LXR linux/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
  26typedef struct ia64_fptr {
  27        unsigned long fp;
  28        unsigned long gp;
  29} ia64_fptr_t;
  30
  31typedef 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
  47enum {
  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 */
  55typedef 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
  72struct ia64_sal_os_state {
  73
  74        /* SAL to OS */
  75        unsigned long           os_gp;                  /* GP of the os registered with the SAL, physical */
  76        unsigned long           pal_proc;               /* PAL_PROC entry point, physical */
  77        unsigned long           sal_proc;               /* SAL_PROC entry point, physical */
  78        unsigned long           rv_rc;                  /* MCA - Rendezvous state, INIT - reason code */
  79        unsigned long           proc_state_param;       /* from R18 */
  80        unsigned long           monarch;                /* 1 for a monarch event, 0 for a slave */
  81
  82        /* common */
  83        unsigned long           sal_ra;                 /* Return address in SAL, physical */
  84        unsigned long           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        unsigned long           prev_IA64_KR_CURRENT;   /* previous value of IA64_KR(CURRENT) */
  91        unsigned long           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        unsigned long           isr;
  99        unsigned long           ifa;
 100        unsigned long           itir;
 101        unsigned long           iipa;
 102        unsigned long           iim;
 103        unsigned long           iha;
 104
 105        /* OS to SAL */
 106        unsigned long           os_status;              /* OS status to SAL, enum below */
 107        unsigned long           context;                /* 0 if return to same context
 108                                                           1 if return to new context */
 109
 110        /* I-resources */
 111        unsigned long           iip;
 112        unsigned long           ipsr;
 113        unsigned long           ifs;
 114};
 115
 116enum {
 117        IA64_MCA_CORRECTED      =       0x0,    /* Error has been corrected by OS_MCA */
 118        IA64_MCA_WARM_BOOT      =       -1,     /* Warm boot of the system need from SAL */
 119        IA64_MCA_COLD_BOOT      =       -2,     /* Cold boot of the system need from SAL */
 120        IA64_MCA_HALT           =       -3      /* System to be halted by SAL */
 121};
 122
 123enum {
 124        IA64_INIT_RESUME        =       0x0,    /* Resume after return from INIT */
 125        IA64_INIT_WARM_BOOT     =       -1,     /* Warm boot of the system need from SAL */
 126};
 127
 128enum {
 129        IA64_MCA_SAME_CONTEXT   =       0x0,    /* SAL to return to same context */
 130        IA64_MCA_NEW_CONTEXT    =       -1      /* SAL to return to new context */
 131};
 132
 133/* Per-CPU MCA state that is too big for normal per-CPU variables.  */
 134
 135struct ia64_mca_cpu {
 136        u64 mca_stack[KERNEL_STACK_SIZE/8];
 137        u64 init_stack[KERNEL_STACK_SIZE/8];
 138};
 139
 140/* Array of physical addresses of each CPU's MCA area.  */
 141extern unsigned long __per_cpu_mca[NR_CPUS];
 142
 143extern int cpe_vector;
 144extern int ia64_cpe_irq;
 145extern void ia64_mca_init(void);
 146extern void ia64_mca_irq_init(void);
 147extern void ia64_mca_cpu_init(void *);
 148extern void ia64_os_mca_dispatch(void);
 149extern void ia64_os_mca_dispatch_end(void);
 150extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
 151extern void ia64_init_handler(struct pt_regs *,
 152                              struct switch_stack *,
 153                              struct ia64_sal_os_state *);
 154extern void ia64_os_init_on_kdump(void);
 155extern void ia64_monarch_init_handler(void);
 156extern void ia64_slave_init_handler(void);
 157extern void ia64_mca_cmc_vector_setup(void);
 158extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
 159extern void ia64_unreg_MCA_extension(void);
 160extern unsigned long ia64_get_rnat(unsigned long *);
 161extern void ia64_set_psr_mc(void);
 162extern void ia64_mca_printk(const char * fmt, ...)
 163         __attribute__ ((format (printf, 1, 2)));
 164
 165struct ia64_mca_notify_die {
 166        struct ia64_sal_os_state *sos;
 167        int *monarch_cpu;
 168        int *data;
 169};
 170
 171DECLARE_PER_CPU(u64, ia64_mca_pal_base);
 172
 173#else   /* __ASSEMBLY__ */
 174
 175#define IA64_MCA_CORRECTED      0x0     /* Error has been corrected by OS_MCA */
 176#define IA64_MCA_WARM_BOOT      -1      /* Warm boot of the system need from SAL */
 177#define IA64_MCA_COLD_BOOT      -2      /* Cold boot of the system need from SAL */
 178#define IA64_MCA_HALT           -3      /* System to be halted by SAL */
 179
 180#define IA64_INIT_RESUME        0x0     /* Resume after return from INIT */
 181#define IA64_INIT_WARM_BOOT     -1      /* Warm boot of the system need from SAL */
 182
 183#define IA64_MCA_SAME_CONTEXT   0x0     /* SAL to return to same context */
 184#define IA64_MCA_NEW_CONTEXT    -1      /* SAL to return to new context */
 185
 186#endif /* !__ASSEMBLY__ */
 187#endif /* _ASM_IA64_MCA_H */
 188