Merge remote-tracking branch 'remotes/cody/tags/block-pull-request' into staging
[qemu.git] / pc-bios / s390-ccw / s390-ccw.h
1 /*
2 * S390 CCW boot loader
3 *
4 * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
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_CCW_H
12 #define S390_CCW_H
13
14 /* #define DEBUG */
15
16 typedef unsigned char u8;
17 typedef unsigned short u16;
18 typedef unsigned int u32;
19 typedef unsigned long long u64;
20 typedef unsigned long ulong;
21 typedef long size_t;
22 typedef int bool;
23 typedef unsigned char uint8_t;
24 typedef unsigned short uint16_t;
25 typedef unsigned int uint32_t;
26 typedef unsigned long long uint64_t;
27 typedef unsigned char __u8;
28 typedef unsigned short __u16;
29 typedef unsigned int __u32;
30 typedef unsigned long long __u64;
31
32 #define true 1
33 #define false 0
34 #define PAGE_SIZE 4096
35
36 #ifndef EIO
37 #define EIO 1
38 #endif
39 #ifndef EBUSY
40 #define EBUSY 2
41 #endif
42 #ifndef NULL
43 #define NULL 0
44 #endif
45
46 #include "cio.h"
47 #include "iplb.h"
48
49 typedef struct irb Irb;
50 typedef struct ccw1 Ccw1;
51 typedef struct cmd_orb CmdOrb;
52 typedef struct schib Schib;
53 typedef struct chsc_area_sda ChscAreaSda;
54 typedef struct senseid SenseId;
55 typedef struct subchannel_id SubChannelId;
56
57 /* start.s */
58 void disabled_wait(void);
59 void consume_sclp_int(void);
60
61 /* main.c */
62 void panic(const char *string);
63 void write_subsystem_identification(void);
64 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
65
66 /* sclp-ascii.c */
67 void sclp_print(const char *string);
68 void sclp_setup(void);
69
70 /* virtio.c */
71 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
72 ulong subchan_id, void *load_addr);
73 bool virtio_is_supported(SubChannelId schid);
74 void virtio_setup_device(SubChannelId schid);
75 int virtio_read(ulong sector, void *load_addr);
76 int enable_mss_facility(void);
77 ulong get_second(void);
78
79 /* bootmap.c */
80 void zipl_load(void);
81
82 static inline void *memset(void *s, int c, size_t n)
83 {
84 int i;
85 unsigned char *p = s;
86
87 for (i = 0; i < n; i++) {
88 p[i] = c;
89 }
90
91 return s;
92 }
93
94 static inline void fill_hex(char *out, unsigned char val)
95 {
96 const char hex[] = "0123456789abcdef";
97
98 out[0] = hex[(val >> 4) & 0xf];
99 out[1] = hex[val & 0xf];
100 }
101
102 static inline void fill_hex_val(char *out, void *ptr, unsigned size)
103 {
104 unsigned char *value = ptr;
105 unsigned int i;
106
107 for (i = 0; i < size; i++) {
108 fill_hex(&out[i*2], value[i]);
109 }
110 }
111
112 static inline void print_int(const char *desc, u64 addr)
113 {
114 char out[] = ": 0xffffffffffffffff\n";
115
116 fill_hex_val(&out[4], &addr, sizeof(addr));
117
118 sclp_print(desc);
119 sclp_print(out);
120 }
121
122 static inline void debug_print_int(const char *desc, u64 addr)
123 {
124 #ifdef DEBUG
125 print_int(desc, addr);
126 #endif
127 }
128
129 static inline void debug_print_addr(const char *desc, void *p)
130 {
131 #ifdef DEBUG
132 debug_print_int(desc, (unsigned int)(unsigned long)p);
133 #endif
134 }
135
136 /***********************************************
137 * Hypercall functions *
138 ***********************************************/
139
140 #define KVM_S390_VIRTIO_NOTIFY 0
141 #define KVM_S390_VIRTIO_RESET 1
142 #define KVM_S390_VIRTIO_SET_STATUS 2
143 #define KVM_S390_VIRTIO_CCW_NOTIFY 3
144
145 static inline void yield(void)
146 {
147 asm volatile ("diag 0,0,0x44"
148 : :
149 : "memory", "cc");
150 }
151
152 #define MAX_SECTOR_SIZE 4096
153
154 static inline void sleep(unsigned int seconds)
155 {
156 ulong target = get_second() + seconds;
157
158 while (get_second() < target) {
159 yield();
160 }
161 }
162
163 static inline void *memcpy(void *s1, const void *s2, size_t n)
164 {
165 uint8_t *p1 = s1;
166 const uint8_t *p2 = s2;
167
168 while (n--) {
169 p1[n] = p2[n];
170 }
171 return s1;
172 }
173
174 static inline void IPL_assert(bool term, const char *message)
175 {
176 if (!term) {
177 sclp_print("\n! ");
178 sclp_print(message);
179 panic(" !\n"); /* no return */
180 }
181 }
182
183 static inline void IPL_check(bool term, const char *message)
184 {
185 if (!term) {
186 sclp_print("\n! WARNING: ");
187 sclp_print(message);
188 sclp_print(" !\n");
189 }
190 }
191
192 #endif /* S390_CCW_H */