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hw/timer/cmsdk-apb-timer.c: Switch to transaction-based ptimer API 

Switch the cmsdk-apb-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>
Message-id: 20191008171740.9679-10-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2019-10-08 18:17:28 +01:00
parent da38e0680f
commit 19c12fe93a
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
hw/timer/cmsdk-apb-timer.c
View File

@ -29,7 +29,6 @@
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "trace.h"
@ -121,14 +120,17 @@ static void cmsdk_apb_timer_write(void *opaque, hwaddr offset, uint64_t value,
"CMSDK APB timer: EXTIN input not supported\n");
}
s->ctrl = value & 0xf;
ptimer_transaction_begin(s->timer);
if (s->ctrl & R_CTRL_EN_MASK) {
ptimer_run(s->timer, ptimer_get_limit(s->timer) == 0);
} else {
ptimer_stop(s->timer);
}
ptimer_transaction_commit(s->timer);
break;
case A_RELOAD:
/* Writing to reload also sets the current timer value */
ptimer_transaction_begin(s->timer);
if (!value) {
ptimer_stop(s->timer);
}
@ -140,8 +142,10 @@ static void cmsdk_apb_timer_write(void *opaque, hwaddr offset, uint64_t value,
*/
ptimer_run(s->timer, 0);
}
ptimer_transaction_commit(s->timer);
break;
case A_VALUE:
ptimer_transaction_begin(s->timer);
if (!value && !ptimer_get_limit(s->timer)) {
ptimer_stop(s->timer);
}
@ -149,6 +153,7 @@ static void cmsdk_apb_timer_write(void *opaque, hwaddr offset, uint64_t value,
if (value && (s->ctrl & R_CTRL_EN_MASK)) {
ptimer_run(s->timer, ptimer_get_limit(s->timer) == 0);
}
ptimer_transaction_commit(s->timer);
break;
case A_INTSTATUS:
/* Just one bit, which is W1C. */
@ -191,9 +196,11 @@ static void cmsdk_apb_timer_reset(DeviceState *dev)
trace_cmsdk_apb_timer_reset();
s->ctrl = 0;
s->intstatus = 0;
ptimer_transaction_begin(s->timer);
ptimer_stop(s->timer);
/* Set the limit and the count */
ptimer_set_limit(s->timer, 0, 1);
ptimer_transaction_commit(s->timer);
}
static void cmsdk_apb_timer_init(Object *obj)
@ -210,21 +217,21 @@ static void cmsdk_apb_timer_init(Object *obj)
static void cmsdk_apb_timer_realize(DeviceState *dev, Error **errp)
{
CMSDKAPBTIMER *s = CMSDK_APB_TIMER(dev);
QEMUBH *bh;
if (s->pclk_frq == 0) {
error_setg(errp, "CMSDK APB timer: pclk-frq property must be set");
return;
}
bh = qemu_bh_new(cmsdk_apb_timer_tick, s);
s->timer = ptimer_init_with_bh(bh,
s->timer = ptimer_init(cmsdk_apb_timer_tick, s,
PTIMER_POLICY_WRAP_AFTER_ONE_PERIOD |
PTIMER_POLICY_TRIGGER_ONLY_ON_DECREMENT |
PTIMER_POLICY_NO_IMMEDIATE_RELOAD |
PTIMER_POLICY_NO_COUNTER_ROUND_DOWN);
ptimer_transaction_begin(s->timer);
ptimer_set_freq(s->timer, s->pclk_frq);
ptimer_transaction_commit(s->timer);
}
static const VMStateDescription cmsdk_apb_timer_vmstate = {