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   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 #define IA64_MCA_STACK_SIZE     8192
  15
  16 #if !defined(__ASSEMBLY__)
  17
  18 #include <linux/interrupt.h>
  19 #include <linux/types.h>
  20
  21 #include <asm/param.h>
  22 #include <asm/sal.h>
  23 #include <asm/processor.h>
  24 #include <asm/mca_asm.h>
  25
  26 #define IA64_MCA_RENDEZ_TIMEOUT         (20 * 1000)     /* value in milliseconds - 20 seconds */
  27
  28 typedef struct ia64_fptr {
  29         unsigned long fp;
  30         unsigned long gp;
  31 } ia64_fptr_t;
  32
  33 typedef union cmcv_reg_u {
  34         u64     cmcv_regval;
  35         struct  {
  36                 u64     cmcr_vector             : 8;
  37                 u64     cmcr_reserved1          : 4;
  38                 u64     cmcr_ignored1           : 1;
  39                 u64     cmcr_reserved2          : 3;
  40                 u64     cmcr_mask               : 1;
  41                 u64     cmcr_ignored2           : 47;
  42         } cmcv_reg_s;
  43
  44 } cmcv_reg_t;
  45
  46 #define cmcv_mask               cmcv_reg_s.cmcr_mask
  47 #define cmcv_vector             cmcv_reg_s.cmcr_vector
  48
  49 enum {
  50         IA64_MCA_RENDEZ_CHECKIN_NOTDONE =       0x0,
  51         IA64_MCA_RENDEZ_CHECKIN_DONE    =       0x1
  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 typedef struct ia64_mca_sal_to_os_state_s {
  67         u64             imsto_os_gp;            /* GP of the os registered with the SAL */
  68         u64             imsto_pal_proc;         /* PAL_PROC entry point - physical addr */
  69         u64             imsto_sal_proc;         /* SAL_PROC entry point - physical addr */
  70         u64             imsto_sal_gp;           /* GP of the SAL - physical */
  71         u64             imsto_rendez_state;     /* Rendez state information */
  72         u64             imsto_sal_check_ra;     /* Return address in SAL_CHECK while going
  73                                                  * back to SAL from OS after MCA handling.
  74                                                  */
  75         u64             pal_min_state;          /* from PAL in r17 */
  76         u64             proc_state_param;       /* from PAL in r18. See SDV 2:268 11.3.2.1 */
  77 } ia64_mca_sal_to_os_state_t;
  78
  79 enum {
  80         IA64_MCA_CORRECTED      =       0x0,    /* Error has been corrected by OS_MCA */
  81         IA64_MCA_WARM_BOOT      =       -1,     /* Warm boot of the system need from SAL */
  82         IA64_MCA_COLD_BOOT      =       -2,     /* Cold boot of the system need from SAL */
  83         IA64_MCA_HALT           =       -3      /* System to be halted by SAL */
  84 };
  85
  86 enum {
  87         IA64_MCA_SAME_CONTEXT   =       0x0,    /* SAL to return to same context */
  88         IA64_MCA_NEW_CONTEXT    =       -1      /* SAL to return to new context */
  89 };
  90
  91 typedef struct ia64_mca_os_to_sal_state_s {
  92         u64             imots_os_status;        /*   OS status to SAL as to what happened
  93                                                  *   with the MCA handling.
  94                                                  */
  95         u64             imots_sal_gp;           /* GP of the SAL - physical */
  96         u64             imots_context;          /* 0 if return to same context
  97                                                    1 if return to new context */
  98         u64             *imots_new_min_state;   /* Pointer to structure containing
  99                                                  * new values of registers in the min state
 100                                                  * save area.
 101                                                  */
 102         u64             imots_sal_check_ra;     /* Return address in SAL_CHECK while going
 103                                                  * back to SAL from OS after MCA handling.
 104                                                  */
 105 } ia64_mca_os_to_sal_state_t;
 106
 107 /* Per-CPU MCA state that is too big for normal per-CPU variables.  */
 108
 109 struct ia64_mca_cpu {
 110         u64 stack[IA64_MCA_STACK_SIZE/8];       /* MCA memory-stack */
 111         u64 proc_state_dump[512];
 112         u64 stackframe[32];
 113         u64 rbstore[IA64_MCA_STACK_SIZE/8];     /* MCA reg.-backing store */
 114         u64 init_stack[KERNEL_STACK_SIZE/8];
 115 } __attribute__ ((aligned(16)));
 116
 117 /* Array of physical addresses of each CPU's MCA area.  */
 118 extern unsigned long __per_cpu_mca[NR_CPUS];
 119
 120 extern void ia64_mca_init(void);
 121 extern void ia64_mca_cpu_init(void *);
 122 extern void ia64_os_mca_dispatch(void);
 123 extern void ia64_os_mca_dispatch_end(void);
 124 extern void ia64_mca_ucmc_handler(void);
 125 extern void ia64_monarch_init_handler(void);
 126 extern void ia64_slave_init_handler(void);
 127 extern void ia64_mca_cmc_vector_setup(void);
 128 extern int  ia64_reg_MCA_extension(void*);
 129 extern void ia64_unreg_MCA_extension(void);
 130
 131 #endif /* !__ASSEMBLY__ */
 132 #endif /* _ASM_IA64_MCA_H */