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f6c98f92 HG |
1 | /* |
2 | * SCLP Support | |
3 | * | |
4 | * Copyright IBM, Corp. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
10 | * option) any later version. See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #ifndef HW_S390_SCLP_H | |
15 | #define HW_S390_SCLP_H | |
16 | ||
17 | #include <hw/sysbus.h> | |
18 | #include <hw/qdev.h> | |
19 | ||
20 | /* SCLP command codes */ | |
21 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
22 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
23 | ||
24 | /* SCLP response codes */ | |
25 | #define SCLP_RC_NORMAL_READ_COMPLETION 0x0010 | |
26 | #define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0 | |
27 | ||
28 | /* Service Call Control Block (SCCB) and its elements */ | |
29 | ||
30 | #define SCCB_SIZE 4096 | |
31 | ||
32 | /* | |
33 | * Normally packed structures are not the right thing to do, since all code | |
34 | * must take care of endianess. We cant use ldl_phys and friends for two | |
35 | * reasons, though: | |
36 | * - some of the embedded structures below the SCCB can appear multiple times | |
37 | * at different locations, so there is no fixed offset | |
38 | * - we work on a private copy of the SCCB, since there are several length | |
39 | * fields, that would cause a security nightmare if we allow the guest to | |
40 | * alter the structure while we parse it. We cannot use ldl_p and friends | |
41 | * either without doing pointer arithmetics | |
42 | * So we have to double check that all users of sclp data structures use the | |
43 | * right endianess wrappers. | |
44 | */ | |
45 | typedef struct SCCBHeader { | |
46 | uint16_t length; | |
47 | uint8_t function_code; | |
48 | uint8_t control_mask[3]; | |
49 | uint16_t response_code; | |
50 | } QEMU_PACKED SCCBHeader; | |
51 | ||
52 | #define SCCB_DATA_LEN (SCCB_SIZE - sizeof(SCCBHeader)) | |
53 | ||
54 | typedef struct ReadInfo { | |
55 | SCCBHeader h; | |
56 | uint16_t rnmax; | |
57 | uint8_t rnsize; | |
58 | } QEMU_PACKED ReadInfo; | |
59 | ||
60 | typedef struct SCCB { | |
61 | SCCBHeader h; | |
62 | char data[SCCB_DATA_LEN]; | |
63 | } QEMU_PACKED SCCB; | |
64 | ||
65 | typedef struct S390SCLPDevice { | |
66 | SysBusDevice busdev; | |
67 | } S390SCLPDevice; | |
68 | ||
69 | typedef struct S390SCLPDeviceClass { | |
70 | DeviceClass qdev; | |
71 | int (*init)(S390SCLPDevice *sdev); | |
72 | } S390SCLPDeviceClass; | |
73 | ||
74 | void sclp_service_interrupt(uint32_t sccb); | |
75 | ||
76 | #endif |