This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sparc64 / lib / delay.c

diff --git a/arch/sparc64/lib/delay.c b/arch/sparc64/lib/delay.c
new file mode 100644 (file)
index 0000000..f55f528
--- /dev/null
+++ b/arch/sparc64/lib/delay.c
@@ -0,0 +1,49 @@
+/* delay.c: Delay loops for sparc64
+ *
+ * Copyright (C) 2004 David S. Miller <davem@redhat.com>
+ *
+ * Based heavily upon x86 variant which is:
+ *     Copyright (C) 1993 Linus Torvalds
+ *     Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ */
+
+#include <linux/delay.h>
+
+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");
+}
+
+/* We used to multiply by HZ after shifting down by 32 bits
+ * but that runs into problems for higher values of HZ and
+ * slow cpus.
+ */
+void __const_udelay(unsigned long n)
+{
+       n *= 4;
+
+       n *= (cpu_data(smp_processor_id()).udelay_val * (HZ/4));
+       n >>= 32;
+
+       __delay(n + 1);
+}
+
+void __udelay(unsigned long n)
+{
+       __const_udelay(n * 0x10c7UL);
+}
+
+
+void __ndelay(unsigned long n)
+{
+       __const_udelay(n * 0x5UL);
+}