From 2d1ff7482b97bf6db2ed9da794c125b3a763a9d7 Mon Sep 17 00:00:00 2001
From: stefan <stefan@315a16e6-25f9-4109-90ae-ca3045a26c18>
Date: Sun, 22 Aug 2010 11:00:56 +0000
Subject: [PATCH] - add a more precise calculation of the kernel position

git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@122 315a16e6-25f9-4109-90ae-ca3045a26c18
---
 link.ld     | 5 +++--
 mm/memory.c | 7 +++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/link.ld b/link.ld
index ab752f97..29f6243f 100644
--- a/link.ld
+++ b/link.ld
@@ -1,10 +1,11 @@
 OUTPUT_FORMAT("binary")
 ENTRY(start)
 phys = 0x00100000;
-kernel_start = .;
+
 SECTIONS
 {
   .text phys : AT(phys) {
+    kernel_start = .;
     code = .;
     *(multiboot)
     *(.text)
@@ -24,6 +25,6 @@ SECTIONS
     . = ALIGN(4096);
   }
   end = .;
+  kernel_end = .;
 }
 . = ALIGN(4096);
-kernel_end = .;
diff --git a/mm/memory.c b/mm/memory.c
index 575339f6..6646f598 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -142,16 +142,19 @@ int mmu_init(void)
 	#error Currently, MetalSVM supports only Multiboot or the RockCreek processor!
 #endif
 
-	/* kernel is aligned to page size */
 	kernel_size = (size_t) &kernel_end - (size_t) &kernel_start;
+	if (kernel_size % PAGE_SIZE)
+		kernel_size += PAGE_SIZE - kernel_size % PAGE_SIZE;
 	atomic_int32_add(&total_allocated_pages, kernel_size/PAGE_SIZE);
 	atomic_int32_sub(&total_available_pages, kernel_size/PAGE_SIZE);
 
 	/* set kernel space as used */
 	for(i=(size_t) &kernel_start / PAGE_SIZE; i < (size_t) &kernel_end / PAGE_SIZE; i++)
 		page_set_mark(i);
+	if ((size_t) &kernel_end % PAGE_SIZE)
+		page_set_mark(i);
 
-	alloc_start = (unsigned int) (&kernel_end) / PAGE_SIZE + 1;
+	alloc_start = (unsigned int) (&kernel_end) / PAGE_SIZE;
 	alloc_start += 128*1024;
 
 	return 0;