summaryrefslogtreecommitdiff
path: root/pc-bios/s390-ccw/s390-ccw.h
blob: 20892748427ac10dcbfc788142d4f9f7f28ef21b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*
 * S390 CCW boot loader
 *
 * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
 * your option) any later version. See the COPYING file in the top-level
 * directory.
 */

#ifndef S390_CCW_H
#define S390_CCW_H

/* #define DEBUG */

typedef unsigned char      u8;
typedef unsigned short     u16;
typedef unsigned int       u32;
typedef unsigned long long u64;
typedef unsigned long      ulong;
typedef long               size_t;
typedef int                bool;
typedef unsigned char      uint8_t;
typedef unsigned short     uint16_t;
typedef unsigned int       uint32_t;
typedef unsigned long long uint64_t;
typedef unsigned char      __u8;
typedef unsigned short     __u16;
typedef unsigned int       __u32;
typedef unsigned long long __u64;

#define true 1
#define false 0
#define PAGE_SIZE 4096

#ifndef EIO
#define EIO     1
#endif
#ifndef EBUSY
#define EBUSY   2
#endif
#ifndef NULL
#define NULL    0
#endif
#ifndef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MIN_NON_ZERO
#define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
                            ((b) == 0 ? (a) : (MIN(a, b))))
#endif

#include "cio.h"
#include "iplb.h"

typedef struct irb Irb;
typedef struct ccw1 Ccw1;
typedef struct cmd_orb CmdOrb;
typedef struct schib Schib;
typedef struct chsc_area_sda ChscAreaSda;
typedef struct senseid SenseId;
typedef struct subchannel_id SubChannelId;

/* start.s */
void disabled_wait(void);
void consume_sclp_int(void);

/* main.c */
void panic(const char *string);
void write_subsystem_identification(void);
extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
unsigned int get_loadparm_index(void);

/* sclp.c */
void sclp_print(const char *string);
void sclp_setup(void);
void sclp_get_loadparm_ascii(char *loadparm);

/* virtio.c */
unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
                                 ulong subchan_id, void *load_addr);
bool virtio_is_supported(SubChannelId schid);
void virtio_setup_device(SubChannelId schid);
int virtio_read(ulong sector, void *load_addr);
int enable_mss_facility(void);
ulong get_second(void);

/* bootmap.c */
void zipl_load(void);

static inline void *memset(void *s, int c, size_t n)
{
    int i;
    unsigned char *p = s;

    for (i = 0; i < n; i++) {
        p[i] = c;
    }

    return s;
}

static inline void fill_hex(char *out, unsigned char val)
{
    const char hex[] = "0123456789abcdef";

    out[0] = hex[(val >> 4) & 0xf];
    out[1] = hex[val & 0xf];
}

static inline void fill_hex_val(char *out, void *ptr, unsigned size)
{
    unsigned char *value = ptr;
    unsigned int i;

    for (i = 0; i < size; i++) {
        fill_hex(&out[i*2], value[i]);
    }
}

static inline void print_int(const char *desc, u64 addr)
{
    char out[] = ": 0xffffffffffffffff\n";

    fill_hex_val(&out[4], &addr, sizeof(addr));

    sclp_print(desc);
    sclp_print(out);
}

static inline void debug_print_int(const char *desc, u64 addr)
{
#ifdef DEBUG
    print_int(desc, addr);
#endif
}

static inline void debug_print_addr(const char *desc, void *p)
{
#ifdef DEBUG
    debug_print_int(desc, (unsigned int)(unsigned long)p);
#endif
}

/***********************************************
 *           Hypercall functions               *
 ***********************************************/

#define KVM_S390_VIRTIO_NOTIFY          0
#define KVM_S390_VIRTIO_RESET           1
#define KVM_S390_VIRTIO_SET_STATUS      2
#define KVM_S390_VIRTIO_CCW_NOTIFY      3

static inline void yield(void)
{
    asm volatile ("diag 0,0,0x44"
                  : :
                  : "memory", "cc");
}

#define MAX_SECTOR_SIZE 4096

static inline void sleep(unsigned int seconds)
{
    ulong target = get_second() + seconds;

    while (get_second() < target) {
        yield();
    }
}

static inline void *memcpy(void *s1, const void *s2, size_t n)
{
    uint8_t *p1 = s1;
    const uint8_t *p2 = s2;

    while (n--) {
        p1[n] = p2[n];
    }
    return s1;
}

static inline void IPL_assert(bool term, const char *message)
{
    if (!term) {
        sclp_print("\n! ");
        sclp_print(message);
        panic(" !\n"); /* no return */
    }
}

static inline void IPL_check(bool term, const char *message)
{
    if (!term) {
        sclp_print("\n! WARNING: ");
        sclp_print(message);
        sclp_print(" !\n");
    }
}

extern const unsigned char ebc2asc[256];
static inline void ebcdic_to_ascii(const char *src,
                                   char *dst,
                                   unsigned int size)
{
    unsigned int i;

    for (i = 0; i < size; i++) {
        unsigned c = src[i];
        dst[i] = ebc2asc[c];
    }
}

#endif /* S390_CCW_H */