WebSVN – HelenOS-historic – Diff – //kernel/trunk/arch/ia64/src/mm/page.c

 #include <panic.h>
 #include <arch/asm.h>
 #include <arch/barrier.h>
 #include <memstr.h>
-static void set_vhpt_environment(void);
+static void set_environment(void);
 /** Initialize ia64 virtual address translation subsystem. */
 void page_arch_init(void)
+{
     page_operations = &page_ht_operations;
     pk_disable();
-    set_vhpt_environment();
+    set_environment();
+}
 /** Initialize VHPT and region registers. */
-void set_vhpt_environment(void)
+void set_environment(void)
+{
     region_register rr;
     pta_register pta;
     int i;
         srlz_i();
         srlz_d();
+    }
     /*
-     * Allocate VHPT and invalidate all its entries.
-     */
-    page_ht = (pte_t *) frame_alloc(VHPT_WIDTH - FRAME_WIDTH, FRAME_KA);
-    memsetb((__address) page_ht, VHPT_SIZE, 0);
-    ht_invalidate_all();
-    /*
      * Set up PTA register.
      */
     pta.word = pta_read();
     pta.map.ve = 0;                   /* disable VHPT walker */
     pta.map.vf = 1;                   /* large entry format */
     pta.map.size = VHPT_WIDTH;
-    pta.map.base = ((__address) page_ht) >> PTA_BASE_SHIFT;
+    pta.map.base = VHPT_BASE >> PTA_BASE_SHIFT;
     pta_write(pta.word);
     srlz_i();
     srlz_d();
+}
  * Interrupts must be disabled.
+ *
  * @param page Address of virtual page including VRN bits.
  * @param asid Address space identifier.
+ *
- * @return Head of VHPT collision chain for page and asid.
+ * @return VHPT entry address.
  */
-pte_t *vhpt_hash(__address page, asid_t asid)
+vhpt_entry_t *vhpt_hash(__address page, asid_t asid)
+{
     region_register rr_save, rr;
     index_t vrn;
     rid_t rid;
-    pte_t *t;
+    vhpt_entry_t *v;
     vrn = page >> VRN_SHIFT;
     rid = ASID2RID(asid, vrn);
     rr_save.word = rr_read(vrn);
     if (rr_save.map.rid == rid) {
         /*
          * The RID is already in place, compute thash and return.
          */
-        t = (pte_t *) thash(page);
+        v = (vhpt_entry_t *) thash(page);
-        return t;
+        return v;
+    }
     /*
      * The RID must be written to some region register.
      * To speed things up, register indexed by vrn is used.
      */
     rr.word = rr_save.word;
     rr.map.rid = rid;
     rr_write(vrn, rr.word);
     srlz_i();
-    t = (pte_t *) thash(page);
+    v = (vhpt_entry_t *) thash(page);
     rr_write(vrn, rr_save.word);
     srlz_i();
     srlz_d();
-    return t;
+    return v;
+}
 /** Compare ASID and VPN against PTE.
+ *
  * Interrupts must be disabled.
  * @param page Address of virtual page including VRN bits.
  * @param asid Address space identifier.
+ *
  * @return True if page and asid match the page and asid of t, false otherwise.
  */
-bool vhpt_compare(__address page, asid_t asid, pte_t *t)
+bool vhpt_compare(__address page, asid_t asid, vhpt_entry_t *v)
+{
     region_register rr_save, rr;
     index_t vrn;
     rid_t rid;
     bool match;
-    ASSERT(t);
+    ASSERT(v);
     vrn = page >> VRN_SHIFT;
     rid = ASID2RID(asid, vrn);
     rr_save.word = rr_read(vrn);
     if (rr_save.map.rid == rid) {
         /*
          * The RID is already in place, compare ttag with t and return.
          */
-        return ttag(page) == t->present.tag.tag_word;
+        return ttag(page) == v->present.tag.tag_word;
+    }
     /*
      * The RID must be written to some region register.
      * To speed things up, register indexed by vrn is used.
      */
     rr.word = rr_save.word;
     rr.map.rid = rid;
     rr_write(vrn, rr.word);
     srlz_i();
-    match = (ttag(page) == t->present.tag.tag_word);
+    match = (ttag(page) == v->present.tag.tag_word);
     rr_write(vrn, rr_save.word);
     srlz_i();
     srlz_d();
     return match;
  * @param page Virtual address of the page mapped by the entry.
  * @param asid Address space identifier of the address space to which page belongs.
  * @param frame Physical address of the frame to wich page is mapped.
  * @param flags Different flags for the mapping.
  */
-void vhpt_set_record(pte_t *t, __address page, asid_t asid, __address frame, int flags)
+void vhpt_set_record(vhpt_entry_t *v, __address page, asid_t asid, __address frame, int flags)
+{
     region_register rr_save, rr;
     index_t vrn;
     rid_t rid;
     __u64 tag;
-    ASSERT(t);
+    ASSERT(v);
     vrn = page >> VRN_SHIFT;
     rid = ASID2RID(asid, vrn);
     /*
     srlz_d();
     /*
      * Clear the entry.
      */
-    t->word[0] = 0;
+    v->word[0] = 0;
-    t->word[1] = 0;
+    v->word[1] = 0;
-    t->word[2] = 0;
+    v->word[2] = 0;
-    t->word[3] = 0;
+    v->word[3] = 0;
-    t->present.p = true;
+    v->present.p = true;
-    t->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE;
+    v->present.ma = (flags & PAGE_CACHEABLE) ? MA_WRITEBACK : MA_UNCACHEABLE;
-    t->present.a = false;   /* not accessed */
+    v->present.a = false;   /* not accessed */
-    t->present.d = false;   /* not dirty */
+    v->present.d = false;   /* not dirty */
-    t->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;
+    v->present.pl = (flags & PAGE_USER) ? PL_USER : PL_KERNEL;
-    t->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;
+    v->present.ar = (flags & PAGE_WRITE) ? AR_WRITE : AR_READ;
-    t->present.ar |= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;
+    v->present.ar |= (flags & PAGE_EXEC) ? AR_EXECUTE : 0;
-    t->present.ppn = frame >> PPN_SHIFT;
+    v->present.ppn = frame >> PPN_SHIFT;
-    t->present.ed = false;  /* exception not deffered */
+    v->present.ed = false;  /* exception not deffered */
-    t->present.ps = PAGE_WIDTH;
+    v->present.ps = PAGE_WIDTH;
-    t->present.key = 0;
+    v->present.key = 0;
-    t->present.tag.tag_word = tag;
+    v->present.tag.tag_word = tag;
-    t->present.next = NULL;
+}

Subversion Repositories HelenOS-historic

(root)//kernel/trunk/arch/ia64/src/mm/page.c – Rev 786 → 792