Changeset d4673296 in mainline for kernel/generic/src/mm/km.c

Timestamp:

2012-01-27T21:12:25Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

adec5b45

Parents:

4dee0cb

Message:

Move hw_map() to km.c

File:

• kernel/generic/src/mm/km.c (modified) (2 diffs)

kernel/generic/src/mm/km.c

@@ -46 +46 @@
 #include <debug.h>
 #include <arch.h>
+#include <align.h>
+#include <macros.h>
+#include <bitops.h>
 
 static ra_arena_t *km_ni_arena;
@@ -120 +123 @@
         ra_free(km_ni_arena, page, size);
 }
+
+uintptr_t hw_map(uintptr_t physaddr, size_t size)
+{
+        uintptr_t virtaddr;
+        size_t asize;
+        size_t align;
+        pfn_t i;
+
+        asize = ALIGN_UP(size, PAGE_SIZE);
+        align = ispwr2(size) ? size : (1U << (fnzb(size) + 1));
+        virtaddr = km_page_alloc(asize, max(PAGE_SIZE, align));
+
+        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);
+        }
+        page_table_unlock(AS_KERNEL, true);
+        
+        return virtaddr;
+}
+
 
 /** Unmap kernen non-identity page.