Changeset fd537a0 in mainline

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

Location:

arch/ia64

Files:

• include/mm/frame.h (modified) (1 diff)
• include/mm/page.h (modified) (5 diffs)
• src/mm/page.c (modified) (1 diff)

arch/ia64/include/mm/frame.h

@@ -30 +30 @@
 #define __ia64_FRAME_H__
 
-#define FRAME_SIZE              (16*1024)
+#define FRAME_WIDTH   14
+#define FRAME_SIZE              (1<<FRAME_WIDTH)
 
 extern void frame_arch_init(void);

arch/ia64/include/mm/page.h

@@ -34 +34 @@
 
 #define PAGE_SIZE       FRAME_SIZE
+#define PAGE_WIDTH      FRAME_WIDTH
 
 #define KA2PA(x)        ((__address) (x))
@@ -48 +49 @@
 #define HT_SET_NEXT_ARCH(t, s)
 #define HT_SET_RECORD_ARCH(t, page, asid, frame, flags)
+
+#define REGION_RID_MAIN 0
+#define REGION_RID_FIRST_INVALID 16
+#define REGION_REGISTERS 8
+
+#define VHPT_WIDTH 16         /*64kB*/
+#define VHPT_SIZE (1<<VHPT_WIDTH)
+
+#define VHPT_BASE 0           /* Must be aligned to VHPT_SIZE */
 
 struct VHPT_tag_info
@@ -87 +97 @@
                             /* But I'm almost sure we nead access to whole word so there are both possibilities*/
         /* Word 3 */                                                                                                    
-        unsigned long long next :64;
+        unsigned long long next :64; /* This ignored field will be (in my hopes ;-) ) used as pointer in link list of entries with same hash value*/
         
 }__attribute__ ((packed));
@@ -108 +118 @@
                             /* But I'm almost sure we nead access to whole word so there are both possibilities*/
         /* Word 3 */                                                                                                    
-        unsigned long long next :64;
+        unsigned long long next :64; /* This ignored field will be (in my hopes ;-) ) used as pointer in link list of entries with same hash value*/
         
 }__attribute__ ((packed));
@@ -120 +130 @@
 extern void page_arch_init(void);
 
+
+struct region_register_map
+{
+  unsigned ve            : 1;
+        unsigned r0            : 1;
+        unsigned ps            : 6;
+        unsigned rid           :24;
+        unsigned r1            :32;
+}__attribute__ ((packed));
+
+
+typedef union region_register
+{
+        struct region_register_map   map;
+        unsigned long long           word;
+}region_register;
+
+struct PTA_register_map
+{
+  unsigned ve            : 1;
+        unsigned r0            : 1;
+        unsigned size          : 6;
+        unsigned vf            : 1;
+        unsigned r1            : 6;
+        unsigned long long base:49;
+}__attribute__ ((packed));
+
+
+typedef union PTA_register
+{
+        struct PTA_register_map   map;
+        unsigned long long        word;
+}PTA_register;
+
+
 #endif

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();
 }