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