include/asm-ia64/mca.h

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