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-rw-r--r--include/hw/s390x/sclp.h118
1 files changed, 118 insertions, 0 deletions
diff --git a/include/hw/s390x/sclp.h b/include/hw/s390x/sclp.h
new file mode 100644
index 0000000000..231a38aa09
--- /dev/null
+++ b/include/hw/s390x/sclp.h
@@ -0,0 +1,118 @@
+/*
+ * SCLP Support
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Christian Borntraeger <borntraeger@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_S390_SCLP_H
+#define HW_S390_SCLP_H
+
+#include <hw/sysbus.h>
+#include <hw/qdev.h>
+
+/* SCLP command codes */
+#define SCLP_CMDW_READ_SCP_INFO 0x00020001
+#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
+#define SCLP_CMD_READ_EVENT_DATA 0x00770005
+#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
+#define SCLP_CMD_READ_EVENT_DATA 0x00770005
+#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
+#define SCLP_CMD_WRITE_EVENT_MASK 0x00780005
+
+/* SCLP response codes */
+#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
+#define SCLP_RC_NORMAL_COMPLETION 0x0020
+#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
+#define SCLP_RC_CONTAINED_EQUIPMENT_CHECK 0x0340
+#define SCLP_RC_INSUFFICIENT_SCCB_LENGTH 0x0300
+#define SCLP_RC_INVALID_FUNCTION 0x40f0
+#define SCLP_RC_NO_EVENT_BUFFERS_STORED 0x60f0
+#define SCLP_RC_INVALID_SELECTION_MASK 0x70f0
+#define SCLP_RC_INCONSISTENT_LENGTHS 0x72f0
+#define SCLP_RC_EVENT_BUFFER_SYNTAX_ERROR 0x73f0
+#define SCLP_RC_INVALID_MASK_LENGTH 0x74f0
+
+
+/* Service Call Control Block (SCCB) and its elements */
+
+#define SCCB_SIZE 4096
+
+#define SCLP_VARIABLE_LENGTH_RESPONSE 0x80
+#define SCLP_EVENT_BUFFER_ACCEPTED 0x80
+
+#define SCLP_FC_NORMAL_WRITE 0
+
+/*
+ * Normally packed structures are not the right thing to do, since all code
+ * must take care of endianness. We cannot use ldl_phys and friends for two
+ * reasons, though:
+ * - some of the embedded structures below the SCCB can appear multiple times
+ * at different locations, so there is no fixed offset
+ * - we work on a private copy of the SCCB, since there are several length
+ * fields, that would cause a security nightmare if we allow the guest to
+ * alter the structure while we parse it. We cannot use ldl_p and friends
+ * either without doing pointer arithmetics
+ * So we have to double check that all users of sclp data structures use the
+ * right endianness wrappers.
+ */
+typedef struct SCCBHeader {
+ uint16_t length;
+ uint8_t function_code;
+ uint8_t control_mask[3];
+ uint16_t response_code;
+} QEMU_PACKED SCCBHeader;
+
+#define SCCB_DATA_LEN (SCCB_SIZE - sizeof(SCCBHeader))
+
+typedef struct ReadInfo {
+ SCCBHeader h;
+ uint16_t rnmax;
+ uint8_t rnsize;
+} QEMU_PACKED ReadInfo;
+
+typedef struct SCCB {
+ SCCBHeader h;
+ char data[SCCB_DATA_LEN];
+ } QEMU_PACKED SCCB;
+
+static inline int sccb_data_len(SCCB *sccb)
+{
+ return be16_to_cpu(sccb->h.length) - sizeof(sccb->h);
+}
+
+#define TYPE_DEVICE_S390_SCLP "s390-sclp-device"
+#define SCLP_S390_DEVICE(obj) \
+ OBJECT_CHECK(S390SCLPDevice, (obj), TYPE_DEVICE_S390_SCLP)
+#define SCLP_S390_DEVICE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(S390SCLPDeviceClass, (klass), \
+ TYPE_DEVICE_S390_SCLP)
+#define SCLP_S390_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(S390SCLPDeviceClass, (obj), \
+ TYPE_DEVICE_S390_SCLP)
+
+typedef struct SCLPEventFacility SCLPEventFacility;
+
+typedef struct S390SCLPDevice {
+ SysBusDevice busdev;
+ SCLPEventFacility *ef;
+ void (*sclp_command_handler)(SCLPEventFacility *ef, SCCB *sccb,
+ uint64_t code);
+ bool (*event_pending)(SCLPEventFacility *ef);
+} S390SCLPDevice;
+
+typedef struct S390SCLPDeviceClass {
+ DeviceClass qdev;
+ int (*init)(S390SCLPDevice *sdev);
+} S390SCLPDeviceClass;
+
+void s390_sclp_init(void);
+void sclp_service_interrupt(uint32_t sccb);
+
+#endif