Sistema l'errore da me commesso in fase di conversione...

[bertos.git] / kern / switch_dsp56k.c

diff --git a/kern/switch_dsp56k.c b/kern/switch_dsp56k.c
old mode 100755 (executable)
new mode 100644 (file)
index e10216c..60f6fd2
--- a/kern/switch_dsp56k.c
+++ b/kern/switch_dsp56k.c
@@ -1,7 +1,9 @@
-/*!
+/**
  * \file
+ * <!--
  * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
- * All Rights Reserved.
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
  *
  * \version $Id$
  *
@@ -10,42 +12,36 @@
  * \brief DSP5680x task switching support
  */
 
-/*
- * $Log$
- * 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
@@ -73,15 +69,18 @@ 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
@@ -99,38 +98,13 @@ 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;
 }