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Added NAND support

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Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
This commit is contained in:
TsiChungLiew 2007-08-05 04:31:18 -05:00 • committed by Stefan Roese
parent eaf9e447be
commit 1a33ce65a4
5 changed files with 317 additions and 4 deletions
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39
include/asm-m68k/bitops.h
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@ -15,4 +15,43 @@ extern int test_and_set_bit(int nr, volatile void *addr);
extern int test_and_clear_bit(int nr, volatile void *addr);
extern int test_and_change_bit(int nr, volatile void *addr);
#ifdef __KERNEL__
/*
* 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).
*/
extern __inline__ int 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;
}
#define __ffs(x) (ffs(x) - 1)
#endif /* __KERNEL__ */
#endif /* _M68K_BITOPS_H */