1 /* Target-dependent code for the Fujitsu SPARCLITE for GDB, the GNU debugger.
2 Copyright 1994 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include "breakpoint.h"
24 #define DDA2_SUP_ASI 0xb000000
25 #define DDA1_SUP_ASI 0xb0000
27 #define DDA2_ASI_MASK 0xff000000
28 #define DDA1_ASI_MASK 0xff0000
29 #define DIA2_SUP_MODE 0x8000
30 #define DIA1_SUP_MODE 0x4000
31 #define DDA2_ENABLE 0x100
32 #define DDA1_ENABLE 0x80
33 #define DIA2_ENABLE 0x40
34 #define DIA1_ENABLE 0x20
35 #define DSINGLE_STEP 0x10
36 #define DDV_TYPE_MASK 0xc
37 #define DDV_TYPE_LOAD 0x0
38 #define DDV_TYPE_STORE 0x4
39 #define DDV_TYPE_ACCESS 0x8
40 #define DDV_TYPE_ALWAYS 0xc
45 sparclite_insert_watchpoint(addr, len, type)
52 dcr = read_register (DCR_REGNUM);
54 if (!(dcr & DDA1_ENABLE))
56 write_register (DDA1_REGNUM, addr);
57 dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
58 dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
61 write_register (DDV1_REGNUM, 0);
62 write_register (DDV2_REGNUM, 0xffffffff);
63 dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
67 write_register (DDV1_REGNUM, 0);
68 write_register (DDV2_REGNUM, 0xffffffff);
69 dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
73 write_register (DDV1_REGNUM, 0);
74 write_register (DDV2_REGNUM, 0xffffffff);
75 dcr |= (DDV_TYPE_ACCESS);
77 write_register (DCR_REGNUM, dcr);
79 else if (!(dcr & DDA2_ENABLE))
81 write_register (DDA2_REGNUM, addr);
82 dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
83 dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
86 write_register (DDV1_REGNUM, 0);
87 write_register (DDV2_REGNUM, 0xffffffff);
88 dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
92 write_register (DDV1_REGNUM, 0);
93 write_register (DDV2_REGNUM, 0xffffffff);
94 dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
98 write_register (DDV1_REGNUM, 0);
99 write_register (DDV2_REGNUM, 0xffffffff);
100 dcr |= (DDV_TYPE_ACCESS);
102 write_register (DCR_REGNUM, dcr);
111 sparclite_remove_watchpoint(addr, len, type)
116 CORE_ADDR dcr, dda1, dda2;
118 dcr = read_register (DCR_REGNUM);
119 dda1 = read_register (DDA1_REGNUM);
120 dda2 = read_register (DDA2_REGNUM);
122 if ((dcr & DDA1_ENABLE) && addr == dda1) {
123 write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
125 else if ((dcr & DDA2_ENABLE) && addr == dda2) {
126 write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
135 sparclite_insert_hw_breakpoint(addr, len)
141 dcr = read_register (DCR_REGNUM);
143 if (!(dcr & DIA1_ENABLE)) {
144 write_register (DIA1_REGNUM, addr);
145 write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
147 else if (!(dcr & DIA2_ENABLE)) {
148 write_register (DIA2_REGNUM, addr);
149 write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
158 sparclite_remove_hw_breakpoint(addr, shadow)
162 CORE_ADDR dcr, dia1, dia2;
164 dcr = read_register (DCR_REGNUM);
165 dia1 = read_register (DIA1_REGNUM);
166 dia2 = read_register (DIA2_REGNUM);
168 if ((dcr & DIA1_ENABLE) && addr == dia1) {
169 write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
171 else if ((dcr & DIA2_ENABLE) && addr == dia2) {
172 write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
181 sparclite_check_watch_resources(type, cnt, ot)
186 if (type == bp_hardware_breakpoint) {
187 if (TARGET_HW_BREAK_LIMIT == 0) return 0;
188 else if (cnt <= TARGET_HW_BREAK_LIMIT) return 1;
191 if (TARGET_HW_WATCH_LIMIT == 0) return 0;
192 else if (ot) return -1;
193 else if (cnt <= TARGET_HW_WATCH_LIMIT) return 1;
199 sparclite_stopped_data_address()
201 CORE_ADDR dsr, dda1, dda2;
203 dsr = read_register (DSR_REGNUM);
204 dda1 = read_register (DDA1_REGNUM);
205 dda2 = read_register (DDA2_REGNUM);
207 if (dsr & 0x10) return dda1;
208 else if (dsr & 0x20) return dda2;