arch/s390/include/asm/ipl.h

   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 #include <uapi/asm/ipl.h>
  16
  17 struct ipl_parameter_block {
  18         struct ipl_pl_hdr hdr;
  19         union {
  20                 struct ipl_pb_hdr pb0_hdr;
  21                 struct ipl_pb0_common common;
  22                 struct ipl_pb0_fcp fcp;
  23                 struct ipl_pb0_ccw ccw;
  24                 char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
  25         };
  26 } __packed __aligned(PAGE_SIZE);
  27
  28 #define NSS_NAME_SIZE 8
  29
  30 #define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
  31                               sizeof(struct ipl_pb0_fcp))
  32 #define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
  33 #define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
  34                               sizeof(struct ipl_pb0_ccw))
  35 #define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
  36
  37 #define IPL_MAX_SUPPORTED_VERSION (0)
  38
  39 #define IPL_RB_CERT_UNKNOWN ((unsigned short)-1)
  40
  41 #define DIAG308_VMPARM_SIZE (64)
  42 #define DIAG308_SCPDATA_OFFSET offsetof(struct ipl_parameter_block, \
  43                                         fcp.scp_data)
  44 #define DIAG308_SCPDATA_SIZE (PAGE_SIZE - DIAG308_SCPDATA_OFFSET)
  45
  46 struct save_area;
  47 struct save_area * __init save_area_alloc(bool is_boot_cpu);
  48 struct save_area * __init save_area_boot_cpu(void);
  49 void __init save_area_add_regs(struct save_area *, void *regs);
  50 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
  51
  52 extern void s390_reset_system(void);
  53 extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
  54                                          const struct ipl_parameter_block *ipb);
  55
  56 enum ipl_type {
  57         IPL_TYPE_UNKNOWN        = 1,
  58         IPL_TYPE_CCW            = 2,
  59         IPL_TYPE_FCP            = 4,
  60         IPL_TYPE_FCP_DUMP       = 8,
  61         IPL_TYPE_NSS            = 16,
  62 };
  63
  64 struct ipl_info
  65 {
  66         enum ipl_type type;
  67         union {
  68                 struct {
  69                         struct ccw_dev_id dev_id;
  70                 } ccw;
  71                 struct {
  72                         struct ccw_dev_id dev_id;
  73                         u64 wwpn;
  74                         u64 lun;
  75                 } fcp;
  76                 struct {
  77                         char name[NSS_NAME_SIZE + 1];
  78                 } nss;
  79         } data;
  80 };
  81
  82 extern struct ipl_info ipl_info;
  83 extern void setup_ipl(void);
  84 extern void set_os_info_reipl_block(void);
  85
  86 struct ipl_report {
  87         struct ipl_parameter_block *ipib;
  88         struct list_head components;
  89         struct list_head certificates;
  90         size_t size;
  91 };
  92
  93 struct ipl_report_component {
  94         struct list_head list;
  95         struct ipl_rb_component_entry entry;
  96 };
  97
  98 struct ipl_report_certificate {
  99         struct list_head list;
 100         struct ipl_rb_certificate_entry entry;
 101         void *key;
 102 };
 103
 104 struct kexec_buf;
 105 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib);
 106 void *ipl_report_finish(struct ipl_report *report);
 107 int ipl_report_free(struct ipl_report *report);
 108 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
 109                              unsigned char flags, unsigned short cert);
 110 int ipl_report_add_certificate(struct ipl_report *report, void *key,
 111                                unsigned long addr, unsigned long len);
 112
 113 /*
 114  * DIAG 308 support
 115  */
 116 enum diag308_subcode  {
 117         DIAG308_REL_HSA = 2,
 118         DIAG308_LOAD_CLEAR = 3,
 119         DIAG308_LOAD_NORMAL_DUMP = 4,
 120         DIAG308_SET = 5,
 121         DIAG308_STORE = 6,
 122 };
 123
 124 enum diag308_rc {
 125         DIAG308_RC_OK           = 0x0001,
 126         DIAG308_RC_NOCONFIG     = 0x0102,
 127 };
 128
 129 extern int diag308(unsigned long subcode, void *addr);
 130 extern void store_status(void (*fn)(void *), void *data);
 131 extern void lgr_info_log(void);
 132
 133 #endif /* _ASM_S390_IPL_H */