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);
  60
  61/* sclp.c */
  62void sclp_print(const char *string);
  63void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask);
  64void sclp_setup(void);
  65void sclp_get_loadparm_ascii(char *loadparm);
  66int sclp_read(char *str, size_t count);
  67
  68/* virtio.c */
  69unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  70                                 ulong subchan_id, void *load_addr);
  71bool virtio_is_supported(SubChannelId schid);
  72int virtio_blk_setup_device(SubChannelId schid);
  73int virtio_read(ulong sector, void *load_addr);
  74
  75/* bootmap.c */
  76void zipl_load(void);
  77
  78/* jump2ipl.c */
  79void write_reset_psw(uint64_t psw);
  80void jump_to_IPL_code(uint64_t address);
  81void jump_to_low_kernel(void);
  82
  83/* menu.c */
  84void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
  85int menu_get_zipl_boot_index(const char *menu_data);
  86bool menu_is_enabled_zipl(void);
  87int menu_get_enum_boot_index(bool *valid_entries);
  88bool menu_is_enabled_enum(void);
  89
  90#define MAX_BOOT_ENTRIES  31
  91
  92__attribute__ ((__noreturn__))
  93static inline void panic(const char *string)
  94{
  95    sclp_print(string);
  96    disabled_wait();
  97}
  98
  99static 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
 107static 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
 117static 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
 127static inline void debug_print_int(const char *desc, u64 addr)
 128{
 129#ifdef DEBUG
 130    print_int(desc, addr);
 131#endif
 132}
 133
 134static 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
 152static 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
 161static 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
 170extern const unsigned char ebc2asc[256];
 171static 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 */
 184