X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=kern%2Fswitch_dsp56k.c;h=41a12056679482af0324e3dbc5fe0fa63361020f;hb=4654a69f5df97af36ee5456d20cbccdc19012dc2;hp=51a380f47d21e6f691f0571d12abbb6219e05b46;hpb=96f0ef786b54356c56cc3d4e4f0838df2505cfcc;p=bertos.git

diff --git a/kern/switch_dsp56k.c b/kern/switch_dsp56k.c
old mode 100755
new mode 100644
index 51a380f4..41a12056
--- a/kern/switch_dsp56k.c
+++ b/kern/switch_dsp56k.c
@@ -1,8 +1,33 @@
-/*!
+/**
  * \file
  * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
  * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See devlib/README for information.
+ *
  * -->
  *
  * \version $Id$
@@ -12,45 +37,36 @@
  * \brief DSP5680x task switching support
  */
 
-/*
- * $Log$
- * Revision 1.2  2004/06/03 11:27:09  bernie
- * Add dual-license information.
- *
- * Revision 1.1  2004/05/23 17:27:00  bernie
- * Import kern/ subdirectory.
- *
- */
+/*#*
+ *#* $Log$
+ *#* Revision 1.7  2006/07/19 12:56:27  bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.6  2006/02/24 01:17:05  bernie
+ *#* Update for new emulator.
+ *#*
+ *#* Revision 1.5  2005/11/04 16:20:02  bernie
+ *#* Fix reference to README.devlib in header.
+ *#*
+ *#* Revision 1.4  2004/08/25 14:12:09  rasky
+ *#* Aggiornato il comment block dei log RCS
+ *#*
+ *#* Revision 1.3  2004/07/30 14:24:16  rasky
+ *#* Task switching con salvataggio perfetto stato di interrupt (SR)
+ *#* Kernel monitor per dump informazioni su stack dei processi
+ *#*
+ *#* Revision 1.2  2004/06/03 11:27:09  bernie
+ *#* Add dual-license information.
+ *#*
+ *#* Revision 1.1  2004/05/23 17:27:00  bernie
+ *#* Import kern/ subdirectory.
+ *#*
+ *#*/
 
 void asm_switch_context(void ** new_sp/*R2*/, void ** save_sp/*R3*/);
 asm void asm_switch_context(void ** new_sp, void ** save_sp)
 {
 	lea   (SP)+
-	move  n,x:(SP)+
-	move  x0,x:(SP)+
-	move  y0,x:(SP)+
-	move  y1,x:(SP)+
-	move  a0,x:(SP)+
-	move  a1,x:(SP)+
-	move  a2,x:(SP)+
-	move  b0,x:(SP)+
-	move  b1,x:(SP)+
-	move  b2,x:(SP)+
-	move  r0,x:(SP)+
-	move  r1,x:(SP)+
-	move  r2,x:(SP)+
-	move  r3,x:(SP)+
-
-	move  omr,x:(SP)+
-	move  la,x:(SP)+
-	move  m01,x:(SP)+
-	move  lc,x:(SP)+
-
-	;
-	; save hardware stack
-	;
-	move  hws,x:(SP)+
-	move  hws,x:(SP)+
 
 	; From the manual:
 	; The compiler uses page 0 address locations X: 0x0030 - 0x003F as register
@@ -78,15 +94,18 @@ asm void asm_switch_context(void ** new_sp, void ** save_sp)
 	move  y1,x:(SP)+
 	move  x:<$3F,y1
 	move  y1,x:(SP)
-	
-	; 
-	; 28 words have been pushed on the stack.
+
+	;
+	; Switch stacks
 	nop
 	move SP, x:(R3)
 	nop
 	move x:(R2), SP
 	nop
 
+	;
+	; restore all saved registers
+	;
 	pop   y1
 	move  y1,x:<$3F
 	pop   y1
@@ -104,38 +123,13 @@ asm void asm_switch_context(void ** new_sp, void ** save_sp)
 	pop   y1
 	move  y1,x:<$38
 
-	;
-	; restore hardware stack
-	;
-	move  hws,la  ; Clear HWS to ensure proper reload
-	move  hws,la
-	pop   HWS
-	pop   HWS
-	
-	;
-	; restore all saved registers
-	;
-	pop   lc
-	pop   m01
-	pop   la
-	pop   omr
-
-	pop   r3
-	pop   r2
-	pop   r1
-	pop   r0
-	pop   b2
-	pop   b1
-	pop   b0
-	pop   a2
-	pop   a1
-	pop   a0
-
-	pop   y1
-	pop   y0
-	pop   x0
+	; SR is already pushed on the stack (normal call context). Use RTI to restore
+	; it, so that interrupt status is preserved across the tasks.
+	rti
+}
 
-	pop   n
-	
-	rts
+int asm_switch_version(void);
+int asm_switch_version(void)
+{
+	return 1;
 }