1 /* Handle 0x900000xx addresses in the sim. 2 3 Copyright (C) 2004-2023 Free Software Foundation, Inc. 4 Contributed by Axis Communications. 5 6 This file is part of the GNU simulators. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 /* This must come before any other includes. */ 22 #include "defs.h" 23 24 #include "sim-main.h" 25 #include "hw-main.h" 26 27 struct cris_900000xx_hw 28 { 29 }; 30 31 static unsigned 32 cris_io_write_buffer (struct hw *me, const void *source, 33 int space, address_word addr, unsigned nr_bytes) 34 { 35 static const unsigned char ok[] = { 4, 0, 0, 0x90}; 36 static const unsigned char bad[] = { 8, 0, 0, 0x90}; 37 SIM_CPU *cpu = hw_system_cpu (me); 38 SIM_DESC sd = CPU_STATE (cpu); 39 sim_cia cia = CPU_PC_GET (cpu); 40 41 if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0) 42 return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia); 43 else if (addr == 0x90000008 44 && memcmp (source, bad, sizeof bad) == 0) 45 return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia); 46 47 /* If it wasn't one of those, send an invalid-memory signal. */ 48 sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr, 49 write_transfer, sim_core_unmapped_signal); 50 51 return 0; 52 } 53 54 /* Instance initializer function. */ 55 56 static void 57 attach_regs (struct hw *me, struct cris_900000xx_hw *hw) 58 { 59 address_word attach_address; 60 int attach_space; 61 unsigned attach_size; 62 reg_property_spec reg; 63 64 if (hw_find_property (me, "reg") == NULL) 65 hw_abort (me, "Missing \"reg\" property"); 66 67 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 68 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 69 70 hw_unit_address_to_attach_address (hw_parent (me), 71 ®.address, 72 &attach_space, &attach_address, me); 73 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 74 75 hw_attach_address (hw_parent (me), 76 0, attach_space, attach_address, attach_size, me); 77 } 78 79 static void 80 cris_900000xx_finish (struct hw *me) 81 { 82 struct cris_900000xx_hw *hw; 83 84 hw = HW_ZALLOC (me, struct cris_900000xx_hw); 85 set_hw_data (me, hw); 86 set_hw_io_write_buffer (me, cris_io_write_buffer); 87 88 attach_regs (me, hw); 89 } 90 91 const struct hw_descriptor dv_cris_900000xx_descriptor[] = { 92 { "cris_900000xx", cris_900000xx_finish, }, 93 { NULL }, 94 }; 95