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) __attribute__ ((__noreturn__)); 54 void consume_sclp_int(void); 55 void consume_io_int(void); 56 57 /* main.c */ 58 void write_subsystem_identification(void); 59 void write_iplb_location(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 77 /* bootmap.c */ 78 void zipl_load(void); 79 80 /* jump2ipl.c */ 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 static inline void panic(const char *string) 94 { 95 sclp_print(string); 96 disabled_wait(); 97 } 98 99 static inline void fill_hex(char *out, unsigned char val) 100 { 101 const char hex[] = "0123456789abcdef"; 102 103 out[0] = hex[(val >> 4) & 0xf]; 104 out[1] = hex[val & 0xf]; 105 } 106 107 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 108 { 109 unsigned char *value = ptr; 110 unsigned int i; 111 112 for (i = 0; i < size; i++) { 113 fill_hex(&out[i*2], value[i]); 114 } 115 } 116 117 static inline void print_int(const char *desc, u64 addr) 118 { 119 char out[] = ": 0xffffffffffffffff\n"; 120 121 fill_hex_val(&out[4], &addr, sizeof(addr)); 122 123 sclp_print(desc); 124 sclp_print(out); 125 } 126 127 static inline void debug_print_int(const char *desc, u64 addr) 128 { 129 #ifdef DEBUG 130 print_int(desc, addr); 131 #endif 132 } 133 134 static inline void debug_print_addr(const char *desc, void *p) 135 { 136 #ifdef DEBUG 137 debug_print_int(desc, (unsigned int)(unsigned long)p); 138 #endif 139 } 140 141 /*********************************************** 142 * Hypercall functions * 143 ***********************************************/ 144 145 #define KVM_S390_VIRTIO_NOTIFY 0 146 #define KVM_S390_VIRTIO_RESET 1 147 #define KVM_S390_VIRTIO_SET_STATUS 2 148 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 149 150 #define MAX_SECTOR_SIZE 4096 151 152 static inline void IPL_assert(bool term, const char *message) 153 { 154 if (!term) { 155 sclp_print("\n! "); 156 sclp_print(message); 157 panic(" !\n"); /* no return */ 158 } 159 } 160 161 static inline void IPL_check(bool term, const char *message) 162 { 163 if (!term) { 164 sclp_print("\n! WARNING: "); 165 sclp_print(message); 166 sclp_print(" !\n"); 167 } 168 } 169 170 extern const unsigned char ebc2asc[256]; 171 static inline void ebcdic_to_ascii(const char *src, 172 char *dst, 173 unsigned int size) 174 { 175 unsigned int i; 176 177 for (i = 0; i < size; i++) { 178 unsigned c = src[i]; 179 dst[i] = ebc2asc[c]; 180 } 181 } 182 183 #endif /* S390_CCW_H */ 184