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 #ifndef MIN 46 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 47 #endif 48 #ifndef MIN_NON_ZERO 49 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ 50 ((b) == 0 ? (a) : (MIN(a, b)))) 51 #endif 52 53 #include "cio.h" 54 #include "iplb.h" 55 56 typedef struct irb Irb; 57 typedef struct ccw1 Ccw1; 58 typedef struct cmd_orb CmdOrb; 59 typedef struct schib Schib; 60 typedef struct chsc_area_sda ChscAreaSda; 61 typedef struct senseid SenseId; 62 typedef struct subchannel_id SubChannelId; 63 64 /* start.s */ 65 void disabled_wait(void); 66 void consume_sclp_int(void); 67 68 /* main.c */ 69 void panic(const char *string); 70 void write_subsystem_identification(void); 71 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 72 unsigned int get_loadparm_index(void); 73 74 /* sclp.c */ 75 void sclp_print(const char *string); 76 void sclp_setup(void); 77 void sclp_get_loadparm_ascii(char *loadparm); 78 79 /* virtio.c */ 80 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 81 ulong subchan_id, void *load_addr); 82 bool virtio_is_supported(SubChannelId schid); 83 void virtio_setup_device(SubChannelId schid); 84 int virtio_read(ulong sector, void *load_addr); 85 int enable_mss_facility(void); 86 ulong get_second(void); 87 88 /* bootmap.c */ 89 void zipl_load(void); 90 91 static inline void *memset(void *s, int c, size_t n) 92 { 93 int i; 94 unsigned char *p = s; 95 96 for (i = 0; i < n; i++) { 97 p[i] = c; 98 } 99 100 return s; 101 } 102 103 static inline void fill_hex(char *out, unsigned char val) 104 { 105 const char hex[] = "0123456789abcdef"; 106 107 out[0] = hex[(val >> 4) & 0xf]; 108 out[1] = hex[val & 0xf]; 109 } 110 111 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 112 { 113 unsigned char *value = ptr; 114 unsigned int i; 115 116 for (i = 0; i < size; i++) { 117 fill_hex(&out[i*2], value[i]); 118 } 119 } 120 121 static inline void print_int(const char *desc, u64 addr) 122 { 123 char out[] = ": 0xffffffffffffffff\n"; 124 125 fill_hex_val(&out[4], &addr, sizeof(addr)); 126 127 sclp_print(desc); 128 sclp_print(out); 129 } 130 131 static inline void debug_print_int(const char *desc, u64 addr) 132 { 133 #ifdef DEBUG 134 print_int(desc, addr); 135 #endif 136 } 137 138 static inline void debug_print_addr(const char *desc, void *p) 139 { 140 #ifdef DEBUG 141 debug_print_int(desc, (unsigned int)(unsigned long)p); 142 #endif 143 } 144 145 /*********************************************** 146 * Hypercall functions * 147 ***********************************************/ 148 149 #define KVM_S390_VIRTIO_NOTIFY 0 150 #define KVM_S390_VIRTIO_RESET 1 151 #define KVM_S390_VIRTIO_SET_STATUS 2 152 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 153 154 static inline void yield(void) 155 { 156 asm volatile ("diag 0,0,0x44" 157 : : 158 : "memory", "cc"); 159 } 160 161 #define MAX_SECTOR_SIZE 4096 162 163 static inline void sleep(unsigned int seconds) 164 { 165 ulong target = get_second() + seconds; 166 167 while (get_second() < target) { 168 yield(); 169 } 170 } 171 172 static inline void *memcpy(void *s1, const void *s2, size_t n) 173 { 174 uint8_t *p1 = s1; 175 const uint8_t *p2 = s2; 176 177 while (n--) { 178 p1[n] = p2[n]; 179 } 180 return s1; 181 } 182 183 static inline void IPL_assert(bool term, const char *message) 184 { 185 if (!term) { 186 sclp_print("\n! "); 187 sclp_print(message); 188 panic(" !\n"); /* no return */ 189 } 190 } 191 192 static inline void IPL_check(bool term, const char *message) 193 { 194 if (!term) { 195 sclp_print("\n! WARNING: "); 196 sclp_print(message); 197 sclp_print(" !\n"); 198 } 199 } 200 201 extern const unsigned char ebc2asc[256]; 202 static inline void ebcdic_to_ascii(const char *src, 203 char *dst, 204 unsigned int size) 205 { 206 unsigned int i; 207 208 for (i = 0; i < size; i++) { 209 unsigned c = src[i]; 210 dst[i] = ebc2asc[c]; 211 } 212 } 213 214 #endif /* S390_CCW_H */ 215