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 void write_subsystem_identification(void); 54 extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 55 extern char ring_area[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); 56 extern uint64_t boot_value; 57 58 /* sclp-ascii.c */ 59 void sclp_print(const char *string); 60 void sclp_setup(void); 61 62 /* virtio.c */ 63 unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2, 64 ulong subchan_id, void *load_addr); 65 bool virtio_is_blk(struct subchannel_id schid); 66 void virtio_setup_block(struct subchannel_id schid); 67 int virtio_read(ulong sector, void *load_addr); 68 int enable_mss_facility(void); 69 70 /* bootmap.c */ 71 void zipl_load(void); 72 73 static inline void *memset(void *s, int c, size_t n) 74 { 75 int i; 76 unsigned char *p = s; 77 78 for (i = 0; i < n; i++) { 79 p[i] = c; 80 } 81 82 return s; 83 } 84 85 static inline void fill_hex(char *out, unsigned char val) 86 { 87 const char hex[] = "0123456789abcdef"; 88 89 out[0] = hex[(val >> 4) & 0xf]; 90 out[1] = hex[val & 0xf]; 91 } 92 93 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 94 { 95 unsigned char *value = ptr; 96 unsigned int i; 97 98 for (i = 0; i < size; i++) { 99 fill_hex(&out[i*2], value[i]); 100 } 101 } 102 103 static inline void print_int(const char *desc, u64 addr) 104 { 105 char out[] = ": 0xffffffffffffffff\n"; 106 107 fill_hex_val(&out[4], &addr, sizeof(addr)); 108 109 sclp_print(desc); 110 sclp_print(out); 111 } 112 113 static inline void debug_print_int(const char *desc, u64 addr) 114 { 115 #ifdef DEBUG 116 print_int(desc, addr); 117 #endif 118 } 119 120 static inline void debug_print_addr(const char *desc, void *p) 121 { 122 #ifdef DEBUG 123 debug_print_int(desc, (unsigned int)(unsigned long)p); 124 #endif 125 } 126 127 /*********************************************** 128 * Hypercall functions * 129 ***********************************************/ 130 131 #define KVM_S390_VIRTIO_NOTIFY 0 132 #define KVM_S390_VIRTIO_RESET 1 133 #define KVM_S390_VIRTIO_SET_STATUS 2 134 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 135 136 static inline void yield(void) 137 { 138 asm volatile ("diag 0,0,0x44" 139 : : 140 : "memory", "cc"); 141 } 142 143 #define MAX_SECTOR_SIZE 4096 144 145 #endif /* S390_CCW_H */ 146