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kernel add
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#ifndef _ASM_SCORE_DELAY_H
#define _ASM_SCORE_DELAY_H
#include <asm-generic/param.h>
static inline void __delay(unsigned long loops)
{
/* 3 cycles per loop. */
__asm__ __volatile__ (
"1:\tsubi\t%0, 3
\t"
"cmpz.c\t%0
\t"
"ble\t1b
\t"
: "=r" (loops)
: "0" (loops));
}
static inline void __udelay(unsigned long usecs)
{
unsigned long loops_per_usec;
loops_per_usec = (loops_per_jiffy * HZ) / 1000000;
__delay(usecs * loops_per_usec);
}
#define udelay(usecs) __udelay(usecs)
#endif /* _ASM_SCORE_DELAY_H */
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