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authorKyle McMartin <kyle@mcmartin.ca>2008-07-28 23:02:13 -0400
committerKyle McMartin <kyle@hera.kernel.org>2008-10-10 12:32:29 -0400
commitdeae26bf6a10e47983606f5df080b91e97650ead (patch)
tree84a8a68145d0f713d7c5a1f9e6b3b03be9b3a4c8 /arch/parisc/include/asm/delay.h
parent6c86cb8237bf08443806089130dc108051569a93 (diff)
parisc: move include/asm-parisc to arch/parisc/include/asm
Diffstat (limited to 'arch/parisc/include/asm/delay.h')
-rw-r--r--arch/parisc/include/asm/delay.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/delay.h b/arch/parisc/include/asm/delay.h
new file mode 100644
index 000000000000..7a75e984674b
--- /dev/null
+++ b/arch/parisc/include/asm/delay.h
@@ -0,0 +1,43 @@
1#ifndef _PARISC_DELAY_H
2#define _PARISC_DELAY_H
3
4#include <asm/system.h> /* for mfctl() */
5#include <asm/processor.h> /* for boot_cpu_data */
6
7
8/*
9 * Copyright (C) 1993 Linus Torvalds
10 *
11 * Delay routines
12 */
13
14static __inline__ void __delay(unsigned long loops) {
15 asm volatile(
16 " .balignl 64,0x34000034\n"
17 " addib,UV -1,%0,.\n"
18 " nop\n"
19 : "=r" (loops) : "0" (loops));
20}
21
22static __inline__ void __cr16_delay(unsigned long clocks) {
23 unsigned long start;
24
25 /*
26 * Note: Due to unsigned math, cr16 rollovers shouldn't be
27 * a problem here. However, on 32 bit, we need to make sure
28 * we don't pass in too big a value. The current default
29 * value of MAX_UDELAY_MS should help prevent this.
30 */
31
32 start = mfctl(16);
33 while ((mfctl(16) - start) < clocks)
34 ;
35}
36
37static __inline__ void __udelay(unsigned long usecs) {
38 __cr16_delay(usecs * ((unsigned long)boot_cpu_data.cpu_hz / 1000000UL));
39}
40
41#define udelay(n) __udelay(n)
42
43#endif /* defined(_PARISC_DELAY_H) */