Changeset 406 for trunk/hal/tsar_mips32/core/hal_switch.S

Timestamp:

Aug 29, 2017, 12:03:37 PM (7 years ago)

Author:

alain

Message:

This version executed successfully the user "init" process on a mono-processor TSAR architecture.

File:

• trunk/hal/tsar_mips32/core/hal_switch.S (modified) (3 diffs)

trunk/hal/tsar_mips32/core/hal_switch.S

@@ -30 +30 @@
 #---------------------------------------------------------------------------------
 
-    .section   .text , "ax" , @progbits
+    .section   .switch , "ax" , @progbits
 
-    .ent   hal_do_switch
-    .globl hal_do_switch
+    .ent     hal_do_switch
+    .global  hal_do_switch
 
-    .set   noat 
-    .set   noreorder 
+    .set     noat 
+    .set     noreorder 
 
 hal_do_switch:
@@ -84 +84 @@
     sw      $31,  31*4($26)         
 
+    mfc0    $27,  $12               
+        sw      $27,  34*4($26)           /* save c0_sr to slot 34 */
+    mfc0    $27,  $4, 2             
+        sw      $27,  35*4($26)           /* save c0_th to slot 35 */
+
         mfc2    $27,  $0                
         sw      $27,  32*4($26)           /* save c2_ptpr to slot 32 */
         mfc2    $27,  $1                
         sw      $27,  33*4($26)           /* save c2_mode to slot 33 */
-
-    mfc0    $27,  $12               
-        sw      $27,  34*4($26)           /* save c0_sr to slot 34 */
-    mfc0    $27,  $4, 2             
-        sw      $27,  35*4($26)           /* save c0_th to slot 35 */
 
     sync                            
@@ -140 +140 @@
         lw      $31,  31*4($26)         
 
-        lw      $27,  32*4($26)         
+        lw      $27,  32*4($26)            /* $27 <= c2_ptpr */
         mtc2    $27,  $0                   /* restore c2_ptpr from slot 32 */
-        lw      $27,  33*4($26)         
+
+        lw      $27,  35*4($26)            /* $27 <= c0_th */      
+    mtc0        $27,  $4, 2                /* restore c0_th from slot 35 */
+
+        lw      $27,  33*4($26)            /* $27 <= c2_mode */
+        lw      $26,  34*4($26)            /* $26 <= c0_sr */
+
         mtc2    $27,  $1                   /* restore c2_mode from slot 33 */
-
-        lw      $27,  34*4($26)         
-    mtc0        $27,  $12                  /* restore c0_sr from slot 34 */
-        lw      $27,  35*4($26)         
-    mtc0        $27,  $4, 2                /* restore co_th from slot 35 */
+    mtc0        $26,  $12                  /* restore c0_sr from slot 34 */
 
     jr      $31                        /* return to caller */