cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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libfdt_env.h (2753B)

      1/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
      2#ifndef LIBFDT_ENV_H
      3#define LIBFDT_ENV_H
      4/*
      5 * libfdt - Flat Device Tree manipulation
      6 * Copyright (C) 2006 David Gibson, IBM Corporation.
      7 * Copyright 2012 Kim Phillips, Freescale Semiconductor.
      8 */
      9
     10#include <stdbool.h>
     11#include <stddef.h>
     12#include <stdint.h>
     13#include <stdlib.h>
     14#include <string.h>
     15#include <limits.h>
     16
     17#ifdef __CHECKER__
     18#define FDT_FORCE __attribute__((force))
     19#define FDT_BITWISE __attribute__((bitwise))
     20#else
     21#define FDT_FORCE
     22#define FDT_BITWISE
     23#endif
     24
     25typedef uint16_t FDT_BITWISE fdt16_t;
     26typedef uint32_t FDT_BITWISE fdt32_t;
     27typedef uint64_t FDT_BITWISE fdt64_t;
     28
     29#define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
     30#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
     31#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
     32			 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
     33#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
     34			 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
     35			 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
     36			 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
     37
     38static inline uint16_t fdt16_to_cpu(fdt16_t x)
     39{
     40	return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
     41}
     42static inline fdt16_t cpu_to_fdt16(uint16_t x)
     43{
     44	return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
     45}
     46
     47static inline uint32_t fdt32_to_cpu(fdt32_t x)
     48{
     49	return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
     50}
     51static inline fdt32_t cpu_to_fdt32(uint32_t x)
     52{
     53	return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
     54}
     55
     56static inline uint64_t fdt64_to_cpu(fdt64_t x)
     57{
     58	return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
     59}
     60static inline fdt64_t cpu_to_fdt64(uint64_t x)
     61{
     62	return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
     63}
     64#undef CPU_TO_FDT64
     65#undef CPU_TO_FDT32
     66#undef CPU_TO_FDT16
     67#undef EXTRACT_BYTE
     68
     69#ifdef __APPLE__
     70#include <AvailabilityMacros.h>
     71
     72/* strnlen() is not available on Mac OS < 10.7 */
     73# if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
     74                                         MAC_OS_X_VERSION_10_7)
     75
     76#define strnlen fdt_strnlen
     77
     78/*
     79 * fdt_strnlen: returns the length of a string or max_count - which ever is
     80 * smallest.
     81 * Input 1 string: the string whose size is to be determined
     82 * Input 2 max_count: the maximum value returned by this function
     83 * Output: length of the string or max_count (the smallest of the two)
     84 */
     85static inline size_t fdt_strnlen(const char *string, size_t max_count)
     86{
     87    const char *p = memchr(string, 0, max_count);
     88    return p ? p - string : max_count;
     89}
     90
     91#endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
     92          MAC_OS_X_VERSION_10_7) */
     93
     94#endif /* __APPLE__ */
     95
     96#endif /* LIBFDT_ENV_H */