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 #include <stdbool.h> 17 #include <stddef.h> 18 #include <stdint.h> 19 #include <stdio.h> 20 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 #define EINVAL 4 34 35 #ifndef MIN 36 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 37 #endif 38 #ifndef MIN_NON_ZERO 39 #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ 40 ((b) == 0 ? (a) : (MIN(a, b)))) 41 #endif 42 43 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) 44 45 #include "cio.h" 46 #include "iplb.h" 47 48 /* start.s */ 49 void disabled_wait(void) __attribute__ ((__noreturn__)); 50 void consume_sclp_int(void); 51 void consume_io_int(void); 52 53 /* main.c */ 54 void write_subsystem_identification(void); 55 void write_iplb_location(void); 56 unsigned int get_loadparm_index(void); 57 void main(void); 58 59 /* netmain.c */ 60 int netmain(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(unsigned long rec_list1, unsigned long rec_list2, 71 unsigned long subchan_id, void *load_addr); 72 bool virtio_is_supported(SubChannelId schid); 73 int virtio_blk_setup_device(SubChannelId schid); 74 int virtio_read(unsigned long 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 int 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 printf("ERROR: %s\n ", 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 debug_print_int(const char *desc, u64 addr) 119 { 120 #ifdef DEBUG 121 printf("%s 0x%X\n", desc, addr); 122 #endif 123 } 124 125 static inline void debug_print_addr(const char *desc, void *p) 126 { 127 #ifdef DEBUG 128 debug_print_int(desc, (unsigned int)(unsigned long)p); 129 #endif 130 } 131 132 /*********************************************** 133 * Hypercall functions * 134 ***********************************************/ 135 136 #define KVM_S390_VIRTIO_NOTIFY 0 137 #define KVM_S390_VIRTIO_RESET 1 138 #define KVM_S390_VIRTIO_SET_STATUS 2 139 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 140 141 #define MAX_SECTOR_SIZE 4096 142 143 static inline void IPL_assert(bool term, const char *message) 144 { 145 if (!term) { 146 panic(message); /* no return */ 147 } 148 } 149 150 static inline void IPL_check(bool term, const char *message) 151 { 152 if (!term) { 153 printf("WARNING: %s\n", message); 154 } 155 } 156 157 extern const unsigned char ebc2asc[256]; 158 static inline void ebcdic_to_ascii(const char *src, 159 char *dst, 160 unsigned int size) 161 { 162 unsigned int i; 163 164 for (i = 0; i < size; i++) { 165 unsigned c = src[i]; 166 dst[i] = ebc2asc[c]; 167 } 168 } 169 170 #endif /* S390_CCW_H */ 171