Merge tag 'pull-target-arm-20220812' of https://git.linaro.org/people/pmaydell/qemu...
[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 #define LOADPARM_LEN 8
16
17 struct IplBlockCcw {
18 uint8_t reserved0[85];
19 uint8_t ssid;
20 uint16_t devno;
21 uint8_t vm_flags;
22 uint8_t reserved3[3];
23 uint32_t vm_parm_len;
24 uint8_t nss_name[8];
25 uint8_t vm_parm[64];
26 uint8_t reserved4[8];
27 } __attribute__ ((packed));
28 typedef struct IplBlockCcw IplBlockCcw;
29
30 struct IplBlockFcp {
31 uint8_t reserved1[305 - 1];
32 uint8_t opt;
33 uint8_t reserved2[3];
34 uint16_t reserved3;
35 uint16_t devno;
36 uint8_t reserved4[4];
37 uint64_t wwpn;
38 uint64_t lun;
39 uint32_t bootprog;
40 uint8_t reserved5[12];
41 uint64_t br_lba;
42 uint32_t scp_data_len;
43 uint8_t reserved6[260];
44 uint8_t scp_data[];
45 } __attribute__ ((packed));
46 typedef struct IplBlockFcp IplBlockFcp;
47
48 struct IplBlockQemuScsi {
49 uint32_t lun;
50 uint16_t target;
51 uint16_t channel;
52 uint8_t reserved0[77];
53 uint8_t ssid;
54 uint16_t devno;
55 } __attribute__ ((packed));
56 typedef struct IplBlockQemuScsi IplBlockQemuScsi;
57
58 struct IplParameterBlock {
59 uint32_t len;
60 uint8_t reserved0[3];
61 uint8_t version;
62 uint32_t blk0_len;
63 uint8_t pbt;
64 uint8_t flags;
65 uint16_t reserved01;
66 uint8_t loadparm[LOADPARM_LEN];
67 union {
68 IplBlockCcw ccw;
69 IplBlockFcp fcp;
70 IplBlockQemuScsi scsi;
71 };
72 } __attribute__ ((packed));
73 typedef struct IplParameterBlock IplParameterBlock;
74
75 extern IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
76
77 #define QIPL_ADDRESS 0xcc
78
79 /* Boot Menu flags */
80 #define QIPL_FLAG_BM_OPTS_CMD 0x80
81 #define QIPL_FLAG_BM_OPTS_ZIPL 0x40
82
83 /*
84 * This definition must be kept in sync with the defininition
85 * in hw/s390x/ipl.h
86 */
87 struct QemuIplParameters {
88 uint8_t qipl_flags;
89 uint8_t reserved1[3];
90 uint64_t netboot_start_addr;
91 uint32_t boot_menu_timeout;
92 uint8_t reserved2[12];
93 } __attribute__ ((packed));
94 typedef struct QemuIplParameters QemuIplParameters;
95
96 extern QemuIplParameters qipl;
97
98 #define S390_IPL_TYPE_FCP 0x00
99 #define S390_IPL_TYPE_CCW 0x02
100 #define S390_IPL_TYPE_QEMU_SCSI 0xff
101
102 static inline bool manage_iplb(IplParameterBlock *iplb, bool store)
103 {
104 register unsigned long addr asm("0") = (unsigned long) iplb;
105 register unsigned long rc asm("1") = 0;
106 unsigned long subcode = store ? 6 : 5;
107
108 asm volatile ("diag %0,%2,0x308\n"
109 : "+d" (addr), "+d" (rc)
110 : "d" (subcode)
111 : "memory", "cc");
112 return rc == 0x01;
113 }
114
115
116 static inline bool store_iplb(IplParameterBlock *iplb)
117 {
118 return manage_iplb(iplb, true);
119 }
120
121 static inline bool set_iplb(IplParameterBlock *iplb)
122 {
123 return manage_iplb(iplb, false);
124 }
125
126 #endif /* IPLB_H */