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authorDavid S. Miller <davem@sunset.davemloft.net>2007-07-14 02:23:37 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-16 04:05:02 -0700
commit8b99cfb8cc51adae7f5294c8962a026c63100959 (patch)
tree349cebcae3eda608f1ed52fa3afcf661fca075a9 /include/asm-sparc64
parent27a2ef382c7935a4dd02bff9fd361ce118df98c6 (diff)
downloadblackbird-op-linux-8b99cfb8cc51adae7f5294c8962a026c63100959.tar.gz
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[SPARC64]: More sensible udelay implementation.
Take a page from the powerpc folks and just calculate the delay factor directly. Since frequency scaling chips use a system-tick register, the value is going to be the same system-wide. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-sparc64')
-rw-r--r--include/asm-sparc64/bugs.h5
-rw-r--r--include/asm-sparc64/cpudata.h2
-rw-r--r--include/asm-sparc64/delay.h32
3 files changed, 7 insertions, 32 deletions
diff --git a/include/asm-sparc64/bugs.h b/include/asm-sparc64/bugs.h
index bf39d86c0c9e..11ade6841971 100644
--- a/include/asm-sparc64/bugs.h
+++ b/include/asm-sparc64/bugs.h
@@ -4,12 +4,7 @@
*/
#include <asm/sstate.h>
-extern unsigned long loops_per_jiffy;
-
static void __init check_bugs(void)
{
-#ifndef CONFIG_SMP
- cpu_data(0).udelay_val = loops_per_jiffy;
-#endif
sstate_running();
}
diff --git a/include/asm-sparc64/cpudata.h b/include/asm-sparc64/cpudata.h
index 0016d8b4531c..98a6e609163e 100644
--- a/include/asm-sparc64/cpudata.h
+++ b/include/asm-sparc64/cpudata.h
@@ -19,7 +19,7 @@ typedef struct {
unsigned int __softirq_pending; /* must be 1st, see rtrap.S */
unsigned int __pad0;
unsigned long clock_tick; /* %tick's per second */
- unsigned long udelay_val;
+ unsigned long __pad;
unsigned int __pad1;
unsigned int __pad2;
diff --git a/include/asm-sparc64/delay.h b/include/asm-sparc64/delay.h
index a4aae6f80627..a77aa622d762 100644
--- a/include/asm-sparc64/delay.h
+++ b/include/asm-sparc64/delay.h
@@ -1,37 +1,17 @@
/* delay.h: Linux delay routines on sparc64.
*
- * Copyright (C) 1996, 2004 David S. Miller (davem@davemloft.net).
- *
- * Based heavily upon x86 variant which is:
- * Copyright (C) 1993 Linus Torvalds
- *
- * Delay routines calling functions in arch/sparc64/lib/delay.c
+ * Copyright (C) 1996, 2004, 2007 David S. Miller (davem@davemloft.net).
*/
-#ifndef __SPARC64_DELAY_H
-#define __SPARC64_DELAY_H
-
-#include <linux/param.h>
-#include <asm/cpudata.h>
+#ifndef _SPARC64_DELAY_H
+#define _SPARC64_DELAY_H
#ifndef __ASSEMBLY__
-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))
+extern void udelay(unsigned long usecs);
+#define mdelay(n) udelay((n) * 1000)
#endif /* !__ASSEMBLY__ */
-#endif /* defined(__SPARC64_DELAY_H) */
+#endif /* _SPARC64_DELAY_H */
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