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 long               size_t;
  22 typedef int                bool;
  23 typedef unsigned char      uint8_t;
  24 typedef unsigned short     uint16_t;
  25 typedef unsigned int       uint32_t;
  26 typedef unsigned long long uint64_t;
  27 typedef unsigned char      __u8;
  28 typedef unsigned short     __u16;
  29 typedef unsigned int       __u32;
  30 typedef unsigned long long __u64;
  31
  32 #define true 1
  33 #define false 0
  34 #define PAGE_SIZE 4096
  35
  36 #ifndef EIO
  37 #define EIO     1
  38 #endif
  39 #ifndef EBUSY
  40 #define EBUSY   2
  41 #endif
  42 #ifndef NULL
  43 #define NULL    0
  44 #endif
  45
  46 #include "cio.h"
  47
  48 /* start.s */
  49 void disabled_wait(void);
  50
  51 /* main.c */
  52 void virtio_panic(const char *string);
  53 void write_subsystem_identification(void);
  54 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  55 extern char ring_area[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
  56 extern uint64_t boot_value;
  57
  58 /* sclp-ascii.c */
  59 void sclp_print(const char *string);
  60 void sclp_setup(void);
  61
  62 /* virtio.c */
  63 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
  64                                  ulong subchan_id, void *load_addr);
  65 bool virtio_is_blk(struct subchannel_id schid);
  66 void virtio_setup_block(struct subchannel_id schid);
  67 int virtio_read(ulong sector, void *load_addr);
  68 int enable_mss_facility(void);
  69
  70 /* bootmap.c */
  71 void zipl_load(void);
  72
  73 static inline void *memset(void *s, int c, size_t n)
  74 {
  75     int i;
  76     unsigned char *p = s;
  77
  78     for (i = 0; i < n; i++) {
  79         p[i] = c;
  80     }
  81
  82     return s;
  83 }
  84
  85 static inline void fill_hex(char *out, unsigned char val)
  86 {
  87     const char hex[] = "0123456789abcdef";
  88
  89     out[0] = hex[(val >> 4) & 0xf];
  90     out[1] = hex[val & 0xf];
  91 }
  92
  93 static inline void fill_hex_val(char *out, void *ptr, unsigned size)
  94 {
  95     unsigned char *value = ptr;
  96     unsigned int i;
  97
  98     for (i = 0; i < size; i++) {
  99         fill_hex(&out[i*2], value[i]);
 100     }
 101 }
 102
 103 static inline void print_int(const char *desc, u64 addr)
 104 {
 105     char out[] = ": 0xffffffffffffffff\n";
 106
 107     fill_hex_val(&out[4], &addr, sizeof(addr));
 108
 109     sclp_print(desc);
 110     sclp_print(out);
 111 }
 112
 113 static inline void debug_print_int(const char *desc, u64 addr)
 114 {
 115 #ifdef DEBUG
 116     print_int(desc, addr);
 117 #endif
 118 }
 119
 120 static inline void debug_print_addr(const char *desc, void *p)
 121 {
 122 #ifdef DEBUG
 123     debug_print_int(desc, (unsigned int)(unsigned long)p);
 124 #endif
 125 }
 126
 127 /***********************************************
 128  *           Hypercall functions               *
 129  ***********************************************/
 130
 131 #define KVM_S390_VIRTIO_NOTIFY          0
 132 #define KVM_S390_VIRTIO_RESET           1
 133 #define KVM_S390_VIRTIO_SET_STATUS      2
 134 #define KVM_S390_VIRTIO_CCW_NOTIFY      3
 135
 136 static inline void yield(void)
 137 {
 138     asm volatile ("diag 0,0,0x44"
 139                   : :
 140                   : "memory", "cc");
 141 }
 142
 143 #define MAX_SECTOR_SIZE 4096
 144
 145 #endif /* S390_CCW_H */