1 /* Blackfin Watchpoint (WP) model.
3 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
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.
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.
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/>. */
25 #include "dv-bfin_wp.h"
27 /* XXX: This is mostly a stub. */
29 #define WPI_NUM 6 /* 6 instruction watchpoints. */
30 #define WPD_NUM 2 /* 2 data watchpoints. */
36 /* Order after here is important -- matches hardware MMR layout. */
40 bu32 _pad1[16 - WPI_NUM];
42 bu32 _pad2[32 - WPI_NUM];
47 bu32 _pad4[16 - WPD_NUM];
49 bu32 _pad5[32 - WPD_NUM];
53 #define mmr_base() offsetof(struct bfin_wp, iactl)
54 #define mmr_offset(mmr) (offsetof(struct bfin_wp, mmr) - mmr_base())
55 #define mmr_idx(mmr) (mmr_offset (mmr) / 4)
57 static const char * const mmr_names[] =
59 [mmr_idx (iactl)] = "WPIACTL",
60 [mmr_idx (ia)] = "WPIA0", "WPIA1", "WPIA2", "WPIA3", "WPIA4", "WPIA5",
61 [mmr_idx (iacnt)] = "WPIACNT0", "WPIACNT1", "WPIACNT2",
62 "WPIACNT3", "WPIACNT4", "WPIACNT5",
63 [mmr_idx (dactl)] = "WPDACTL",
64 [mmr_idx (da)] = "WPDA0", "WPDA1", "WPDA2", "WPDA3", "WPDA4", "WPDA5",
65 [mmr_idx (dacnt)] = "WPDACNT0", "WPDACNT1", "WPDACNT2",
66 "WPDACNT3", "WPDACNT4", "WPDACNT5",
67 [mmr_idx (stat)] = "WPSTAT",
69 #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
72 bfin_wp_io_write_buffer (struct hw *me, const void *source, int space,
73 address_word addr, unsigned nr_bytes)
75 struct bfin_wp *wp = hw_data (me);
80 value = dv_load_4 (source);
81 mmr_off = addr - wp->base;
82 valuep = (void *)((unsigned long)wp + mmr_base() + mmr_off);
88 case mmr_offset(iactl):
89 case mmr_offset(ia[0]) ... mmr_offset(ia[WPI_NUM - 1]):
90 case mmr_offset(iacnt[0]) ... mmr_offset(iacnt[WPI_NUM - 1]):
91 case mmr_offset(dactl):
92 case mmr_offset(da[0]) ... mmr_offset(da[WPD_NUM - 1]):
93 case mmr_offset(dacnt[0]) ... mmr_offset(dacnt[WPD_NUM - 1]):
96 case mmr_offset(stat):
97 /* Yes, the hardware is this dumb -- clear all bits on any write. */
101 dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
109 bfin_wp_io_read_buffer (struct hw *me, void *dest, int space,
110 address_word addr, unsigned nr_bytes)
112 struct bfin_wp *wp = hw_data (me);
117 mmr_off = addr - wp->base;
118 valuep = (void *)((unsigned long)wp + mmr_base() + mmr_off);
124 case mmr_offset(iactl):
125 case mmr_offset(ia[0]) ... mmr_offset(ia[WPI_NUM - 1]):
126 case mmr_offset(iacnt[0]) ... mmr_offset(iacnt[WPI_NUM - 1]):
127 case mmr_offset(dactl):
128 case mmr_offset(da[0]) ... mmr_offset(da[WPD_NUM - 1]):
129 case mmr_offset(dacnt[0]) ... mmr_offset(dacnt[WPD_NUM - 1]):
130 case mmr_offset(stat):
134 while (1) /* Core MMRs -> exception -> doesn't return. */
135 dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
139 dv_store_4 (dest, value);
145 attach_bfin_wp_regs (struct hw *me, struct bfin_wp *wp)
147 address_word attach_address;
149 unsigned attach_size;
150 reg_property_spec reg;
152 if (hw_find_property (me, "reg") == NULL)
153 hw_abort (me, "Missing \"reg\" property");
155 if (!hw_find_reg_array_property (me, "reg", 0, ®))
156 hw_abort (me, "\"reg\" property must contain three addr/size entries");
158 hw_unit_address_to_attach_address (hw_parent (me),
160 &attach_space, &attach_address, me);
161 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
163 if (attach_size != BFIN_COREMMR_WP_SIZE)
164 hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_WP_SIZE);
166 hw_attach_address (hw_parent (me),
167 0, attach_space, attach_address, attach_size, me);
169 wp->base = attach_address;
173 bfin_wp_finish (struct hw *me)
177 wp = HW_ZALLOC (me, struct bfin_wp);
179 set_hw_data (me, wp);
180 set_hw_io_read_buffer (me, bfin_wp_io_read_buffer);
181 set_hw_io_write_buffer (me, bfin_wp_io_write_buffer);
183 attach_bfin_wp_regs (me, wp);
186 const struct hw_descriptor dv_bfin_wp_descriptor[] =
188 {"bfin_wp", bfin_wp_finish,},