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 #define EIO 1 31 #define EBUSY 2 32 #define ENODEV 3 33 34 #ifndef NULL 35 #define NULL 0 36 #endif 37 #ifndef MIN 38 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 39 #endif 40 #ifndef MIN_NON_ZERO 41 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ 42 ((b) == 0 ? (a) : (MIN(a, b)))) 43 #endif 44 45 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 46 47 #include "cio.h" 48 #include "iplb.h" 49 50 /* start.s */ 51 void disabled_wait(void) __attribute__ ((__noreturn__)); 52 void consume_sclp_int(void); 53 void consume_io_int(void); 54 55 /* main.c */ 56 void write_subsystem_identification(void); 57 void write_iplb_location(void); 58 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 59 unsigned int get_loadparm_index(void); 60 void main(void); 61 62 /* sclp.c */ 63 void sclp_print(const char *string); 64 void sclp_set_write_mask(uint32_t receive_mask, uint32_t send_mask); 65 void sclp_setup(void); 66 void sclp_get_loadparm_ascii(char *loadparm); 67 int sclp_read(char *str, size_t count); 68 69 /* virtio.c */ 70 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 71 ulong subchan_id, void *load_addr); 72 bool virtio_is_supported(SubChannelId schid); 73 int virtio_blk_setup_device(SubChannelId schid); 74 int virtio_read(ulong sector, void *load_addr); 75 76 /* bootmap.c */ 77 void zipl_load(void); 78 79 /* jump2ipl.c */ 80 void write_reset_psw(uint64_t psw); 81 void jump_to_IPL_code(uint64_t address); 82 void jump_to_low_kernel(void); 83 84 /* menu.c */ 85 void menu_set_parms(uint8_t boot_menu_flag, uint32_t boot_menu_timeout); 86 int menu_get_zipl_boot_index(const char *menu_data); 87 bool menu_is_enabled_zipl(void); 88 int menu_get_enum_boot_index(bool *valid_entries); 89 bool menu_is_enabled_enum(void); 90 91 #define MAX_BOOT_ENTRIES 31 92 93 __attribute__ ((__noreturn__)) 94 static inline void panic(const char *string) 95 { 96 sclp_print(string); 97 disabled_wait(); 98 } 99 100 static inline void fill_hex(char *out, unsigned char val) 101 { 102 const char hex[] = "0123456789abcdef"; 103 104 out[0] = hex[(val >> 4) & 0xf]; 105 out[1] = hex[val & 0xf]; 106 } 107 108 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 109 { 110 unsigned char *value = ptr; 111 unsigned int i; 112 113 for (i = 0; i < size; i++) { 114 fill_hex(&out[i*2], value[i]); 115 } 116 } 117 118 static inline void print_int(const char *desc, u64 addr) 119 { 120 char out[] = ": 0xffffffffffffffff\n"; 121 122 fill_hex_val(&out[4], &addr, sizeof(addr)); 123 124 sclp_print(desc); 125 sclp_print(out); 126 } 127 128 static inline void debug_print_int(const char *desc, u64 addr) 129 { 130 #ifdef DEBUG 131 print_int(desc, addr); 132 #endif 133 } 134 135 static inline void debug_print_addr(const char *desc, void *p) 136 { 137 #ifdef DEBUG 138 debug_print_int(desc, (unsigned int)(unsigned long)p); 139 #endif 140 } 141 142 /*********************************************** 143 * Hypercall functions * 144 ***********************************************/ 145 146 #define KVM_S390_VIRTIO_NOTIFY 0 147 #define KVM_S390_VIRTIO_RESET 1 148 #define KVM_S390_VIRTIO_SET_STATUS 2 149 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 150 151 #define MAX_SECTOR_SIZE 4096 152 153 static inline void IPL_assert(bool term, const char *message) 154 { 155 if (!term) { 156 sclp_print("\n! "); 157 sclp_print(message); 158 panic(" !\n"); /* no return */ 159 } 160 } 161 162 static inline void IPL_check(bool term, const char *message) 163 { 164 if (!term) { 165 sclp_print("\n! WARNING: "); 166 sclp_print(message); 167 sclp_print(" !\n"); 168 } 169 } 170 171 extern const unsigned char ebc2asc[256]; 172 static inline void ebcdic_to_ascii(const char *src, 173 char *dst, 174 unsigned int size) 175 { 176 unsigned int i; 177 178 for (i = 0; i < size; i++) { 179 unsigned c = src[i]; 180 dst[i] = ebc2asc[c]; 181 } 182 } 183 184 #endif /* S390_CCW_H */ 185