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 long size_t; 22 typedef int bool; 23 typedef unsigned char uint8_t; 24 typedef unsigned short uint16_t; 25 typedef unsigned int uint32_t; 26 typedef unsigned long long uint64_t; 27 typedef unsigned char __u8; 28 typedef unsigned short __u16; 29 typedef unsigned int __u32; 30 typedef unsigned long long __u64; 31 32 #define true 1 33 #define false 0 34 #define PAGE_SIZE 4096 35 36 #ifndef EIO 37 #define EIO 1 38 #endif 39 #ifndef EBUSY 40 #define EBUSY 2 41 #endif 42 #ifndef NULL 43 #define NULL 0 44 #endif 45 46 #include "cio.h" 47 48 /* start.s */ 49 void disabled_wait(void); 50 void consume_sclp_int(void); 51 52 /* main.c */ 53 void panic(const char *string); 54 void write_subsystem_identification(void); 55 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 56 extern char ring_area[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 57 extern uint64_t boot_value; 58 59 /* sclp-ascii.c */ 60 void sclp_print(const char *string); 61 void sclp_setup(void); 62 63 /* virtio.c */ 64 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 65 ulong subchan_id, void *load_addr); 66 bool virtio_is_blk(struct subchannel_id schid); 67 void virtio_setup_block(struct subchannel_id schid); 68 int virtio_read(ulong sector, void *load_addr); 69 int enable_mss_facility(void); 70 ulong get_second(void); 71 72 /* bootmap.c */ 73 void zipl_load(void); 74 75 static inline void *memset(void *s, int c, size_t n) 76 { 77 int i; 78 unsigned char *p = s; 79 80 for (i = 0; i < n; i++) { 81 p[i] = c; 82 } 83 84 return s; 85 } 86 87 static inline void fill_hex(char *out, unsigned char val) 88 { 89 const char hex[] = "0123456789abcdef"; 90 91 out[0] = hex[(val >> 4) & 0xf]; 92 out[1] = hex[val & 0xf]; 93 } 94 95 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 96 { 97 unsigned char *value = ptr; 98 unsigned int i; 99 100 for (i = 0; i < size; i++) { 101 fill_hex(&out[i*2], value[i]); 102 } 103 } 104 105 static inline void print_int(const char *desc, u64 addr) 106 { 107 char out[] = ": 0xffffffffffffffff\n"; 108 109 fill_hex_val(&out[4], &addr, sizeof(addr)); 110 111 sclp_print(desc); 112 sclp_print(out); 113 } 114 115 static inline void debug_print_int(const char *desc, u64 addr) 116 { 117 #ifdef DEBUG 118 print_int(desc, addr); 119 #endif 120 } 121 122 static inline void debug_print_addr(const char *desc, void *p) 123 { 124 #ifdef DEBUG 125 debug_print_int(desc, (unsigned int)(unsigned long)p); 126 #endif 127 } 128 129 /*********************************************** 130 * Hypercall functions * 131 ***********************************************/ 132 133 #define KVM_S390_VIRTIO_NOTIFY 0 134 #define KVM_S390_VIRTIO_RESET 1 135 #define KVM_S390_VIRTIO_SET_STATUS 2 136 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 137 138 static inline void yield(void) 139 { 140 asm volatile ("diag 0,0,0x44" 141 : : 142 : "memory", "cc"); 143 } 144 145 #define MAX_SECTOR_SIZE 4096 146 147 static inline void sleep(unsigned int seconds) 148 { 149 ulong target = get_second() + seconds; 150 151 while (get_second() < target) { 152 yield(); 153 } 154 } 155 156 static inline void *memcpy(void *s1, const void *s2, size_t n) 157 { 158 uint8_t *p1 = s1; 159 const uint8_t *p2 = s2; 160 161 while (n--) { 162 p1[n] = p2[n]; 163 } 164 return s1; 165 } 166 167 static inline void IPL_assert(bool term, const char *message) 168 { 169 if (!term) { 170 sclp_print("\n! "); 171 sclp_print(message); 172 panic(" !\n"); /* no return */ 173 } 174 } 175 176 static inline void IPL_check(bool term, const char *message) 177 { 178 if (!term) { 179 sclp_print("\n! WARNING: "); 180 sclp_print(message); 181 sclp_print(" !\n"); 182 } 183 } 184 185 #endif /* S390_CCW_H */ 186