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