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;
  20
  21#define true 1
  22#define false 0
  23#define PAGE_SIZE 4096
  24
  25#define EIO     1
  26#define EBUSY   2
  27#define ENODEV  3
  28
  29#ifndef NULL
  30#define NULL    0
  31#endif
  32#ifndef MIN
  33#define MIN(a, b) (((a) < (b)) ? (a) : (b))
  34#endif
  35#ifndef MIN_NON_ZERO
  36#define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
  37                            ((b) == 0 ? (a) : (MIN(a, b))))
  38#endif
  39
  40#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
  41
  42#include "cio.h"
  43#include "iplb.h"
  44
  45/* start.s */
  46void disabled_wait(void) __attribute__ ((__noreturn__));
  47void consume_sclp_int(void);
  48void consume_io_int(void);
  49
  50/* main.c */
  51void write_subsystem_identification(void);
  52void write_iplb_location(void);
  53unsigned int get_loadparm_index(void);
  54void main(void);
  55
  56/* sclp.c */
  57void sclp_print(const char *string);
  58void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask);
  59void sclp_setup(void);
  60void sclp_get_loadparm_ascii(char *loadparm);
  61int sclp_read(char *str, size_t count);
  62
  63/* virtio.c */
  64unsigned long virtio_load_direct(unsigned long rec_list1, unsigned long rec_list2,
  65                                 unsigned long subchan_id, void *load_addr);
  66bool virtio_is_supported(SubChannelId schid);
  67int virtio_blk_setup_device(SubChannelId schid);
  68int virtio_read(unsigned long sector, void *load_addr);
  69
  70/* bootmap.c */
  71void zipl_load(void);
  72
  73/* jump2ipl.c */
  74void write_reset_psw(uint64_t psw);
  75void jump_to_IPL_code(uint64_t address);
  76void jump_to_low_kernel(void);
  77
  78/* menu.c */
  79void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout);
  80int menu_get_zipl_boot_index(const char *menu_data);
  81bool menu_is_enabled_zipl(void);
  82int menu_get_enum_boot_index(bool *valid_entries);
  83bool menu_is_enabled_enum(void);
  84
  85#define MAX_BOOT_ENTRIES  31
  86
  87__attribute__ ((__noreturn__))
  88static inline void panic(const char *string)
  89{
  90    sclp_print(string);
  91    disabled_wait();
  92}
  93
  94static 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
 102static 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
 112static 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
 122static inline void debug_print_int(const char *desc, u64 addr)
 123{
 124#ifdef DEBUG
 125    print_int(desc, addr);
 126#endif
 127}
 128
 129static 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#define MAX_SECTOR_SIZE 4096
 146
 147static inline void IPL_assert(bool term, const char *message)
 148{
 149    if (!term) {
 150        sclp_print("\n! ");
 151        sclp_print(message);
 152        panic(" !\n"); /* no return */
 153    }
 154}
 155
 156static inline void IPL_check(bool term, const char *message)
 157{
 158    if (!term) {
 159        sclp_print("\n! WARNING: ");
 160        sclp_print(message);
 161        sclp_print(" !\n");
 162    }
 163}
 164
 165extern const unsigned char ebc2asc[256];
 166static inline void ebcdic_to_ascii(const char *src,
 167                                   char *dst,
 168                                   unsigned int size)
 169{
 170    unsigned int i;
 171
 172    for (i = 0; i < size; i++) {
 173        unsigned c = src[i];
 174        dst[i] = ebc2asc[c];
 175    }
 176}
 177
 178#endif /* S390_CCW_H */
 179