Changes in kernel/generic/src/mm/page.c [0428f77:235e6c7] in mainline

File:

• kernel/generic/src/mm/page.c (modified) (5 diffs)

kernel/generic/src/mm/page.c

@@ -53 +53 @@
  * We assume that the other processors are either not using the mapping yet
  * (i.e. during the bootstrap) or are executing the TLB shootdown code.  While
- * we don't care much about the former case, the processors in the latter case
+ * we don't care much about the former case, the processors in the latter case 
  * will do an implicit serialization by virtue of running the TLB shootdown
  * interrupt handler.
@@ -60 +60 @@
 
 #include <mm/page.h>
-#include <genarch/mm/page_ht.h>
-#include <genarch/mm/page_pt.h>
 #include <arch/mm/page.h>
 #include <arch/mm/asid.h>
@@ -72 +70 @@
 #include <debug.h>
 #include <arch.h>
-#include <syscall/copy.h>
-#include <errno.h>
-#include <align.h>
 
 /** Virtual operations for page subsystem. */
@@ -82 +77 @@
 {
         page_arch_init();
+}
+
+/** Map memory structure
+ *
+ * Identity-map memory structure
+ * considering possible crossings
+ * of page boundaries.
+ *
+ * @param addr Address of the structure.
+ * @param size Size of the structure.
+ *
+ */
+void map_structure(uintptr_t addr, size_t size)
+{
+        size_t length = size + (addr - (addr & ~(PAGE_SIZE - 1)));
+        size_t cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0);
+        
+        size_t i;
+        for (i = 0; i < cnt; i++)
+                page_mapping_insert(AS_KERNEL, addr + i * PAGE_SIZE,
+                    addr + i * PAGE_SIZE, PAGE_NOT_CACHEABLE | PAGE_WRITE);
+        
+        /* Repel prefetched accesses to the old mapping. */
+        memory_barrier();
 }
 
@@ -153 +172 @@
 }
 
-/** Make the mapping shared by all page tables (not address spaces).
- * 
- * @param base Starting virtual address of the range that is made global.
- * @param size Size of the address range that is made global.
- */
-void page_mapping_make_global(uintptr_t base, size_t size)
-{
-        ASSERT(page_mapping_operations);
-        ASSERT(page_mapping_operations->mapping_make_global);
-        
-        return page_mapping_operations->mapping_make_global(base, size);
-}
-
-int page_find_mapping(uintptr_t virt, void **phys)
-{
-        page_table_lock(AS, true);
-        
-        pte_t *pte = page_mapping_find(AS, virt, false);
-        if ((!PTE_VALID(pte)) || (!PTE_PRESENT(pte))) {
-                page_table_unlock(AS, true);
-                return ENOENT;
-        }
-        
-        *phys = (void *) PTE_GET_FRAME(pte) +
-            (virt - ALIGN_DOWN(virt, PAGE_SIZE));
-        
-        page_table_unlock(AS, true);
-        
-        return EOK;
-}
-
-/** Syscall wrapper for getting mapping of a virtual page.
- *
- * @return EOK on success.
- * @return ENOENT if no virtual address mapping found.
- *
- */
-sysarg_t sys_page_find_mapping(uintptr_t virt, void *phys_ptr)
-{
-        void *phys;
-        int rc = page_find_mapping(virt, &phys);
-        if (rc != EOK)
-                return rc;
-        
-        rc = copy_to_uspace(phys_ptr, &phys, sizeof(phys));
-        return (sysarg_t) rc;
-}
-
 /** @}
  */