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mca.h

/*
 * File:    mca.h
 * Purpose: Machine check handling specific defines
 *
 * Copyright (C) 1999, 2004 Silicon Graphics, Inc.
 * Copyright (C) Vijay Chander <vijay@engr.sgi.com>
 * Copyright (C) Srinivasa Thirumalachar <sprasad@engr.sgi.com>
 * Copyright (C) Russ Anderson <rja@sgi.com>
 */

#ifndef _ASM_IA64_MCA_H
#define _ASM_IA64_MCA_H

#if !defined(__ASSEMBLY__)

#include <linux/interrupt.h>
#include <linux/types.h>

#include <asm/param.h>
#include <asm/sal.h>
#include <asm/processor.h>
#include <asm/mca_asm.h>

#define IA64_MCA_RENDEZ_TIMEOUT           (20 * 1000) /* value in milliseconds - 20 seconds */

00026 typedef struct ia64_fptr {
      unsigned long fp;
      unsigned long gp;
} ia64_fptr_t;

00031 typedef union cmcv_reg_u {
      u64   cmcv_regval;
      struct      {
            u64   cmcr_vector       : 8;
            u64   cmcr_reserved1          : 4;
            u64   cmcr_ignored1           : 1;
            u64   cmcr_reserved2          : 3;
            u64   cmcr_mask         : 1;
            u64   cmcr_ignored2           : 47;
      } cmcv_reg_s;

} cmcv_reg_t;

#define cmcv_mask       cmcv_reg_s.cmcr_mask
#define cmcv_vector           cmcv_reg_s.cmcr_vector

enum {
      IA64_MCA_RENDEZ_CHECKIN_NOTDONE     =     0x0,
      IA64_MCA_RENDEZ_CHECKIN_DONE  =     0x1,
      IA64_MCA_RENDEZ_CHECKIN_INIT  =     0x2,
      IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA    =     0x3,
};

/* Information maintained by the MC infrastructure */
00055 typedef struct ia64_mc_info_s {
      u64         imi_mca_handler;
      size_t            imi_mca_handler_size;
      u64         imi_monarch_init_handler;
      size_t            imi_monarch_init_handler_size;
      u64         imi_slave_init_handler;
      size_t            imi_slave_init_handler_size;
      u8          imi_rendez_checkin[NR_CPUS];

} ia64_mc_info_t;

/* Handover state from SAL to OS and vice versa, for both MCA and INIT events.
 * Besides the handover state, it also contains some saved registers from the
 * time of the event.
 * Note: mca_asm.S depends on the precise layout of this structure.
 */

00072 struct ia64_sal_os_state {

      /* SAL to OS */
      u64               os_gp;                  /* GP of the os registered with the SAL, physical */
      u64               pal_proc;         /* PAL_PROC entry point, physical */
      u64               sal_proc;         /* SAL_PROC entry point, physical */
      u64               rv_rc;                  /* MCA - Rendezvous state, INIT - reason code */
      u64               proc_state_param; /* from R18 */
      u64               monarch;          /* 1 for a monarch event, 0 for a slave */

      /* common */
      u64               sal_ra;                 /* Return address in SAL, physical */
      u64               sal_gp;                 /* GP of the SAL - physical */
      pal_min_state_area_t    *pal_min_state;         /* from R17.  physical in asm, virtual in C */
      /* Previous values of IA64_KR(CURRENT) and IA64_KR(CURRENT_STACK).
       * Note: if the MCA/INIT recovery code wants to resume to a new context
       * then it must change these values to reflect the new kernel stack.
       */
      u64               prev_IA64_KR_CURRENT;   /* previous value of IA64_KR(CURRENT) */
      u64               prev_IA64_KR_CURRENT_STACK;
      struct task_struct      *prev_task;       /* previous task, NULL if it is not useful */
      /* Some interrupt registers are not saved in minstate, pt_regs or
       * switch_stack.  Because MCA/INIT can occur when interrupts are
       * disabled, we need to save the additional interrupt registers over
       * MCA/INIT and resume.
       */
      u64               isr;
      u64               ifa;
      u64               itir;
      u64               iipa;
      u64               iim;
      u64               iha;

      /* OS to SAL */
      u64               os_status;        /* OS status to SAL, enum below */
      u64               context;          /* 0 if return to same context
                                             1 if return to new context */
};

enum {
      IA64_MCA_CORRECTED      =     0x0,  /* Error has been corrected by OS_MCA */
      IA64_MCA_WARM_BOOT      =     -1,   /* Warm boot of the system need from SAL */
      IA64_MCA_COLD_BOOT      =     -2,   /* Cold boot of the system need from SAL */
      IA64_MCA_HALT           =     -3    /* System to be halted by SAL */
};

enum {
      IA64_INIT_RESUME  =     0x0,  /* Resume after return from INIT */
      IA64_INIT_WARM_BOOT     =     -1,   /* Warm boot of the system need from SAL */
};

enum {
      IA64_MCA_SAME_CONTEXT   =     0x0,  /* SAL to return to same context */
      IA64_MCA_NEW_CONTEXT    =     -1    /* SAL to return to new context */
};

/* Per-CPU MCA state that is too big for normal per-CPU variables.  */

00130 struct ia64_mca_cpu {
      u64 mca_stack[KERNEL_STACK_SIZE/8];
      u64 init_stack[KERNEL_STACK_SIZE/8];
};

/* Array of physical addresses of each CPU's MCA area.  */
extern unsigned long __per_cpu_mca[NR_CPUS];

extern int cpe_vector;
extern int ia64_cpe_irq;
extern void ia64_mca_init(void);
extern void ia64_mca_cpu_init(void *);
extern void ia64_os_mca_dispatch(void);
extern void ia64_os_mca_dispatch_end(void);
extern void ia64_mca_ucmc_handler(struct pt_regs *, struct ia64_sal_os_state *);
extern void ia64_init_handler(struct pt_regs *,
                        struct switch_stack *,
                        struct ia64_sal_os_state *);
extern void ia64_monarch_init_handler(void);
extern void ia64_slave_init_handler(void);
extern void ia64_mca_cmc_vector_setup(void);
extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *));
extern void ia64_unreg_MCA_extension(void);
extern u64 ia64_get_rnat(u64 *);
extern void ia64_mca_printk(const char * fmt, ...)
       __attribute__ ((format (printf, 1, 2)));

00157 struct ia64_mca_notify_die {
      struct ia64_sal_os_state *sos;
      int *monarch_cpu;
      int *data;
};

DECLARE_PER_CPU(u64, ia64_mca_pal_base);

#else /* __ASSEMBLY__ */

#define IA64_MCA_CORRECTED    0x0   /* Error has been corrected by OS_MCA */
#define IA64_MCA_WARM_BOOT    -1    /* Warm boot of the system need from SAL */
#define IA64_MCA_COLD_BOOT    -2    /* Cold boot of the system need from SAL */
#define IA64_MCA_HALT         -3    /* System to be halted by SAL */

#define IA64_INIT_RESUME      0x0   /* Resume after return from INIT */
#define IA64_INIT_WARM_BOOT   -1    /* Warm boot of the system need from SAL */

#define IA64_MCA_SAME_CONTEXT 0x0   /* SAL to return to same context */
#define IA64_MCA_NEW_CONTEXT  -1    /* SAL to return to new context */

#endif /* !__ASSEMBLY__ */
#endif /* _ASM_IA64_MCA_H */

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