1 /* Memory attributes support, for GDB. 2 Copyright 2001 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21 #ifndef MEMATTR_H 22 #define MEMATTR_H 23 24 enum mem_access_mode 25 { 26 MEM_RW, /* read/write */ 27 MEM_RO, /* read only */ 28 MEM_WO /* write only */ 29 }; 30 31 enum mem_access_width 32 { 33 MEM_WIDTH_UNSPECIFIED, 34 MEM_WIDTH_8, /* 8 bit accesses */ 35 MEM_WIDTH_16, /* 16 " " */ 36 MEM_WIDTH_32, /* 32 " " */ 37 MEM_WIDTH_64 /* 64 " " */ 38 }; 39 40 /* The set of all attributes that can be set for a memory region. 41 42 This structure was created so that memory attributes can be passed 43 to target_ functions without exposing the details of memory region 44 list, which would be necessary if these fields were simply added to 45 the mem_region structure. 46 47 FIXME: It would be useful if there was a mechanism for targets to 48 add their own attributes. For example, the number of wait states. */ 49 50 struct mem_attrib 51 { 52 /* read/write, read-only, or write-only */ 53 enum mem_access_mode mode; 54 55 enum mem_access_width width; 56 57 /* enables hardware breakpoints */ 58 int hwbreak; 59 60 /* enables host-side caching of memory region data */ 61 int cache; 62 63 /* enables memory verification. after a write, memory is re-read 64 to verify that the write was successful. */ 65 int verify; 66 }; 67 68 struct mem_region 69 { 70 /* FIXME: memory regions are stored in an unsorted singly-linked 71 list. This probably won't scale to handle hundreds of memory 72 regions --- that many could be needed to describe the allowed 73 access modes for memory mapped i/o device registers. */ 74 struct mem_region *next; 75 76 CORE_ADDR lo; 77 CORE_ADDR hi; 78 79 /* Item number of this memory region. */ 80 int number; 81 82 /* Status of this memory region (enabled if non-zero, otherwise disabled) */ 83 int enabled_p; 84 85 /* Attributes for this region */ 86 struct mem_attrib attrib; 87 }; 88 89 extern struct mem_region *lookup_mem_region(CORE_ADDR); 90 91 #endif /* MEMATTR_H */ 92