1 /* Blackfin Event Vector Table (EVT) model. 2 3 Copyright (C) 2010-2014 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 #include "config.h" 22 23 #include "sim-main.h" 24 #include "devices.h" 25 #include "dv-bfin_cec.h" 26 #include "dv-bfin_evt.h" 27 28 struct bfin_evt 29 { 30 bu32 base; 31 32 /* Order after here is important -- matches hardware MMR layout. */ 33 bu32 evt[16]; 34 }; 35 #define mmr_base() offsetof(struct bfin_evt, evt[0]) 36 #define mmr_offset(mmr) (offsetof(struct bfin_evt, mmr) - mmr_base()) 37 38 static const char * const mmr_names[] = 39 { 40 "EVT0", "EVT1", "EVT2", "EVT3", "EVT4", "EVT5", "EVT6", "EVT7", "EVT8", 41 "EVT9", "EVT10", "EVT11", "EVT12", "EVT13", "EVT14", "EVT15", 42 }; 43 #define mmr_name(off) mmr_names[(off) / 4] 44 45 static unsigned 46 bfin_evt_io_write_buffer (struct hw *me, const void *source, 47 int space, address_word addr, unsigned nr_bytes) 48 { 49 struct bfin_evt *evt = hw_data (me); 50 bu32 mmr_off; 51 bu32 value; 52 53 value = dv_load_4 (source); 54 mmr_off = addr - evt->base; 55 56 HW_TRACE_WRITE (); 57 58 evt->evt[mmr_off / 4] = value; 59 60 return nr_bytes; 61 } 62 63 static unsigned 64 bfin_evt_io_read_buffer (struct hw *me, void *dest, 65 int space, address_word addr, unsigned nr_bytes) 66 { 67 struct bfin_evt *evt = hw_data (me); 68 bu32 mmr_off; 69 bu32 value; 70 71 mmr_off = addr - evt->base; 72 73 HW_TRACE_READ (); 74 75 value = evt->evt[mmr_off / 4]; 76 77 dv_store_4 (dest, value); 78 79 return nr_bytes; 80 } 81 82 static void 83 attach_bfin_evt_regs (struct hw *me, struct bfin_evt *evt) 84 { 85 address_word attach_address; 86 int attach_space; 87 unsigned attach_size; 88 reg_property_spec reg; 89 90 if (hw_find_property (me, "reg") == NULL) 91 hw_abort (me, "Missing \"reg\" property"); 92 93 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 94 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 95 96 hw_unit_address_to_attach_address (hw_parent (me), 97 ®.address, 98 &attach_space, &attach_address, me); 99 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 100 101 if (attach_size != BFIN_COREMMR_EVT_SIZE) 102 hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_EVT_SIZE); 103 104 hw_attach_address (hw_parent (me), 105 0, attach_space, attach_address, attach_size, me); 106 107 evt->base = attach_address; 108 } 109 110 static void 111 bfin_evt_finish (struct hw *me) 112 { 113 struct bfin_evt *evt; 114 115 evt = HW_ZALLOC (me, struct bfin_evt); 116 117 set_hw_data (me, evt); 118 set_hw_io_read_buffer (me, bfin_evt_io_read_buffer); 119 set_hw_io_write_buffer (me, bfin_evt_io_write_buffer); 120 121 attach_bfin_evt_regs (me, evt); 122 } 123 124 const struct hw_descriptor dv_bfin_evt_descriptor[] = 125 { 126 {"bfin_evt", bfin_evt_finish,}, 127 {NULL, NULL}, 128 }; 129 130 #define EVT_STATE(cpu) DV_STATE_CACHED (cpu, evt) 131 132 void 133 cec_set_evt (SIM_CPU *cpu, int ivg, bu32 handler_addr) 134 { 135 if (ivg > IVG15 || ivg < 0) 136 sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg); 137 138 EVT_STATE (cpu)->evt[ivg] = handler_addr; 139 } 140 141 bu32 142 cec_get_evt (SIM_CPU *cpu, int ivg) 143 { 144 if (ivg > IVG15 || ivg < 0) 145 sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg); 146 147 return EVT_STATE (cpu)->evt[ivg]; 148 } 149 150 bu32 151 cec_get_reset_evt (SIM_CPU *cpu) 152 { 153 /* XXX: This should tail into the model to get via BMODE pins. */ 154 return 0xef000000; 155 } 156