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 unsigned char      __u8;
  22 typedef unsigned short     __u16;
  23 typedef unsigned int       __u32;
  24 typedef unsigned long long __u64;
  25
  26 #define true 1
  27 #define false 0
  28 #define PAGE_SIZE 4096
  29
  30 #define EIO     1
  31 #define EBUSY   2
  32 #define ENODEV  3
  33
  34 #ifndef NULL
  35 #define NULL    0
  36 #endif
  37 #ifndef MIN
  38 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
  39 #endif
  40 #ifndef MIN_NON_ZERO
  41 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
  42                             ((b) == 0 ? (a) : (MIN(a, b))))
  43 #endif
  44
  45 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
  46
  47 #include "cio.h"
  48 #include "iplb.h"
  49
  50 /* start.s */
  51 void disabled_wait(void) __attribute__ ((__noreturn__));
  52 void consume_sclp_int(void);
  53 void consume_io_int(void);
  54
  55 /* main.c */
  56 void write_subsystem_identification(void);
  57 void write_iplb_location(void);
  58 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  59 unsigned int get_loadparm_index(void);
  60
  61 /* sclp.c */
  62 void sclp_print(const char *string);
  63 void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask);
  64 void sclp_setup(void);
  65 void sclp_get_loadparm_ascii(char *loadparm);
  66 int sclp_read(char *str, size_t count);
  67
  68 /* virtio.c */
  69 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  70                                  ulong subchan_id, void *load_addr);
  71 bool virtio_is_supported(SubChannelId schid);
  72 int virtio_blk_setup_device(SubChannelId schid);
  73 int virtio_read(ulong sector, void *load_addr);
  74
  75 /* bootmap.c */
  76 void zipl_load(void);
  77
  78 /* jump2ipl.c */
  79 void write_reset_psw(uint64_t psw);
  80 void jump_to_IPL_code(uint64_t address);
  81 void jump_to_low_kernel(void);
  82
  83 /* menu.c */
  84 void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
  85 int menu_get_zipl_boot_index(const char *menu_data);
  86 bool menu_is_enabled_zipl(void);
  87 int menu_get_enum_boot_index(bool *valid_entries);
  88 bool menu_is_enabled_enum(void);
  89
  90 #define MAX_BOOT_ENTRIES  31
  91
  92 __attribute__ ((__noreturn__))
  93 static inline void panic(const char *string)
  94 {
  95     sclp_print(string);
  96     disabled_wait();
  97 }
  98
  99 static inline void fill_hex(char *out, unsigned char val)
 100 {
 101     const char hex[] = "0123456789abcdef";
 102
 103     out[0] = hex[(val >> 4) & 0xf];
 104     out[1] = hex[val & 0xf];
 105 }
 106
 107 static inline void fill_hex_val(char *out, void *ptr, unsigned size)
 108 {
 109     unsigned char *value = ptr;
 110     unsigned int i;
 111
 112     for (i = 0; i < size; i++) {
 113         fill_hex(&out[i*2], value[i]);
 114     }
 115 }
 116
 117 static inline void print_int(const char *desc, u64 addr)
 118 {
 119     char out[] = ": 0xffffffffffffffff\n";
 120
 121     fill_hex_val(&out[4], &addr, sizeof(addr));
 122
 123     sclp_print(desc);
 124     sclp_print(out);
 125 }
 126
 127 static inline void debug_print_int(const char *desc, u64 addr)
 128 {
 129 #ifdef DEBUG
 130     print_int(desc, addr);
 131 #endif
 132 }
 133
 134 static inline void debug_print_addr(const char *desc, void *p)
 135 {
 136 #ifdef DEBUG
 137     debug_print_int(desc, (unsigned int)(unsigned long)p);
 138 #endif
 139 }
 140
 141 /***********************************************
 142  *           Hypercall functions               *
 143  ***********************************************/
 144
 145 #define KVM_S390_VIRTIO_NOTIFY          0
 146 #define KVM_S390_VIRTIO_RESET           1
 147 #define KVM_S390_VIRTIO_SET_STATUS      2
 148 #define KVM_S390_VIRTIO_CCW_NOTIFY      3
 149
 150 #define MAX_SECTOR_SIZE 4096
 151
 152 static inline void IPL_assert(bool term, const char *message)
 153 {
 154     if (!term) {
 155         sclp_print("\n! ");
 156         sclp_print(message);
 157         panic(" !\n"); /* no return */
 158     }
 159 }
 160
 161 static inline void IPL_check(bool term, const char *message)
 162 {
 163     if (!term) {
 164         sclp_print("\n! WARNING: ");
 165         sclp_print(message);
 166         sclp_print(" !\n");
 167     }
 168 }
 169
 170 extern const unsigned char ebc2asc[256];
 171 static inline void ebcdic_to_ascii(const char *src,
 172                                    char *dst,
 173                                    unsigned int size)
 174 {
 175     unsigned int i;
 176
 177     for (i = 0; i < size; i++) {
 178         unsigned c = src[i];
 179         dst[i] = ebc2asc[c];
 180     }
 181 }
 182
 183 #endif /* S390_CCW_H */