Changeset a0d74fd in mainline for arch/ia64/include/mm/tlb.h

Timestamp:

2006-03-01T11:07:04Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

9ad03fe

Parents:

2c49fbbe

Message:

ia64 work.
Provide PA2KA(identity) mapping for kernel data references via Alternate Data TLB Fault handler.
Add before_thread_runs_arch() that maps kstack, if necessary.
Add easy to use dtlb_mapping_insert() for comfortable insertion of kernel data mappings.

File:

• arch/ia64/include/mm/tlb.h (modified) (1 diff)

arch/ia64/include/mm/tlb.h

@@ -39 +39 @@
 #include <typedefs.h>
 
-extern void tc_mapping_insert(__address va, asid_t asid, vhpt_entry_t entry, bool dtc);
-extern void dtc_mapping_insert(__address va, asid_t asid, vhpt_entry_t entry);
-extern void itc_mapping_insert(__address va, asid_t asid, vhpt_entry_t entry);
+/** Data and instruction Translation Register indices. */
+#define DTR_KERNEL      0
+#define ITR_KERNEL      0
+#define DTR_KSTACK      1
+
+/** Portion of TLB insertion format data structure. */
+union tlb_entry {
+        __u64 word[2];
+        struct {
+                /* Word 0 */
+                unsigned p : 1;                 /**< Present. */
+                unsigned : 1;
+                unsigned ma : 3;                /**< Memory attribute. */
+                unsigned a : 1;                 /**< Accessed. */
+                unsigned d : 1;                 /**< Dirty. */
+                unsigned pl : 2;                /**< Privilege level. */
+                unsigned ar : 3;                /**< Access rights. */
+                unsigned long long ppn : 38;    /**< Physical Page Number, a.k.a. PFN. */
+                unsigned : 2;
+                unsigned ed : 1;
+                unsigned ig1 : 11;
+
+                /* Word 1 */
+                unsigned : 2;
+                unsigned ps : 6;                /**< Page size will be 2^ps. */
+                unsigned key : 24;              /**< Protection key, unused. */
+                unsigned : 32;
+        } __attribute__ ((packed));
+} __attribute__ ((packed));
+typedef union tlb_entry tlb_entry_t;
+
+extern void tc_mapping_insert(__address va, asid_t asid, tlb_entry_t entry, bool dtc);
+extern void dtc_mapping_insert(__address va, asid_t asid, tlb_entry_t entry);
+extern void itc_mapping_insert(__address va, asid_t asid, tlb_entry_t entry);
 
 extern void tr_mapping_insert(__address va, asid_t asid, tlb_entry_t entry, bool dtr, index_t tr);
 extern void dtr_mapping_insert(__address va, asid_t asid, tlb_entry_t entry, index_t tr);
 extern void itr_mapping_insert(__address va, asid_t asid, tlb_entry_t entry, index_t tr);
+
+extern void dtlb_mapping_insert(__address page, __address frame, bool dtr, index_t tr);
 
 extern void alternate_instruction_tlb_fault(__u64 vector, struct exception_regdump *pstate);