Changes in kernel/generic/src/mm/page.c [404be7c:6645a14] in mainline

File:

• kernel/generic/src/mm/page.c (modified) (3 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.
@@ -65 +65 @@
 #include <arch/mm/asid.h>
 #include <mm/as.h>
-#include <mm/km.h>
 #include <mm/frame.h>
 #include <arch/barrier.h>
@@ -178 +177 @@
 }
 
-uintptr_t hw_map(uintptr_t physaddr, size_t size)
-{
-        uintptr_t virtaddr;
-        size_t asize;
-        pfn_t i;
-
-        asize = ALIGN_UP(size, PAGE_SIZE);
-        virtaddr = km_page_alloc(asize, PAGE_SIZE);
-
-        page_table_lock(AS_KERNEL, true);
-        for (i = 0; i < ADDR2PFN(asize); i++) {
-                uintptr_t addr = PFN2ADDR(i);
-                page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr,
-                    PAGE_NOT_CACHEABLE | PAGE_WRITE);
+int page_find_mapping(uintptr_t virt, void **phys)
+{
+        mutex_lock(&AS->lock);
+        
+        pte_t *pte = page_mapping_find(AS, virt, false);
+        if ((!PTE_VALID(pte)) || (!PTE_PRESENT(pte))) {
+                mutex_unlock(&AS->lock);
+                return ENOENT;
         }
-        page_table_unlock(AS_KERNEL, true);
-        
-        return virtaddr;
-}
-
+        
+        *phys = (void *) PTE_GET_FRAME(pte) +
+            (virt - ALIGN_DOWN(virt, PAGE_SIZE));
+        
+        mutex_unlock(&AS->lock);
+        
+        return EOK;
+}
 
 /** Syscall wrapper for getting mapping of a virtual page.
- * 
- * @retval EOK Everything went find, @p uspace_frame and @p uspace_node
- *             contains correct values.
- * @retval ENOENT Virtual address has no mapping.
- */
-sysarg_t sys_page_find_mapping(uintptr_t virt_address,
-    uintptr_t *uspace_frame)
-{
-        mutex_lock(&AS->lock);
-        
-        pte_t *pte = page_mapping_find(AS, virt_address, false);
-        if (!PTE_VALID(pte) || !PTE_PRESENT(pte)) {
-                mutex_unlock(&AS->lock);
-                
-                return (sysarg_t) ENOENT;
-        }
-        
-        uintptr_t phys_address = PTE_GET_FRAME(pte);
-        
-        mutex_unlock(&AS->lock);
-        
-        int rc = copy_to_uspace(uspace_frame,
-            &phys_address, sizeof(phys_address));
-        if (rc != EOK) {
-                return (sysarg_t) rc;
-        }
-        
-        return EOK;
+ *
+ * @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;
 }