upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
1.4 KiB
72 lines
1.4 KiB
#ifndef _LINUX_BITOPS_H
|
|
#define _LINUX_BITOPS_H
|
|
|
|
|
|
/*
|
|
* ffs: find first bit set. This is defined the same way as
|
|
* the libc and compiler builtin ffs routines, therefore
|
|
* differs in spirit from the above ffz (man ffs).
|
|
*/
|
|
|
|
static inline int generic_ffs(int x)
|
|
{
|
|
int r = 1;
|
|
|
|
if (!x)
|
|
return 0;
|
|
if (!(x & 0xffff)) {
|
|
x >>= 16;
|
|
r += 16;
|
|
}
|
|
if (!(x & 0xff)) {
|
|
x >>= 8;
|
|
r += 8;
|
|
}
|
|
if (!(x & 0xf)) {
|
|
x >>= 4;
|
|
r += 4;
|
|
}
|
|
if (!(x & 3)) {
|
|
x >>= 2;
|
|
r += 2;
|
|
}
|
|
if (!(x & 1)) {
|
|
x >>= 1;
|
|
r += 1;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* hweightN: returns the hamming weight (i.e. the number
|
|
* of bits set) of a N-bit word
|
|
*/
|
|
|
|
static inline unsigned int generic_hweight32(unsigned int w)
|
|
{
|
|
unsigned int res = (w & 0x55555555) + ((w >> 1) & 0x55555555);
|
|
res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
|
|
res = (res & 0x0F0F0F0F) + ((res >> 4) & 0x0F0F0F0F);
|
|
res = (res & 0x00FF00FF) + ((res >> 8) & 0x00FF00FF);
|
|
return (res & 0x0000FFFF) + ((res >> 16) & 0x0000FFFF);
|
|
}
|
|
|
|
static inline unsigned int generic_hweight16(unsigned int w)
|
|
{
|
|
unsigned int res = (w & 0x5555) + ((w >> 1) & 0x5555);
|
|
res = (res & 0x3333) + ((res >> 2) & 0x3333);
|
|
res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F);
|
|
return (res & 0x00FF) + ((res >> 8) & 0x00FF);
|
|
}
|
|
|
|
static inline unsigned int generic_hweight8(unsigned int w)
|
|
{
|
|
unsigned int res = (w & 0x55) + ((w >> 1) & 0x55);
|
|
res = (res & 0x33) + ((res >> 2) & 0x33);
|
|
return (res & 0x0F) + ((res >> 4) & 0x0F);
|
|
}
|
|
|
|
#include <asm/bitops.h>
|
|
|
|
|
|
#endif
|
|
|