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authorPaul Mackerras <paulus@samba.org>2008-06-09 00:01:46 -0400
committerPaul Mackerras <paulus@samba.org>2008-06-10 07:40:22 -0400
commit917f0af9e5a9ceecf9e72537fabb501254ba321d (patch)
tree1ef207755c6d83ce4af93ef2b5e4645eebd65886 /include/asm-ppc/delay.h
parent0f3d6bcd391b058c619fc30e8022e8a29fbf4bef (diff)
powerpc: Remove arch/ppc and include/asm-ppc
All the maintained platforms are now in arch/powerpc, so the old arch/ppc stuff can now go away. Acked-by: Adrian Bunk <bunk@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Becky Bruce <becky.bruce@freescale.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Jochen Friedrich <jochen@scram.de> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Jon Loeliger <jdl@freescale.com> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Scott Wood <scottwood@freescale.com> Acked-by: Sean MacLennan <smaclennan@pikatech.com> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc/delay.h')
-rw-r--r--include/asm-ppc/delay.h66
1 files changed, 0 insertions, 66 deletions
diff --git a/include/asm-ppc/delay.h b/include/asm-ppc/delay.h
deleted file mode 100644
index badde6845af2..000000000000
--- a/include/asm-ppc/delay.h
+++ /dev/null
@@ -1,66 +0,0 @@
1#ifdef __KERNEL__
2#ifndef _PPC_DELAY_H
3#define _PPC_DELAY_H
4
5#include <asm/param.h>
6
7/*
8 * Copyright 1996, Paul Mackerras.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16extern unsigned long loops_per_jiffy;
17
18extern void __delay(unsigned int loops);
19
20/*
21 * Note that 19 * 226 == 4294 ==~ 2^32 / 10^6, so
22 * loops = (4294 * usecs * loops_per_jiffy * HZ) / 2^32.
23 *
24 * The mulhwu instruction gives us loops = (a * b) / 2^32.
25 * We choose a = usecs * 19 * HZ and b = loops_per_jiffy * 226
26 * because this lets us support a wide range of HZ and
27 * loops_per_jiffy values without either a or b overflowing 2^32.
28 * Thus we need usecs * HZ <= (2^32 - 1) / 19 = 226050910 and
29 * loops_per_jiffy <= (2^32 - 1) / 226 = 19004280
30 * (which corresponds to ~3800 bogomips at HZ = 100).
31 * -- paulus
32 */
33#define __MAX_UDELAY (226050910UL/HZ) /* maximum udelay argument */
34#define __MAX_NDELAY (4294967295UL/HZ) /* maximum ndelay argument */
35
36extern __inline__ void __udelay(unsigned int x)
37{
38 unsigned int loops;
39
40 __asm__("mulhwu %0,%1,%2" : "=r" (loops) :
41 "r" (x), "r" (loops_per_jiffy * 226));
42 __delay(loops);
43}
44
45extern __inline__ void __ndelay(unsigned int x)
46{
47 unsigned int loops;
48
49 __asm__("mulhwu %0,%1,%2" : "=r" (loops) :
50 "r" (x), "r" (loops_per_jiffy * 5));
51 __delay(loops);
52}
53
54extern void __bad_udelay(void); /* deliberately undefined */
55extern void __bad_ndelay(void); /* deliberately undefined */
56
57#define udelay(n) (__builtin_constant_p(n)? \
58 ((n) > __MAX_UDELAY? __bad_udelay(): __udelay((n) * (19 * HZ))) : \
59 __udelay((n) * (19 * HZ)))
60
61#define ndelay(n) (__builtin_constant_p(n)? \
62 ((n) > __MAX_NDELAY? __bad_ndelay(): __ndelay((n) * HZ)) : \
63 __ndelay((n) * HZ))
64
65#endif /* defined(_PPC_DELAY_H) */
66#endif /* __KERNEL__ */