arch/ia64/include/asm/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         IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA  =       0x3,
  52 };
  53
  54 /* Information maintained by the MC infrastructure */
  55 typedef struct ia64_mc_info_s {
  56         u64             imi_mca_handler;
  57         size_t          imi_mca_handler_size;
  58         u64             imi_monarch_init_handler;
  59         size_t          imi_monarch_init_handler_size;
  60         u64             imi_slave_init_handler;
  61         size_t          imi_slave_init_handler_size;
  62         u8              imi_rendez_checkin[NR_CPUS];
  63
  64 } ia64_mc_info_t;
  65
  66 /* Handover state from SAL to OS and vice versa, for both MCA and INIT events.
  67  * Besides the handover state, it also contains some saved registers from the
  68  * time of the event.
  69  * Note: mca_asm.S depends on the precise layout of this structure.
  70  */
  71
  72 struct ia64_sal_os_state {
  73
  74         /* SAL to OS */
  75         u64                     os_gp;                  /* GP of the os registered with the SAL, physical */
  76         u64                     pal_proc;               /* PAL_PROC entry point, physical */
  77         u64                     sal_proc;               /* SAL_PROC entry point, physical */
  78         u64                     rv_rc;                  /* MCA - Rendezvous state, INIT - reason code */
  79         u64                     proc_state_param;       /* from R18 */
  80         u64                     monarch;                /* 1 for a monarch event, 0 for a slave */
  81
  82         /* common */
  83         u64                     sal_ra;                 /* Return address in SAL, physical */
  84         u64                     sal_gp;                 /* GP of the SAL - physical */
  85         pal_min_state_area_t    *pal_min_state;         /* from R17.  physical in asm, virtual in C */
  86         /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
  87          * Note: if the MCA/INIT recovery code wants to resume to a new context
  88          * then it must change these values to reflect the new kernel stack.
  89          */
  90         u64                     prev_IA64_KR_CURRENT;   /* previous value of IA64_KR(CURRENT) */
  91         u64                     prev_IA64_KR_CURRENT_STACK;
  92         struct task_struct      *prev_task;             /* previous task, NULL if it is not useful */
  93         /* Some interrupt registers are not saved in minstate, pt_regs or
  94          * switch_stack.  Because MCA/INIT can occur when interrupts are
  95          * disabled, we need to save the additional interrupt registers over
  96          * MCA/INIT and resume.
  97          */
  98         u64                     isr;
  99         u64                     ifa;
 100         u64                     itir;
 101         u64                     iipa;
 102         u64                     iim;
 103         u64                     iha;
 104
 105         /* OS to SAL */
 106         u64                     os_status;              /* OS status to SAL, enum below */
 107         u64                     context;                /* 0 if return to same context
 108                                                            1 if return to new context */
 109 };
 110
 111 enum {
 112         IA64_MCA_CORRECTED      =       0x0,    /* Error has been corrected by OS_MCA */
 113         IA64_MCA_WARM_BOOT      =       -1,     /* Warm boot of the system need from SAL */
 114         IA64_MCA_COLD_BOOT      =       -2,     /* Cold boot of the system need from SAL */
 115         IA64_MCA_HALT           =       -3      /* System to be halted by SAL */
 116 };
 117
 118 enum {
 119         IA64_INIT_RESUME        =       0x0,    /* Resume after return from INIT */
 120         IA64_INIT_WARM_BOOT     =       -1,     /* Warm boot of the system need from SAL */
 121 };
 122
 123 enum {
 124         IA64_MCA_SAME_CONTEXT   =       0x0,    /* SAL to return to same context */
 125         IA64_MCA_NEW_CONTEXT    =       -1      /* SAL to return to new context */
 126 };
 127
 128 /* Per-CPU MCA state that is too big for normal per-CPU variables.  */
 129
 130 struct ia64_mca_cpu {
 131         u64 mca_stack[KERNEL_STACK_SIZE/8];
 132         u64 init_stack[KERNEL_STACK_SIZE/8];
 133 };
 134
 135 /* Array of physical addresses of each CPU's MCA area.  */
 136 extern unsigned long __per_cpu_mca[NR_CPUS];
 137
 138 extern int cpe_vector;
 139 extern int ia64_cpe_irq;
 140 extern void ia64_mca_init(void);
 141 extern void ia64_mca_cpu_init(void *);
 142 extern void ia64_os_mca_dispatch(void);
 143 extern void ia64_os_mca_dispatch_end(void);
 144 extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
 145 extern void ia64_init_handler(struct pt_regs *,
 146                               struct switch_stack *,
 147                               struct ia64_sal_os_state *);
 148 extern void ia64_monarch_init_handler(void);
 149 extern void ia64_slave_init_handler(void);
 150 extern void ia64_mca_cmc_vector_setup(void);
 151 extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
 152 extern void ia64_unreg_MCA_extension(void);
 153 extern u64 ia64_get_rnat(u64 *);
 154 extern void ia64_mca_printk(const char * fmt, ...)
 155          __attribute__ ((format (printf, 1, 2)));
 156
 157 struct ia64_mca_notify_die {
 158         struct ia64_sal_os_state *sos;
 159         int *monarch_cpu;
 160         int *data;
 161 };
 162
 163 DECLARE_PER_CPU(u64, ia64_mca_pal_base);
 164
 165 #else   /* __ASSEMBLY__ */
 166
 167 #define IA64_MCA_CORRECTED      0x0     /* Error has been corrected by OS_MCA */
 168 #define IA64_MCA_WARM_BOOT      -1      /* Warm boot of the system need from SAL */
 169 #define IA64_MCA_COLD_BOOT      -2      /* Cold boot of the system need from SAL */
 170 #define IA64_MCA_HALT           -3      /* System to be halted by SAL */
 171
 172 #define IA64_INIT_RESUME        0x0     /* Resume after return from INIT */
 173 #define IA64_INIT_WARM_BOOT     -1      /* Warm boot of the system need from SAL */
 174
 175 #define IA64_MCA_SAME_CONTEXT   0x0     /* SAL to return to same context */
 176 #define IA64_MCA_NEW_CONTEXT    -1      /* SAL to return to new context */
 177
 178 #endif /* !__ASSEMBLY__ */
 179 #endif /* _ASM_IA64_MCA_H */