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 #ifndef MIN
  46 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  47 #endif
  48 #ifndef MIN_NON_ZERO
  49 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
  50                             ((b) == 0 ? (a) : (MIN(a, b))))
  51 #endif
  52
  53 #include "cio.h"
  54 #include "iplb.h"
  55
  56 typedef struct irb Irb;
  57 typedef struct ccw1 Ccw1;
  58 typedef struct cmd_orb CmdOrb;
  59 typedef struct schib Schib;
  60 typedef struct chsc_area_sda ChscAreaSda;
  61 typedef struct senseid SenseId;
  62 typedef struct subchannel_id SubChannelId;
  63
  64 /* start.s */
  65 void disabled_wait(void);
  66 void consume_sclp_int(void);
  67
  68 /* main.c */
  69 void panic(const char *string);
  70 void write_subsystem_identification(void);
  71 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  72 unsigned int get_loadparm_index(void);
  73
  74 /* sclp.c */
  75 void sclp_print(const char *string);
  76 void sclp_setup(void);
  77 void sclp_get_loadparm_ascii(char *loadparm);
  78
  79 /* virtio.c */
  80 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  81                                  ulong subchan_id, void *load_addr);
  82 bool virtio_is_supported(SubChannelId schid);
  83 void virtio_setup_device(SubChannelId schid);
  84 int virtio_read(ulong sector, void *load_addr);
  85 int enable_mss_facility(void);
  86 ulong get_second(void);
  87
  88 /* bootmap.c */
  89 void zipl_load(void);
  90
  91 static inline void *memset(void *s, int c, size_t n)
  92 {
  93     int i;
  94     unsigned char *p = s;
  95
  96     for (i = 0; i < n; i++) {
  97         p[i] = c;
  98     }
  99
 100     return s;
 101 }
 102
 103 static inline void fill_hex(char *out, unsigned char val)
 104 {
 105     const char hex[] = "0123456789abcdef";
 106
 107     out[0] = hex[(val >> 4) & 0xf];
 108     out[1] = hex[val & 0xf];
 109 }
 110
 111 static inline void fill_hex_val(char *out, void *ptr, unsigned size)
 112 {
 113     unsigned char *value = ptr;
 114     unsigned int i;
 115
 116     for (i = 0; i < size; i++) {
 117         fill_hex(&out[i*2], value[i]);
 118     }
 119 }
 120
 121 static inline void print_int(const char *desc, u64 addr)
 122 {
 123     char out[] = ": 0xffffffffffffffff\n";
 124
 125     fill_hex_val(&out[4], &addr, sizeof(addr));
 126
 127     sclp_print(desc);
 128     sclp_print(out);
 129 }
 130
 131 static inline void debug_print_int(const char *desc, u64 addr)
 132 {
 133 #ifdef DEBUG
 134     print_int(desc, addr);
 135 #endif
 136 }
 137
 138 static inline void debug_print_addr(const char *desc, void *p)
 139 {
 140 #ifdef DEBUG
 141     debug_print_int(desc, (unsigned int)(unsigned long)p);
 142 #endif
 143 }
 144
 145 /***********************************************
 146  *           Hypercall functions               *
 147  ***********************************************/
 148
 149 #define KVM_S390_VIRTIO_NOTIFY          0
 150 #define KVM_S390_VIRTIO_RESET           1
 151 #define KVM_S390_VIRTIO_SET_STATUS      2
 152 #define KVM_S390_VIRTIO_CCW_NOTIFY      3
 153
 154 static inline void yield(void)
 155 {
 156     asm volatile ("diag 0,0,0x44"
 157                   : :
 158                   : "memory", "cc");
 159 }
 160
 161 #define MAX_SECTOR_SIZE 4096
 162
 163 static inline void sleep(unsigned int seconds)
 164 {
 165     ulong target = get_second() + seconds;
 166
 167     while (get_second() < target) {
 168         yield();
 169     }
 170 }
 171
 172 static inline void *memcpy(void *s1, const void *s2, size_t n)
 173 {
 174     uint8_t *p1 = s1;
 175     const uint8_t *p2 = s2;
 176
 177     while (n--) {
 178         p1[n] = p2[n];
 179     }
 180     return s1;
 181 }
 182
 183 static inline void IPL_assert(bool term, const char *message)
 184 {
 185     if (!term) {
 186         sclp_print("\n! ");
 187         sclp_print(message);
 188         panic(" !\n"); /* no return */
 189     }
 190 }
 191
 192 static inline void IPL_check(bool term, const char *message)
 193 {
 194     if (!term) {
 195         sclp_print("\n! WARNING: ");
 196         sclp_print(message);
 197         sclp_print(" !\n");
 198     }
 199 }
 200
 201 extern const unsigned char ebc2asc[256];
 202 static inline void ebcdic_to_ascii(const char *src,
 203                                    char *dst,
 204                                    unsigned int size)
 205 {
 206     unsigned int i;
 207
 208     for (i = 0; i < size; i++) {
 209         unsigned c = src[i];
 210         dst[i] = ebc2asc[c];
 211     }
 212 }
 213
 214 #endif /* S390_CCW_H */