text: /*
   * Copyright 2010 Tilera Corporation. All Rights Reserved.
   *
   *   This program is free software; you can redistribute it and/or
   *   modify it under the terms of the GNU General Public License
   *   as published by the Free Software Foundation, version 2.
   *
   *   This program is distributed in the hope that it will be useful, but
   *   WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
   *   NON INFRINGEMENT.  See the GNU General Public License for
   *   more details.
   */
  
  #ifndef _ASM_TILE_STACK_H
  #define _ASM_TILE_STACK_H
  
  #include <linux/types.h>
  #include <linux/sched.h>
  #include <linux/sched/debug.h>
  
  #include <asm/backtrace.h>
  #include <asm/page.h>
  #include <hv/hypervisor.h>
  
  /* Everything we need to keep track of a backtrace iteration */
  struct KBacktraceIterator {
  	BacktraceIterator it;
  	struct task_struct *task;     /* task we are backtracing */
  	int end;		      /* iteration complete. */
  	int new_context;              /* new context is starting */
  	int profile;                  /* profiling, so stop on async intrpt */
  	int verbose;		      /* printk extra info (don't want to
  				       * do this for profiling) */
  	int is_current;               /* backtracing current task */
  };
  
  /* Iteration methods for kernel backtraces */
  
  /*
   * Initialize a KBacktraceIterator from a task_struct, and optionally from
   * a set of registers.  If the registers are omitted, the process is
   * assumed to be descheduled, and registers are read from the process's
   * thread_struct and stack.  "verbose" means to printk some additional
   * information about fault handlers as we pass them on the stack.
   */
  extern void KBacktraceIterator_init(struct KBacktraceIterator *kbt,
  				    struct task_struct *, struct pt_regs *);
  
  /* Initialize iterator based on current stack. */
  extern void KBacktraceIterator_init_current(struct KBacktraceIterator *kbt);
  
  /* Helper method for above. */
  extern void _KBacktraceIterator_init_current(struct KBacktraceIterator *kbt,
  				ulong pc, ulong lr, ulong sp, ulong r52);
  
  /* No more frames? */
  extern int KBacktraceIterator_end(struct KBacktraceIterator *kbt);
  
  /* Advance to the next frame. */
  extern void KBacktraceIterator_next(struct KBacktraceIterator *kbt);
  
  /* Dump just the contents of the pt_regs structure. */
  extern void tile_show_regs(struct pt_regs *);
  
  /*
   * Dump stack given complete register info. Use only from the
   * architecture-specific code; show_stack()
   * and dump_stack() are architecture-independent entry points.
   */
  extern void tile_show_stack(struct KBacktraceIterator *);
  
  #endif /* _ASM_TILE_STACK_H */
  