1/* This file is part of the program psim. 2 3 Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 */ 20 21 22#ifndef _HW_IOBUS_C_ 23#define _HW_IOBUS_C_ 24 25#ifndef STATIC_INLINE_HW_IOBUS 26#define STATIC_INLINE_HW_IOBUS STATIC_INLINE 27#endif 28 29#include "device_table.h" 30 31 32/* DEVICE 33 34 iobus - simple bus for attaching devices 35 36 DESCRIPTION 37 38 IOBUS provides a simple `local' bus for attaching (hanging) 39 programmed IO devices from. All child devices are directly mapped 40 into this devices parent address space (after checking that the 41 attach address lies within the <<iobus>> address range. address). 42 43 PROPERTIES 44 45 None. 46 47 */ 48 49static void 50hw_iobus_attach_address_callback(device *me, 51 attach_type type, 52 int space, 53 unsigned_word addr, 54 unsigned nr_bytes, 55 access_type access, 56 device *client) /*callback/default*/ 57{ 58 int attach_space; 59 unsigned_word attach_address; 60 /* sanity check */ 61 if (space != 0) 62 device_error(me, "invalid space (%d) specified by %s", 63 space, device_path(client)); 64 /* get the bus address */ 65 device_address_to_attach_address(device_parent(me), 66 device_unit_address(me), 67 &attach_space, 68 &attach_address, 69 me); 70 if (addr < attach_address) 71 device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr); 72 device_attach_address(device_parent(me), 73 type, 74 attach_space, 75 addr, 76 nr_bytes, 77 access, 78 client); 79} 80 81 82static device_callbacks const hw_iobus_callbacks = { 83 { NULL, }, 84 { hw_iobus_attach_address_callback, }, 85 { NULL, }, /* IO */ 86 { NULL, }, /* DMA */ 87 { NULL, }, /* interrupt */ 88 { generic_device_unit_decode, 89 generic_device_unit_encode, 90 generic_device_address_to_attach_address, 91 generic_device_size_to_attach_size } 92}; 93 94 95const device_descriptor hw_iobus_device_descriptor[] = { 96 { "iobus", NULL, &hw_iobus_callbacks }, 97 { NULL, }, 98}; 99 100#endif /* _HW_IOBUS_ */ 101