Changeset c1982e45 in mainline for arch/amd64/src/mm/page.c

Timestamp:

2006-05-20T21:11:08Z (19 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

125e944

Parents:

1068f6a

Message:

make hardware memory mapping more generic

File:

• arch/amd64/src/mm/page.c (modified) (4 diffs)

arch/amd64/src/mm/page.c

@@ -72 +72 @@
         SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \
     }
+
+
 void page_arch_init(void)
 {
@@ -108 +110 @@
         }
 }
+
 
 /** Identity page mapper
@@ -162 +165 @@
 }
 
+
 void page_fault(int n, istate_t *istate)
 {
@@ -173 +177 @@
         }
 }
+
+
+__address hw_map(__address 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)
+        
+        __address virtaddr = PA2KA(last_frame);
+        pfn_t i;
+        for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
+                page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
+        
+        last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
+        
+        return virtaddr;
+}