1/* Blackfin Performance Monitor model. 2 3 Copyright (C) 2010-2023 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_pfmon.h" 27 28/* XXX: This is mostly a stub. */ 29 30struct bfin_pfmon 31{ 32 bu32 base; 33 34 /* Order after here is important -- matches hardware MMR layout. */ 35 bu32 ctl; 36 bu32 _pad0[63]; 37 bu32 cntr0, cntr1; 38}; 39#define mmr_base() offsetof(struct bfin_pfmon, ctl) 40#define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base()) 41 42static const char * const mmr_names[] = 43{ 44 "PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1", 45}; 46#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>") 47 48static unsigned 49bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space, 50 address_word addr, unsigned nr_bytes) 51{ 52 struct bfin_pfmon *pfmon = hw_data (me); 53 bu32 mmr_off; 54 bu32 value; 55 bu32 *valuep; 56 57 /* Invalid access mode is higher priority than missing register. */ 58 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true)) 59 return 0; 60 61 value = dv_load_4 (source); 62 mmr_off = addr - pfmon->base; 63 valuep = (void *)((uintptr_t)pfmon + mmr_base() + mmr_off); 64 65 HW_TRACE_WRITE (); 66 67 switch (mmr_off) 68 { 69 case mmr_offset(ctl): 70 case mmr_offset(cntr0): 71 case mmr_offset(cntr1): 72 *valuep = value; 73 break; 74 default: 75 dv_bfin_mmr_invalid (me, addr, nr_bytes, true); 76 return 0; 77 } 78 79 return nr_bytes; 80} 81 82static unsigned 83bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space, 84 address_word addr, unsigned nr_bytes) 85{ 86 struct bfin_pfmon *pfmon = hw_data (me); 87 bu32 mmr_off; 88 bu32 value; 89 bu32 *valuep; 90 91 /* Invalid access mode is higher priority than missing register. */ 92 if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false)) 93 return 0; 94 95 mmr_off = addr - pfmon->base; 96 valuep = (void *)((uintptr_t)pfmon + mmr_base() + mmr_off); 97 98 HW_TRACE_READ (); 99 100 switch (mmr_off) 101 { 102 case mmr_offset(ctl): 103 case mmr_offset(cntr0): 104 case mmr_offset(cntr1): 105 value = *valuep; 106 break; 107 default: 108 dv_bfin_mmr_invalid (me, addr, nr_bytes, false); 109 return 0; 110 } 111 112 dv_store_4 (dest, value); 113 114 return nr_bytes; 115} 116 117static void 118attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon) 119{ 120 address_word attach_address; 121 int attach_space; 122 unsigned attach_size; 123 reg_property_spec reg; 124 125 if (hw_find_property (me, "reg") == NULL) 126 hw_abort (me, "Missing \"reg\" property"); 127 128 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 129 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 130 131 hw_unit_address_to_attach_address (hw_parent (me), 132 ®.address, 133 &attach_space, &attach_address, me); 134 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 135 136 if (attach_size != BFIN_COREMMR_PFMON_SIZE) 137 hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE); 138 139 hw_attach_address (hw_parent (me), 140 0, attach_space, attach_address, attach_size, me); 141 142 pfmon->base = attach_address; 143} 144 145static void 146bfin_pfmon_finish (struct hw *me) 147{ 148 struct bfin_pfmon *pfmon; 149 150 pfmon = HW_ZALLOC (me, struct bfin_pfmon); 151 152 set_hw_data (me, pfmon); 153 set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer); 154 set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer); 155 156 attach_bfin_pfmon_regs (me, pfmon); 157} 158 159const struct hw_descriptor dv_bfin_pfmon_descriptor[] = 160{ 161 {"bfin_pfmon", bfin_pfmon_finish,}, 162 {NULL, NULL}, 163}; 164