hw/s390x/event-facility.h

   1 /*
   2  * SCLP
   3  *    Event Facility definitions
   4  *
   5  * Copyright IBM, Corp. 2012
   6  *
   7  * Authors:
   8  *  Heinz Graalfs <graalfs@de.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or (at your
  11  * option) any later version.  See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #ifndef HW_S390_SCLP_EVENT_FACILITY_H
  16 #define HW_S390_SCLP_EVENT_FACILITY_H
  17
  18 #include <hw/qdev.h>
  19 #include "qemu/thread.h"
  20
  21 /* SCLP event types */
  22 #define SCLP_EVENT_ASCII_CONSOLE_DATA           0x1a
  23 #define SCLP_EVENT_SIGNAL_QUIESCE               0x1d
  24
  25 /* SCLP event masks */
  26 #define SCLP_EVENT_MASK_SIGNAL_QUIESCE          0x00000008
  27 #define SCLP_EVENT_MASK_MSG_ASCII               0x00000040
  28
  29 #define SCLP_UNCONDITIONAL_READ                 0x00
  30 #define SCLP_SELECTIVE_READ                     0x01
  31
  32 #define TYPE_SCLP_EVENT "s390-sclp-event-type"
  33 #define SCLP_EVENT(obj) \
  34      OBJECT_CHECK(SCLPEvent, (obj), TYPE_SCLP_EVENT)
  35 #define SCLP_EVENT_CLASS(klass) \
  36      OBJECT_CLASS_CHECK(SCLPEventClass, (klass), TYPE_SCLP_EVENT)
  37 #define SCLP_EVENT_GET_CLASS(obj) \
  38      OBJECT_GET_CLASS(SCLPEventClass, (obj), TYPE_SCLP_EVENT)
  39
  40 typedef struct WriteEventMask {
  41     SCCBHeader h;
  42     uint16_t _reserved;
  43     uint16_t mask_length;
  44     uint32_t cp_receive_mask;
  45     uint32_t cp_send_mask;
  46     uint32_t send_mask;
  47     uint32_t receive_mask;
  48 } QEMU_PACKED WriteEventMask;
  49
  50 typedef struct EventBufferHeader {
  51     uint16_t length;
  52     uint8_t  type;
  53     uint8_t  flags;
  54     uint16_t _reserved;
  55 } QEMU_PACKED EventBufferHeader;
  56
  57 typedef struct WriteEventData {
  58     SCCBHeader h;
  59     EventBufferHeader ebh;
  60 } QEMU_PACKED WriteEventData;
  61
  62 typedef struct ReadEventData {
  63     SCCBHeader h;
  64     EventBufferHeader ebh;
  65     uint32_t mask;
  66 } QEMU_PACKED ReadEventData;
  67
  68 typedef struct SCLPEvent {
  69     DeviceState qdev;
  70     bool event_pending;
  71     uint32_t event_type;
  72     char *name;
  73 } SCLPEvent;
  74
  75 typedef struct SCLPEventClass {
  76     DeviceClass parent_class;
  77     int (*init)(SCLPEvent *event);
  78     int (*exit)(SCLPEvent *event);
  79
  80     /* get SCLP's send mask */
  81     unsigned int (*get_send_mask)(void);
  82
  83     /* get SCLP's receive mask */
  84     unsigned int (*get_receive_mask)(void);
  85
  86     int (*read_event_data)(SCLPEvent *event, EventBufferHeader *evt_buf_hdr,
  87                            int *slen);
  88
  89     int (*write_event_data)(SCLPEvent *event, EventBufferHeader *evt_buf_hdr);
  90
  91     /* returns the supported event type */
  92     int (*event_type)(void);
  93
  94 } SCLPEventClass;
  95
  96 #endif