|
0
|
1 //========================================================================== |
|
|
2 // |
|
|
3 // watchdog/mn10300.cxx |
|
|
4 // |
|
|
5 // Watchdog implementation for MN10300 |
|
|
6 // |
|
|
7 //========================================================================== |
|
|
8 //####COPYRIGHTBEGIN#### |
|
|
9 // |
|
|
10 // ------------------------------------------- |
|
|
11 // The contents of this file are subject to the Cygnus eCos Public License |
|
|
12 // Version 1.0 (the "License"); you may not use this file except in |
|
|
13 // compliance with the License. You may obtain a copy of the License at |
|
|
14 // http://sourceware.cygnus.com/ecos |
|
|
15 // |
|
|
16 // Software distributed under the License is distributed on an "AS IS" |
|
|
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
|
|
18 // License for the specific language governing rights and limitations under |
|
|
19 // the License. |
|
|
20 // |
|
|
21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
|
|
22 // September 30, 1998. |
|
|
23 // |
|
|
24 // The Initial Developer of the Original Code is Cygnus. Portions created |
|
|
25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
|
|
26 // ------------------------------------------- |
|
|
27 // |
|
|
28 //####COPYRIGHTEND#### |
|
|
29 //========================================================================== |
|
|
30 //#####DESCRIPTIONBEGIN#### |
|
|
31 // |
|
|
32 // Author(s): nickg |
|
|
33 // Contributors: nickg |
|
|
34 // Date: 1998-07-29 |
|
|
35 // Purpose: Watchdog class implementation |
|
|
36 // Description: Contains an implementation of the Watchdog class for use |
|
|
37 // with the MN10300 hardware watchdog timer. |
|
|
38 // |
|
|
39 //####DESCRIPTIONEND#### |
|
|
40 // |
|
|
41 //========================================================================== |
|
|
42 |
|
|
43 #include <pkgconf/system.h> // system configuration file |
|
|
44 #include <pkgconf/watchdog.h> // configuration for this package |
|
|
45 |
|
|
46 #if defined(CYG_HAL_MN10300_MN103002) && !defined(CYGIMP_WATCHDOG_EMULATE) |
|
|
47 |
|
|
48 #include <cyg/kernel/ktypes.h> // base kernel types |
|
|
49 #include <cyg/infra/cyg_trac.h> // tracing macros |
|
|
50 #include <cyg/infra/cyg_ass.h> // assertion macros |
|
|
51 #include <cyg/kernel/instrmnt.h> // instrumentation |
|
|
52 |
|
|
53 #include <cyg/hal/hal_io.h> // IO register access |
|
|
54 |
|
|
55 #include <cyg/kernel/sched.hxx> // scheduler |
|
|
56 #include <cyg/kernel/intr.hxx> // interrupts |
|
|
57 |
|
|
58 #include <cyg/kernel/sched.inl> // scheduler inlines |
|
|
59 |
|
|
60 #include <cyg/devs/watchdog.hxx> // my header |
|
|
61 |
|
|
62 // ------------------------------------------------------------------------- |
|
|
63 // MN10300 watchdog timer registers |
|
|
64 |
|
|
65 #define WATCHDOG_BASE 0x34004000 |
|
|
66 #define WATCHDOG_COUNTER (WATCHDOG_BASE) |
|
|
67 #define WATCHDOG_CONTROL (WATCHDOG_BASE+2) |
|
|
68 #define WATCHDOG_RESET (WATCHDOG_BASE+4) |
|
|
69 |
|
|
70 #define WATCHDOG_WDCK0 0x07 |
|
|
71 #define WATCHDOG_WDCK0_DEFAULT 0x04 // 1016.801ms cycle |
|
|
72 #define WATCHDOG_WDRST 0x40 |
|
|
73 #define WATCHDOG_WDCNE 0x80 |
|
|
74 |
|
|
75 // ------------------------------------------------------------------------- |
|
|
76 // Forward definitions |
|
|
77 |
|
|
78 static cyg_ISR watchdog_isr; |
|
|
79 static cyg_DSR watchdog_dsr; |
|
|
80 |
|
|
81 // ------------------------------------------------------------------------- |
|
|
82 // Statics |
|
|
83 |
|
|
84 // A static pointer to the single system defined watchdog device. |
|
|
85 Cyg_Watchdog Cyg_Watchdog::watchdog; |
|
|
86 |
|
|
87 // Interrupt object |
|
|
88 static Cyg_Interrupt interrupt( |
|
|
89 CYG_VECTOR_WATCHDOG, |
|
|
90 0, |
|
|
91 0, |
|
|
92 watchdog_isr, |
|
|
93 watchdog_dsr |
|
|
94 ); |
|
|
95 |
|
|
96 // ------------------------------------------------------------------------- |
|
|
97 // Constructor |
|
|
98 |
|
|
99 Cyg_Watchdog::Cyg_Watchdog() |
|
|
100 { |
|
|
101 CYG_REPORT_FUNCTION(); |
|
|
102 |
|
|
103 action_list = 0; |
|
|
104 |
|
|
105 CYG_REPORT_RETURN(); |
|
|
106 } |
|
|
107 |
|
|
108 // ------------------------------------------------------------------------- |
|
|
109 // Start the watchdog running. |
|
|
110 |
|
|
111 void Cyg_Watchdog::start() |
|
|
112 { |
|
|
113 CYG_REPORT_FUNCTION(); |
|
|
114 |
|
|
115 interrupt.attach(); |
|
|
116 |
|
|
117 HAL_WRITE_UINT8( WATCHDOG_COUNTER, 0 ); |
|
|
118 |
|
|
119 // Set overflow cycle |
|
|
120 // Enable and reset counter |
|
|
121 HAL_WRITE_UINT8( WATCHDOG_CONTROL, |
|
|
122 WATCHDOG_WDCK0_DEFAULT|WATCHDOG_WDCNE|WATCHDOG_WDRST); |
|
|
123 |
|
|
124 CYG_REPORT_RETURN(); |
|
|
125 } |
|
|
126 |
|
|
127 // ------------------------------------------------------------------------- |
|
|
128 // Reset watchdog timer. This needs to be called regularly to prevent |
|
|
129 // the watchdog firing. |
|
|
130 |
|
|
131 void Cyg_Watchdog::reset() |
|
|
132 { |
|
|
133 CYG_REPORT_FUNCTION(); |
|
|
134 |
|
|
135 cyg_uint8 ctrl; |
|
|
136 |
|
|
137 HAL_READ_UINT8( WATCHDOG_CONTROL, ctrl ); |
|
|
138 |
|
|
139 ctrl |= WATCHDOG_WDRST; |
|
|
140 |
|
|
141 HAL_WRITE_UINT8( WATCHDOG_CONTROL, ctrl ); |
|
|
142 |
|
|
143 CYG_REPORT_RETURN(); |
|
|
144 } |
|
|
145 |
|
|
146 // ------------------------------------------------------------------------- |
|
|
147 // Trigger the watchdog as if the timer had expired. |
|
|
148 |
|
|
149 void Cyg_Watchdog::trigger() |
|
|
150 { |
|
|
151 CYG_REPORT_FUNCTION(); |
|
|
152 |
|
|
153 Cyg_Scheduler::lock(); |
|
|
154 |
|
|
155 // Disable interrupt just in case |
|
|
156 interrupt.detach(); |
|
|
157 |
|
|
158 Cyg_Watchdog_Action *act = action_list; |
|
|
159 |
|
|
160 while( 0 != act ) |
|
|
161 { |
|
|
162 act->action( act->data ); |
|
|
163 |
|
|
164 act = act->next; |
|
|
165 } |
|
|
166 |
|
|
167 Cyg_Scheduler::unlock(); |
|
|
168 |
|
|
169 CYG_REPORT_RETURN(); |
|
|
170 } |
|
|
171 |
|
|
172 // ------------------------------------------------------------------------- |
|
|
173 // Register an action routine that will be called when the timer |
|
|
174 // triggers. |
|
|
175 |
|
|
176 void Cyg_Watchdog::install_action( Cyg_Watchdog_Action *action ) |
|
|
177 { |
|
|
178 CYG_REPORT_FUNCTION(); |
|
|
179 |
|
|
180 Cyg_Scheduler::lock(); |
|
|
181 |
|
|
182 action->next = action_list; |
|
|
183 action_list = action; |
|
|
184 |
|
|
185 Cyg_Scheduler::unlock(); |
|
|
186 |
|
|
187 CYG_REPORT_RETURN(); |
|
|
188 } |
|
|
189 |
|
|
190 // ------------------------------------------------------------------------- |
|
|
191 // Deregister a previously registered action routine. |
|
|
192 |
|
|
193 void Cyg_Watchdog::uninstall_action( Cyg_Watchdog_Action *action ) |
|
|
194 { |
|
|
195 CYG_REPORT_FUNCTION(); |
|
|
196 |
|
|
197 Cyg_Scheduler::lock(); |
|
|
198 |
|
|
199 Cyg_Watchdog_Action **act_ptr = &action_list; |
|
|
200 |
|
|
201 while( 0 != *act_ptr ) |
|
|
202 { |
|
|
203 Cyg_Watchdog_Action *a = *act_ptr; |
|
|
204 |
|
|
205 if( a == action ) |
|
|
206 { |
|
|
207 *act_ptr = a->next; |
|
|
208 break; |
|
|
209 } |
|
|
210 act_ptr = &a->next; |
|
|
211 } |
|
|
212 |
|
|
213 Cyg_Scheduler::unlock(); |
|
|
214 |
|
|
215 CYG_REPORT_RETURN(); |
|
|
216 } |
|
|
217 |
|
|
218 // ------------------------------------------------------------------------- |
|
|
219 // ISR and DSR |
|
|
220 |
|
|
221 cyg_uint32 watchdog_isr( cyg_vector vector, CYG_ADDRWORD data) |
|
|
222 { |
|
|
223 CYG_REPORT_FUNCTION(); |
|
|
224 |
|
|
225 Cyg_Watchdog::watchdog.trigger(); |
|
|
226 |
|
|
227 CYG_REPORT_RETURN(); |
|
|
228 |
|
|
229 return 0; |
|
|
230 } |
|
|
231 |
|
|
232 void watchdog_dsr(cyg_vector vector, cyg_ucount32 count, CYG_ADDRWORD data) |
|
|
233 { |
|
|
234 } |
|
|
235 |
|
|
236 #endif // defined(CYG_HAL_MN10300_MN103002) && !defined(CYGIMP_WATCHDOG_EMULATE) |
|
|
237 // ------------------------------------------------------------------------- |
|
|
238 // EOF watchdog/mn10300.cxx |
