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/
usr/
src/
linux-headers-3.0.0-14/
arch/
mn10300/
unit-asb2364/
include/
unit/
- drwxr-xr-x
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Viewing file:  timex.h (3.24 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* timex.h: MN2WS0038 architecture timer specifications
*
* Copyright (C) 2002, 2010 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_UNIT_TIMEX_H
#define _ASM_UNIT_TIMEX_H
#ifndef __ASSEMBLY__
#include <linux/irq.h>
#endif /* __ASSEMBLY__ */
#include <asm/timer-regs.h>
#include <unit/clock.h>
#include <asm/param.h>
/*
* jiffies counter specifications
*/
#define TMJCBR_MAX 0xffffff /* 24bit */
#define TMJCIRQ TMTIRQ
#ifndef __ASSEMBLY__
#define MN10300_SRC_IOBCLK MN10300_IOBCLK
#ifndef HZ
# error HZ undeclared.
#endif /* !HZ */
#define MN10300_JCCLK (MN10300_SRC_IOBCLK)
#define MN10300_TSCCLK (MN10300_SRC_IOBCLK)
#define MN10300_JC_PER_HZ ((MN10300_JCCLK + HZ / 2) / HZ)
#define MN10300_TSC_PER_HZ ((MN10300_TSCCLK + HZ / 2) / HZ)
/* Check bit width of MTM interval value that sets base register */
#if (MN10300_JC_PER_HZ - 1) > TMJCBR_MAX
# error MTM tick timer interval value is overflow.
#endif
static inline void stop_jiffies_counter(void)
{
u16 tmp;
TMTMD = 0;
tmp = TMTMD;
}
static inline void reload_jiffies_counter(u32 cnt)
{
u32 tmp;
TMTBR = cnt;
tmp = TMTBR;
TMTMD = TMTMD_TMTLDE;
TMTMD = TMTMD_TMTCNE;
tmp = TMTMD;
}
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_CLOCKEVENTS) && \
!defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
/*
* If we aren't using broadcasting, each core needs its own event timer.
* Since CPU0 uses the tick timer which is 24-bits, we use timer 4 & 5
* cascaded to 32-bits for CPU1 (but only really use 24-bits to match
* CPU0).
*/
#define TMJC1IRQ TM5IRQ
static inline void stop_jiffies_counter1(void)
{
u8 tmp;
TM4MD = 0;
TM5MD = 0;
tmp = TM4MD;
tmp = TM5MD;
}
static inline void reload_jiffies_counter1(u32 cnt)
{
u32 tmp;
TM45BR = cnt;
tmp = TM45BR;
TM4MD = TM4MD_INIT_COUNTER;
tmp = TM4MD;
TM5MD = TM5MD_SRC_TM4CASCADE | TM5MD_INIT_COUNTER;
TM5MD = TM5MD_SRC_TM4CASCADE | TM5MD_COUNT_ENABLE;
tmp = TM5MD;
TM4MD = TM4MD_COUNT_ENABLE;
tmp = TM4MD;
}
#endif /* CONFIG_SMP&GENERIC_CLOCKEVENTS&!GENERIC_CLOCKEVENTS_BROADCAST */
#endif /* !__ASSEMBLY__ */
/*
* timestamp counter specifications
*/
#define TMTSCBR_MAX 0xffffffff
#ifndef __ASSEMBLY__
/* Use 32-bit timestamp counter */
#define TMTSCMD TMSMD
#define TMTSCBR TMSBR
#define TMTSCBC TMSBC
#define TMTSCICR TMSICR
static inline void startup_timestamp_counter(void)
{
u32 sync;
/* set up TMS(Timestamp) 32bit timer register to count real time
* - count down from 4Gig-1 to 0 and wrap at IOBCLK rate
*/
TMTSCBR = TMTSCBR_MAX;
sync = TMTSCBR;
TMTSCICR = 0;
sync = TMTSCICR;
TMTSCMD = TMTMD_TMTLDE;
TMTSCMD = TMTMD_TMTCNE;
sync = TMTSCMD;
}
static inline void shutdown_timestamp_counter(void)
{
TMTSCMD = 0;
}
/*
* we use a cascaded pair of 16-bit down-counting timers to count I/O
* clock cycles for the purposes of time keeping
*/
typedef unsigned long cycles_t;
static inline cycles_t read_timestamp_counter(void)
{
return (cycles_t)~TMTSCBC;
}
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_UNIT_TIMEX_H */
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