LXR qemu/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
  16typedef unsigned char      u8;
  17typedef unsigned short     u16;
  18typedef unsigned int       u32;
  19typedef unsigned long long u64;
  20typedef unsigned long      ulong;
  21typedef unsigned char      __u8;
  22typedef unsigned short     __u16;
  23typedef unsigned int       __u32;
  24typedef unsigned long long __u64;
  25
  26#define true 1
  27#define false 0
  28#define PAGE_SIZE 4096
  29
  30#ifndef EIO
  31#define EIO     1
  32#endif
  33#ifndef EBUSY
  34#define EBUSY   2
  35#endif
  36#ifndef NULL
  37#define NULL    0
  38#endif
  39#ifndef MIN
  40#define MIN(a, b) (((a) < (b)) ? (a) : (b))
  41#endif
  42#ifndef MIN_NON_ZERO
  43#define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
  44                            ((b) == 0 ? (a) : (MIN(a, b))))
  45#endif
  46
  47#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
  48
  49#include "cio.h"
  50#include "iplb.h"
  51
  52/* start.s */
  53void disabled_wait(void);
  54void consume_sclp_int(void);
  55void consume_io_int(void);
  56
  57/* main.c */
  58void panic(const char *string);
  59void write_subsystem_identification(void);
  60extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  61unsigned int get_loadparm_index(void);
  62
  63/* sclp.c */
  64void sclp_print(const char *string);
  65void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask);
  66void sclp_setup(void);
  67void sclp_get_loadparm_ascii(char *loadparm);
  68int sclp_read(char *str, size_t count);
  69
  70/* virtio.c */
  71unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  72                                 ulong subchan_id, void *load_addr);
  73bool virtio_is_supported(SubChannelId schid);
  74void virtio_blk_setup_device(SubChannelId schid);
  75int virtio_read(ulong sector, void *load_addr);
  76u64 get_clock(void);
  77ulong get_second(void);
  78
  79/* bootmap.c */
  80void zipl_load(void);
  81
  82/* jump2ipl.c */
  83void jump_to_IPL_code(uint64_t address);
  84void jump_to_low_kernel(void);
  85
  86/* menu.c */
  87void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
  88int menu_get_zipl_boot_index(const char *menu_data);
  89bool menu_is_enabled_zipl(void);
  90int menu_get_enum_boot_index(bool *valid_entries);
  91bool menu_is_enabled_enum(void);
  92
  93#define MAX_BOOT_ENTRIES  31
  94
  95static inline void fill_hex(char *out, unsigned char val)
  96{
  97    const char hex[] = "0123456789abcdef";
  98
  99    out[0] = hex[(val >> 4) & 0xf];
 100    out[1] = hex[val & 0xf];
 101}
 102
 103static inline void fill_hex_val(char *out, void *ptr, unsigned size)
 104{
 105    unsigned char *value = ptr;
 106    unsigned int i;
 107
 108    for (i = 0; i < size; i++) {
 109        fill_hex(&out[i*2], value[i]);
 110    }
 111}
 112
 113static inline void print_int(const char *desc, u64 addr)
 114{
 115    char out[] = ": 0xffffffffffffffff\n";
 116
 117    fill_hex_val(&out[4], &addr, sizeof(addr));
 118
 119    sclp_print(desc);
 120    sclp_print(out);
 121}
 122
 123static inline void debug_print_int(const char *desc, u64 addr)
 124{
 125#ifdef DEBUG
 126    print_int(desc, addr);
 127#endif
 128}
 129
 130static inline void debug_print_addr(const char *desc, void *p)
 131{
 132#ifdef DEBUG
 133    debug_print_int(desc, (unsigned int)(unsigned long)p);
 134#endif
 135}
 136
 137/***********************************************
 138 *           Hypercall functions               *
 139 ***********************************************/
 140
 141#define KVM_S390_VIRTIO_NOTIFY          0
 142#define KVM_S390_VIRTIO_RESET           1
 143#define KVM_S390_VIRTIO_SET_STATUS      2
 144#define KVM_S390_VIRTIO_CCW_NOTIFY      3
 145
 146static inline void yield(void)
 147{
 148    asm volatile ("diag 0,0,0x44"
 149                  : :
 150                  : "memory", "cc");
 151}
 152
 153#define MAX_SECTOR_SIZE 4096
 154
 155static inline void sleep(unsigned int seconds)
 156{
 157    ulong target = get_second() + seconds;
 158
 159    while (get_second() < target) {
 160        yield();
 161    }
 162}
 163
 164static inline void IPL_assert(bool term, const char *message)
 165{
 166    if (!term) {
 167        sclp_print("\n! ");
 168        sclp_print(message);
 169        panic(" !\n"); /* no return */
 170    }
 171}
 172
 173static inline void IPL_check(bool term, const char *message)
 174{
 175    if (!term) {
 176        sclp_print("\n! WARNING: ");
 177        sclp_print(message);
 178        sclp_print(" !\n");
 179    }
 180}
 181
 182extern const unsigned char ebc2asc[256];
 183static inline void ebcdic_to_ascii(const char *src,
 184                                   char *dst,
 185                                   unsigned int size)
 186{
 187    unsigned int i;
 188
 189    for (i = 0; i < size; i++) {
 190        unsigned c = src[i];
 191        dst[i] = ebc2asc[c];
 192    }
 193}
 194
 195#endif /* S390_CCW_H */
 196