Root/target/linux/brcm-2.4/files/arch/mips/bcm947xx/include/bcmendian.h

1/*
2 * local version of endian.h - byte order defines
3 *
4 * Copyright 2007, Broadcom Corporation
5 * All Rights Reserved.
6 *
7 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
8 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
9 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
10 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
11 *
12*/
13
14#ifndef _BCMENDIAN_H_
15#define _BCMENDIAN_H_
16
17#include <typedefs.h>
18
19/* Byte swap a 16 bit value */
20#define BCMSWAP16(val) \
21    ((uint16)(\
22        (((uint16)(val) & (uint16)0x00ffU) << 8) | \
23        (((uint16)(val) & (uint16)0xff00U) >> 8)))
24
25/* Byte swap a 32 bit value */
26#define BCMSWAP32(val) \
27    ((uint32)(\
28        (((uint32)(val) & (uint32)0x000000ffUL) << 24) | \
29        (((uint32)(val) & (uint32)0x0000ff00UL) << 8) | \
30        (((uint32)(val) & (uint32)0x00ff0000UL) >> 8) | \
31        (((uint32)(val) & (uint32)0xff000000UL) >> 24)))
32
33/* 2 Byte swap a 32 bit value */
34#define BCMSWAP32BY16(val) \
35    ((uint32)(\
36        (((uint32)(val) & (uint32)0x0000ffffUL) << 16) | \
37        (((uint32)(val) & (uint32)0xffff0000UL) >> 16)))
38
39
40static INLINE uint16
41bcmswap16(uint16 val)
42{
43    return BCMSWAP16(val);
44}
45
46static INLINE uint32
47bcmswap32(uint32 val)
48{
49    return BCMSWAP32(val);
50}
51
52static INLINE uint32
53bcmswap32by16(uint32 val)
54{
55    return BCMSWAP32BY16(val);
56}
57
58/* buf - start of buffer of shorts to swap */
59/* len - byte length of buffer */
60static INLINE void
61bcmswap16_buf(uint16 *buf, uint len)
62{
63    len = len/2;
64
65    while (len--) {
66        *buf = bcmswap16(*buf);
67        buf++;
68    }
69}
70
71#ifndef hton16
72#ifndef IL_BIGENDIAN
73#define HTON16(i) BCMSWAP16(i)
74#define hton16(i) bcmswap16(i)
75#define hton32(i) bcmswap32(i)
76#define ntoh16(i) bcmswap16(i)
77#define ntoh32(i) bcmswap32(i)
78#define ltoh16(i) (i)
79#define ltoh32(i) (i)
80#define htol16(i) (i)
81#define htol32(i) (i)
82#else
83#define HTON16(i) (i)
84#define hton16(i) (i)
85#define hton32(i) (i)
86#define ntoh16(i) (i)
87#define ntoh32(i) (i)
88#define ltoh16(i) bcmswap16(i)
89#define ltoh32(i) bcmswap32(i)
90#define htol16(i) bcmswap16(i)
91#define htol32(i) bcmswap32(i)
92#endif /* IL_BIGENDIAN */
93#endif /* hton16 */
94
95#ifndef IL_BIGENDIAN
96#define ltoh16_buf(buf, i)
97#define htol16_buf(buf, i)
98#else
99#define ltoh16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
100#define htol16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
101#endif /* IL_BIGENDIAN */
102
103/*
104* store 16-bit value to unaligned little endian byte array.
105*/
106static INLINE void
107htol16_ua_store(uint16 val, uint8 *bytes)
108{
109    bytes[0] = val&0xff;
110    bytes[1] = val>>8;
111}
112
113/*
114* store 32-bit value to unaligned little endian byte array.
115*/
116static INLINE void
117htol32_ua_store(uint32 val, uint8 *bytes)
118{
119    bytes[0] = val&0xff;
120    bytes[1] = (val>>8)&0xff;
121    bytes[2] = (val>>16)&0xff;
122    bytes[3] = val>>24;
123}
124
125/*
126* store 16-bit value to unaligned network(big) endian byte array.
127*/
128static INLINE void
129hton16_ua_store(uint16 val, uint8 *bytes)
130{
131    bytes[1] = val&0xff;
132    bytes[0] = val>>8;
133}
134
135/*
136* store 32-bit value to unaligned network(big) endian byte array.
137*/
138static INLINE void
139hton32_ua_store(uint32 val, uint8 *bytes)
140{
141    bytes[3] = val&0xff;
142    bytes[2] = (val>>8)&0xff;
143    bytes[1] = (val>>16)&0xff;
144    bytes[0] = val>>24;
145}
146
147/*
148* load 16-bit value from unaligned little endian byte array.
149*/
150static INLINE uint16
151ltoh16_ua(void *bytes)
152{
153    return (((uint8*)bytes)[1]<<8)+((uint8 *)bytes)[0];
154}
155
156/*
157* load 32-bit value from unaligned little endian byte array.
158*/
159static INLINE uint32
160ltoh32_ua(void *bytes)
161{
162    return (((uint8*)bytes)[3]<<24)+(((uint8*)bytes)[2]<<16)+
163           (((uint8*)bytes)[1]<<8)+((uint8*)bytes)[0];
164}
165
166/*
167* load 16-bit value from unaligned big(network) endian byte array.
168*/
169static INLINE uint16
170ntoh16_ua(void *bytes)
171{
172    return (((uint8*)bytes)[0]<<8)+((uint8*)bytes)[1];
173}
174
175/*
176* load 32-bit value from unaligned big(network) endian byte array.
177*/
178static INLINE uint32
179ntoh32_ua(void *bytes)
180{
181    return (((uint8*)bytes)[0]<<24)+(((uint8*)bytes)[1]<<16)+
182           (((uint8*)bytes)[2]<<8)+((uint8*)bytes)[3];
183}
184
185#define ltoh_ua(ptr) (\
186    sizeof(*(ptr)) == sizeof(uint8) ? *(uint8 *)ptr : \
187    sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] : \
188    (((uint8 *)ptr)[3]<<24)+(((uint8 *)ptr)[2]<<16)+(((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] \
189)
190
191#define ntoh_ua(ptr) (\
192    sizeof(*(ptr)) == sizeof(uint8) ? *(uint8 *)ptr : \
193    sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[0]<<8)+((uint8 *)ptr)[1] : \
194    (((uint8 *)ptr)[0]<<24)+(((uint8 *)ptr)[1]<<16)+(((uint8 *)ptr)[2]<<8)+((uint8 *)ptr)[3] \
195)
196
197#endif /* _BCMENDIAN_H_ */
198

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