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#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 */
  51void disabled_wait(void) __attribute__ ((__noreturn__));
  52void consume_sclp_int(void);
  53void consume_io_int(void);
  54
  55/* main.c */
  56void write_subsystem_identification(void);
  57void write_iplb_location(void);
  58extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  59unsigned int get_loadparm_index(void);
  60void main(void);
  61
  62/* sclp.c */
  63void sclp_print(const char *string);
  64void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask);
  65void sclp_setup(void);
  66void sclp_get_loadparm_ascii(char *loadparm);
  67int sclp_read(char *str, size_t count);
  68
  69/* virtio.c */
  70unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  71                                 ulong subchan_id, void *load_addr);
  72bool virtio_is_supported(SubChannelId schid);
  73int virtio_blk_setup_device(SubChannelId schid);
  74int virtio_read(ulong sector, void *load_addr);
  75
  76/* bootmap.c */
  77void zipl_load(void);
  78
  79/* jump2ipl.c */
  80void write_reset_psw(uint64_t psw);
  81void jump_to_IPL_code(uint64_t address);
  82void jump_to_low_kernel(void);
  83
  84/* menu.c */
  85void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
  86int menu_get_zipl_boot_index(const char *menu_data);
  87bool menu_is_enabled_zipl(void);
  88int menu_get_enum_boot_index(bool *valid_entries);
  89bool menu_is_enabled_enum(void);
  90
  91#define MAX_BOOT_ENTRIES  31
  92
  93__attribute__ ((__noreturn__))
  94static inline void panic(const char *string)
  95{
  96    sclp_print(string);
  97    disabled_wait();
  98}
  99
 100static inline void fill_hex(char *out, unsigned char val)
 101{
 102    const char hex[] = "0123456789abcdef";
 103
 104    out[0] = hex[(val >> 4) & 0xf];
 105    out[1] = hex[val & 0xf];
 106}
 107
 108static inline void fill_hex_val(char *out, void *ptr, unsigned size)
 109{
 110    unsigned char *value = ptr;
 111    unsigned int i;
 112
 113    for (i = 0; i < size; i++) {
 114        fill_hex(&out[i*2], value[i]);
 115    }
 116}
 117
 118static inline void print_int(const char *desc, u64 addr)
 119{
 120    char out[] = ": 0xffffffffffffffff\n";
 121
 122    fill_hex_val(&out[4], &addr, sizeof(addr));
 123
 124    sclp_print(desc);
 125    sclp_print(out);
 126}
 127
 128static inline void debug_print_int(const char *desc, u64 addr)
 129{
 130#ifdef DEBUG
 131    print_int(desc, addr);
 132#endif
 133}
 134
 135static inline void debug_print_addr(const char *desc, void *p)
 136{
 137#ifdef DEBUG
 138    debug_print_int(desc, (unsigned int)(unsigned long)p);
 139#endif
 140}
 141
 142/***********************************************
 143 *           Hypercall functions               *
 144 ***********************************************/
 145
 146#define KVM_S390_VIRTIO_NOTIFY          0
 147#define KVM_S390_VIRTIO_RESET           1
 148#define KVM_S390_VIRTIO_SET_STATUS      2
 149#define KVM_S390_VIRTIO_CCW_NOTIFY      3
 150
 151#define MAX_SECTOR_SIZE 4096
 152
 153static inline void IPL_assert(bool term, const char *message)
 154{
 155    if (!term) {
 156        sclp_print("\n! ");
 157        sclp_print(message);
 158        panic(" !\n"); /* no return */
 159    }
 160}
 161
 162static inline void IPL_check(bool term, const char *message)
 163{
 164    if (!term) {
 165        sclp_print("\n! WARNING: ");
 166        sclp_print(message);
 167        sclp_print(" !\n");
 168    }
 169}
 170
 171extern const unsigned char ebc2asc[256];
 172static inline void ebcdic_to_ascii(const char *src,
 173                                   char *dst,
 174                                   unsigned int size)
 175{
 176    unsigned int i;
 177
 178    for (i = 0; i < size; i++) {
 179        unsigned c = src[i];
 180        dst[i] = ebc2asc[c];
 181    }
 182}
 183
 184#endif /* S390_CCW_H */
 185