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_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \ 19 sizeof(struct ipl_block_fcp)) 20 21 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16) 22 23 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \ 24 sizeof(struct ipl_block_ccw)) 25 26 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16) 27 28 #define IPL_MAX_SUPPORTED_VERSION (0) 29 30 struct ipl_list_hdr { 31 u32 len; 32 u8 reserved1[3]; 33 u8 version; 34 u32 blk0_len; 35 u8 pbt; 36 u8 flags; 37 u16 reserved2; 38 u8 loadparm[8]; 39 } __attribute__((packed)); 40 41 struct ipl_block_fcp { 42 u8 reserved1[305-1]; 43 u8 opt; 44 u8 reserved2[3]; 45 u16 reserved3; 46 u16 devno; 47 u8 reserved4[4]; 48 u64 wwpn; 49 u64 lun; 50 u32 bootprog; 51 u8 reserved5[12]; 52 u64 br_lba; 53 u32 scp_data_len; 54 u8 reserved6[260]; 55 u8 scp_data[]; 56 } __attribute__((packed)); 57 58 #define DIAG308_VMPARM_SIZE 64 59 #define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \ 60 offsetof(struct ipl_block_fcp, scp_data))) 61 62 struct ipl_block_ccw { 63 u8 reserved1[84]; 64 u16 reserved2 : 13; 65 u8 ssid : 3; 66 u16 devno; 67 u8 vm_flags; 68 u8 reserved3[3]; 69 u32 vm_parm_len; 70 u8 nss_name[8]; 71 u8 vm_parm[DIAG308_VMPARM_SIZE]; 72 u8 reserved4[8]; 73 } __attribute__((packed)); 74 75 struct ipl_parameter_block { 76 struct ipl_list_hdr hdr; 77 union { 78 struct ipl_block_fcp fcp; 79 struct ipl_block_ccw ccw; 80 char raw[PAGE_SIZE - sizeof(struct ipl_list_hdr)]; 81 } ipl_info; 82 } __packed __aligned(PAGE_SIZE); 83 84 struct save_area; 85 struct save_area * __init save_area_alloc(bool is_boot_cpu); 86 struct save_area * __init save_area_boot_cpu(void); 87 void __init save_area_add_regs(struct save_area *, void *regs); 88 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs); 89 90 extern void s390_reset_system(void); 91 extern void ipl_store_parameters(void); 92 extern size_t append_ipl_vmparm(char *, size_t); 93 extern size_t append_ipl_scpdata(char *, size_t); 94 95 enum ipl_type { 96 IPL_TYPE_UNKNOWN = 1, 97 IPL_TYPE_CCW = 2, 98 IPL_TYPE_FCP = 4, 99 IPL_TYPE_FCP_DUMP = 8, 100 IPL_TYPE_NSS = 16, 101 }; 102 103 struct ipl_info 104 { 105 enum ipl_type type; 106 union { 107 struct { 108 struct ccw_dev_id dev_id; 109 } ccw; 110 struct { 111 struct ccw_dev_id dev_id; 112 u64 wwpn; 113 u64 lun; 114 } fcp; 115 struct { 116 char name[NSS_NAME_SIZE + 1]; 117 } nss; 118 } data; 119 }; 120 121 extern struct ipl_info ipl_info; 122 extern void setup_ipl(void); 123 extern void set_os_info_reipl_block(void); 124 125 /* 126 * DIAG 308 support 127 */ 128 enum diag308_subcode { 129 DIAG308_REL_HSA = 2, 130 DIAG308_LOAD_CLEAR = 3, 131 DIAG308_LOAD_NORMAL_DUMP = 4, 132 DIAG308_SET = 5, 133 DIAG308_STORE = 6, 134 }; 135 136 enum diag308_ipl_type { 137 DIAG308_IPL_TYPE_FCP = 0, 138 DIAG308_IPL_TYPE_CCW = 2, 139 }; 140 141 enum diag308_opt { 142 DIAG308_IPL_OPT_IPL = 0x10, 143 DIAG308_IPL_OPT_DUMP = 0x20, 144 }; 145 146 enum diag308_flags { 147 DIAG308_FLAGS_LP_VALID = 0x80, 148 }; 149 150 enum diag308_vm_flags { 151 DIAG308_VM_FLAGS_NSS_VALID = 0x80, 152 DIAG308_VM_FLAGS_VP_VALID = 0x40, 153 }; 154 155 enum diag308_rc { 156 DIAG308_RC_OK = 0x0001, 157 DIAG308_RC_NOCONFIG = 0x0102, 158 }; 159 160 extern int diag308(unsigned long subcode, void *addr); 161 extern void diag308_reset(void); 162 extern void store_status(void (*fn)(void *), void *data); 163 extern void lgr_info_log(void); 164 165 #endif /* _ASM_S390_IPL_H */ 166