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 #include "iplb.h" 48 49 typedef struct irb Irb; 50 typedef struct ccw1 Ccw1; 51 typedef struct cmd_orb CmdOrb; 52 typedef struct schib Schib; 53 typedef struct chsc_area_sda ChscAreaSda; 54 typedef struct senseid SenseId; 55 typedef struct subchannel_id SubChannelId; 56 57 /* start.s */ 58 void disabled_wait(void); 59 void consume_sclp_int(void); 60 61 /* main.c */ 62 void panic(const char *string); 63 void write_subsystem_identification(void); 64 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 65 unsigned int get_loadparm_index(void); 66 67 /* sclp.c */ 68 void sclp_print(const char *string); 69 void sclp_setup(void); 70 void sclp_get_loadparm_ascii(char *loadparm); 71 72 /* virtio.c */ 73 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 74 ulong subchan_id, void *load_addr); 75 bool virtio_is_supported(SubChannelId schid); 76 void virtio_setup_device(SubChannelId schid); 77 int virtio_read(ulong sector, void *load_addr); 78 int enable_mss_facility(void); 79 ulong get_second(void); 80 81 /* bootmap.c */ 82 void zipl_load(void); 83 84 static inline void *memset(void *s, int c, size_t n) 85 { 86 int i; 87 unsigned char *p = s; 88 89 for (i = 0; i < n; i++) { 90 p[i] = c; 91 } 92 93 return s; 94 } 95 96 static inline void fill_hex(char *out, unsigned char val) 97 { 98 const char hex[] = "0123456789abcdef"; 99 100 out[0] = hex[(val >> 4) & 0xf]; 101 out[1] = hex[val & 0xf]; 102 } 103 104 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 105 { 106 unsigned char *value = ptr; 107 unsigned int i; 108 109 for (i = 0; i < size; i++) { 110 fill_hex(&out[i*2], value[i]); 111 } 112 } 113 114 static inline void print_int(const char *desc, u64 addr) 115 { 116 char out[] = ": 0xffffffffffffffff\n"; 117 118 fill_hex_val(&out[4], &addr, sizeof(addr)); 119 120 sclp_print(desc); 121 sclp_print(out); 122 } 123 124 static inline void debug_print_int(const char *desc, u64 addr) 125 { 126 #ifdef DEBUG 127 print_int(desc, addr); 128 #endif 129 } 130 131 static inline void debug_print_addr(const char *desc, void *p) 132 { 133 #ifdef DEBUG 134 debug_print_int(desc, (unsigned int)(unsigned long)p); 135 #endif 136 } 137 138 /*********************************************** 139 * Hypercall functions * 140 ***********************************************/ 141 142 #define KVM_S390_VIRTIO_NOTIFY 0 143 #define KVM_S390_VIRTIO_RESET 1 144 #define KVM_S390_VIRTIO_SET_STATUS 2 145 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 146 147 static inline void yield(void) 148 { 149 asm volatile ("diag 0,0,0x44" 150 : : 151 : "memory", "cc"); 152 } 153 154 #define MAX_SECTOR_SIZE 4096 155 156 static inline void sleep(unsigned int seconds) 157 { 158 ulong target = get_second() + seconds; 159 160 while (get_second() < target) { 161 yield(); 162 } 163 } 164 165 static inline void *memcpy(void *s1, const void *s2, size_t n) 166 { 167 uint8_t *p1 = s1; 168 const uint8_t *p2 = s2; 169 170 while (n--) { 171 p1[n] = p2[n]; 172 } 173 return s1; 174 } 175 176 static inline void IPL_assert(bool term, const char *message) 177 { 178 if (!term) { 179 sclp_print("\n! "); 180 sclp_print(message); 181 panic(" !\n"); /* no return */ 182 } 183 } 184 185 static inline void IPL_check(bool term, const char *message) 186 { 187 if (!term) { 188 sclp_print("\n! WARNING: "); 189 sclp_print(message); 190 sclp_print(" !\n"); 191 } 192 } 193 194 extern const unsigned char ebc2asc[256]; 195 static inline void ebcdic_to_ascii(const char *src, 196 char *dst, 197 unsigned int size) 198 { 199 unsigned int i; 200 201 for (i = 0; i < size; i++) { 202 unsigned c = src[i]; 203 dst[i] = ebc2asc[c]; 204 } 205 } 206 207 #endif /* S390_CCW_H */ 208