1 /* Remote debugging interface for DINK32 (PowerPC) ROM monitor for
2    GDB, the GNU debugger.
3    Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
4 
5    This file is part of GDB.
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11 
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16 
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 59 Temple Place - Suite 330,
20    Boston, MA 02111-1307, USA.  */
21 
22 #include "defs.h"
23 #include "gdbcore.h"
24 #include "target.h"
25 #include "monitor.h"
26 #include "serial.h"
27 #include "symfile.h" /* For generic_load() */
28 #include "inferior.h" /* For write_pc() */
29 #include "regcache.h"
30 
31 static void dink32_open (char *args, int from_tty);
32 
33 static void
dink32_supply_register(char * regname,int regnamelen,char * val,int vallen)34 dink32_supply_register (char *regname, int regnamelen, char *val, int vallen)
35 {
36   int regno = 0;
37 
38   if (regnamelen < 2 || regnamelen > 4)
39     return;
40 
41   switch (regname[0])
42     {
43     case 'R':
44       if (regname[1] < '0' || regname[1] > '9')
45 	return;
46       if (regnamelen == 2)
47 	regno = regname[1] - '0';
48       else if (regnamelen == 3 && regname[2] >= '0' && regname[2] <= '9')
49 	regno = (regname[1] - '0') * 10 + (regname[2] - '0');
50       else
51 	return;
52       break;
53     case 'F':
54       if (regname[1] != 'R' || regname[2] < '0' || regname[2] > '9')
55 	return;
56       if (regnamelen == 3)
57 	regno = 32 + regname[2] - '0';
58       else if (regnamelen == 4 && regname[3] >= '0' && regname[3] <= '9')
59 	regno = 32 + (regname[2] - '0') * 10 + (regname[3] - '0');
60       else
61 	return;
62       break;
63     case 'I':
64       if (regnamelen != 2 || regname[1] != 'P')
65 	return;
66       regno = 64;
67       break;
68     case 'M':
69       if (regnamelen != 3 || regname[1] != 'S' || regname[2] != 'R')
70 	return;
71       regno = 65;
72       break;
73     case 'C':
74       if (regnamelen != 2 || regname[1] != 'R')
75 	return;
76       regno = 66;
77       break;
78     case 'S':
79       if (regnamelen != 4 || regname[1] != 'P' || regname[2] != 'R')
80 	return;
81       else if (regname[3] == '8')
82 	regno = 67;
83       else if (regname[3] == '9')
84 	regno = 68;
85       else if (regname[3] == '1')
86 	regno = 69;
87       else if (regname[3] == '0')
88 	regno = 70;
89       else
90 	return;
91       break;
92     default:
93       return;
94     }
95 
96   monitor_supply_register (regno, val);
97 }
98 
99 /* This array of registers needs to match the indexes used by GDB. The
100    whole reason this exists is because the various ROM monitors use
101    different names than GDB does, and don't support all the registers
102    either.  */
103 
104 static char *dink32_regnames[] =
105 {
106   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
107   "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
108   "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
109   "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
110 
111   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
112   "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
113   "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
114   "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
115 
116   "srr0", "msr", "cr", "lr", "ctr", "xer", "xer"
117 };
118 
119 static struct target_ops dink32_ops;
120 
121 static char *dink32_inits[] =
122 {"\r", NULL};
123 
124 static struct monitor_ops dink32_cmds;
125 
126 static void
dink32_open(char * args,int from_tty)127 dink32_open (char *args, int from_tty)
128 {
129   monitor_open (args, &dink32_cmds, from_tty);
130 }
131 
132 extern initialize_file_ftype _initialize_dink32_rom; /* -Wmissing-prototypes */
133 
134 void
_initialize_dink32_rom(void)135 _initialize_dink32_rom (void)
136 {
137   dink32_cmds.flags = MO_HEX_PREFIX | MO_GETMEM_NEEDS_RANGE | MO_FILL_USES_ADDR | MO_HANDLE_NL | MO_32_REGS_PAIRED | MO_SETREG_INTERACTIVE | MO_SETMEM_INTERACTIVE | MO_GETMEM_16_BOUNDARY | MO_CLR_BREAK_1_BASED | MO_SREC_ACK | MO_SREC_ACK_ROTATE;
138   dink32_cmds.init = dink32_inits;
139   dink32_cmds.cont = "go +\r";
140   dink32_cmds.step = "tr +\r";
141   dink32_cmds.set_break = "bp 0x%x\r";
142   dink32_cmds.clr_break = "bp %d\r";
143 #if 0				/* Would need to follow strict alignment rules.. */
144   dink32_cmds.fill = "mf %x %x %x\r";
145 #endif
146   dink32_cmds.setmem.cmdb = "mm -b %x\r";
147   dink32_cmds.setmem.cmdw = "mm -w %x\r";
148   dink32_cmds.setmem.cmdl = "mm %x\r";
149   dink32_cmds.setmem.term = " ?  ";
150   dink32_cmds.getmem.cmdb = "md %x\r";
151   dink32_cmds.getmem.resp_delim = "        ";
152   dink32_cmds.setreg.cmd = "rm %s\r";
153   dink32_cmds.setreg.term = " ?  ";
154   dink32_cmds.getreg.cmd = "rd %s\r";
155   dink32_cmds.getreg.resp_delim = ": ";
156   dink32_cmds.dump_registers = "rd r\r";
157   dink32_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)";
158   dink32_cmds.supply_register = dink32_supply_register;
159   /* S-record download, via "keyboard port".  */
160   dink32_cmds.load = "dl -k\r";
161   dink32_cmds.loadresp = "Set Input Port : set to Keyboard Port\r";
162   dink32_cmds.prompt = "DINK32_603 >>";
163   dink32_cmds.line_term = "\r";
164   dink32_cmds.target = &dink32_ops;
165   dink32_cmds.stopbits = SERIAL_1_STOPBITS;
166   dink32_cmds.regnames = dink32_regnames;
167   dink32_cmds.magic = MONITOR_OPS_MAGIC;
168 
169   init_monitor_ops (&dink32_ops);
170 
171   dink32_ops.to_shortname = "dink32";
172   dink32_ops.to_longname = "DINK32 monitor";
173   dink32_ops.to_doc = "Debug using the DINK32 monitor.\n\
174 Specify the serial device it is connected to (e.g. /dev/ttya).";
175   dink32_ops.to_open = dink32_open;
176 
177   add_target (&dink32_ops);
178 }
179