order
|
|
* @n: maximum codeword size in bits (= 2^m-1)
|
|
* @t: error correction capability in bits
|
|
* @ecc_bits: ecc exact size in bits, i.e. generator polynomial degree (<=m*t)
|
|
* @ecc_bytes: ecc max size (m*t bits) in bytes
|
|
* @a_pow_tab: Galois field GF(2^m) exponentiation lookup table
|
|
* @a_log_tab: Galois field GF(2^m) log lookup table
|
|
* @mod8_tab: remainder generator polynomial lookup tables
|
|
* @ecc_buf: ecc parity words buffer
|
|
* @ecc_buf2: ecc parity words buffer
|
|
* @xi_tab: GF(2^m) base for solving degree 2 polynomial roots
|
|
* @syn: syndrome buffer
|
|
* @cache: log-based polynomial representation buffer
|
|
* @elp: error locator polynomial
|
|
* @poly_2t: temporary polynomials of degree 2t
|
|
* @swap_bits: swap bits within data and syndrome bytes
|
|
*/
|
|
struct bch_control {
|
|
unsigned int m;
|
|
unsigned int n;
|
|
unsigned int t;
|
|
unsigned int ecc_bits;
|
|
unsigned int ecc_bytes;
|
|
/* private: */
|
|
uint16_t *a_pow_tab;
|
|
uint16_t *a_log_tab;
|
|
uint32_t *mod8_tab;
|
|
uint32_t *ecc_buf;
|
|
uint32_t *ecc_buf2;
|
|
unsigned int *xi_tab;
|
|
unsigned int *syn;
|
|
int *cache;
|
|
struct gf_poly *elp;
|
|
struct gf_poly *poly_2t[4];
|
|
bool swap_bits;
|
|
};
|
|
|
|
struct bch_control *bch_init(int m, int t, unsigned int prim_poly,
|
|
bool swap_bits);
|
|
|
|
void bch_free(struct bch_control *bch);
|
|
|
|
void bch_encode(struct bch_control *bch, const uint8_t *data,
|
|
unsigned int len, uint8_t *ecc);
|
|
|
|
int bch_decode(struct bch_control *bch, const uint8_t *data, unsigned int len,
|
|
const uint8_t *recv_ecc, const uint8_t *calc_ecc,
|
|
const unsigned int *syn, unsigned int *errloc);
|
|
|
|
#endif /* _BCH_H */
|