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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-11-11 10:10:28 -0500
committerRalf Baechle <ralf@linux-mips.org>2006-11-29 20:14:49 -0500
commit005985609ff72df3257fde6b29aa9d71342c2a6b (patch)
tree1cf86359ccd44f2b5fbb88f13059b18bafd505fd /arch/mips/kernel/time.c
parent187933f23679c413706030aefad9e85e79164c44 (diff)
[MIPS] mips HPT cleanup: make clocksource_mips public
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>
Diffstat (limited to 'arch/mips/kernel/time.c')
-rw-r--r--arch/mips/kernel/time.c42
1 files changed, 16 insertions, 26 deletions
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 111d1baa3b22..11aab6d6bfe5 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -11,7 +11,6 @@
11 * Free Software Foundation; either version 2 of the License, or (at your 11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version. 12 * option) any later version.
13 */ 13 */
14#include <linux/clocksource.h>
15#include <linux/types.h> 14#include <linux/types.h>
16#include <linux/kernel.h> 15#include <linux/kernel.h>
17#include <linux/init.h> 16#include <linux/init.h>
@@ -83,7 +82,7 @@ static void null_timer_ack(void) { /* nothing */ }
83/* 82/*
84 * Null high precision timer functions for systems lacking one. 83 * Null high precision timer functions for systems lacking one.
85 */ 84 */
86static unsigned int null_hpt_read(void) 85static cycle_t null_hpt_read(void)
87{ 86{
88 return 0; 87 return 0;
89} 88}
@@ -112,7 +111,7 @@ static void c0_timer_ack(void)
112/* 111/*
113 * High precision timer functions for a R4k-compatible timer. 112 * High precision timer functions for a R4k-compatible timer.
114 */ 113 */
115static unsigned int c0_hpt_read(void) 114static cycle_t c0_hpt_read(void)
116{ 115{
117 return read_c0_count(); 116 return read_c0_count();
118} 117}
@@ -126,8 +125,6 @@ static void __init c0_hpt_timer_init(void)
126 125
127int (*mips_timer_state)(void); 126int (*mips_timer_state)(void);
128void (*mips_timer_ack)(void); 127void (*mips_timer_ack)(void);
129unsigned int (*mips_hpt_read)(void);
130unsigned int mips_hpt_mask = 0xffffffff;
131 128
132/* last time when xtime and rtc are sync'ed up */ 129/* last time when xtime and rtc are sync'ed up */
133static long last_rtc_update; 130static long last_rtc_update;
@@ -269,8 +266,7 @@ static struct irqaction timer_irqaction = {
269 266
270static unsigned int __init calibrate_hpt(void) 267static unsigned int __init calibrate_hpt(void)
271{ 268{
272 u64 frequency; 269 cycle_t frequency, hpt_start, hpt_end, hpt_count, hz;
273 u32 hpt_start, hpt_end, hpt_count, hz;
274 270
275 const int loops = HZ / 10; 271 const int loops = HZ / 10;
276 int log_2_loops = 0; 272 int log_2_loops = 0;
@@ -296,28 +292,23 @@ static unsigned int __init calibrate_hpt(void)
296 * during the calculated number of periods between timer 292 * during the calculated number of periods between timer
297 * interrupts. 293 * interrupts.
298 */ 294 */
299 hpt_start = mips_hpt_read(); 295 hpt_start = clocksource_mips.read();
300 do { 296 do {
301 while (mips_timer_state()); 297 while (mips_timer_state());
302 while (!mips_timer_state()); 298 while (!mips_timer_state());
303 } while (--i); 299 } while (--i);
304 hpt_end = mips_hpt_read(); 300 hpt_end = clocksource_mips.read();
305 301
306 hpt_count = (hpt_end - hpt_start) & mips_hpt_mask; 302 hpt_count = (hpt_end - hpt_start) & clocksource_mips.mask;
307 hz = HZ; 303 hz = HZ;
308 frequency = (u64)hpt_count * (u64)hz; 304 frequency = hpt_count * hz;
309 305
310 return frequency >> log_2_loops; 306 return frequency >> log_2_loops;
311} 307}
312 308
313static cycle_t read_mips_hpt(void) 309struct clocksource clocksource_mips = {
314{
315 return (cycle_t)mips_hpt_read();
316}
317
318static struct clocksource clocksource_mips = {
319 .name = "MIPS", 310 .name = "MIPS",
320 .read = read_mips_hpt, 311 .mask = 0xffffffff,
321 .is_continuous = 1, 312 .is_continuous = 1,
322}; 313};
323 314
@@ -326,7 +317,7 @@ static void __init init_mips_clocksource(void)
326 u64 temp; 317 u64 temp;
327 u32 shift; 318 u32 shift;
328 319
329 if (!mips_hpt_frequency || mips_hpt_read == null_hpt_read) 320 if (!mips_hpt_frequency || clocksource_mips.read == null_hpt_read)
330 return; 321 return;
331 322
332 /* Calclate a somewhat reasonable rating value */ 323 /* Calclate a somewhat reasonable rating value */
@@ -340,7 +331,6 @@ static void __init init_mips_clocksource(void)
340 } 331 }
341 clocksource_mips.shift = shift; 332 clocksource_mips.shift = shift;
342 clocksource_mips.mult = (u32)temp; 333 clocksource_mips.mult = (u32)temp;
343 clocksource_mips.mask = mips_hpt_mask;
344 334
345 clocksource_register(&clocksource_mips); 335 clocksource_register(&clocksource_mips);
346} 336}
@@ -360,19 +350,19 @@ void __init time_init(void)
360 -xtime.tv_sec, -xtime.tv_nsec); 350 -xtime.tv_sec, -xtime.tv_nsec);
361 351
362 /* Choose appropriate high precision timer routines. */ 352 /* Choose appropriate high precision timer routines. */
363 if (!cpu_has_counter && !mips_hpt_read) 353 if (!cpu_has_counter && !clocksource_mips.read)
364 /* No high precision timer -- sorry. */ 354 /* No high precision timer -- sorry. */
365 mips_hpt_read = null_hpt_read; 355 clocksource_mips.read = null_hpt_read;
366 else if (!mips_hpt_frequency && !mips_timer_state) { 356 else if (!mips_hpt_frequency && !mips_timer_state) {
367 /* A high precision timer of unknown frequency. */ 357 /* A high precision timer of unknown frequency. */
368 if (!mips_hpt_read) 358 if (!clocksource_mips.read)
369 /* No external high precision timer -- use R4k. */ 359 /* No external high precision timer -- use R4k. */
370 mips_hpt_read = c0_hpt_read; 360 clocksource_mips.read = c0_hpt_read;
371 } else { 361 } else {
372 /* We know counter frequency. Or we can get it. */ 362 /* We know counter frequency. Or we can get it. */
373 if (!mips_hpt_read) { 363 if (!clocksource_mips.read) {
374 /* No external high precision timer -- use R4k. */ 364 /* No external high precision timer -- use R4k. */
375 mips_hpt_read = c0_hpt_read; 365 clocksource_mips.read = c0_hpt_read;
376 366
377 if (!mips_timer_state) { 367 if (!mips_timer_state) {
378 /* No external timer interrupt -- use R4k. */ 368 /* No external timer interrupt -- use R4k. */