arch/ia64/include/asm/mca.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * File:        mca.h
   4  * Purpose:     Machine check handling specific defines
   5  *
   6  * Copyright (C) 1999, 2004 Silicon Graphics, Inc.
   7  * Copyright (C) Vijay Chander <vijay@engr.sgi.com>
   8  * Copyright (C) Srinivasa Thirumalachar <sprasad@engr.sgi.com>
   9  * Copyright (C) Russ Anderson <rja@sgi.com>
  10  */
  11
  12 #ifndef _ASM_IA64_MCA_H
  13 #define _ASM_IA64_MCA_H
  14
  15 #if !defined(__ASSEMBLY__)
  16
  17 #include <linux/interrupt.h>
  18 #include <linux/types.h>
  19
  20 #include <asm/param.h>
  21 #include <asm/sal.h>
  22 #include <asm/processor.h>
  23 #include <asm/mca_asm.h>
  24
  25 #define IA64_MCA_RENDEZ_TIMEOUT         (20 * 1000)     /* value in milliseconds - 20 seconds */
  26
  27 typedef struct ia64_fptr {
  28         unsigned long fp;
  29         unsigned long gp;
  30 } ia64_fptr_t;
  31
  32 typedef union cmcv_reg_u {
  33         u64     cmcv_regval;
  34         struct  {
  35                 u64     cmcr_vector             : 8;
  36                 u64     cmcr_reserved1          : 4;
  37                 u64     cmcr_ignored1           : 1;
  38                 u64     cmcr_reserved2          : 3;
  39                 u64     cmcr_mask               : 1;
  40                 u64     cmcr_ignored2           : 47;
  41         } cmcv_reg_s;
  42
  43 } cmcv_reg_t;
  44
  45 #define cmcv_mask               cmcv_reg_s.cmcr_mask
  46 #define cmcv_vector             cmcv_reg_s.cmcr_vector
  47
  48 enum {
  49         IA64_MCA_RENDEZ_CHECKIN_NOTDONE =       0x0,
  50         IA64_MCA_RENDEZ_CHECKIN_DONE    =       0x1,
  51         IA64_MCA_RENDEZ_CHECKIN_INIT    =       0x2,
  52         IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA  =       0x3,
  53 };
  54
  55 /* Information maintained by the MC infrastructure */
  56 typedef struct ia64_mc_info_s {
  57         u64             imi_mca_handler;
  58         size_t          imi_mca_handler_size;
  59         u64             imi_monarch_init_handler;
  60         size_t          imi_monarch_init_handler_size;
  61         u64             imi_slave_init_handler;
  62         size_t          imi_slave_init_handler_size;
  63         u8              imi_rendez_checkin[NR_CPUS];
  64
  65 } ia64_mc_info_t;
  66
  67 /* Handover state from SAL to OS and vice versa, for both MCA and INIT events.
  68  * Besides the handover state, it also contains some saved registers from the
  69  * time of the event.
  70  * Note: mca_asm.S depends on the precise layout of this structure.
  71  */
  72
  73 struct ia64_sal_os_state {
  74
  75         /* SAL to OS */
  76         unsigned long           os_gp;                  /* GP of the os registered with the SAL, physical */
  77         unsigned long           pal_proc;               /* PAL_PROC entry point, physical */
  78         unsigned long           sal_proc;               /* SAL_PROC entry point, physical */
  79         unsigned long           rv_rc;                  /* MCA - Rendezvous state, INIT - reason code */
  80         unsigned long           proc_state_param;       /* from R18 */
  81         unsigned long           monarch;                /* 1 for a monarch event, 0 for a slave */
  82
  83         /* common */
  84         unsigned long           sal_ra;                 /* Return address in SAL, physical */
  85         unsigned long           sal_gp;                 /* GP of the SAL - physical */
  86         pal_min_state_area_t    *pal_min_state;         /* from R17.  physical in asm, virtual in C */
  87         /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
  88          * Note: if the MCA/INIT recovery code wants to resume to a new context
  89          * then it must change these values to reflect the new kernel stack.
  90          */
  91         unsigned long           prev_IA64_KR_CURRENT;   /* previous value of IA64_KR(CURRENT) */
  92         unsigned long           prev_IA64_KR_CURRENT_STACK;
  93         struct task_struct      *prev_task;             /* previous task, NULL if it is not useful */
  94         /* Some interrupt registers are not saved in minstate, pt_regs or
  95          * switch_stack.  Because MCA/INIT can occur when interrupts are
  96          * disabled, we need to save the additional interrupt registers over
  97          * MCA/INIT and resume.
  98          */
  99         unsigned long           isr;
 100         unsigned long           ifa;
 101         unsigned long           itir;
 102         unsigned long           iipa;
 103         unsigned long           iim;
 104         unsigned long           iha;
 105
 106         /* OS to SAL */
 107         unsigned long           os_status;              /* OS status to SAL, enum below */
 108         unsigned long           context;                /* 0 if return to same context
 109                                                            1 if return to new context */
 110
 111         /* I-resources */
 112         unsigned long           iip;
 113         unsigned long           ipsr;
 114         unsigned long           ifs;
 115 };
 116
 117 enum {
 118         IA64_MCA_CORRECTED      =       0x0,    /* Error has been corrected by OS_MCA */
 119         IA64_MCA_WARM_BOOT      =       -1,     /* Warm boot of the system need from SAL */
 120         IA64_MCA_COLD_BOOT      =       -2,     /* Cold boot of the system need from SAL */
 121         IA64_MCA_HALT           =       -3      /* System to be halted by SAL */
 122 };
 123
 124 enum {
 125         IA64_INIT_RESUME        =       0x0,    /* Resume after return from INIT */
 126         IA64_INIT_WARM_BOOT     =       -1,     /* Warm boot of the system need from SAL */
 127 };
 128
 129 enum {
 130         IA64_MCA_SAME_CONTEXT   =       0x0,    /* SAL to return to same context */
 131         IA64_MCA_NEW_CONTEXT    =       -1      /* SAL to return to new context */
 132 };
 133
 134 /* Per-CPU MCA state that is too big for normal per-CPU variables.  */
 135
 136 struct ia64_mca_cpu {
 137         u64 mca_stack[KERNEL_STACK_SIZE/8];
 138         u64 init_stack[KERNEL_STACK_SIZE/8];
 139 };
 140
 141 /* Array of physical addresses of each CPU's MCA area.  */
 142 extern unsigned long __per_cpu_mca[NR_CPUS];
 143
 144 extern int cpe_vector;
 145 extern int ia64_cpe_irq;
 146 extern void ia64_mca_init(void);
 147 extern void ia64_mca_irq_init(void);
 148 extern void ia64_mca_cpu_init(void *);
 149 extern void ia64_os_mca_dispatch(void);
 150 extern void ia64_os_mca_dispatch_end(void);
 151 extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
 152 extern void ia64_init_handler(struct pt_regs *,
 153                               struct switch_stack *,
 154                               struct ia64_sal_os_state *);
 155 extern void ia64_os_init_on_kdump(void);
 156 extern void ia64_monarch_init_handler(void);
 157 extern void ia64_slave_init_handler(void);
 158 extern void ia64_mca_cmc_vector_setup(void);
 159 extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
 160 extern void ia64_unreg_MCA_extension(void);
 161 extern unsigned long ia64_get_rnat(unsigned long *);
 162 extern void ia64_set_psr_mc(void);
 163 extern void ia64_mca_printk(const char * fmt, ...)
 164          __attribute__ ((format (printf, 1, 2)));
 165
 166 struct ia64_mca_notify_die {
 167         struct ia64_sal_os_state *sos;
 168         int *monarch_cpu;
 169         int *data;
 170 };
 171
 172 DECLARE_PER_CPU(u64, ia64_mca_pal_base);
 173
 174 #else   /* __ASSEMBLY__ */
 175
 176 #define IA64_MCA_CORRECTED      0x0     /* Error has been corrected by OS_MCA */
 177 #define IA64_MCA_WARM_BOOT      -1      /* Warm boot of the system need from SAL */
 178 #define IA64_MCA_COLD_BOOT      -2      /* Cold boot of the system need from SAL */
 179 #define IA64_MCA_HALT           -3      /* System to be halted by SAL */
 180
 181 #define IA64_INIT_RESUME        0x0     /* Resume after return from INIT */
 182 #define IA64_INIT_WARM_BOOT     -1      /* Warm boot of the system need from SAL */
 183
 184 #define IA64_MCA_SAME_CONTEXT   0x0     /* SAL to return to same context */
 185 #define IA64_MCA_NEW_CONTEXT    -1      /* SAL to return to new context */
 186
 187 #endif /* !__ASSEMBLY__ */
 188 #endif /* _ASM_IA64_MCA_H */