/* SPDX-License-Identifier: GPL-2.0-only */ /* This file is for "nuisance prototypes" that have no other home. */ #ifndef __LIB_H__ #define __LIB_H__ #include <types.h> /* Defined in src/lib/lzma.c. Returns decompressed size or 0 on error. */ size_t ulzman(const void *src, size_t srcn, void *dst, size_t dstn); /* Defined in src/lib/ramtest.c */ /* Assumption is 32-bit addressable UC memory. */ void ram_check(uintptr_t start); int ram_check_nodie(uintptr_t start); int ram_check_noprint_nodie(uintptr_t start); void quick_ram_check_or_die(uintptr_t dst); /* Defined in primitive_memtest.c */ int primitive_memtest(uintptr_t base, uintptr_t size); /* Defined in src/lib/stack.c */ int checkstack(void *top_of_stack, int core); /* * Defined in src/lib/hexdump.c * Use the Linux command "xxd" for matching output. xxd is found in package * https://packages.debian.org/jessie/amd64/vim-common/filelist */ void hexdump(const void *memory, size_t length); /* * hexstrtobin - Turn a string of ASCII hex characters into binary * * @str: String of hex characters to parse * @buf: Buffer to store the resulting bytes into * @len: Maximum length of buffer to fill * * Defined in src/lib/hexstrtobin.c * Ignores non-hex characters in the string. * Ignores the last hex character if the number of hex characters in the string * is odd. * Returns the number of bytes that have been put in the buffer. */ size_t hexstrtobin(const char *str, uint8_t *buf, size_t len); /* Population Count: number of bits that are one */ static inline int popcnt(u32 x) { return __builtin_popcount(x); } /* Count Leading Zeroes: clz(0) == 32, clz(0xf) == 28, clz(1 << 31) == 0 */ static inline int clz(u32 x) { return x ? __builtin_clz(x) : sizeof(x) * 8; } /* Integer binary logarithm (rounding down): log2(0) == -1, log2(5) == 2 */ static inline int log2(u32 x) { return sizeof(x) * 8 - clz(x) - 1; } /* Find First Set: __ffs(1) == 0, __ffs(0) == -1, __ffs(1<<31) == 31 */ static inline int __ffs(u32 x) { return log2(x & (u32)(-(s32)x)); } /* Find Last Set: __fls(1) == 0, __fls(5) == 2, __fls(1 << 31) == 31 */ static inline int __fls(u32 x) { return log2(x); } /* Integer binary logarithm (rounding up): log2_ceil(0) == -1, log2_ceil(5) == 3 */ static inline int log2_ceil(u32 x) { return (x == 0) ? -1 : log2(x - 1) + 1; } static inline int popcnt64(u64 x) { return __builtin_popcountll(x); } static inline int clz64(u64 x) { return x ? __builtin_clzll(x) : sizeof(x) * 8; } static inline int log2_64(u64 x) { return sizeof(x) * 8 - clz64(x) - 1; } static inline int __ffs64(u64 x) { return log2_64(x & (u64)(-(s64)x)); } static inline int __fls64(u64 x) { return log2_64(x); } #endif /* __LIB_H__ */