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authorRalf Baechle <ralf@linux-mips.org>2007-11-01 11:45:37 -0400
committerRalf Baechle <ralf@linux-mips.org>2007-11-02 12:13:48 -0400
commit72fc19ff51cc32fe85ddb085cb0622b7b97b2158 (patch)
tree784f9cdfba9a0c34ef994a9619de23e00c3479e5 /include/asm-mips
parentc9294022af5022584756d67164e68dba0be9302b (diff)
[MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.
This is the clock rate of the i8253 PIT. A MIPS system may not have a PIT by the symbol is used all over the kernel including some APIs. So keeping it defined to the number for the PIT is the only sane thing for now. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
-rw-r--r--include/asm-mips/mach-au1x00/timex.h13
-rw-r--r--include/asm-mips/mach-generic/timex.h13
-rw-r--r--include/asm-mips/mach-jazz/timex.h16
-rw-r--r--include/asm-mips/mach-qemu/timex.h16
-rw-r--r--include/asm-mips/mach-rm/timex.h13
-rw-r--r--include/asm-mips/timex.h25
6 files changed, 5 insertions, 91 deletions
diff --git a/include/asm-mips/mach-au1x00/timex.h b/include/asm-mips/mach-au1x00/timex.h
deleted file mode 100644
index e3ada66cb636..000000000000
--- a/include/asm-mips/mach-au1x00/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003 by Ralf Baechle
7 */
8#ifndef __ASM_MACH_AU1X00_TIMEX_H
9#define __ASM_MACH_AU1X00_TIMEX_H
10
11#define CLOCK_TICK_RATE ((HZ * 100000UL) / 2)
12
13#endif /* __ASM_MACH_AU1X00_TIMEX_H */
diff --git a/include/asm-mips/mach-generic/timex.h b/include/asm-mips/mach-generic/timex.h
deleted file mode 100644
index 48b4cfaa0d50..000000000000
--- a/include/asm-mips/mach-generic/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003, 2005 by Ralf Baechle
7 */
8#ifndef __ASM_MACH_GENERIC_TIMEX_H
9#define __ASM_MACH_GENERIC_TIMEX_H
10
11#define CLOCK_TICK_RATE 500000
12
13#endif /* __ASM_MACH_GENERIC_TIMEX_H */
diff --git a/include/asm-mips/mach-jazz/timex.h b/include/asm-mips/mach-jazz/timex.h
deleted file mode 100644
index 93affa33dfa8..000000000000
--- a/include/asm-mips/mach-jazz/timex.h
+++ /dev/null
@@ -1,16 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003 by Ralf Baechle
7 */
8#ifndef __ASM_MACH_JAZZ_TIMEX_H
9#define __ASM_MACH_JAZZ_TIMEX_H
10
11/*
12 * Jazz is still using the R4030 100Hz counter
13 */
14#define CLOCK_TICK_RATE 100
15
16#endif /* __ASM_MACH_JAZZ_TIMEX_H */
diff --git a/include/asm-mips/mach-qemu/timex.h b/include/asm-mips/mach-qemu/timex.h
deleted file mode 100644
index cd543693fb0a..000000000000
--- a/include/asm-mips/mach-qemu/timex.h
+++ /dev/null
@@ -1,16 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2005 Daniel Jacobowitz
7 */
8#ifndef __ASM_MACH_QEMU_TIMEX_H
9#define __ASM_MACH_QEMU_TIMEX_H
10
11/*
12 * We use a simulated i8254 PIC...
13 */
14#define CLOCK_TICK_RATE 1193182
15
16#endif /* __ASM_MACH_QEMU_TIMEX_H */
diff --git a/include/asm-mips/mach-rm/timex.h b/include/asm-mips/mach-rm/timex.h
deleted file mode 100644
index 11ff6cb0f214..000000000000
--- a/include/asm-mips/mach-rm/timex.h
+++ /dev/null
@@ -1,13 +0,0 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003, 2005 by Ralf Baechle
7 */
8#ifndef __ASM_MACH_RM200_TIMEX_H
9#define __ASM_MACH_RM200_TIMEX_H
10
11#define CLOCK_TICK_RATE 1193182
12
13#endif /* __ASM_MACH_RM200_TIMEX_H */
diff --git a/include/asm-mips/timex.h b/include/asm-mips/timex.h
index 87c68ae76ff8..5816ad1569d6 100644
--- a/include/asm-mips/timex.h
+++ b/include/asm-mips/timex.h
@@ -13,27 +13,12 @@
13#include <asm/mipsregs.h> 13#include <asm/mipsregs.h>
14 14
15/* 15/*
16 * This is the frequency of the timer used for Linux's timer interrupt. 16 * This is the clock rate of the i8253 PIT. A MIPS system may not have
17 * The value should be defined as accurate as possible or under certain 17 * a PIT by the symbol is used all over the kernel including some APIs.
18 * circumstances Linux timekeeping might become inaccurate or fail. 18 * So keeping it defined to the number for the PIT is the only sane thing
19 * 19 * for now.
20 * For many system the exact clockrate of the timer isn't known but due to
21 * the way this value is used we can get away with a wrong value as long
22 * as this value is:
23 *
24 * - a multiple of HZ
25 * - a divisor of the actual rate
26 *
27 * 500000 is a good such cheat value.
28 *
29 * The obscure number 1193182 is the same as used by the original i8254
30 * time in legacy PC hardware; the chip unfortunately also found in a
31 * bunch of MIPS systems. The last remaining user of the i8254 for the
32 * timer interrupt is the RM200; it's a very standard system so there is
33 * no reason to make this a separate architecture.
34 */ 20 */
35 21#define CLOCK_TICK_RATE 1193182
36#include <timex.h>
37 22
38/* 23/*
39 * Standard way to access the cycle counter. 24 * Standard way to access the cycle counter.