motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 02:03:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

s390x/event-facility: code restructure

Browse source 
Code restructure in order to simplify class hierarchy
  - remove S390SCLPDevice abstract base class
    and move function pointers into new SCLPEventFacilityClass
  - implement SCLPEventFacility as SysBusDevice
  - use define constants for instance creation strings

The following ascii-art shows the class structure wrt the SCLP EventFacility
before (CURRENT) and after the restructure (NEW):

----
CURRENT:

   "s390-sclp-events-bus"
   +-------------------------+
   |      SCLPEventsBus      |
   |-------------------------|
   |BusState qbus            |
   +-------------------------+

   +-------------------------+
   |   SCLPEventFacility     |  - to be replaced by new SCLPEventFacility,
   |-------------------------|    which will be a SysBusDevice
   |SCLPEventsBus sbus       |
   |DeviceState *qdev        |
   |unsigned int receive_mask|
   +-------------------------+

   +-------------------------+
   |   S390SCLPDeviceClass   |  - to be replaced by new SCLPEventFacilityClass
   |-------------------------|
   |DeviceClass qdev         |
   |*(init)()                |
   +-------------------------+

   "s390-sclp-event-facility"
             |
         instance-of
             |
             V
   "s390-sclp-device"           - this is an abstract class
   +-------------------------+
   |     S390SCLPDevice   (A)|  - to be replaced by new SCLPEventFacility
   |-------------------------|
   |SysBusDevice busdev      |
   |SCLPEventFacility *ef    |
   |                         |
   |*(sclp_command_handler)()|  - these 2 go to new SCLPEventFacilityClass
   |*(event_pending)()       |
   +-------------------------+

----
NEW:

   "s390-sclp-events-bus"
   +-------------------------+
   |      SCLPEventsBus      |
   |-------------------------|
   |BusState qbus            |
   +-------------------------+

   +-------------------------+
   | SCLPEventFacilityClass  |
   |-------------------------|
   |DeviceClass parent_class |
   |                         |
   |*(init)()                |
   |*(command_handler)()     |
   |*(event_pending)()       |
   +-------------------------+

   "s390-sclp-event-facility"
   +-------------------------+
   |   SCLPEventFacility     |
   |-------------------------|
   |SysBusDevice parent_class|
   |SCLPEventsBus sbus       |
   |unsigned int receive_mask|
   +-------------------------+

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Heinz Graalfs 2013-12-18 10:10:49 +01:00 • committed by Christian Borntraeger
parent 65e526c24e
commit 477a72a1ef
4 changed files with 47 additions and 88 deletions
Download patch file Download diff file Expand all files Collapse all files

58
hw/s390x/sclp.c
View file

@ -18,11 +18,12 @@
#include "sysemu/sysemu.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/event-facility.h"
static inline S390SCLPDevice *get_event_facility(void)
static inline SCLPEventFacility *get_event_facility(void)
{
ObjectProperty *op = object_property_find(qdev_get_machine(),
"s390-sclp-event-facility",
TYPE_SCLP_EVENT_FACILITY,
NULL);
assert(op);
return op->opaque;
@ -91,7 +92,8 @@ static void sclp_read_cpu_info(SCCB *sccb)
static void sclp_execute(SCCB *sccb, uint32_t code)
{
S390SCLPDevice *sdev = get_event_facility();
SCLPEventFacility *ef = get_event_facility();
SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
switch (code & SCLP_CMD_CODE_MASK) {
case SCLP_CMDW_READ_SCP_INFO:
@ -102,7 +104,7 @@ static void sclp_execute(SCCB *sccb, uint32_t code)
sclp_read_cpu_info(sccb);
break;
default:
sdev->sclp_command_handler(sdev->ef, sccb, code);
efc->command_handler(ef, sccb, code);
break;
}
}
@ -156,11 +158,13 @@ out:
void sclp_service_interrupt(uint32_t sccb)
{
S390SCLPDevice *sdev = get_event_facility();
SCLPEventFacility *ef = get_event_facility();
SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
uint32_t param = sccb & ~3;
/* Indicate whether an event is still pending */
param |= sdev->event_pending(sdev->ef) ? 1 : 0;
param |= efc->event_pending(ef) ? 1 : 0;
if (!param) {
/* No need to send an interrupt, there's nothing to be notified about */
@ -173,47 +177,9 @@ void sclp_service_interrupt(uint32_t sccb)
void s390_sclp_init(void)
{
DeviceState *dev = qdev_create(NULL, "s390-sclp-event-facility");
DeviceState *dev = qdev_create(NULL, TYPE_SCLP_EVENT_FACILITY);
object_property_add_child(qdev_get_machine(), "s390-sclp-event-facility",
object_property_add_child(qdev_get_machine(), TYPE_SCLP_EVENT_FACILITY,
OBJECT(dev), NULL);
qdev_init_nofail(dev);
}
static int s390_sclp_dev_init(SysBusDevice *dev)
{
int r;
S390SCLPDevice *sdev = (S390SCLPDevice *)dev;
S390SCLPDeviceClass *sclp = SCLP_S390_DEVICE_GET_CLASS(dev);
r = sclp->init(sdev);
if (!r) {
assert(sdev->event_pending);
assert(sdev->sclp_command_handler);
}
return r;
}
static void s390_sclp_device_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *dc = SYS_BUS_DEVICE_CLASS(klass);
dc->init = s390_sclp_dev_init;
}
static const TypeInfo s390_sclp_device_info = {
.name = TYPE_DEVICE_S390_SCLP,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(S390SCLPDevice),
.class_init = s390_sclp_device_class_init,
.class_size = sizeof(S390SCLPDeviceClass),
.abstract = true,
};
static void s390_sclp_register_types(void)
{
type_register_static(&s390_sclp_device_info);
}
type_init(s390_sclp_register_types)