Changeset fd537a0 in mainline for arch/ia64/src/mm/page.c

Timestamp:

2006-01-15T18:05:11Z (19 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ae10582

Parents:

4be51c8

Message:

VHPT setup to be able to use ttag and thash instructions

File:

• arch/ia64/src/mm/page.c (modified) (1 diff)

arch/ia64/src/mm/page.c

@@ -33 +33 @@
 #include <panic.h>
 
+
+static void set_VHPT_environment(void)
+{
+        /*
+        TODO:
+        */
+        
+        int i;
+        
+        /* First set up REGION REGISTER 0 */
+        
+        region_register rr;
+        rr.map.ve=0;                  /*Disable Walker*/
+        rr.map.ps=PAGE_WIDTH;
+        rr.map.rid=REGION_RID_MAIN;
+        
+        asm
+        (
+                "mov rr[r0]=%0;;"
+                :
+                :"r"(rr.word)
+        );
+                
+        /* And Invalidate the rest of REGION REGISTERS */
+        
+        for(i=1;i<REGION_REGISTERS;i++)
+        {
+                rr.map.rid=REGION_RID_FIRST_INVALID+i-1;
+                asm
+                (
+                        "mov r8=%1;;"
+                        "mov rr[r8]=%0;;"
+                        :
+                        :"r"(rr.word),"r"(i)
+                        :"r8"
+                );
+        };
+
+        PTA_register pta;
+        pta.map.ve=0;                   /*Disable Walker*/
+        pta.map.vf=1;                   /*Large entry format*/
+        pta.map.size=VHPT_WIDTH;
+        pta.map.base=VHPT_BASE;
+        
+        
+        /*Write PTA*/
+        asm
+        (
+                "mov cr8=%0;;"
+                :
+                :"r"(pta.word)
+        );      
+        
+}       
+
+
 void page_arch_init(void)
 {
         page_operations = &page_ht_operations;
+        set_VHPT_environment();
 }