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Fixup some more fallout from the lapic/i8254 changes:

Browse source 
- Make sure timer0_max_count is set to a correct value in the lapic case.
- Revert i8254_restore() to explicitly reprogram timer 0 rather than
  calling set_timer_freq() to do it.  set_timer_freq() only reprograms
  the counter if the max count changes which it never does on resume.  This
  unbreaks suspend/resume for several people.

Tested by:	marks, others
Reviewed by:	bde
MFC after:	3 days
This commit is contained in:
John Baldwin 2005-07-13 15:43:21 +00:00
parent 11f3a4f069
commit db015a9153
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=147969
5 changed files with 95 additions and 119 deletions
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38
sys/amd64/isa/clock.c
View file

@ -101,6 +101,7 @@ int statclock_disable;
#endif
u_int timer_freq = TIMER_FREQ;
int timer0_max_count;
int timer0_real_max_count;
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
struct mtx clock_lock;
#define RTC_LOCK mtx_lock_spin(&clock_lock)
@ -108,7 +109,6 @@ struct mtx clock_lock;
static int beeping = 0;
static const u_char daysinmonth[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static u_int hardclock_max_count;
static struct intsrc *i8254_intsrc;
static u_int32_t i8254_lastcount;
static u_int32_t i8254_offset;
@ -517,21 +517,24 @@ calibrate_clocks(void)
static void
set_timer_freq(u_int freq, int intr_freq)
{
int new_timer0_max_count;
int new_timer0_real_max_count;
i8254_timecounter.tc_frequency = freq;
mtx_lock_spin(&clock_lock);
timer_freq = freq;
new_timer0_max_count = hardclock_max_count = TIMER_DIV(intr_freq);
if (using_lapic_timer) {
if (using_lapic_timer)
new_timer0_real_max_count = 0x10000;
else
new_timer0_real_max_count = TIMER_DIV(intr_freq);
if (new_timer0_real_max_count != timer0_real_max_count) {
timer0_real_max_count = new_timer0_real_max_count;
if (timer0_real_max_count == 0x10000)
timer0_max_count = 0xffff;
else
timer0_max_count = timer0_real_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, 0);
outb(TIMER_CNTR0, 0);
} else if (new_timer0_max_count != timer0_max_count) {
timer0_max_count = new_timer0_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
}
mtx_unlock_spin(&clock_lock);
}
@ -826,19 +829,8 @@ SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
static unsigned
i8254_simple_get_timecount(struct timecounter *tc)
{
u_int count;
u_int high, low;
mtx_lock_spin(&clock_lock);
/* Select timer0 and latch counter value. */
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
low = inb(TIMER_CNTR0);
high = inb(TIMER_CNTR0);
count = 0xffff - ((high << 8) | low);
mtx_unlock_spin(&clock_lock);
return (count);
return (timer0_max_count - getit());
}
static unsigned

44
sys/i386/isa/clock.c
View file

@ -110,6 +110,7 @@ int statclock_disable;
#endif
u_int timer_freq = TIMER_FREQ;
int timer0_max_count;
int timer0_real_max_count;
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
struct mtx clock_lock;
#define RTC_LOCK mtx_lock_spin(&clock_lock)
@ -117,7 +118,6 @@ struct mtx clock_lock;
static int beeping = 0;
static const u_char daysinmonth[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static u_int hardclock_max_count;
static struct intsrc *i8254_intsrc;
static u_int32_t i8254_lastcount;
static u_int32_t i8254_offset;
@ -531,21 +531,24 @@ calibrate_clocks(void)
static void
set_timer_freq(u_int freq, int intr_freq)
{
int new_timer0_max_count;
int new_timer0_real_max_count;
i8254_timecounter.tc_frequency = freq;
mtx_lock_spin(&clock_lock);
timer_freq = freq;
new_timer0_max_count = hardclock_max_count = TIMER_DIV(intr_freq);
if (using_lapic_timer) {
if (using_lapic_timer)
new_timer0_real_max_count = 0x10000;
else
new_timer0_real_max_count = TIMER_DIV(intr_freq);
if (new_timer0_real_max_count != timer0_real_max_count) {
timer0_real_max_count = new_timer0_real_max_count;
if (timer0_real_max_count == 0x10000)
timer0_max_count = 0xffff;
else
timer0_max_count = timer0_real_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, 0);
outb(TIMER_CNTR0, 0);
} else if (new_timer0_max_count != timer0_max_count) {
timer0_max_count = new_timer0_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
}
mtx_unlock_spin(&clock_lock);
}
@ -554,7 +557,11 @@ static void
i8254_restore(void)
{
set_timer_freq(timer_freq, hz);
mtx_lock_spin(&clock_lock);
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
mtx_unlock_spin(&clock_lock);
}
static void
@ -876,19 +883,8 @@ SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
static unsigned
i8254_simple_get_timecount(struct timecounter *tc)
{
u_int count;
u_int high, low;
mtx_lock_spin(&clock_lock);
/* Select timer0 and latch counter value. */
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
low = inb(TIMER_CNTR0);
high = inb(TIMER_CNTR0);
count = 0xffff - ((high << 8) | low);
mtx_unlock_spin(&clock_lock);
return (count);
return (timer0_max_count - getit());
}
static unsigned

44
sys/isa/atrtc.c
View file

@ -110,6 +110,7 @@ int statclock_disable;
#endif
u_int timer_freq = TIMER_FREQ;
int timer0_max_count;
int timer0_real_max_count;
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
struct mtx clock_lock;
#define RTC_LOCK mtx_lock_spin(&clock_lock)
@ -117,7 +118,6 @@ struct mtx clock_lock;
static int beeping = 0;
static const u_char daysinmonth[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static u_int hardclock_max_count;
static struct intsrc *i8254_intsrc;
static u_int32_t i8254_lastcount;
static u_int32_t i8254_offset;
@ -531,21 +531,24 @@ calibrate_clocks(void)
static void
set_timer_freq(u_int freq, int intr_freq)
{
int new_timer0_max_count;
int new_timer0_real_max_count;
i8254_timecounter.tc_frequency = freq;
mtx_lock_spin(&clock_lock);
timer_freq = freq;
new_timer0_max_count = hardclock_max_count = TIMER_DIV(intr_freq);
if (using_lapic_timer) {
if (using_lapic_timer)
new_timer0_real_max_count = 0x10000;
else
new_timer0_real_max_count = TIMER_DIV(intr_freq);
if (new_timer0_real_max_count != timer0_real_max_count) {
timer0_real_max_count = new_timer0_real_max_count;
if (timer0_real_max_count == 0x10000)
timer0_max_count = 0xffff;
else
timer0_max_count = timer0_real_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, 0);
outb(TIMER_CNTR0, 0);
} else if (new_timer0_max_count != timer0_max_count) {
timer0_max_count = new_timer0_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
}
mtx_unlock_spin(&clock_lock);
}
@ -554,7 +557,11 @@ static void
i8254_restore(void)
{
set_timer_freq(timer_freq, hz);
mtx_lock_spin(&clock_lock);
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
mtx_unlock_spin(&clock_lock);
}
static void
@ -876,19 +883,8 @@ SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
static unsigned
i8254_simple_get_timecount(struct timecounter *tc)
{
u_int count;
u_int high, low;
mtx_lock_spin(&clock_lock);
/* Select timer0 and latch counter value. */
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
low = inb(TIMER_CNTR0);
high = inb(TIMER_CNTR0);
count = 0xffff - ((high << 8) | low);
mtx_unlock_spin(&clock_lock);
return (count);
return (timer0_max_count - getit());
}
static unsigned

44
sys/pc98/cbus/clock.c
View file

@ -109,12 +109,12 @@ int statclock_disable;
#endif
u_int timer_freq = TIMER_FREQ;
int timer0_max_count;
int timer0_real_max_count;
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
struct mtx clock_lock;
static int beeping = 0;
static const u_char daysinmonth[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static u_int hardclock_max_count;
static struct intsrc *i8254_intsrc;
static u_int32_t i8254_lastcount;
static u_int32_t i8254_offset;
@ -472,21 +472,24 @@ calibrate_clocks(void)
static void
set_timer_freq(u_int freq, int intr_freq)
{
int new_timer0_max_count;
int new_timer0_real_max_count;
i8254_timecounter.tc_frequency = freq;
mtx_lock_spin(&clock_lock);
timer_freq = freq;
new_timer0_max_count = hardclock_max_count = TIMER_DIV(intr_freq);
if (using_lapic_timer) {
if (using_lapic_timer)
new_timer0_real_max_count = 0x10000;
else
new_timer0_real_max_count = TIMER_DIV(intr_freq);
if (new_timer0_real_max_count != timer0_real_max_count) {
timer0_real_max_count = new_timer0_real_max_count;
if (timer0_real_max_count == 0x10000)
timer0_max_count = 0xffff;
else
timer0_max_count = timer0_real_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, 0);
outb(TIMER_CNTR0, 0);
} else if (new_timer0_max_count != timer0_max_count) {
timer0_max_count = new_timer0_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
}
mtx_unlock_spin(&clock_lock);
}
@ -495,7 +498,11 @@ static void
i8254_restore(void)
{
set_timer_freq(timer_freq, hz);
mtx_lock_spin(&clock_lock);
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
mtx_unlock_spin(&clock_lock);
}
@ -815,19 +822,8 @@ SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
static unsigned
i8254_simple_get_timecount(struct timecounter *tc)
{
u_int count;
u_int high, low;
mtx_lock_spin(&clock_lock);
/* Select timer0 and latch counter value. */
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
low = inb(TIMER_CNTR0);
high = inb(TIMER_CNTR0);
count = 0xffff - ((high << 8) | low);
mtx_unlock_spin(&clock_lock);
return (count);
return (timer0_max_count - getit());
}
static unsigned

44
sys/pc98/cbus/pcrtc.c
View file

@ -109,12 +109,12 @@ int statclock_disable;
#endif
u_int timer_freq = TIMER_FREQ;
int timer0_max_count;
int timer0_real_max_count;
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
struct mtx clock_lock;
static int beeping = 0;
static const u_char daysinmonth[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static u_int hardclock_max_count;
static struct intsrc *i8254_intsrc;
static u_int32_t i8254_lastcount;
static u_int32_t i8254_offset;
@ -472,21 +472,24 @@ calibrate_clocks(void)
static void
set_timer_freq(u_int freq, int intr_freq)
{
int new_timer0_max_count;
int new_timer0_real_max_count;
i8254_timecounter.tc_frequency = freq;
mtx_lock_spin(&clock_lock);
timer_freq = freq;
new_timer0_max_count = hardclock_max_count = TIMER_DIV(intr_freq);
if (using_lapic_timer) {
if (using_lapic_timer)
new_timer0_real_max_count = 0x10000;
else
new_timer0_real_max_count = TIMER_DIV(intr_freq);
if (new_timer0_real_max_count != timer0_real_max_count) {
timer0_real_max_count = new_timer0_real_max_count;
if (timer0_real_max_count == 0x10000)
timer0_max_count = 0xffff;
else
timer0_max_count = timer0_real_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, 0);
outb(TIMER_CNTR0, 0);
} else if (new_timer0_max_count != timer0_max_count) {
timer0_max_count = new_timer0_max_count;
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
}
mtx_unlock_spin(&clock_lock);
}
@ -495,7 +498,11 @@ static void
i8254_restore(void)
{
set_timer_freq(timer_freq, hz);
mtx_lock_spin(&clock_lock);
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_real_max_count & 0xff);
outb(TIMER_CNTR0, timer0_real_max_count >> 8);
mtx_unlock_spin(&clock_lock);
}
@ -815,19 +822,8 @@ SYSCTL_PROC(_machdep, OID_AUTO, i8254_freq, CTLTYPE_INT | CTLFLAG_RW,
static unsigned
i8254_simple_get_timecount(struct timecounter *tc)
{
u_int count;
u_int high, low;
mtx_lock_spin(&clock_lock);
/* Select timer0 and latch counter value. */
outb(TIMER_MODE, TIMER_SEL0 | TIMER_LATCH);
low = inb(TIMER_CNTR0);
high = inb(TIMER_CNTR0);
count = 0xffff - ((high << 8) | low);
mtx_unlock_spin(&clock_lock);
return (count);
return (timer0_max_count - getit());
}
static unsigned