Merge tag 'pull-target-arm-20220812' of https://git.linaro.org/people/pmaydell/qemu...
[qemu.git] / pc-bios / s390-ccw / s390-arch.h
1 /*
2 * S390 Basic Architecture
3 *
4 * Copyright (c) 2019 Jason J. Herne <jjherne@us.ibm.com>
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or (at
7 * your option) any later version. See the COPYING file in the top-level
8 * directory.
9 */
10
11 #ifndef S390_ARCH_H
12 #define S390_ARCH_H
13
14 typedef struct PSW {
15 uint64_t mask;
16 uint64_t addr;
17 } __attribute__ ((aligned(8))) PSW;
18 _Static_assert(sizeof(struct PSW) == 16, "PSW size incorrect");
19
20 /* Older PSW format used by LPSW instruction */
21 typedef struct PSWLegacy {
22 uint32_t mask;
23 uint32_t addr;
24 } __attribute__ ((aligned(8))) PSWLegacy;
25 _Static_assert(sizeof(struct PSWLegacy) == 8, "PSWLegacy size incorrect");
26
27 /* s390 psw bit masks */
28 #define PSW_MASK_IOINT 0x0200000000000000ULL
29 #define PSW_MASK_SHORTPSW 0x0008000000000000ULL
30 #define PSW_MASK_WAIT 0x0002000000000000ULL
31 #define PSW_MASK_EAMODE 0x0000000100000000ULL
32 #define PSW_MASK_BAMODE 0x0000000080000000ULL
33 #define PSW_MASK_SHORT_ADDR 0x000000007fffffffULL
34 #define PSW_MASK_64 (PSW_MASK_EAMODE | PSW_MASK_BAMODE)
35
36 /* Low core mapping */
37 typedef struct LowCore {
38 /* prefix area: defined by architecture */
39 PSWLegacy ipl_psw; /* 0x000 */
40 uint32_t ccw1[2]; /* 0x008 */
41 union {
42 uint32_t ccw2[2]; /* 0x010 */
43 struct {
44 uint32_t reserved10;
45 uint32_t ptr_iplb;
46 };
47 };
48 uint8_t pad1[0x80 - 0x18]; /* 0x018 */
49 uint32_t ext_params; /* 0x080 */
50 uint16_t cpu_addr; /* 0x084 */
51 uint16_t ext_int_code; /* 0x086 */
52 uint16_t svc_ilen; /* 0x088 */
53 uint16_t svc_code; /* 0x08a */
54 uint16_t pgm_ilen; /* 0x08c */
55 uint16_t pgm_code; /* 0x08e */
56 uint32_t data_exc_code; /* 0x090 */
57 uint16_t mon_class_num; /* 0x094 */
58 uint16_t per_perc_atmid; /* 0x096 */
59 uint64_t per_address; /* 0x098 */
60 uint8_t exc_access_id; /* 0x0a0 */
61 uint8_t per_access_id; /* 0x0a1 */
62 uint8_t op_access_id; /* 0x0a2 */
63 uint8_t ar_access_id; /* 0x0a3 */
64 uint8_t pad2[0xA8 - 0xA4]; /* 0x0a4 */
65 uint64_t trans_exc_code; /* 0x0a8 */
66 uint64_t monitor_code; /* 0x0b0 */
67 uint16_t subchannel_id; /* 0x0b8 */
68 uint16_t subchannel_nr; /* 0x0ba */
69 uint32_t io_int_parm; /* 0x0bc */
70 uint32_t io_int_word; /* 0x0c0 */
71 uint8_t pad3[0xc8 - 0xc4]; /* 0x0c4 */
72 uint32_t stfl_fac_list; /* 0x0c8 */
73 uint8_t pad4[0xe8 - 0xcc]; /* 0x0cc */
74 uint64_t mcic; /* 0x0e8 */
75 uint8_t pad5[0xf4 - 0xf0]; /* 0x0f0 */
76 uint32_t external_damage_code; /* 0x0f4 */
77 uint64_t failing_storage_address; /* 0x0f8 */
78 uint8_t pad6[0x110 - 0x100]; /* 0x100 */
79 uint64_t per_breaking_event_addr; /* 0x110 */
80 uint8_t pad7[0x120 - 0x118]; /* 0x118 */
81 PSW restart_old_psw; /* 0x120 */
82 PSW external_old_psw; /* 0x130 */
83 PSW svc_old_psw; /* 0x140 */
84 PSW program_old_psw; /* 0x150 */
85 PSW mcck_old_psw; /* 0x160 */
86 PSW io_old_psw; /* 0x170 */
87 uint8_t pad8[0x1a0 - 0x180]; /* 0x180 */
88 PSW restart_new_psw; /* 0x1a0 */
89 PSW external_new_psw; /* 0x1b0 */
90 PSW svc_new_psw; /* 0x1c0 */
91 PSW program_new_psw; /* 0x1d0 */
92 PSW mcck_new_psw; /* 0x1e0 */
93 PSW io_new_psw; /* 0x1f0 */
94 } __attribute__((packed, aligned(8192))) LowCore;
95
96 extern LowCore *lowcore;
97
98 /* Location of "S390EP" in a Linux binary (see arch/s390/boot/head.S) */
99 #define S390EP 0x10008
100
101 static inline void set_prefix(uint32_t address)
102 {
103 asm volatile("spx %0" : : "m" (address) : "memory");
104 }
105
106 static inline uint32_t store_prefix(void)
107 {
108 uint32_t address;
109
110 asm volatile("stpx %0" : "=m" (address));
111 return address;
112 }
113
114 #endif