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 3 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, see <http://www.gnu.org/licenses/>. 17 18 */ 19 20 21 #ifndef _HW_IOBUS_C_ 22 #define _HW_IOBUS_C_ 23 24 #ifndef STATIC_INLINE_HW_IOBUS 25 #define STATIC_INLINE_HW_IOBUS STATIC_INLINE 26 #endif 27 28 #include "device_table.h" 29 30 31 /* DEVICE 32 33 iobus - simple bus for attaching devices 34 35 DESCRIPTION 36 37 IOBUS provides a simple `local' bus for attaching (hanging) 38 programmed IO devices from. All child devices are directly mapped 39 into this devices parent address space (after checking that the 40 attach address lies within the <<iobus>> address range. address). 41 42 PROPERTIES 43 44 None. 45 46 */ 47 48 static void 49 hw_iobus_attach_address_callback(device *me, 50 attach_type type, 51 int space, 52 unsigned_word addr, 53 unsigned nr_bytes, 54 access_type access, 55 device *client) /*callback/default*/ 56 { 57 int attach_space; 58 unsigned_word attach_address; 59 /* sanity check */ 60 if (space != 0) 61 device_error(me, "invalid space (%d) specified by %s", 62 space, device_path(client)); 63 /* get the bus address */ 64 device_address_to_attach_address(device_parent(me), 65 device_unit_address(me), 66 &attach_space, 67 &attach_address, 68 me); 69 if (addr < attach_address) 70 device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr); 71 device_attach_address(device_parent(me), 72 type, 73 attach_space, 74 addr, 75 nr_bytes, 76 access, 77 client); 78 } 79 80 81 static device_callbacks const hw_iobus_callbacks = { 82 { NULL, }, 83 { hw_iobus_attach_address_callback, }, 84 { NULL, }, /* IO */ 85 { NULL, }, /* DMA */ 86 { NULL, }, /* interrupt */ 87 { generic_device_unit_decode, 88 generic_device_unit_encode, 89 generic_device_address_to_attach_address, 90 generic_device_size_to_attach_size } 91 }; 92 93 94 const device_descriptor hw_iobus_device_descriptor[] = { 95 { "iobus", NULL, &hw_iobus_callbacks }, 96 { NULL, }, 97 }; 98 99 #endif /* _HW_IOBUS_ */ 100