1 /* The common simulator framework for GDB, the GNU Debugger. 2 3 Copyright 2002-2023 Free Software Foundation, Inc. 4 5 Contributed by Andrew Cagney and Red Hat. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 /* This must come before any other includes. */ 23 #include "defs.h" 24 25 #include "sim-main.h" 26 #include "hw-main.h" 27 28 /* DEVICE 29 30 core - root of the device tree 31 32 DESCRIPTION 33 34 The core device, positioned at the root of the device tree appears 35 to its child devices as a normal device just like every other 36 device in the tree. 37 38 Internally it is implemented using a core object. Requests to 39 attach (or detach) address spaces are passed to that core object. 40 Requests to transfer (DMA) data are reflected back down the device 41 tree using the core_map data transfer methods. 42 43 PROPERTIES 44 45 None. 46 47 */ 48 49 50 static void 51 dv_core_attach_address_callback (struct hw *me, 52 int level, 53 int space, 54 address_word addr, 55 address_word nr_bytes, 56 struct hw *client) 57 { 58 HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s", 59 level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client))); 60 /* NOTE: At preset the space is assumed to be zero. Perhaphs the 61 space should be mapped onto something for instance: space0 - 62 unified memory; space1 - IO memory; ... */ 63 sim_core_attach (hw_system (me), 64 NULL, /*cpu*/ 65 level, 66 access_read_write_exec, 67 space, addr, 68 nr_bytes, 69 0, /* modulo */ 70 client, 71 NULL); 72 } 73 74 75 static unsigned 76 dv_core_dma_read_buffer_callback (struct hw *me, 77 void *dest, 78 int space, 79 unsigned_word addr, 80 unsigned nr_bytes) 81 { 82 return sim_core_read_buffer (hw_system (me), 83 NULL, /*CPU*/ 84 space, /*???*/ 85 dest, 86 addr, 87 nr_bytes); 88 } 89 90 91 static unsigned 92 dv_core_dma_write_buffer_callback (struct hw *me, 93 const void *source, 94 int space, 95 unsigned_word addr, 96 unsigned nr_bytes, 97 int violate_read_only_section) 98 { 99 return sim_core_write_buffer (hw_system (me), 100 NULL, /*cpu*/ 101 space, /*???*/ 102 source, 103 addr, 104 nr_bytes); 105 } 106 107 108 static void 109 dv_core_finish (struct hw *me) 110 { 111 set_hw_attach_address (me, dv_core_attach_address_callback); 112 set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback); 113 set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback); 114 } 115 116 const struct hw_descriptor dv_core_descriptor[] = { 117 { "core", dv_core_finish, }, 118 { NULL, NULL }, 119 }; 120