source: rtems/c/src/lib/libbsp/mips/genmongoosev/startup/gdb-support.c @ 3299388d

4.104.114.84.95
Last change on this file since 3299388d was e00bf285, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 4, 2003 at 6:52:11 PM

2003-09-04 Joel Sherrill <joel@…>

  • clock/clockdrv.c, console/conscfg.c, include/bsp.h, startup/bspstart.c, startup/gdb-support.c, timer/timer.c: URL for license changed.
  • Property mode set to 100644
File size: 3.6 KB
Line 
1/*
2 *  GDB Support Routines for the Mongoose-V
3 *
4 *  COPYRIGHT (c) 1989-2002.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#include <rtems.h>
15#include <rtems/bspIo.h>
16#include <libcpu/mongoose-v.h>
17#include "gdb_if.h"
18
19#include <rtems/libio.h>
20
21#include <stdio.h>
22#include <string.h>
23
24
25/*
26
27We're going to call right down into the uart driver because we're
28operating within an exception.  if things are broken because something
29bad happened, this may be our last chance to debug before RTEMS goes
30mad, so we won't rely on the I/O subsystem to be operating.  This is a
31little messy, but at least we're not talking right to the hardware.
32
33*/
34
35extern int mg5uart_set_attributes(int minor,const struct termios *t);
36extern int mg5uart_open(int major,int minor, void *arg);
37extern int mg5uart_close(int major,int minor, void *arg);
38extern void mg5uart_write_polled(int minor, char c );
39extern int mg5uart_inbyte_nonblocking_polled(int minor);
40
41
42static int debugUartEnabled = 0;
43
44
45
46
47
48int mg5rdbgOpenGDBuart(int breakoninit)
49{
50   struct termios t;
51   memset(&t,0,sizeof(struct termios));
52
53   if( mg5uart_open(0,1,NULL) != RTEMS_SUCCESSFUL )
54   {
55      printf("gdbstub: Failed to open UART port 2\n");
56      return -1;
57   }
58
59   t.c_cflag |= B19200;
60   t.c_cflag |= CS8;
61   if( mg5uart_set_attributes(1,&t) != 0 )
62   {
63      printf("gdbstub: Failed to configure UART 2 for 19200N82\n");
64      return -1;
65   }
66   printf("gdbstub: UART 2 configured for 19200N82\n");
67
68   debugUartEnabled  = -1;
69
70   /* set up vectoring for gdb */
71   mips_gdb_stub_install(-1);
72
73   /*
74      this is a rough approximation of our memory map.  Yours is
75      probably different.  It only needs to be sufficient for the stub
76      to know what it can and can't do and where.
77   */
78   gdbstub_add_memsegment(0         , 0x8001ffff, MEMOPT_READABLE );
79   gdbstub_add_memsegment(0x80020000, 0x80afffff, MEMOPT_READABLE | MEMOPT_WRITEABLE );
80   gdbstub_add_memsegment(0x80b00000, 0x814fffff, MEMOPT_READABLE );
81   gdbstub_add_memsegment(0x81500000, 0x81ffffff, MEMOPT_READABLE | MEMOPT_WRITEABLE );
82
83
84   if( breakoninit ) 
85   {
86      printf("gdbstub: GDB stub entered, connect host debugger now\n");
87      /*
88         break to gdb.  We'll wait there for the operator to get their gdb
89         going, then they can 'continue' or do whatever.
90      */
91      mips_break(0);
92      printf("gdbstub: User code running\n");
93   }
94   else
95      printf("gdbstub: GDB stub ready for exceptions\n");
96
97   return RTEMS_SUCCESSFUL;
98}
99
100
101void mg5rdbgCloseGDBuart(void)
102{
103   mg5uart_close(0,1,NULL);
104   debugUartEnabled  = 0;
105}
106
107
108
109
110char getDebugChar (void)
111{
112   if( debugUartEnabled )
113   {
114      int rv;
115
116      while( (rv = mg5uart_inbyte_nonblocking_polled(1)) < 0 );
117      return (char)rv;
118   }
119
120   return 0;
121}
122
123
124void putDebugChar (char c)
125{
126   if( debugUartEnabled )
127      return mg5uart_write_polled(1,c);
128}
129
130
131
132
133/*
134   {
135      * initialize hardware pc and data breakpoints to quiet state*
136      unsigned32 dcic, reg, mask;
137
138      reg = 0xffffffff;
139      mask = 0xffffffff;
140
141      mips_set_bpcrm( reg, mask );
142      mips_set_bdarm( reg, mask );
143
144      mips_get_dcic( dcic );
145      * configure dcic for trapping, user & kernel mode, PC traps and enable it *
146      dcic = DCIC_TR | DCIC_UD | DCIC_KD | DCIC_PCE | DCIC_DE;
147      * dcic = DCIC_UD | DCIC_KD | DCIC_PCE | DCIC_DE; *
148      mips_set_dcic( dcic );
149
150      mips_get_bpcrm( reg, mask );
151      mips_get_dcic( dcic );
152      * printf("bpc is %08X, bpc_mask is %08X, dcic is now %08X\n", reg, mask, dcic ); *
153   }
154*/
155
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