mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-08 22:24:32 +00:00
920be88e92
generic.h has changed in Linux and new addtionals functions were added. This commit takes the latest and greatest from Linux (v4.17-rc5) to aid with porting drivers that utilize these functions. Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
207 lines
6.1 KiB
C
207 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_BYTEORDER_GENERIC_H
|
|
#define _LINUX_BYTEORDER_GENERIC_H
|
|
|
|
/*
|
|
* linux/byteorder/generic.h
|
|
* Generic Byte-reordering support
|
|
*
|
|
* The "... p" macros, like le64_to_cpup, can be used with pointers
|
|
* to unaligned data, but there will be a performance penalty on
|
|
* some architectures. Use get_unaligned for unaligned data.
|
|
*
|
|
* Francois-Rene Rideau <fare@tunes.org> 19970707
|
|
* gathered all the good ideas from all asm-foo/byteorder.h into one file,
|
|
* cleaned them up.
|
|
* I hope it is compliant with non-GCC compilers.
|
|
* I decided to put __BYTEORDER_HAS_U64__ in byteorder.h,
|
|
* because I wasn't sure it would be ok to put it in types.h
|
|
* Upgraded it to 2.1.43
|
|
* Francois-Rene Rideau <fare@tunes.org> 19971012
|
|
* Upgraded it to 2.1.57
|
|
* to please Linus T., replaced huge #ifdef's between little/big endian
|
|
* by nestedly #include'd files.
|
|
* Francois-Rene Rideau <fare@tunes.org> 19971205
|
|
* Made it to 2.1.71; now a facelift:
|
|
* Put files under include/linux/byteorder/
|
|
* Split swab from generic support.
|
|
*
|
|
* TODO:
|
|
* = Regular kernel maintainers could also replace all these manual
|
|
* byteswap macros that remain, disseminated among drivers,
|
|
* after some grep or the sources...
|
|
* = Linus might want to rename all these macros and files to fit his taste,
|
|
* to fit his personal naming scheme.
|
|
* = it seems that a few drivers would also appreciate
|
|
* nybble swapping support...
|
|
* = every architecture could add their byteswap macro in asm/byteorder.h
|
|
* see how some architectures already do (i386, alpha, ppc, etc)
|
|
* = cpu_to_beXX and beXX_to_cpu might some day need to be well
|
|
* distinguished throughout the kernel. This is not the case currently,
|
|
* since little endian, big endian, and pdp endian machines needn't it.
|
|
* But this might be the case for, say, a port of Linux to 20/21 bit
|
|
* architectures (and F21 Linux addict around?).
|
|
*/
|
|
|
|
/*
|
|
* The following macros are to be defined by <asm/byteorder.h>:
|
|
*
|
|
* Conversion of long and short int between network and host format
|
|
* ntohl(__u32 x)
|
|
* ntohs(__u16 x)
|
|
* htonl(__u32 x)
|
|
* htons(__u16 x)
|
|
* It seems that some programs (which? where? or perhaps a standard? POSIX?)
|
|
* might like the above to be functions, not macros (why?).
|
|
* if that's true, then detect them, and take measures.
|
|
* Anyway, the measure is: define only ___ntohl as a macro instead,
|
|
* and in a separate file, have
|
|
* unsigned long inline ntohl(x){return ___ntohl(x);}
|
|
*
|
|
* The same for constant arguments
|
|
* __constant_ntohl(__u32 x)
|
|
* __constant_ntohs(__u16 x)
|
|
* __constant_htonl(__u32 x)
|
|
* __constant_htons(__u16 x)
|
|
*
|
|
* Conversion of XX-bit integers (16- 32- or 64-)
|
|
* between native CPU format and little/big endian format
|
|
* 64-bit stuff only defined for proper architectures
|
|
* cpu_to_[bl]eXX(__uXX x)
|
|
* [bl]eXX_to_cpu(__uXX x)
|
|
*
|
|
* The same, but takes a pointer to the value to convert
|
|
* cpu_to_[bl]eXXp(__uXX x)
|
|
* [bl]eXX_to_cpup(__uXX x)
|
|
*
|
|
* The same, but change in situ
|
|
* cpu_to_[bl]eXXs(__uXX x)
|
|
* [bl]eXX_to_cpus(__uXX x)
|
|
*
|
|
* See asm-foo/byteorder.h for examples of how to provide
|
|
* architecture-optimized versions
|
|
*
|
|
*/
|
|
|
|
#define cpu_to_le64 __cpu_to_le64
|
|
#define le64_to_cpu __le64_to_cpu
|
|
#define cpu_to_le32 __cpu_to_le32
|
|
#define le32_to_cpu __le32_to_cpu
|
|
#define cpu_to_le16 __cpu_to_le16
|
|
#define le16_to_cpu __le16_to_cpu
|
|
#define cpu_to_be64 __cpu_to_be64
|
|
#define be64_to_cpu __be64_to_cpu
|
|
#define cpu_to_be32 __cpu_to_be32
|
|
#define be32_to_cpu __be32_to_cpu
|
|
#define cpu_to_be16 __cpu_to_be16
|
|
#define be16_to_cpu __be16_to_cpu
|
|
#define cpu_to_le64p __cpu_to_le64p
|
|
#define le64_to_cpup __le64_to_cpup
|
|
#define cpu_to_le32p __cpu_to_le32p
|
|
#define le32_to_cpup __le32_to_cpup
|
|
#define cpu_to_le16p __cpu_to_le16p
|
|
#define le16_to_cpup __le16_to_cpup
|
|
#define cpu_to_be64p __cpu_to_be64p
|
|
#define be64_to_cpup __be64_to_cpup
|
|
#define cpu_to_be32p __cpu_to_be32p
|
|
#define be32_to_cpup __be32_to_cpup
|
|
#define cpu_to_be16p __cpu_to_be16p
|
|
#define be16_to_cpup __be16_to_cpup
|
|
#define cpu_to_le64s __cpu_to_le64s
|
|
#define le64_to_cpus __le64_to_cpus
|
|
#define cpu_to_le32s __cpu_to_le32s
|
|
#define le32_to_cpus __le32_to_cpus
|
|
#define cpu_to_le16s __cpu_to_le16s
|
|
#define le16_to_cpus __le16_to_cpus
|
|
#define cpu_to_be64s __cpu_to_be64s
|
|
#define be64_to_cpus __be64_to_cpus
|
|
#define cpu_to_be32s __cpu_to_be32s
|
|
#define be32_to_cpus __be32_to_cpus
|
|
#define cpu_to_be16s __cpu_to_be16s
|
|
#define be16_to_cpus __be16_to_cpus
|
|
|
|
/*
|
|
* They have to be macros in order to do the constant folding
|
|
* correctly - if the argument passed into a inline function
|
|
* it is no longer constant according to gcc..
|
|
*/
|
|
|
|
#undef ntohl
|
|
#undef ntohs
|
|
#undef htonl
|
|
#undef htons
|
|
|
|
#define ___htonl(x) __cpu_to_be32(x)
|
|
#define ___htons(x) __cpu_to_be16(x)
|
|
#define ___ntohl(x) __be32_to_cpu(x)
|
|
#define ___ntohs(x) __be16_to_cpu(x)
|
|
|
|
#define htonl(x) ___htonl(x)
|
|
#define ntohl(x) ___ntohl(x)
|
|
#define htons(x) ___htons(x)
|
|
#define ntohs(x) ___ntohs(x)
|
|
|
|
static inline void le16_add_cpu(__le16 *var, u16 val)
|
|
{
|
|
*var = cpu_to_le16(le16_to_cpu(*var) + val);
|
|
}
|
|
|
|
static inline void le32_add_cpu(__le32 *var, u32 val)
|
|
{
|
|
*var = cpu_to_le32(le32_to_cpu(*var) + val);
|
|
}
|
|
|
|
static inline void le64_add_cpu(__le64 *var, u64 val)
|
|
{
|
|
*var = cpu_to_le64(le64_to_cpu(*var) + val);
|
|
}
|
|
|
|
/* XXX: this stuff can be optimized */
|
|
static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
|
|
{
|
|
while (words--) {
|
|
__le32_to_cpus(buf);
|
|
buf++;
|
|
}
|
|
}
|
|
|
|
static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
|
|
{
|
|
while (words--) {
|
|
__cpu_to_le32s(buf);
|
|
buf++;
|
|
}
|
|
}
|
|
|
|
static inline void be16_add_cpu(__be16 *var, u16 val)
|
|
{
|
|
*var = cpu_to_be16(be16_to_cpu(*var) + val);
|
|
}
|
|
|
|
static inline void be32_add_cpu(__be32 *var, u32 val)
|
|
{
|
|
*var = cpu_to_be32(be32_to_cpu(*var) + val);
|
|
}
|
|
|
|
static inline void be64_add_cpu(__be64 *var, u64 val)
|
|
{
|
|
*var = cpu_to_be64(be64_to_cpu(*var) + val);
|
|
}
|
|
|
|
static inline void cpu_to_be32_array(__be32 *dst, const u32 *src, size_t len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
dst[i] = cpu_to_be32(src[i]);
|
|
}
|
|
|
|
static inline void be32_to_cpu_array(u32 *dst, const __be32 *src, size_t len)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < len; i++)
|
|
dst[i] = be32_to_cpu(src[i]);
|
|
}
|
|
|
|
#endif /* _LINUX_BYTEORDER_GENERIC_H */
|