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hw/timer/sh_timer: Switch to transaction-based ptimer API 

Switch the sh_timer code away from bottom-half based ptimers to the
new transaction-based ptimer API.  This just requires adding
begin/commit calls around the various places that modify the ptimer
state, and using the new ptimer_init() function to create the timer.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20191017132905.5604-3-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2019-10-22 16:50:36 +01:00
parent c54dd4b701
commit 28015830d9
1 changed files with 9 additions and 4 deletions
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13
hw/timer/sh_timer.c
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@ -13,7 +13,6 @@
#include "hw/irq.h"
#include "hw/sh4/sh.h"
#include "qemu/timer.h"
#include "qemu/main-loop.h"
#include "hw/ptimer.h"
//#define DEBUG_TIMER
@ -91,13 +90,18 @@ static void sh_timer_write(void *opaque, hwaddr offset,
switch (offset >> 2) {
case OFFSET_TCOR:
s->tcor = value;
ptimer_transaction_begin(s->timer);
ptimer_set_limit(s->timer, s->tcor, 0);
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCNT:
s->tcnt = value;
ptimer_transaction_begin(s->timer);
ptimer_set_count(s->timer, s->tcnt);
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCR:
ptimer_transaction_begin(s->timer);
if (s->enabled) {
/* Pause the timer if it is running. This may cause some
inaccuracy dure to rounding, but avoids a whole lot of other
@ -148,6 +152,7 @@ static void sh_timer_write(void *opaque, hwaddr offset,
/* Restart the timer if still enabled. */
ptimer_run(s->timer, 0);
}
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCPR:
if (s->feat & TIMER_FEAT_CAPT) {
@ -168,12 +173,14 @@ static void sh_timer_start_stop(void *opaque, int enable)
printf("sh_timer_start_stop %d (%d)\n", enable, s->enabled);
#endif
ptimer_transaction_begin(s->timer);
if (s->enabled && !enable) {
ptimer_stop(s->timer);
}
if (!s->enabled && enable) {
ptimer_run(s->timer, 0);
}
ptimer_transaction_commit(s->timer);
s->enabled = !!enable;
#ifdef DEBUG_TIMER
@ -191,7 +198,6 @@ static void sh_timer_tick(void *opaque)
static void *sh_timer_init(uint32_t freq, int feat, qemu_irq irq)
{
sh_timer_state *s;
QEMUBH *bh;
s = (sh_timer_state *)g_malloc0(sizeof(sh_timer_state));
s->freq = freq;
@ -203,8 +209,7 @@ static void *sh_timer_init(uint32_t freq, int feat, qemu_irq irq)
s->enabled = 0;
s->irq = irq;
bh = qemu_bh_new(sh_timer_tick, s);
s->timer = ptimer_init_with_bh(bh, PTIMER_POLICY_DEFAULT);
s->timer = ptimer_init(sh_timer_tick, s, PTIMER_POLICY_DEFAULT);
sh_timer_write(s, OFFSET_TCOR >> 2, s->tcor);
sh_timer_write(s, OFFSET_TCNT >> 2, s->tcnt);