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