| 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 | }; |