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 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 61 unsigned int get_loadparm_index(void); 62 63 /* sclp.c */ 64 void sclp_print(const char *string); 65 void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask); 66 void sclp_setup(void); 67 void sclp_get_loadparm_ascii(char *loadparm); 68 int sclp_read(char *str, size_t count); 69 70 /* virtio.c */ 71 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 72 ulong subchan_id, void *load_addr); 73 bool virtio_is_supported(SubChannelId schid); 74 void virtio_blk_setup_device(SubChannelId schid); 75 int virtio_read(ulong sector, void *load_addr); 76 u64 get_clock(void); 77 ulong get_second(void); 78 79 /* bootmap.c */ 80 void zipl_load(void); 81 82 /* jump2ipl.c */ 83 void jump_to_IPL_code(uint64_t address); 84 void jump_to_low_kernel(void); 85 86 /* menu.c */ 87 void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout); 88 int menu_get_zipl_boot_index(const char *menu_data); 89 bool menu_is_enabled_zipl(void); 90 int menu_get_enum_boot_index(bool *valid_entries); 91 bool menu_is_enabled_enum(void); 92 93 #define MAX_BOOT_ENTRIES 31 94 95 static inline void fill_hex(char *out, unsigned char val) 96 { 97 const char hex[] = "0123456789abcdef"; 98 99 out[0] = hex[(val >> 4) & 0xf]; 100 out[1] = hex[val & 0xf]; 101 } 102 103 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 104 { 105 unsigned char *value = ptr; 106 unsigned int i; 107 108 for (i = 0; i < size; i++) { 109 fill_hex(&out[i*2], value[i]); 110 } 111 } 112 113 static inline void print_int(const char *desc, u64 addr) 114 { 115 char out[] = ": 0xffffffffffffffff\n"; 116 117 fill_hex_val(&out[4], &addr, sizeof(addr)); 118 119 sclp_print(desc); 120 sclp_print(out); 121 } 122 123 static inline void debug_print_int(const char *desc, u64 addr) 124 { 125 #ifdef DEBUG 126 print_int(desc, addr); 127 #endif 128 } 129 130 static inline void debug_print_addr(const char *desc, void *p) 131 { 132 #ifdef DEBUG 133 debug_print_int(desc, (unsigned int)(unsigned long)p); 134 #endif 135 } 136 137 /*********************************************** 138 * Hypercall functions * 139 ***********************************************/ 140 141 #define KVM_S390_VIRTIO_NOTIFY 0 142 #define KVM_S390_VIRTIO_RESET 1 143 #define KVM_S390_VIRTIO_SET_STATUS 2 144 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 145 146 static inline void yield(void) 147 { 148 asm volatile ("diag 0,0,0x44" 149 : : 150 : "memory", "cc"); 151 } 152 153 #define MAX_SECTOR_SIZE 4096 154 155 static inline void sleep(unsigned int seconds) 156 { 157 ulong target = get_second() + seconds; 158 159 while (get_second() < target) { 160 yield(); 161 } 162 } 163 164 static inline void IPL_assert(bool term, const char *message) 165 { 166 if (!term) { 167 sclp_print("\n! "); 168 sclp_print(message); 169 panic(" !\n"); /* no return */ 170 } 171 } 172 173 static inline void IPL_check(bool term, const char *message) 174 { 175 if (!term) { 176 sclp_print("\n! WARNING: "); 177 sclp_print(message); 178 sclp_print(" !\n"); 179 } 180 } 181 182 extern const unsigned char ebc2asc[256]; 183 static inline void ebcdic_to_ascii(const char *src, 184 char *dst, 185 unsigned int size) 186 { 187 unsigned int i; 188 189 for (i = 0; i < size; i++) { 190 unsigned c = src[i]; 191 dst[i] = ebc2asc[c]; 192 } 193 } 194 195 #endif /* S390_CCW_H */ 196