-static __inline__ void __delay(unsigned long loops)
-{
- __asm__ __volatile__(
-" b,pt %%xcc, 1f\n"
-" cmp %0, 0\n"
-" .align 32\n"
-"1:\n"
-" bne,pt %%xcc, 1b\n"
-" subcc %0, 1, %0\n"
- : "=&r" (loops)
- : "0" (loops)
- : "cc");
-}
-
-static __inline__ void __udelay(unsigned long usecs, unsigned long lps)
-{
- usecs *= 0x00000000000010c6UL; /* 2**32 / 1000000 */
-
- __asm__ __volatile__(
-" mulx %1, %2, %0\n"
-" srlx %0, 32, %0\n"
- : "=r" (usecs)
- : "r" (usecs), "r" (lps));
-
- __delay(usecs * HZ);
-}
-
-extern __inline__ void __ndelay(unsigned long usecs, unsigned long lps)
-{
- usecs *= 0x0000000000000005UL; /* 2**32 / 10000 */
-
- __asm__ __volatile__(
-" mulx %1, %2, %0\n"
-" srlx %0, 32, %0\n"
- : "=r" (usecs)
- : "r" (usecs), "r" (lps));
-
- __delay(usecs * HZ);
-}
-
-#define __udelay_val cpu_data(smp_processor_id()).udelay_val
-
-#define udelay(usecs) __udelay((usecs),__udelay_val)
-#define ndelay(usecs) __ndelay((usecs),__udelay_val)
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
+extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long nsecs);
+extern void __const_udelay(unsigned long usecs);
+extern void __delay(unsigned long loops);
+
+#define udelay(n) (__builtin_constant_p(n) ? \
+ ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
+ __udelay(n))
+
+#define ndelay(n) (__builtin_constant_p(n) ? \
+ ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
+ __ndelay(n))