1  /* SPDX-License-Identifier: GPL-2.0-or-later */
  2  
  3  #ifndef _ENDIAN_H_
  4  #define _ENDIAN_H_
  5  
  6  #include <arch/byteorder.h>
  7  #include <stdint.h>
  8  #include <swab.h>
  9  
 10  #if defined(__LITTLE_ENDIAN)
 11  	#define cpu_to_le64(x) ((uint64_t)(x))
 12  	#define le64_to_cpu(x) ((uint64_t)(x))
 13  	#define cpu_to_le32(x) ((uint32_t)(x))
 14  	#define le32_to_cpu(x) ((uint32_t)(x))
 15  	#define cpu_to_le16(x) ((uint16_t)(x))
 16  	#define le16_to_cpu(x) ((uint16_t)(x))
 17  	#define cpu_to_be64(x) swab64(x)
 18  	#define be64_to_cpu(x) swab64(x)
 19  	#define cpu_to_be32(x) swab32(x)
 20  	#define be32_to_cpu(x) swab32(x)
 21  	#define cpu_to_be16(x) swab16(x)
 22  	#define be16_to_cpu(x) swab16(x)
 23  #elif defined(__BIG_ENDIAN)
 24  	#define cpu_to_le64(x) swab64(x)
 25  	#define le64_to_cpu(x) swab64(x)
 26  	#define cpu_to_le32(x) swab32(x)
 27  	#define le32_to_cpu(x) swab32(x)
 28  	#define cpu_to_le16(x) swab16(x)
 29  	#define le16_to_cpu(x) swab16(x)
 30  	#define cpu_to_be64(x) ((uint64_t)(x))
 31  	#define be64_to_cpu(x) ((uint64_t)(x))
 32  	#define cpu_to_be32(x) ((uint32_t)(x))
 33  	#define be32_to_cpu(x) ((uint32_t)(x))
 34  	#define cpu_to_be16(x) ((uint16_t)(x))
 35  	#define be16_to_cpu(x) ((uint16_t)(x))
 36  #else
 37  	#error "<arch/byteorder.h> must #define __LITTLE_ENDIAN or __BIG_ENDIAN"
 38  #endif
 39  
 40  #define ntohll(x) be64_to_cpu(x)
 41  #define htonll(x) cpu_to_be64(x)
 42  #define ntohl(x)  be32_to_cpu(x)
 43  #define htonl(x)  cpu_to_be32(x)
 44  
 45  #define __clrsetbits(endian, bits, addr, clear, set) \
 46  	write##bits(addr, cpu_to_##endian##bits((endian##bits##_to_cpu( \
 47  		read##bits(addr)) & ~((uint##bits##_t)(clear))) | (set)))
 48  
 49  #define clrbits_le64(addr, clear)	__clrsetbits(le, 64, addr, clear, 0)
 50  #define clrbits_be64(addr, clear)	__clrsetbits(be, 64, addr, clear, 0)
 51  #define clrbits_le32(addr, clear)	__clrsetbits(le, 32, addr, clear, 0)
 52  #define clrbits_be32(addr, clear)	__clrsetbits(be, 32, addr, clear, 0)
 53  #define clrbits_le16(addr, clear)	__clrsetbits(le, 16, addr, clear, 0)
 54  #define clrbits_be16(addr, clear)	__clrsetbits(be, 16, addr, clear, 0)
 55  
 56  #define setbits_le64(addr, set)		__clrsetbits(le, 64, addr, 0, set)
 57  #define setbits_be64(addr, set)		__clrsetbits(be, 64, addr, 0, set)
 58  #define setbits_le32(addr, set)		__clrsetbits(le, 32, addr, 0, set)
 59  #define setbits_be32(addr, set)		__clrsetbits(be, 32, addr, 0, set)
 60  #define setbits_le16(addr, set)		__clrsetbits(le, 16, addr, 0, set)
 61  #define setbits_be16(addr, set)		__clrsetbits(be, 16, addr, 0, set)
 62  
 63  #define clrsetbits_le64(addr, clear, set) __clrsetbits(le, 64, addr, clear, set)
 64  #define clrsetbits_be64(addr, clear, set) __clrsetbits(be, 64, addr, clear, set)
 65  #define clrsetbits_le32(addr, clear, set) __clrsetbits(le, 32, addr, clear, set)
 66  #define clrsetbits_be32(addr, clear, set) __clrsetbits(be, 32, addr, clear, set)
 67  #define clrsetbits_le16(addr, clear, set) __clrsetbits(le, 16, addr, clear, set)
 68  #define clrsetbits_be16(addr, clear, set) __clrsetbits(be, 16, addr, clear, set)
 69  
 70  /* be16dec/be32dec/be64dec/le16dec/le32dec/le64dec family of functions. */
 71  #define DEFINE_ENDIAN_DEC(endian, width) \
 72  	static inline uint##width##_t endian##width##dec(const void *p) \
 73  	{ \
 74  		return endian##width##_to_cpu(*(uint##width##_t *)p); \
 75  	}
 76  DEFINE_ENDIAN_DEC(be, 16)
 77  DEFINE_ENDIAN_DEC(be, 32)
 78  DEFINE_ENDIAN_DEC(be, 64)
 79  DEFINE_ENDIAN_DEC(le, 16)
 80  DEFINE_ENDIAN_DEC(le, 32)
 81  DEFINE_ENDIAN_DEC(le, 64)
 82  
 83  /* be16enc/be32enc/be64enc/le16enc/le32enc/le64enc family of functions. */
 84  #define DEFINE_ENDIAN_ENC(endian, width) \
 85  	static inline void endian##width##enc(void *p, uint##width##_t u) \
 86  	{ \
 87  		*(uint##width##_t *)p = cpu_to_##endian##width(u); \
 88  	}
 89  DEFINE_ENDIAN_ENC(be, 16)
 90  DEFINE_ENDIAN_ENC(be, 32)
 91  DEFINE_ENDIAN_ENC(be, 64)
 92  DEFINE_ENDIAN_ENC(le, 16)
 93  DEFINE_ENDIAN_ENC(le, 32)
 94  DEFINE_ENDIAN_ENC(le, 64)
 95  
 96  /*
 97   * Portable (API) endian support that can be used in code that is shared
 98   * with userspace (man 3 endian) tools.
 99   */
100  static inline uint16_t htobe16(uint16_t host_16bits)
101  {
102  	return cpu_to_be16(host_16bits);
103  }
104  
105  static inline uint16_t htole16(uint16_t host_16bits)
106  {
107  	return cpu_to_le16(host_16bits);
108  }
109  
110  static inline uint16_t be16toh(uint16_t big_endian_16bits)
111  {
112  	return be16_to_cpu(big_endian_16bits);
113  }
114  
115  static inline uint16_t le16toh(uint16_t little_endian_16bits)
116  {
117  	return le16_to_cpu(little_endian_16bits);
118  }
119  
120  static inline uint32_t htobe32(uint32_t host_32bits)
121  {
122  	return cpu_to_be32(host_32bits);
123  }
124  
125  static inline uint32_t htole32(uint32_t host_32bits)
126  {
127  	return cpu_to_le32(host_32bits);
128  }
129  
130  static inline uint32_t be32toh(uint32_t big_endian_32bits)
131  {
132  	return be32_to_cpu(big_endian_32bits);
133  }
134  
135  static inline uint32_t le32toh(uint32_t little_endian_32bits)
136  {
137  	return le32_to_cpu(little_endian_32bits);
138  }
139  
140  static inline uint64_t htobe64(uint64_t host_64bits)
141  {
142  	return cpu_to_be64(host_64bits);
143  }
144  
145  static inline uint64_t htole64(uint64_t host_64bits)
146  {
147  	return cpu_to_le64(host_64bits);
148  }
149  
150  static inline uint64_t be64toh(uint64_t big_endian_64bits)
151  {
152  	return be64_to_cpu(big_endian_64bits);
153  }
154  
155  static inline uint64_t le64toh(uint64_t little_endian_64bits)
156  {
157  	return le64_to_cpu(little_endian_64bits);
158  }
159  
160  #endif