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_set_write_mask(uint32_t receive_mask, uint32_t send_mask); 73 void sclp_setup(void); 74 void sclp_get_loadparm_ascii(char *loadparm); 75 int sclp_read(char *str, size_t count); 76 77 /* virtio.c */ 78 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 79 ulong subchan_id, void *load_addr); 80 bool virtio_is_supported(SubChannelId schid); 81 void virtio_blk_setup_device(SubChannelId schid); 82 int virtio_read(ulong sector, void *load_addr); 83 int enable_mss_facility(void); 84 u64 get_clock(void); 85 ulong get_second(void); 86 87 /* bootmap.c */ 88 void zipl_load(void); 89 90 /* jump2ipl.c */ 91 void jump_to_IPL_code(uint64_t address); 92 void jump_to_low_kernel(void); 93 94 /* menu.c */ 95 void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout); 96 int menu_get_zipl_boot_index(const char *menu_data); 97 bool menu_is_enabled_zipl(void); 98 int menu_get_enum_boot_index(bool *valid_entries); 99 bool menu_is_enabled_enum(void); 100 101 #define MAX_BOOT_ENTRIES 31 102 103 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 IPL_assert(bool term, const char *message) 173 { 174 if (!term) { 175 sclp_print("\n! "); 176 sclp_print(message); 177 panic(" !\n"); /* no return */ 178 } 179 } 180 181 static inline void IPL_check(bool term, const char *message) 182 { 183 if (!term) { 184 sclp_print("\n! WARNING: "); 185 sclp_print(message); 186 sclp_print(" !\n"); 187 } 188 } 189 190 extern const unsigned char ebc2asc[256]; 191 static inline void ebcdic_to_ascii(const char *src, 192 char *dst, 193 unsigned int size) 194 { 195 unsigned int i; 196 197 for (i = 0; i < size; i++) { 198 unsigned c = src[i]; 199 dst[i] = ebc2asc[c]; 200 } 201 } 202 203 #endif /* S390_CCW_H */ 204