Changeset 2bf4936 in mainline for kernel/arch/sparc64/src/mm/page.c

Timestamp:

2009-04-14T15:50:56Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

47a6708

Parents:

577b531

Message:

On sparc64, do fast indentity mapping only for physical memory.
For addresses above physical memory, such as I/O devices,
fall through to the C miss handler and map the memory noncacheably.
Replace deprecated Bicc instructions with proper Bcc instructions.

File:

• kernel/arch/sparc64/src/mm/page.c (modified) (1 diff)

kernel/arch/sparc64/src/mm/page.c

@@ -63 +63 @@
 uintptr_t hw_map(uintptr_t physaddr, size_t size)
 {
-        if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
-                panic("Unable to map physical memory %p (%d bytes).", physaddr, size)
-        
-        uintptr_t virtaddr = PA2KA(last_frame);
-        pfn_t i;
-        for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
-                uintptr_t addr = PFN2ADDR(i);
-                page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);
-        }
-        
-        last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
-        
-        return virtaddr;
+        return KA2PA(physaddr);
 }