Merge remote-tracking branch 'remotes/cody/tags/block-pull-request' into staging
[qemu.git] / pc-bios / s390-ccw / iplb.h
1 /*
2 * QEMU S390 IPL Block
3 *
4 * Copyright 2015 IBM Corp.
5 * Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
9 * directory.
10 */
11
12 #ifndef IPLB_H
13 #define IPLB_H
14
15 struct IplBlockCcw {
16 uint64_t netboot_start_addr;
17 uint8_t reserved0[77];
18 uint8_t ssid;
19 uint16_t devno;
20 uint8_t vm_flags;
21 uint8_t reserved3[3];
22 uint32_t vm_parm_len;
23 uint8_t nss_name[8];
24 uint8_t vm_parm[64];
25 uint8_t reserved4[8];
26 } __attribute__ ((packed));
27 typedef struct IplBlockCcw IplBlockCcw;
28
29 struct IplBlockFcp {
30 uint8_t reserved1[305 - 1];
31 uint8_t opt;
32 uint8_t reserved2[3];
33 uint16_t reserved3;
34 uint16_t devno;
35 uint8_t reserved4[4];
36 uint64_t wwpn;
37 uint64_t lun;
38 uint32_t bootprog;
39 uint8_t reserved5[12];
40 uint64_t br_lba;
41 uint32_t scp_data_len;
42 uint8_t reserved6[260];
43 uint8_t scp_data[];
44 } __attribute__ ((packed));
45 typedef struct IplBlockFcp IplBlockFcp;
46
47 struct IplBlockQemuScsi {
48 uint32_t lun;
49 uint16_t target;
50 uint16_t channel;
51 uint8_t reserved0[77];
52 uint8_t ssid;
53 uint16_t devno;
54 } __attribute__ ((packed));
55 typedef struct IplBlockQemuScsi IplBlockQemuScsi;
56
57 struct IplParameterBlock {
58 uint32_t len;
59 uint8_t reserved0[3];
60 uint8_t version;
61 uint32_t blk0_len;
62 uint8_t pbt;
63 uint8_t flags;
64 uint16_t reserved01;
65 uint8_t loadparm[8];
66 union {
67 IplBlockCcw ccw;
68 IplBlockFcp fcp;
69 IplBlockQemuScsi scsi;
70 };
71 } __attribute__ ((packed));
72 typedef struct IplParameterBlock IplParameterBlock;
73
74 extern IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
75
76 #define S390_IPL_TYPE_FCP 0x00
77 #define S390_IPL_TYPE_CCW 0x02
78 #define S390_IPL_TYPE_QEMU_SCSI 0xff
79
80 static inline bool store_iplb(IplParameterBlock *iplb)
81 {
82 register unsigned long addr asm("0") = (unsigned long) iplb;
83 register unsigned long rc asm("1") = 0;
84
85 asm volatile ("diag %0,%2,0x308\n"
86 : "+d" (addr), "+d" (rc)
87 : "d" (6)
88 : "memory", "cc");
89 return rc == 0x01;
90 }
91
92 #endif /* IPLB_H */