Changeset 97f1691 in mainline for arch/sparc64/src/mm/tlb.c

Timestamp:

2006-02-28T00:02:39Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

7d6ec87

Parents:

d87c3f3

Message:

sparc64 work.
Fix KBD_VIRT_ADDRESS.
Call before_thread_runs() prior to the switch to the thread's stack. Add comment why this is crucial.
Add after_thread_ran() to the scheduler.
Add before_thread_runs_arch() and after_thread_ran_arch() for sparc64, mapping/demapping thread's kernel stack.
Add dummy after_thread_ran_arch() to all other architectures.
Add dtlb_insert_mapping() to promote code reuse.

File:

• arch/sparc64/src/mm/tlb.c (modified) (5 diffs)

arch/sparc64/src/mm/tlb.c

@@ -110 +110 @@
         dmmu_enable();
         immu_enable();
-        
-        /*
-         * Quick hack: map frame buffer
-         */
-        fr.address = FB_PHYS_ADDRESS;
-        pg.address = FB_VIRT_ADDRESS;
+}
+
+/** Insert privileged mapping into DMMU TLB.
+ *
+ * @param page Virtual page address.
+ * @param frame Physical frame address.
+ * @param pagesize Page size.
+ * @param locked True for permanent mappings, false otherwise.
+ * @param cacheable True if the mapping is cacheable, false otherwise.
+ */
+void dtlb_insert_mapping(__address page, __address frame, int pagesize, bool locked, bool cacheable)
+{
+        tlb_tag_access_reg_t tag;
+        tlb_data_t data;
+        page_address_t pg;
+        frame_address_t fr;
+
+        pg.address = page;
+        fr.address = frame;
 
         tag.value = ASID_KERNEL;
@@ -124 +137 @@
         data.value = 0;
         data.v = true;
-        data.size = PAGESIZE_4M;
+        data.size = pagesize;
         data.pfn = fr.pfn;
-        data.l = true;
-        data.cp = 0;
-        data.cv = 0;
+        data.l = locked;
+        data.cp = cacheable;
+        data.cv = cacheable;
         data.p = true;
         data.w = true;
@@ -134 +147 @@
 
         dtlb_data_in_write(data.value);
-        
-        /*
-         * Quick hack: map keyboard
-         */
-        fr.address = KBD_PHYS_ADDRESS;
-        pg.address = KBD_VIRT_ADDRESS;
-
-        tag.value = ASID_KERNEL;
-        tag.vpn = pg.vpn;
-
-        dtlb_tag_access_write(tag.value);
-
-        data.value = 0;
-        data.v = true;
-        data.size = PAGESIZE_8K;
-        data.pfn = fr.pfn;
-        data.l = true;
-        data.cp = 0;
-        data.cv = 0;
-        data.p = true;
-        data.w = true;
-        data.g = true;
-
-        dtlb_data_in_write(data.value);
 }
 
@@ -170 +159 @@
 {
         tlb_tag_access_reg_t tag;
-        tlb_data_t data;
         __address tpc;
         char *tpc_str;
@@ -187 +175 @@
          * Identity map piece of faulting kernel address space.
          */
-        data.value = 0;
-        data.v = true;
-        data.size = PAGESIZE_8K;
-        data.pfn = tag.vpn;
-        data.l = false;
-        data.cp = 1;
-        data.cv = 1;
-        data.p = true;
-        data.w = true;
-        data.g = true;
-
-        dtlb_data_in_write(data.value);
+        dtlb_insert_mapping(tag.vpn * PAGE_SIZE, tag.vpn * FRAME_SIZE, PAGESIZE_8K, false, true);
 }