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 /* start.s */ 53 void disabled_wait(void); 54 void consume_sclp_int(void); 55 void consume_io_int(void); 56 57 /* main.c */ 58 void panic(const char *string); 59 void write_subsystem_identification(void); 60 void write_iplb_location(void); 61 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 62 unsigned int get_loadparm_index(void); 63 64 /* sclp.c */ 65 void sclp_print(const char *string); 66 void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask); 67 void sclp_setup(void); 68 void sclp_get_loadparm_ascii(char *loadparm); 69 int sclp_read(char *str, size_t count); 70 71 /* virtio.c */ 72 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 73 ulong subchan_id, void *load_addr); 74 bool virtio_is_supported(SubChannelId schid); 75 void virtio_blk_setup_device(SubChannelId schid); 76 int virtio_read(ulong sector, void *load_addr); 77 u64 get_clock(void); 78 ulong get_second(void); 79 80 /* bootmap.c */ 81 void zipl_load(void); 82 83 /* jump2ipl.c */ 84 void jump_to_IPL_code(uint64_t address); 85 void jump_to_low_kernel(void); 86 87 /* menu.c */ 88 void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout); 89 int menu_get_zipl_boot_index(const char *menu_data); 90 bool menu_is_enabled_zipl(void); 91 int menu_get_enum_boot_index(bool *valid_entries); 92 bool menu_is_enabled_enum(void); 93 94 #define MAX_BOOT_ENTRIES 31 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 IPL_assert(bool term, const char *message) 166 { 167 if (!term) { 168 sclp_print("\n! "); 169 sclp_print(message); 170 panic(" !\n"); /* no return */ 171 } 172 } 173 174 static inline void IPL_check(bool term, const char *message) 175 { 176 if (!term) { 177 sclp_print("\n! WARNING: "); 178 sclp_print(message); 179 sclp_print(" !\n"); 180 } 181 } 182 183 extern const unsigned char ebc2asc[256]; 184 static inline void ebcdic_to_ascii(const char *src, 185 char *dst, 186 unsigned int size) 187 { 188 unsigned int i; 189 190 for (i = 0; i < size; i++) { 191 unsigned c = src[i]; 192 dst[i] = ebc2asc[c]; 193 } 194 } 195 196 #endif /* S390_CCW_H */ 197