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[MIPS] mips HPT cleanup: make clocksource_mips public

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Make clocksource_mips public and get rid of mips_hpt_read,
mips_hpt_mask.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-11-12 00:10:28 +09:00
committed by Ralf Baechle
parent 187933f236
commit 005985609f
7 changed files with 32 additions and 42 deletions
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42
arch/mips/kernel/time.c
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@ -11,7 +11,6 @@
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/clocksource.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
@ -83,7 +82,7 @@ static void null_timer_ack(void) { /* nothing */ }
/*
* Null high precision timer functions for systems lacking one.
*/
static unsigned int null_hpt_read(void)
static cycle_t null_hpt_read(void)
{
return 0;
}
@ -112,7 +111,7 @@ static void c0_timer_ack(void)
/*
* High precision timer functions for a R4k-compatible timer.
*/
static unsigned int c0_hpt_read(void)
static cycle_t c0_hpt_read(void)
{
return read_c0_count();
}
@ -126,8 +125,6 @@ static void __init c0_hpt_timer_init(void)
int (*mips_timer_state)(void);
void (*mips_timer_ack)(void);
unsigned int (*mips_hpt_read)(void);
unsigned int mips_hpt_mask = 0xffffffff;
/* last time when xtime and rtc are sync'ed up */
static long last_rtc_update;
@ -269,8 +266,7 @@ static struct irqaction timer_irqaction = {
static unsigned int __init calibrate_hpt(void)
{
u64 frequency;
u32 hpt_start, hpt_end, hpt_count, hz;
cycle_t frequency, hpt_start, hpt_end, hpt_count, hz;
const int loops = HZ / 10;
int log_2_loops = 0;
@ -296,28 +292,23 @@ static unsigned int __init calibrate_hpt(void)
* during the calculated number of periods between timer
* interrupts.
*/
hpt_start = mips_hpt_read();
hpt_start = clocksource_mips.read();
do {
while (mips_timer_state());
while (!mips_timer_state());
} while (--i);
hpt_end = mips_hpt_read();
hpt_end = clocksource_mips.read();
hpt_count = (hpt_end - hpt_start) & mips_hpt_mask;
hpt_count = (hpt_end - hpt_start) & clocksource_mips.mask;
hz = HZ;
frequency = (u64)hpt_count * (u64)hz;
frequency = hpt_count * hz;
return frequency >> log_2_loops;
}
static cycle_t read_mips_hpt(void)
{
return (cycle_t)mips_hpt_read();
}
static struct clocksource clocksource_mips = {
struct clocksource clocksource_mips = {
.name = "MIPS",
.read = read_mips_hpt,
.mask = 0xffffffff,
.is_continuous = 1,
};
@ -326,7 +317,7 @@ static void __init init_mips_clocksource(void)
u64 temp;
u32 shift;
if (!mips_hpt_frequency || mips_hpt_read == null_hpt_read)
if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
return;
/* Calclate a somewhat reasonable rating value */
@ -340,7 +331,6 @@ static void __init init_mips_clocksource(void)
}
clocksource_mips.shift = shift;
clocksource_mips.mult = (u32)temp;
clocksource_mips.mask = mips_hpt_mask;
clocksource_register(&clocksource_mips);
}
@ -360,19 +350,19 @@ void __init time_init(void)
-xtime.tv_sec, -xtime.tv_nsec);
/* Choose appropriate high precision timer routines. */
if (!cpu_has_counter && !mips_hpt_read)
if (!cpu_has_counter && !clocksource_mips.read)
/* No high precision timer -- sorry. */
mips_hpt_read = null_hpt_read;
clocksource_mips.read = null_hpt_read;
else if (!mips_hpt_frequency && !mips_timer_state) {
/* A high precision timer of unknown frequency. */
if (!mips_hpt_read)
if (!clocksource_mips.read)
/* No external high precision timer -- use R4k. */
mips_hpt_read = c0_hpt_read;
clocksource_mips.read = c0_hpt_read;
} else {
/* We know counter frequency. Or we can get it. */
if (!mips_hpt_read) {
if (!clocksource_mips.read) {
/* No external high precision timer -- use R4k. */
mips_hpt_read = c0_hpt_read;
clocksource_mips.read = c0_hpt_read;
if (!mips_timer_state) {
/* No external timer interrupt -- use R4k. */