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 unsigned char __u8; 22 typedef unsigned short __u16; 23 typedef unsigned int __u32; 24 typedef unsigned long long __u64; 25 26 #define true 1 27 #define false 0 28 #define PAGE_SIZE 4096 29 30 #ifndef EIO 31 #define EIO 1 32 #endif 33 #ifndef EBUSY 34 #define EBUSY 2 35 #endif 36 #ifndef NULL 37 #define NULL 0 38 #endif 39 #ifndef MIN 40 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 41 #endif 42 #ifndef MIN_NON_ZERO 43 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ 44 ((b) == 0 ? (a) : (MIN(a, b)))) 45 #endif 46 47 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 48 49 #include "cio.h" 50 #include "iplb.h" 51 52 typedef struct irb Irb; 53 typedef struct ccw1 Ccw1; 54 typedef struct cmd_orb CmdOrb; 55 typedef struct schib Schib; 56 typedef struct chsc_area_sda ChscAreaSda; 57 typedef struct senseid SenseId; 58 typedef struct subchannel_id SubChannelId; 59 60 /* start.s */ 61 void disabled_wait(void); 62 void consume_sclp_int(void); 63 64 /* main.c */ 65 void panic(const char *string); 66 void write_subsystem_identification(void); 67 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 68 unsigned int get_loadparm_index(void); 69 70 /* sclp.c */ 71 void sclp_print(const char *string); 72 void sclp_setup(void); 73 void sclp_get_loadparm_ascii(char *loadparm); 74 75 /* virtio.c */ 76 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 77 ulong subchan_id, void *load_addr); 78 bool virtio_is_supported(SubChannelId schid); 79 void virtio_blk_setup_device(SubChannelId schid); 80 int virtio_read(ulong sector, void *load_addr); 81 int enable_mss_facility(void); 82 ulong get_second(void); 83 84 /* bootmap.c */ 85 void zipl_load(void); 86 87 static inline void fill_hex(char *out, unsigned char val) 88 { 89 const char hex[] = "0123456789abcdef"; 90 91 out[0] = hex[(val >> 4) & 0xf]; 92 out[1] = hex[val & 0xf]; 93 } 94 95 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 96 { 97 unsigned char *value = ptr; 98 unsigned int i; 99 100 for (i = 0; i < size; i++) { 101 fill_hex(&out[i*2], value[i]); 102 } 103 } 104 105 static inline void print_int(const char *desc, u64 addr) 106 { 107 char out[] = ": 0xffffffffffffffff\n"; 108 109 fill_hex_val(&out[4], &addr, sizeof(addr)); 110 111 sclp_print(desc); 112 sclp_print(out); 113 } 114 115 static inline void debug_print_int(const char *desc, u64 addr) 116 { 117 #ifdef DEBUG 118 print_int(desc, addr); 119 #endif 120 } 121 122 static inline void debug_print_addr(const char *desc, void *p) 123 { 124 #ifdef DEBUG 125 debug_print_int(desc, (unsigned int)(unsigned long)p); 126 #endif 127 } 128 129 /*********************************************** 130 * Hypercall functions * 131 ***********************************************/ 132 133 #define KVM_S390_VIRTIO_NOTIFY 0 134 #define KVM_S390_VIRTIO_RESET 1 135 #define KVM_S390_VIRTIO_SET_STATUS 2 136 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 137 138 static inline void yield(void) 139 { 140 asm volatile ("diag 0,0,0x44" 141 : : 142 : "memory", "cc"); 143 } 144 145 #define MAX_SECTOR_SIZE 4096 146 147 static inline void sleep(unsigned int seconds) 148 { 149 ulong target = get_second() + seconds; 150 151 while (get_second() < target) { 152 yield(); 153 } 154 } 155 156 static inline void IPL_assert(bool term, const char *message) 157 { 158 if (!term) { 159 sclp_print("\n! "); 160 sclp_print(message); 161 panic(" !\n"); /* no return */ 162 } 163 } 164 165 static inline void IPL_check(bool term, const char *message) 166 { 167 if (!term) { 168 sclp_print("\n! WARNING: "); 169 sclp_print(message); 170 sclp_print(" !\n"); 171 } 172 } 173 174 extern const unsigned char ebc2asc[256]; 175 static inline void ebcdic_to_ascii(const char *src, 176 char *dst, 177 unsigned int size) 178 { 179 unsigned int i; 180 181 for (i = 0; i < size; i++) { 182 unsigned c = src[i]; 183 dst[i] = ebc2asc[c]; 184 } 185 } 186 187 #endif /* S390_CCW_H */ 188