apci: switch timer to memory api

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/acpi.c

@@ -331,7 +331,7 @@ void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
     ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
 }
 
-uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
+static uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
 {
     uint32_t d = acpi_pm_tmr_get_clock();
     return d & 0xffffff;
@@ -344,10 +344,25 @@ static void acpi_pm_tmr_timer(void *opaque)
     ar->tmr.update_sci(ar);
 }
 
-void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci)
+static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width)
+{
+    return acpi_pm_tmr_get(opaque);
+}
+
+static const MemoryRegionOps acpi_pm_tmr_ops = {
+    .read = acpi_pm_tmr_read,
+    .valid.min_access_size = 4,
+    .valid.max_access_size = 4,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
+                      MemoryRegion *parent)
 {
     ar->tmr.update_sci = update_sci;
     ar->tmr.timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, ar);
+    memory_region_init_io(&ar->tmr.io, &acpi_pm_tmr_ops, ar, "acpi-tmr", 4);
+    memory_region_add_subregion(parent, 8, &ar->tmr.io);
 }
 
 void acpi_pm_tmr_reset(ACPIREGS *ar)

hw/acpi.h

@@ -84,6 +84,7 @@ typedef void (*acpi_update_sci_fn)(ACPIREGS *ar);
 
 struct ACPIPMTimer {
     QEMUTimer *timer;
+    MemoryRegion io;
     int64_t overflow_time;
 
     acpi_update_sci_fn update_sci;
@@ -119,8 +120,8 @@ struct ACPIREGS {
 /* PM_TMR */
 void acpi_pm_tmr_update(ACPIREGS *ar, bool enable);
 void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar);
-uint32_t acpi_pm_tmr_get(ACPIREGS *ar);
-void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci);
+void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
+                      MemoryRegion *parent);
 void acpi_pm_tmr_reset(ACPIREGS *ar);
 
 #include "qemu-timer.h"

hw/acpi_ich9.c

@@ -170,9 +170,6 @@ static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
     uint32_t val;
 
     switch (addr & ICH9_PMIO_MASK) {
-    case ICH9_PMIO_PM1_TMR:
-        val = acpi_pm_tmr_get(&pm->acpi_regs);
-        break;
     case ICH9_PMIO_SMI_EN:
         val = pm->smi_en;
         break;
@@ -320,7 +317,7 @@ void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
     memory_region_set_enabled(&pm->io, false);
     memory_region_add_subregion(get_system_io(), 0, &pm->io);
 
-    acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn);
+    acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
     acpi_pm1_cnt_init(&pm->acpi_regs);
     acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
     acpi_gpe_blk(&pm->acpi_regs, ICH9_PMIO_GPE0_STS);

hw/acpi_piix4.c

@@ -154,9 +154,6 @@ static uint64_t pm_ioport_read(void *opaque, hwaddr addr, unsigned width)
     case 0x04:
         val = s->ar.pm1.cnt.cnt;
         break;
-    case 0x08:
-        val = acpi_pm_tmr_get(&s->ar);
-        break;
     default:
         val = 0;
         break;
@@ -463,7 +460,7 @@ static int piix4_pm_initfn(PCIDevice *dev)
     memory_region_set_enabled(&s->io, false);
     memory_region_add_subregion(get_system_io(), 0, &s->io);
 
-    acpi_pm_tmr_init(&s->ar, pm_tmr_timer);
+    acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
     acpi_gpe_init(&s->ar, GPE_LEN);
 
     s->powerdown_notifier.notify = piix4_pm_powerdown_req;

hw/vt82c686.c

@@ -252,14 +252,10 @@ static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 
 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
 {
-    VT686PMState *s = opaque;
     uint32_t val;
 
     addr &= 0x0f;
     switch (addr) {
-    case 0x08:
-        val = acpi_pm_tmr_get(&s->ar);
-        break;
     default:
         val = 0;
         break;
@@ -446,7 +442,7 @@ static int vt82c686b_pm_initfn(PCIDevice *dev)
     memory_region_set_enabled(&s->io, false);
     memory_region_add_subregion(get_system_io(), 0, &s->io);
 
-    acpi_pm_tmr_init(&s->ar, pm_tmr_timer);
+    acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
     acpi_pm1_cnt_init(&s->ar);
 
     pm_smbus_init(&s->dev.qdev, &s->smb);