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 51 /* main.c */ 52 void virtio_panic(const char *string); 53 54 /* sclp-ascii.c */ 55 void sclp_print(const char *string); 56 void sclp_setup(void); 57 58 /* virtio.c */ 59 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 60 ulong subchan_id, void *load_addr); 61 bool virtio_is_blk(struct subchannel_id schid); 62 void virtio_setup_block(struct subchannel_id schid); 63 int virtio_read(ulong sector, void *load_addr); 64 int enable_mss_facility(void); 65 66 /* bootmap.c */ 67 int zipl_load(void); 68 69 static inline void *memset(void *s, int c, size_t n) 70 { 71 int i; 72 unsigned char *p = s; 73 74 for (i = 0; i < n; i++) { 75 p[i] = c; 76 } 77 78 return s; 79 } 80 81 static inline void fill_hex(char *out, unsigned char val) 82 { 83 const char hex[] = "0123456789abcdef"; 84 85 out[0] = hex[(val >> 4) & 0xf]; 86 out[1] = hex[val & 0xf]; 87 } 88 89 static inline void print_int(const char *desc, u64 addr) 90 { 91 unsigned char *addr_c = (unsigned char*)&addr; 92 char out[] = ": 0xffffffffffffffff\n"; 93 unsigned int i; 94 95 for (i = 0; i < sizeof(addr); i++) { 96 fill_hex(&out[4 + (i*2)], addr_c[i]); 97 } 98 99 sclp_print(desc); 100 sclp_print(out); 101 } 102 103 static inline void debug_print_int(const char *desc, u64 addr) 104 { 105 #ifdef DEBUG 106 print_int(desc, addr); 107 #endif 108 } 109 110 static inline void debug_print_addr(const char *desc, void *p) 111 { 112 #ifdef DEBUG 113 debug_print_int(desc, (unsigned int)(unsigned long)p); 114 #endif 115 } 116 117 /*********************************************** 118 * Hypercall functions * 119 ***********************************************/ 120 121 #define KVM_S390_VIRTIO_NOTIFY 0 122 #define KVM_S390_VIRTIO_RESET 1 123 #define KVM_S390_VIRTIO_SET_STATUS 2 124 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 125 126 static inline void yield(void) 127 { 128 asm volatile ("diag 0,0,0x44" 129 : : 130 : "memory", "cc"); 131 } 132 133 #define SECTOR_SIZE 512 134 135 #endif /* S390_CCW_H */ 136