hw/m68k/mcf5208.c: Switch to transaction-based ptimer API

Switch the mcf5208 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>
Tested-by: Thomas Huth <huth@tuxfamily.org>
Message-id: 20191017132905.5604-9-peter.maydell@linaro.org

hw/m68k/mcf5208.c

@@ -9,7 +9,6 @@
 #include "qemu/osdep.h"
 #include "qemu/units.h"
 #include "qemu/error-report.h"
-#include "qemu/main-loop.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "cpu.h"
@@ -79,6 +78,7 @@ static void m5208_timer_write(void *opaque, hwaddr offset,
             return;
         }
 
+        ptimer_transaction_begin(s->timer);
         if (s->pcsr & PCSR_EN)
             ptimer_stop(s->timer);
 
@@ -94,8 +94,10 @@ static void m5208_timer_write(void *opaque, hwaddr offset,
 
         if (s->pcsr & PCSR_EN)
             ptimer_run(s->timer, 0);
+        ptimer_transaction_commit(s->timer);
         break;
     case 2:
+        ptimer_transaction_begin(s->timer);
         s->pmr = value;
         s->pcsr &= ~PCSR_PIF;
         if ((s->pcsr & PCSR_RLD) == 0) {
@@ -104,6 +106,7 @@ static void m5208_timer_write(void *opaque, hwaddr offset,
         } else {
             ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW);
         }
+        ptimer_transaction_commit(s->timer);
         break;
     case 4:
         break;
@@ -182,7 +185,6 @@ static void mcf5208_sys_init(MemoryRegion *address_space, qemu_irq *pic)
 {
     MemoryRegion *iomem = g_new(MemoryRegion, 1);
     m5208_timer_state *s;
-    QEMUBH *bh;
     int i;
 
     /* SDRAMC.  */
@@ -191,8 +193,7 @@ static void mcf5208_sys_init(MemoryRegion *address_space, qemu_irq *pic)
     /* Timers.  */
     for (i = 0; i < 2; i++) {
         s = g_new0(m5208_timer_state, 1);
-        bh = qemu_bh_new(m5208_timer_trigger, s);
-        s->timer = ptimer_init_with_bh(bh, PTIMER_POLICY_DEFAULT);
+        s->timer = ptimer_init(m5208_timer_trigger, s, PTIMER_POLICY_DEFAULT);
         memory_region_init_io(&s->iomem, NULL, &m5208_timer_ops, s,
                               "m5208-timer", 0x00004000);
         memory_region_add_subregion(address_space, 0xfc080000 + 0x4000 * i,