1 /* Handle 0x900000xx addresses in the sim. 2 3 Copyright (C) 2004-2020 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 #include "sim-main.h" 22 #include "hw-main.h" 23 24 struct cris_900000xx_hw 25 { 26 }; 27 28 static unsigned 29 cris_io_write_buffer (struct hw *me, const void *source, 30 int space, address_word addr, unsigned nr_bytes) 31 { 32 static const unsigned char ok[] = { 4, 0, 0, 0x90}; 33 static const unsigned char bad[] = { 8, 0, 0, 0x90}; 34 SIM_CPU *cpu = hw_system_cpu (me); 35 SIM_DESC sd = CPU_STATE (cpu); 36 sim_cia cia = CPU_PC_GET (cpu); 37 38 if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0) 39 return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia); 40 else if (addr == 0x90000008 41 && memcmp (source, bad, sizeof bad) == 0) 42 return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia); 43 44 /* If it wasn't one of those, send an invalid-memory signal. */ 45 sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr, 46 write_transfer, sim_core_unmapped_signal); 47 48 return 0; 49 } 50 51 /* Instance initializer function. */ 52 53 static void 54 attach_regs (struct hw *me, struct cris_900000xx_hw *hw) 55 { 56 address_word attach_address; 57 int attach_space; 58 unsigned attach_size; 59 reg_property_spec reg; 60 61 if (hw_find_property (me, "reg") == NULL) 62 hw_abort (me, "Missing \"reg\" property"); 63 64 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 65 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 66 67 hw_unit_address_to_attach_address (hw_parent (me), 68 ®.address, 69 &attach_space, &attach_address, me); 70 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 71 72 hw_attach_address (hw_parent (me), 73 0, attach_space, attach_address, attach_size, me); 74 } 75 76 static void 77 cris_900000xx_finish (struct hw *me) 78 { 79 struct cris_900000xx_hw *hw; 80 81 hw = HW_ZALLOC (me, struct cris_900000xx_hw); 82 set_hw_data (me, hw); 83 set_hw_io_write_buffer (me, cris_io_write_buffer); 84 85 attach_regs (me, hw); 86 } 87 88 const struct hw_descriptor dv_cris_900000xx_descriptor[] = { 89 { "cris_900000xx", cris_900000xx_finish, }, 90 { NULL }, 91 }; 92