1 /* Blackfin Performance Monitor 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_pfmon.h" 26 27 /* XXX: This is mostly a stub. */ 28 29 struct bfin_pfmon 30 { 31 bu32 base; 32 33 /* Order after here is important -- matches hardware MMR layout. */ 34 bu32 ctl; 35 bu32 _pad0[63]; 36 bu32 cntr0, cntr1; 37 }; 38 #define mmr_base() offsetof(struct bfin_pfmon, ctl) 39 #define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base()) 40 41 static const char * const mmr_names[] = 42 { 43 "PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1", 44 }; 45 #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>") 46 47 static unsigned 48 bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space, 49 address_word addr, unsigned nr_bytes) 50 { 51 struct bfin_pfmon *pfmon = hw_data (me); 52 bu32 mmr_off; 53 bu32 value; 54 bu32 *valuep; 55 56 value = dv_load_4 (source); 57 mmr_off = addr - pfmon->base; 58 valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off); 59 60 HW_TRACE_WRITE (); 61 62 switch (mmr_off) 63 { 64 case mmr_offset(ctl): 65 case mmr_offset(cntr0): 66 case mmr_offset(cntr1): 67 *valuep = value; 68 break; 69 default: 70 dv_bfin_mmr_invalid (me, addr, nr_bytes, true); 71 break; 72 } 73 74 return nr_bytes; 75 } 76 77 static unsigned 78 bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space, 79 address_word addr, unsigned nr_bytes) 80 { 81 struct bfin_pfmon *pfmon = hw_data (me); 82 bu32 mmr_off; 83 bu32 value; 84 bu32 *valuep; 85 86 mmr_off = addr - pfmon->base; 87 valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off); 88 89 HW_TRACE_READ (); 90 91 switch (mmr_off) 92 { 93 case mmr_offset(ctl): 94 case mmr_offset(cntr0): 95 case mmr_offset(cntr1): 96 value = *valuep; 97 break; 98 default: 99 while (1) /* Core MMRs -> exception -> doesn't return. */ 100 dv_bfin_mmr_invalid (me, addr, nr_bytes, false); 101 break; 102 } 103 104 dv_store_4 (dest, value); 105 106 return nr_bytes; 107 } 108 109 static void 110 attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon) 111 { 112 address_word attach_address; 113 int attach_space; 114 unsigned attach_size; 115 reg_property_spec reg; 116 117 if (hw_find_property (me, "reg") == NULL) 118 hw_abort (me, "Missing \"reg\" property"); 119 120 if (!hw_find_reg_array_property (me, "reg", 0, ®)) 121 hw_abort (me, "\"reg\" property must contain three addr/size entries"); 122 123 hw_unit_address_to_attach_address (hw_parent (me), 124 ®.address, 125 &attach_space, &attach_address, me); 126 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); 127 128 if (attach_size != BFIN_COREMMR_PFMON_SIZE) 129 hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE); 130 131 hw_attach_address (hw_parent (me), 132 0, attach_space, attach_address, attach_size, me); 133 134 pfmon->base = attach_address; 135 } 136 137 static void 138 bfin_pfmon_finish (struct hw *me) 139 { 140 struct bfin_pfmon *pfmon; 141 142 pfmon = HW_ZALLOC (me, struct bfin_pfmon); 143 144 set_hw_data (me, pfmon); 145 set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer); 146 set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer); 147 148 attach_bfin_pfmon_regs (me, pfmon); 149 } 150 151 const struct hw_descriptor dv_bfin_pfmon_descriptor[] = 152 { 153 {"bfin_pfmon", bfin_pfmon_finish,}, 154 {NULL, NULL}, 155 }; 156