Subversion Repositories openrisc_2011-10-31

/* Memory attributes support, for GDB.
 
   Copyright (C) 2001, 2006, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
 
   This file is part of GDB.
 
   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; either version 3 of the License, or
   (at your option) any later version.
 
   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.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
#ifndef MEMATTR_H
#define MEMATTR_H
 
#include "vec.h"
 
enum mem_access_mode
{
  MEM_NONE,                     /* Memory that is not physically present. */
  MEM_RW,			/* read/write */
  MEM_RO,			/* read only */
  MEM_WO,			/* write only */
 
  /* Read/write, but special steps are required to write to it.  */
  MEM_FLASH
};
 
enum mem_access_width
{
  MEM_WIDTH_UNSPECIFIED,
  MEM_WIDTH_8,			/*  8 bit accesses */
  MEM_WIDTH_16,			/* 16  "      "    */
  MEM_WIDTH_32,			/* 32  "      "    */
  MEM_WIDTH_64			/* 64  "      "    */
};
 
/* The set of all attributes that can be set for a memory region.
 
   This structure was created so that memory attributes can be passed
   to target_ functions without exposing the details of memory region
   list, which would be necessary if these fields were simply added to
   the mem_region structure.
 
   FIXME: It would be useful if there was a mechanism for targets to
   add their own attributes.  For example, the number of wait states. */
 
struct mem_attrib 
{
  /* read/write, read-only, or write-only */
  enum mem_access_mode mode;
 
  enum mem_access_width width;
 
  /* enables hardware breakpoints */
  int hwbreak;
 
  /* enables host-side caching of memory region data */
  int cache;
 
  /* enables memory verification.  after a write, memory is re-read
     to verify that the write was successful. */
  int verify; 
 
  /* Block size.  Only valid if mode == MEM_FLASH.  */
  int blocksize;
};
 
struct mem_region 
{
  /* Lowest address in the region.  */
  CORE_ADDR lo;
  /* Address past the highest address of the region. 
     If 0, upper bound is "infinity".  */
  CORE_ADDR hi;
 
  /* Item number of this memory region. */
  int number;
 
  /* Status of this memory region (enabled if non-zero, otherwise disabled) */
  int enabled_p;
 
  /* Attributes for this region */
  struct mem_attrib attrib;
};
 
/* Declare a vector type for a group of mem_region structures.  The
   typedef is necessary because vec.h can not handle a struct tag.
   Except during construction, these vectors are kept sorted.  */
typedef struct mem_region mem_region_s;
DEF_VEC_O(mem_region_s);
 
extern struct mem_region *lookup_mem_region(CORE_ADDR);
 
void invalidate_target_mem_regions (void);
 
void mem_region_init (struct mem_region *);
 
int mem_region_cmp (const void *, const void *);
 
#endif	/* MEMATTR_H */