Changeset c6e314a in mainline for kernel/arch/sparc64/src/mm/frame.c

Timestamp:

2006-07-14T11:39:02Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

08a7802f

Parents:

10b890b

Message:

Change hw_map() on sparc64 to use virtual addresses that are
beyond the end of physical memory. It is beneficial in two
ways: first, physical memory is no longer being wasted by
otherwise necessary calls to frame_alloc() and, second,
virtual addresses for devices are now correctly allocated
and do not overlap with the 4M TLB-locked mapping for
kernel text and data.

File:

• kernel/arch/sparc64/src/mm/frame.c (modified) (3 diffs)

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

@@ -36 +36 @@
 #include <mm/frame.h>
 #include <arch/boot/boot.h>
+#include <arch/types.h>
 #include <config.h>
 #include <align.h>
+#include <macros.h>
+
+uintptr_t last_frame = NULL;
 
 /** Create memory zones according to information stored in bootinfo.
@@ -51 +55 @@
 
         for (i = 0; i < bootinfo.memmap.count; i++) {
+                uintptr_t start = bootinfo.memmap.zones[i].start;
+                size_t size = bootinfo.memmap.zones[i].size;
 
                 /*
@@ -57 +63 @@
                  */
         
-                confdata = ADDR2PFN(bootinfo.memmap.zones[i].start);
+                confdata = ADDR2PFN(start);
                 if (confdata == 0)
                         confdata = 2;
-                zone_create(ADDR2PFN(bootinfo.memmap.zones[i].start),
-                        SIZE2FRAMES(ALIGN_DOWN(bootinfo.memmap.zones[i].size, PAGE_SIZE)),
-                        confdata, 0);
+                zone_create(ADDR2PFN(start), SIZE2FRAMES(ALIGN_DOWN(size, FRAME_SIZE)), confdata, 0);
+                
+                last_frame = max(last_frame, start + ALIGN_UP(size, FRAME_SIZE));
         }