1 /* Blackfin Event Vector Table (EVT) model. 2 3 Copyright (C) 2010-2024 Free Software Foundation, Inc. 4 Contributed by Analog Devices, Inc. 5 6 This file is part of 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 "devices.h" 26 #include "dv-bfin_cec.h" 27 #include "dv-bfin_evt.h" 28 29 struct bfin_evt 30 { 31 bu32 base; 32 33 /* Order after here is important -- matches hardware MMR layout. */ 34 bu32 evt[16]; 35 }; 36 #define mmr_base() offsetof(struct bfin_evt, evt[0]) 37 #define mmr_offset(mmr) (offsetof(struct bfin_evt, mmr) - mmr_base()) 38 39 static const char * const mmr_names[] = 40 { 41 "EVT0", "EVT1", "EVT2", "EVT3", "EVT4", "EVT5", "EVT6", "EVT7", "EVT8", 42 "EVT9", "EVT10", "EVT11", "EVT12", "EVT13", "EVT14", "EVT15", 43 }; 44 #define mmr_name(off) mmr_names[(off) / 4] 45 46 static unsigned 47 bfin_evt_io_write_buffer (struct hw *me, const void *source, 48 int space, address_word addr, unsigned nr_bytes) 49 { 50 struct bfin_evt *evt = hw_data (me); 51 bu32 mmr_off; 52 bu32 value; 53 54 /* Invalid access mode is higher priority than missing register. */ 55 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true)) 56 return 0; 57 58 value = dv_load_4 (source); 59 mmr_off = addr - evt->base; 60 61 HW_TRACE_WRITE (); 62 63 evt->evt[mmr_off / 4] = value; 64 65 return nr_bytes; 66 } 67 68 static unsigned 69 bfin_evt_io_read_buffer (struct hw *me, void *dest, 70 int space, address_word addr, unsigned nr_bytes) 71 { 72 struct bfin_evt *evt = hw_data (me); 73 bu32 mmr_off; 74 bu32 value; 75 76 /* Invalid access mode is higher priority than missing register. */ 77 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false)) 78 return 0; 79 80 mmr_off = addr - evt->base; 81 82 HW_TRACE_READ (); 83 84 value = evt->evt[mmr_off / 4]; 85 86 dv_store_4 (dest, value); 87 88 return nr_bytes; 89 } 90 91 static void 92 attach_bfin_evt_regs (struct hw *me, struct bfin_evt *evt) 93 { 94 address_word attach_address; 95 int attach_space; 96 unsigned attach_size; 97 reg_property_spec reg; 98 99 if (hw_find_property (me, "reg") == NULL) 100 hw_abort (me, "Missing \"reg\" property"); 101 102 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 103 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 104 105 hw_unit_address_to_attach_address (hw_parent (me), 106 ®.address, 107 &attach_space, &attach_address, me); 108 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 109 110 if (attach_size != BFIN_COREMMR_EVT_SIZE) 111 hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_EVT_SIZE); 112 113 hw_attach_address (hw_parent (me), 114 0, attach_space, attach_address, attach_size, me); 115 116 evt->base = attach_address; 117 } 118 119 static void 120 bfin_evt_finish (struct hw *me) 121 { 122 struct bfin_evt *evt; 123 124 evt = HW_ZALLOC (me, struct bfin_evt); 125 126 set_hw_data (me, evt); 127 set_hw_io_read_buffer (me, bfin_evt_io_read_buffer); 128 set_hw_io_write_buffer (me, bfin_evt_io_write_buffer); 129 130 attach_bfin_evt_regs (me, evt); 131 } 132 133 const struct hw_descriptor dv_bfin_evt_descriptor[] = 134 { 135 {"bfin_evt", bfin_evt_finish,}, 136 {NULL, NULL}, 137 }; 138 139 #define EVT_STATE(cpu) DV_STATE_CACHED (cpu, evt) 140 141 void 142 cec_set_evt (SIM_CPU *cpu, int ivg, bu32 handler_addr) 143 { 144 if (ivg > IVG15 || ivg < 0) 145 sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg); 146 147 EVT_STATE (cpu)->evt[ivg] = handler_addr; 148 } 149 150 bu32 151 cec_get_evt (SIM_CPU *cpu, int ivg) 152 { 153 if (ivg > IVG15 || ivg < 0) 154 sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg); 155 156 return EVT_STATE (cpu)->evt[ivg]; 157 } 158 159 bu32 160 cec_get_reset_evt (SIM_CPU *cpu) 161 { 162 /* XXX: This should tail into the model to get via BMODE pins. */ 163 return 0xef000000; 164 } 165