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/*
* 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
/* SCLP response codes */
#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
/* Service Call Control Block (SCCB) and its elements */
#define SCCB_SIZE 4096
/*
* Normally packed structures are not the right thing to do, since all code
* must take care of endianess. We cant 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 endianess 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;
typedef struct S390SCLPDevice {
SysBusDevice busdev;
} S390SCLPDevice;
typedef struct S390SCLPDeviceClass {
DeviceClass qdev;
int (*init)(S390SCLPDevice *sdev);
} S390SCLPDeviceClass;
void sclp_service_interrupt(uint32_t sccb);
#endif
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