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 virtio_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 71 /* bootmap.c */ 72 void zipl_load(void); 73 74 static inline void *memset(void *s, int c, size_t n) 75 { 76 int i; 77 unsigned char *p = s; 78 79 for (i = 0; i < n; i++) { 80 p[i] = c; 81 } 82 83 return s; 84 } 85 86 static inline void fill_hex(char *out, unsigned char val) 87 { 88 const char hex[] = "0123456789abcdef"; 89 90 out[0] = hex[(val >> 4) & 0xf]; 91 out[1] = hex[val & 0xf]; 92 } 93 94 static inline void fill_hex_val(char *out, void *ptr, unsigned size) 95 { 96 unsigned char *value = ptr; 97 unsigned int i; 98 99 for (i = 0; i < size; i++) { 100 fill_hex(&out[i*2], value[i]); 101 } 102 } 103 104 static inline void print_int(const char *desc, u64 addr) 105 { 106 char out[] = ": 0xffffffffffffffff\n"; 107 108 fill_hex_val(&out[4], &addr, sizeof(addr)); 109 110 sclp_print(desc); 111 sclp_print(out); 112 } 113 114 static inline void debug_print_int(const char *desc, u64 addr) 115 { 116 #ifdef DEBUG 117 print_int(desc, addr); 118 #endif 119 } 120 121 static inline void debug_print_addr(const char *desc, void *p) 122 { 123 #ifdef DEBUG 124 debug_print_int(desc, (unsigned int)(unsigned long)p); 125 #endif 126 } 127 128 /*********************************************** 129 * Hypercall functions * 130 ***********************************************/ 131 132 #define KVM_S390_VIRTIO_NOTIFY 0 133 #define KVM_S390_VIRTIO_RESET 1 134 #define KVM_S390_VIRTIO_SET_STATUS 2 135 #define KVM_S390_VIRTIO_CCW_NOTIFY 3 136 137 static inline void yield(void) 138 { 139 asm volatile ("diag 0,0,0x44" 140 : : 141 : "memory", "cc"); 142 } 143 144 #define MAX_SECTOR_SIZE 4096 145 146 #endif /* S390_CCW_H */ 147