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/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */ #ifndef LIBFDT_ENV_H #define LIBFDT_ENV_H /* * libfdt - Flat Device Tree manipulation * Copyright (C) 2006 David Gibson, IBM Corporation. * Copyright 2012 Kim Phillips, Freescale Semiconductor. */ #include <stdbool.h> #include <stddef.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <limits.h> #ifdef __CHECKER__ #define FDT_FORCE __attribute__((force)) #define FDT_BITWISE __attribute__((bitwise)) #else #define FDT_FORCE #define FDT_BITWISE #endif typedef uint16_t FDT_BITWISE fdt16_t; typedef uint32_t FDT_BITWISE fdt32_t; typedef uint64_t FDT_BITWISE fdt64_t; #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n]) #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1)) #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \ (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3)) #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \ (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \ (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \ (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7)) static inline uint16_t fdt16_to_cpu(fdt16_t x) { return (FDT_FORCE uint16_t)CPU_TO_FDT16(x); } static inline fdt16_t cpu_to_fdt16(uint16_t x) { return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x); } static inline uint32_t fdt32_to_cpu(fdt32_t x) { return (FDT_FORCE uint32_t)CPU_TO_FDT32(x); } static inline fdt32_t cpu_to_fdt32(uint32_t x) { return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x); } static inline uint64_t fdt64_to_cpu(fdt64_t x) { return (FDT_FORCE uint64_t)CPU_TO_FDT64(x); } static inline fdt64_t cpu_to_fdt64(uint64_t x) { return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x); } #undef CPU_TO_FDT64 #undef CPU_TO_FDT32 #undef CPU_TO_FDT16 #undef EXTRACT_BYTE #ifdef __APPLE__ #include <AvailabilityMacros.h> /* strnlen() is not available on Mac OS < 10.7 */ # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \ MAC_OS_X_VERSION_10_7) #define strnlen fdt_strnlen /* * fdt_strnlen: returns the length of a string or max_count - which ever is * smallest. * Input 1 string: the string whose size is to be determined * Input 2 max_count: the maximum value returned by this function * Output: length of the string or max_count (the smallest of the two) */ static inline size_t fdt_strnlen(const char *string, size_t max_count) { const char *p = memchr(string, 0, max_count); return p ? p - string : max_count; } #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7) */ #endif /* __APPLE__ */ #endif /* LIBFDT_ENV_H */
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