[SPARC]: Add ndelay.

arch/sparc/kernel/entry.S

@@ -1808,6 +1808,15 @@ C_LABEL(fpload):
 	retl
 	 nop
 
+	.globl	C_LABEL(ndelay)
+C_LABEL(ndelay):
+	save	%sp, -REGWIN_SZ, %sp
+	mov	%i0, %o0
+	call	.umul
+	 mov	5, %o1
+	ba	delay_continue
+	 nop
+
 	.globl	C_LABEL(udelay)
 C_LABEL(udelay):
 	save	%sp, -REGWIN_SZ, %sp
@@ -1815,6 +1824,7 @@ C_LABEL(udelay):
 	sethi	%hi(0x10c6), %o1
 	call	.umul
 	 or	%o1, %lo(0x10c6), %o1
+delay_continue:
 #ifndef CONFIG_SMP
 	sethi	%hi(C_LABEL(loops_per_jiffy)), %o3
 	call	.umul

arch/sparc/kernel/sparc_ksyms.c

@@ -151,6 +151,7 @@ EXPORT_SYMBOL(__cpu_logical_map);
 #endif
 
 EXPORT_SYMBOL(udelay);
+EXPORT_SYMBOL(ndelay);
 EXPORT_SYMBOL(mostek_lock);
 EXPORT_SYMBOL(mstk48t02_regs);
 #if CONFIG_SUN_AUXIO

include/asm-sparc/delay.h

@@ -21,5 +21,6 @@ extern __inline__ void __delay(unsigned long loops)
 
 /* This is too messy with inline asm on the Sparc. */
 extern void udelay(unsigned long usecs);
+extern void ndelay(unsigned long usecs);
 
 #endif /* defined(__SPARC_DELAY_H) */

include/asm-sparc64/delay.h

@@ -45,6 +45,19 @@ static __inline__ void __udelay(unsigned long usecs, unsigned long 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);
+}
+
 #ifdef CONFIG_SMP
 #define __udelay_val cpu_data[smp_processor_id()].udelay_val
 #else
@@ -52,6 +65,7 @@ static __inline__ void __udelay(unsigned long usecs, unsigned long lps)
 #endif
 
 #define udelay(usecs) __udelay((usecs),__udelay_val)
+#define ndelay(usecs) __ndelay((usecs),__udelay_val)
 
 #endif /* !__ASSEMBLY__ */