Mercurial > flash_v2

annotate packages/hal/powerpc/arch/current/src/ppc_stub.c @ 1777:c16341b1bac6 default tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
* Added execute permissions to files missed in conversion from CVS
author alexs
date Mon, 12 Oct 2009 02:26:09 +0100
parents 9c818dd5d9fa
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
1 //========================================================================
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
2 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
3 // ppc_stub.c
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
4 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
5 // Helper functions for stub, generic to all PowerPC processors
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
6 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
7 //========================================================================
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
8 //####ECOSGPLCOPYRIGHTBEGIN####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
9 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
10 // This file is part of eCos, the Embedded Configurable Operating System.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
12 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
13 // eCos is free software; you can redistribute it and/or modify it under
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
14 // the terms of the GNU General Public License as published by the Free
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
15 // Software Foundation; either version 2 or (at your option) any later version.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
16 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
20 // for more details.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
21 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
22 // You should have received a copy of the GNU General Public License along
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
25 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
26 // As a special exception, if other files instantiate templates or use macros
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
27 // or inline functions from this file, or you compile this file and link it
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
28 // with other works to produce a work based on this file, this file does not
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
29 // by itself cause the resulting work to be covered by the GNU General Public
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
30 // License. However the source code for this file must still be made available
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
31 // in accordance with section (3) of the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
32 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
33 // This exception does not invalidate any other reasons why a work based on
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
34 // this file might be covered by the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
35 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
210
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST
jlarmour
parents: 208
diff changeset
37 // at http://sources.redhat.com/ecos/ecos-license/
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
38 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
39 //####ECOSGPLCOPYRIGHTEND####
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
40 //========================================================================
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
41 //#####DESCRIPTIONBEGIN####
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
42 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
43 // Author(s): Red Hat, jskov
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
44 // Contributors: Red Hat, jskov, gthomas
64
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
45 // Date: 1998-08-20
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
46 // Purpose:
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
47 // Description: Helper functions for stub, generic to all PowerPC processors
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
48 // Usage:
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
49 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
50 //####DESCRIPTIONEND####
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
51 //
c38311975d4f Merge from eCos master repository on 2000-01-28-04:28:11-GMT
jlarmour
parents: 30
diff changeset
52 //========================================================================
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
53
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
54 #include <stddef.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
55
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
56 #include <pkgconf/hal.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
57
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
58 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
59
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
60 #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
61 #include <cyg/hal/ppc_regs.h>
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
62
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
63 #include <cyg/hal/hal_stub.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
64 #include <cyg/hal/hal_arch.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
65 #include <cyg/hal/hal_intr.h>
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
66
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
67 #ifdef CYGNUM_HAL_NO_VECTOR_TRACE
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
68 #define USE_BREAKPOINTS_FOR_SINGLE_STEP
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
69 #endif
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
70
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
71 #ifdef CYGDBG_HAL_DEBUG_GDB_THREAD_SUPPORT
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
72 #include <cyg/hal/dbg-threads-api.h> // dbg_currthread_id
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
73 #endif
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
74
1397
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
75 #ifndef OFFSETOF
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
76 #define OFFSETOF(_struct_, _member_) (int)((char *)(&(((_struct_*)0)->_member_))-(char *)((_struct_*)0))
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
77 #endif
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
78
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
79 /* Given a trap value TRAP, return the corresponding signal. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
80
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
81 int __computeSignal (unsigned int trap_number)
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
82 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
83 switch (trap_number)
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
84 {
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
85 case CYGNUM_HAL_VECTOR_MACHINE_CHECK:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
86 /* Machine check */
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
87 case CYGNUM_HAL_VECTOR_DSI:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
88 /* Data access */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
89 return SIGSEGV;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
90
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
91 case CYGNUM_HAL_VECTOR_ISI:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
92 /* Instruction access (Ifetch) */
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
93 case CYGNUM_HAL_VECTOR_ALIGNMENT:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
94 /* Data access */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
95 return SIGBUS;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
96
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
97 case CYGNUM_HAL_VECTOR_INTERRUPT:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
98 /* External interrupt */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
99 return SIGINT;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
100
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
101 case CYGNUM_HAL_VECTOR_TRACE:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
102 /* Instruction trace */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
103 return SIGTRAP;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
104
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
105 case CYGNUM_HAL_VECTOR_PROGRAM:
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
106 #ifdef CYGPKG_HAL_POWERPC_PPC40x
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
107 // The 40x is b0rken, returning 0 for these bits. Translate to
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
108 // SIGTRAP to allow thread debugging.
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
109 return SIGTRAP;
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
110 #else
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
111 // The register PS contains the value of SRR1 at the time of
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
112 // exception entry. Bits 11-15 contain information about the
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
113 // cause of the exception. Bits 16-31 the PS (MSR) state.
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
114 #ifdef USE_BREAKPOINTS_FOR_SINGLE_STEP
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
115 if (__is_single_step(get_register(PC))) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
116 return SIGTRAP;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
117 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
118 #endif
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
119 switch ((get_register (PS) >> 17) & 0xf){
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
120 case 1: /* trap */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
121 return SIGTRAP;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
122 case 2: /* privileged instruction */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
123 case 4: /* illegal instruction */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
124 return SIGILL;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
125 case 8: /* floating point */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
126 return SIGFPE;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
127 default: /* should never happen! */
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
128 return SIGILL;
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
129 }
151
25e238959bae Merge from eCos master repository on 2001-02-12-23:44:24-GMT
jlarmour
parents: 149
diff changeset
130 #endif
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
131
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
132 case CYGNUM_HAL_VECTOR_RESERVED_A:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
133 case CYGNUM_HAL_VECTOR_RESERVED_B:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
134 return SIGILL;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
135
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
136 case CYGNUM_HAL_VECTOR_FP_UNAVAILABLE:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
137 /* FPU disabled */
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
138 case CYGNUM_HAL_VECTOR_FP_ASSIST:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
139 /* FPU assist */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
140 return SIGFPE;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
141
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
142 case CYGNUM_HAL_VECTOR_DECREMENTER:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
143 /* Decrementer alarm */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
144 return SIGALRM;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
145
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
146 case CYGNUM_HAL_VECTOR_SYSTEM_CALL:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
147 /* System call */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
148 return SIGSYS;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
149
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
150 #if defined(CYGPKG_HAL_POWERPC_MPC8xx) || defined(CYGPKG_HAL_POWERPC_MPC5xx)
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
151 case CYGNUM_HAL_VECTOR_SW_EMUL:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
152 /* A SW_EMUL is generated instead of PROGRAM for illegal
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
153 instructions. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
154 return SIGILL;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
155
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
156 case CYGNUM_HAL_VECTOR_DATA_BP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
157 case CYGNUM_HAL_VECTOR_INSTRUCTION_BP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
158 case CYGNUM_HAL_VECTOR_PERIPHERAL_BP:
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
159 case CYGNUM_HAL_VECTOR_NMI:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
160 /* Developer port debugging exceptions. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
161 return SIGTRAP;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
162
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
163 #if defined(CYGNUM_HAL_VECTOR_ITLB_MISS)
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
164 case CYGNUM_HAL_VECTOR_ITLB_MISS:
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
165 /* Software reload of TLB required. */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
166 return SIGTRAP;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
167 #endif
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
168 #if defined(CYGNUM_HAL_VECTOR_DTLB_MISS)
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
169 case CYGNUM_HAL_VECTOR_DTLB_MISS:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
170 /* Software reload of TLB required. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
171 return SIGTRAP;
208
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST
jlarmour
parents: 151
diff changeset
172 #endif
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
173 case CYGNUM_HAL_VECTOR_ITLB_ERROR:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
174 /* Invalid instruction access. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
175 return SIGBUS;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
176
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
177 case CYGNUM_HAL_VECTOR_DTLB_ERROR:
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
178 /* Invalid data access. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
179 return SIGSEGV;
68
f74b2666b30d Merge from eCos master repository on 2000-02-04-07:47:04-GMT
jlarmour
parents: 66
diff changeset
180 #endif // defined(CYGPKG_HAL_POWERPC_MPC8xx)
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
181
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
182 default:
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
183 return SIGTERM;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
184 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
185 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
186
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
187
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
188 /* Return the trap number corresponding to the last-taken trap. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
189
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
190 int __get_trap_number (void)
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
191 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
192 // The vector is not not part of the GDB register set so get it
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
193 // directly from the save context.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
194 return _hal_registers->vector >> 8;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
195 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
196
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
197 /* Set the currently-saved pc register value to PC. This also updates NPC
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
198 as needed. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
199
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
200 void set_pc (target_register_t pc)
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
201 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
202 put_register (PC, pc);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
203 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
204
1397
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
205 #ifdef CYGHWR_HAL_POWERPC_FPU
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
206 static int
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
207 reg_offset(regnames_t reg)
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
208 {
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
209 // We let the compiler determine the offsets in order to avoid all
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
210 // possible alignment problems
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
211 int base_offset;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
212 // 32 general purpose registers
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
213 if(reg < F0) return reg * 4;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
214
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
215 // first sixteen floating point regs
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
216 base_offset = OFFSETOF(GDB_Registers, f0);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
217 if(reg < F16) return base_offset + ((reg - F0) * 8);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
218
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
219 // last sixteen floating point regs
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
220 base_offset = OFFSETOF(GDB_Registers, f16);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
221 if(reg < PC) return base_offset + ((reg - F16) * 8);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
222
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
223 // Other 32 bit regs
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
224 if(reg < PS) return(OFFSETOF(GDB_Registers, pc));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
225 if(reg < CND) return(OFFSETOF(GDB_Registers, msr));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
226 if(reg < LR) return(OFFSETOF(GDB_Registers, cr));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
227 if(reg < CNT) return(OFFSETOF(GDB_Registers, lr));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
228 if(reg < XER) return(OFFSETOF(GDB_Registers, ctr));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
229 if(reg < MQ) return(OFFSETOF(GDB_Registers, xer));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
230
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
231 return OFFSETOF(GDB_Registers, mq);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
232 }
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
233
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
234 // Return the currently-saved value corresponding to register REG of
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
235 // the exception context.
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
236 target_register_t
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
237 get_register (regnames_t reg)
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
238 {
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
239 target_register_t val;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
240 int offset = reg_offset(reg);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
241
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
242 if (REGSIZE(reg) > sizeof(target_register_t))
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
243 return -1;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
244
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
245 val = _registers[offset/sizeof(target_register_t)];
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
246
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
247 return val;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
248 }
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
249
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
250 // Store VALUE in the register corresponding to WHICH in the exception
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
251 // context.
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
252 void
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
253 put_register (regnames_t which, target_register_t value)
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
254 {
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
255 int offset = reg_offset(which);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
256
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
257 if (REGSIZE(which) > sizeof(target_register_t))
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
258 return;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
259
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
260 _registers[offset/sizeof(target_register_t)] = value;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
261 }
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
262
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
263 // Write the contents of register WHICH into VALUE as raw bytes. This
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
264 // is only used for registers larger than sizeof(target_register_t).
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
265 // Return non-zero if it is a valid register.
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
266 int
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
267 get_register_as_bytes (regnames_t which, char *value)
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
268 {
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
269 int offset = reg_offset(which);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
270
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
271 memcpy (value, (char *)_registers + offset, REGSIZE(which));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
272 return 1;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
273 }
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
274
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
275 // Alter the contents of saved register WHICH to contain VALUE. This
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
276 // is only used for registers larger than sizeof(target_register_t).
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
277 // Return non-zero if it is a valid register.
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
278 int
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
279 put_register_as_bytes (regnames_t which, char *value)
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
280 {
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
281 int offset = reg_offset(which);
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
282
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
283 memcpy ((char *)_registers + offset, value, REGSIZE(which));
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
284 return 1;
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
285 }
9c818dd5d9fa Updates for EC555 targets - from Bob Koninckx
gthomas
parents: 210
diff changeset
286 #endif
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
287
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
288 /*----------------------------------------------------------------------
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
289 * Single-step support
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
290 */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
291
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
292 /* Set things up so that the next user resume will execute one instruction.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
293 This may be done by setting breakpoints or setting a single step flag
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
294 in the saved user registers, for example. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
295
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
296 #ifdef USE_BREAKPOINTS_FOR_SINGLE_STEP
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
297
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
298 #if (HAL_BREAKINST_SIZE == 1)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
299 typedef cyg_uint8 t_inst;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
300 #elif (HAL_BREAKINST_SIZE == 2)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
301 typedef cyg_uint16 t_inst;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
302 #elif (HAL_BREAKINST_SIZE == 4)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
303 typedef cyg_uint32 t_inst;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
304 #else
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
305 #error "Don't know how to handle that size"
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
306 #endif
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
307
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
308 typedef struct
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
309 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
310 t_inst *targetAddr;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
311 t_inst savedInstr;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
312 } instrBuffer;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
313
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
314 static instrBuffer sstep_instr[2];
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
315 static target_register_t irq_state = 0;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
316
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
317 static void
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
318 __insert_break(int indx, target_register_t pc)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
319 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
320 sstep_instr[indx].targetAddr = (t_inst *)pc;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
321 sstep_instr[indx].savedInstr = *(t_inst *)pc;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
322 *(t_inst*)pc = (t_inst)HAL_BREAKINST;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
323 __data_cache(CACHE_FLUSH);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
324 __instruction_cache(CACHE_FLUSH);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
325 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
326
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
327 static void
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
328 __remove_break(int indx)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
329 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
330 if (sstep_instr[indx].targetAddr != 0) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
331 *(sstep_instr[indx].targetAddr) = sstep_instr[indx].savedInstr;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
332 sstep_instr[indx].targetAddr = 0;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
333 __data_cache(CACHE_FLUSH);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
334 __instruction_cache(CACHE_FLUSH);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
335 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
336 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
337
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
338 int
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
339 __is_single_step(target_register_t pc)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
340 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
341 return (sstep_instr[0].targetAddr == pc) ||
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
342 (sstep_instr[1].targetAddr == pc);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
343 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
344
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
345
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
346 // Compute the target address for this instruction, if the instruction
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
347 // is some sort of branch/flow change.
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
348
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
349 struct xl_form {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
350 unsigned int op : 6;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
351 unsigned int bo : 5;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
352 unsigned int bi : 5;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
353 unsigned int reserved : 5;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
354 unsigned int xo : 10;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
355 unsigned int lk : 1;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
356 };
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
357
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
358 struct i_form {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
359 unsigned int op : 6;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
360 signed int li : 24;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
361 unsigned int aa : 1;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
362 unsigned int lk : 1;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
363 };
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
364
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
365 struct b_form {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
366 unsigned int op : 6;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
367 unsigned int bo : 5;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
368 unsigned int bi : 5;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
369 signed int bd : 14;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
370 unsigned int aa : 1;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
371 unsigned int lk : 1;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
372 };
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
373
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
374 union ppc_insn {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
375 unsigned int word;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
376 struct i_form i;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
377 struct b_form b;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
378 struct xl_form xl;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
379 };
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
380
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
381 static target_register_t
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
382 __branch_pc(target_register_t pc)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
383 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
384 union ppc_insn insn;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
385
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
386 insn.word = *(t_inst *)pc;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
387
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
388 // Decode the instruction to determine the instruction which will follow
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
389 // Note: there are holes in this process, but the important ones work
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
390 switch (insn.i.op) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
391 case 16:
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
392 /* bcx */
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
393 if (insn.b.aa) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
394 return (target_register_t)(insn.b.bd << 2);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
395 } else {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
396 return (target_register_t)((insn.b.bd << 2) + (long)pc);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
397 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
398 case 18:
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
399 /* bx */
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
400 if (insn.i.aa) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
401 return (target_register_t)(insn.i.li << 2);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
402 } else {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
403 return (target_register_t)((insn.i.li << 2) + (long)pc);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
404 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
405 case 19:
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
406 if (insn.xl.reserved == 0) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
407 if (insn.xl.xo == 528) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
408 /* bcctrx */
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
409 return (target_register_t)(get_register(CNT) & ~3);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
410 } else if (insn.xl.xo == 16) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
411 /* bclrx */
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
412 return (target_register_t)(get_register(LR) & ~3);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
413 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
414 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
415 break;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
416 default:
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
417 break;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
418 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
419 return (pc+4);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
420 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
421
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
422 void __single_step(void)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
423 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
424 target_register_t msr = get_register(PS);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
425 target_register_t pc = get_register(PC);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
426 target_register_t next_pc = __branch_pc(pc);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
427
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
428 // Disable interrupts.
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
429 irq_state = msr & MSR_EE;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
430 msr &= ~MSR_EE;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
431 put_register (PS, msr);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
432
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
433 // Set a breakpoint at the next instruction
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
434 __insert_break(0, pc+4);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
435 if (next_pc != (pc+4)) {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
436 __insert_break(1, next_pc);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
437 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
438 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
439
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
440 /* Clear the single-step state. */
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
441
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
442 void __clear_single_step(void)
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
443 {
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
444 target_register_t msr = get_register (PS);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
445
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
446 // Restore interrupt state.
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
447 // FIXME: Should check whether the executed instruction changed the
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
448 // interrupt state - or single-stepping a MSR changing instruction
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
449 // may result in a wrong EE. Not a very likely scenario though.
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
450 msr |= irq_state;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
451
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
452 // This function is called much more than its counterpart
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
453 // __single_step. Only re-enable interrupts if they where
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
454 // disabled during the previous cal to __single_step. Otherwise,
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
455 // this function only makes "extra sure" that no trace or branch
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
456 // exception will happen.
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
457 irq_state = 0;
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
458
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
459 put_register (PS, msr);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
460
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
461 // Remove breakpoints
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
462 __remove_break(0);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
463 __remove_break(1);
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
464 }
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
465
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
466 #else
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
467
30
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
468 static target_register_t irq_state = 0;
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
469
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
470 void __single_step (void)
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
471 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
472 target_register_t msr = get_register (PS);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
473
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
474 // Set single-step flag in the exception context.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
475 msr |= (MSR_SE | MSR_BE);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
476 // Disable interrupts.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
477 irq_state = msr & MSR_EE;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
478 msr &= ~MSR_EE;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
479
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
480 put_register (PS, msr);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
481 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
482
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
483 /* Clear the single-step state. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
484
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
485 void __clear_single_step (void)
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
486 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
487 target_register_t msr = get_register (PS);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
488
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
489 // Clear single-step flag in the exception context.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
490 msr &= ~(MSR_SE | MSR_BE);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
491 // Restore interrupt state.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
492 // FIXME: Should check whether the executed instruction changed the
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
493 // interrupt state - or single-stepping a MSR changing instruction
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
494 // may result in a wrong EE. Not a very likely scenario though.
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
495 msr |= irq_state;
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
496
30
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
497 // This function is called much more than its counterpart
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
498 // __single_step. Only re-enable interrupts if they where
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
499 // disabled during the previous cal to __single_step. Otherwise,
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
500 // this function only makes "extra sure" that no trace or branch
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
501 // exception will happen.
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
502 irq_state = 0;
641b639be825 Merge from eCos master repository on 1999-08-16-22:01:37-BST
jlarmour
parents: 2
diff changeset
503
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
504 put_register (PS, msr);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
505 }
149
52c99470ec11 Merge from eCos master repository on 2001-01-19-06:43:03-GMT
jlarmour
parents: 115
diff changeset
506 #endif
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
507
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
508 void __install_breakpoints (void)
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
509 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
510 /* NOP since single-step HW exceptions are used instead of
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
511 breakpoints. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
512 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
513
2
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
514 void __clear_breakpoints (void)
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
515 {
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
516 }
443894e2e912 Block commit of eCos version 1.2.1
jlarmour
parents: 0
diff changeset
517
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
518
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
519 /* If the breakpoint we hit is in the breakpoint() instruction, return a
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
520 non-zero value. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
521
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
522 int
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
523 __is_breakpoint_function ()
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
524 {
115
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST
jlarmour
parents: 68
diff changeset
525 return get_register (PC) == (target_register_t)&_breakinst;
0
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
526 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
527
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
528
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
529 /* Skip the current instruction. Since this is only called by the
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
530 stub when the PC points to a breakpoint or trap instruction,
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
531 we can safely just skip 4. */
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
532
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
533 void __skipinst (void)
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
534 {
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
535 put_register (PC, get_register (PC) + 4);
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
536 }
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
537
3111d98ba7b3 Initial commit of eCos version 1.1
jlarmour
parents:
diff changeset
538 #endif // CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS