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
  48 typedef struct irb Irb;
  49 typedef struct ccw1 Ccw1;
  50 typedef struct cmd_orb CmdOrb;
  51 typedef struct schib Schib;
  52 typedef struct chsc_area_sda ChscAreaSda;
  53 typedef struct senseid SenseId;
  54 typedef struct subchannel_id SubChannelId;
  55
  56 /* start.s */
  57 void disabled_wait(void);
  58 void consume_sclp_int(void);
  59
  60 /* main.c */
  61 void panic(const char *string);
  62 void write_subsystem_identification(void);
  63 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  64 extern uint64_t boot_value;
  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 */