1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * s390 (re)ipl support 4 * 5 * Copyright IBM Corp. 2007 6 */ 7 8 #ifndef _ASM_S390_IPL_H 9 #define _ASM_S390_IPL_H 10 11 #include <asm/lowcore.h> 12 #include <asm/types.h> 13 #include <asm/cio.h> 14 #include <asm/setup.h> 15 16 #define NSS_NAME_SIZE 8 17 18 #define IPL_PARMBLOCK_ORIGIN 0x2000 19 20 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \ 21 sizeof(struct ipl_block_fcp)) 22 23 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16) 24 25 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \ 26 sizeof(struct ipl_block_ccw)) 27 28 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16) 29 30 #define IPL_MAX_SUPPORTED_VERSION (0) 31 32 #define IPL_PARMBLOCK_START ((struct ipl_parameter_block *) \ 33 IPL_PARMBLOCK_ORIGIN) 34 #define IPL_PARMBLOCK_SIZE (IPL_PARMBLOCK_START->hdr.len) 35 36 struct ipl_list_hdr { 37 u32 len; 38 u8 reserved1[3]; 39 u8 version; 40 u32 blk0_len; 41 u8 pbt; 42 u8 flags; 43 u16 reserved2; 44 u8 loadparm[8]; 45 } __attribute__((packed)); 46 47 struct ipl_block_fcp { 48 u8 reserved1[305-1]; 49 u8 opt; 50 u8 reserved2[3]; 51 u16 reserved3; 52 u16 devno; 53 u8 reserved4[4]; 54 u64 wwpn; 55 u64 lun; 56 u32 bootprog; 57 u8 reserved5[12]; 58 u64 br_lba; 59 u32 scp_data_len; 60 u8 reserved6[260]; 61 u8 scp_data[]; 62 } __attribute__((packed)); 63 64 #define DIAG308_VMPARM_SIZE 64 65 #define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \ 66 offsetof(struct ipl_block_fcp, scp_data))) 67 68 struct ipl_block_ccw { 69 u8 reserved1[84]; 70 u16 reserved2 : 13; 71 u8 ssid : 3; 72 u16 devno; 73 u8 vm_flags; 74 u8 reserved3[3]; 75 u32 vm_parm_len; 76 u8 nss_name[8]; 77 u8 vm_parm[DIAG308_VMPARM_SIZE]; 78 u8 reserved4[8]; 79 } __attribute__((packed)); 80 81 struct ipl_parameter_block { 82 struct ipl_list_hdr hdr; 83 union { 84 struct ipl_block_fcp fcp; 85 struct ipl_block_ccw ccw; 86 } ipl_info; 87 } __packed __aligned(PAGE_SIZE); 88 89 /* 90 * IPL validity flags 91 */ 92 extern u32 ipl_flags; 93 94 struct save_area; 95 struct save_area * __init save_area_alloc(bool is_boot_cpu); 96 struct save_area * __init save_area_boot_cpu(void); 97 void __init save_area_add_regs(struct save_area *, void *regs); 98 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs); 99 100 extern void do_reipl(void); 101 extern void do_halt(void); 102 extern void do_poff(void); 103 extern void ipl_verify_parameters(void); 104 extern void ipl_update_parameters(void); 105 extern size_t append_ipl_vmparm(char *, size_t); 106 extern size_t append_ipl_scpdata(char *, size_t); 107 108 enum { 109 IPL_DEVNO_VALID = 1, 110 IPL_PARMBLOCK_VALID = 2, 111 }; 112 113 enum ipl_type { 114 IPL_TYPE_UNKNOWN = 1, 115 IPL_TYPE_CCW = 2, 116 IPL_TYPE_FCP = 4, 117 IPL_TYPE_FCP_DUMP = 8, 118 IPL_TYPE_NSS = 16, 119 }; 120 121 struct ipl_info 122 { 123 enum ipl_type type; 124 union { 125 struct { 126 struct ccw_dev_id dev_id; 127 } ccw; 128 struct { 129 struct ccw_dev_id dev_id; 130 u64 wwpn; 131 u64 lun; 132 } fcp; 133 struct { 134 char name[NSS_NAME_SIZE + 1]; 135 } nss; 136 } data; 137 }; 138 139 extern struct ipl_info ipl_info; 140 extern void setup_ipl(void); 141 142 /* 143 * DIAG 308 support 144 */ 145 enum diag308_subcode { 146 DIAG308_REL_HSA = 2, 147 DIAG308_LOAD_CLEAR = 3, 148 DIAG308_LOAD_NORMAL_DUMP = 4, 149 DIAG308_SET = 5, 150 DIAG308_STORE = 6, 151 }; 152 153 enum diag308_ipl_type { 154 DIAG308_IPL_TYPE_FCP = 0, 155 DIAG308_IPL_TYPE_CCW = 2, 156 }; 157 158 enum diag308_opt { 159 DIAG308_IPL_OPT_IPL = 0x10, 160 DIAG308_IPL_OPT_DUMP = 0x20, 161 }; 162 163 enum diag308_flags { 164 DIAG308_FLAGS_LP_VALID = 0x80, 165 }; 166 167 enum diag308_vm_flags { 168 DIAG308_VM_FLAGS_NSS_VALID = 0x80, 169 DIAG308_VM_FLAGS_VP_VALID = 0x40, 170 }; 171 172 enum diag308_rc { 173 DIAG308_RC_OK = 0x0001, 174 DIAG308_RC_NOCONFIG = 0x0102, 175 }; 176 177 extern int diag308(unsigned long subcode, void *addr); 178 extern void diag308_reset(void); 179 extern void store_status(void (*fn)(void *), void *data); 180 extern void lgr_info_log(void); 181 182 #endif /* _ASM_S390_IPL_H */ 183