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