X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fum%2Fkernel%2Fphysmem.c;h=544665e04513b33b4106ccd564be392e22d09b8f;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=3253bc0e3a5cad2551cbd1b2fc40fabc15b1cdae;hpb=1a69f36a78895dad9a6b97ffa2d6d2b7c3975b5d;p=linux-2.6.git

diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 3253bc0e3..544665e04 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -246,17 +246,7 @@ int is_remapped(void *virt)
 /* Changed during early boot */
 unsigned long high_physmem;
 
-extern unsigned long physmem_size;
-
-void *to_virt(unsigned long phys)
-{
-	return((void *) uml_physmem + phys);
-}
-
-unsigned long to_phys(void *virt)
-{
-	return(((unsigned long) virt) - uml_physmem);
-}
+extern unsigned long long physmem_size;
 
 int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 {
@@ -275,7 +265,7 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 	highmem_len = highmem_pages * sizeof(struct page);
 
 	total_pages = phys_pages + iomem_pages + highmem_pages;
-	total_len = phys_len + iomem_pages + highmem_len;
+	total_len = phys_len + iomem_len + highmem_len;
 
 	if(kmalloc_ok){
 		map = kmalloc(total_len, GFP_KERNEL);
@@ -294,35 +284,10 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 		INIT_LIST_HEAD(&p->lru);
 	}
 
-	mem_map = map;
 	max_mapnr = total_pages;
 	return(0);
 }
 
-struct page *phys_to_page(const unsigned long phys)
-{
-	return(&mem_map[phys >> PAGE_SHIFT]);
-}
-
-struct page *__virt_to_page(const unsigned long virt)
-{
-	return(&mem_map[__pa(virt) >> PAGE_SHIFT]);
-}
-
-unsigned long page_to_phys(struct page *page)
-{
-	return((page - mem_map) << PAGE_SHIFT);
-}
-
-pte_t mk_pte(struct page *page, pgprot_t pgprot)
-{
-	pte_t pte;
-
-	pte_val(pte) = page_to_phys(page) + pgprot_val(pgprot);
-	if(pte_present(pte)) pte_mknewprot(pte_mknewpage(pte));
-	return(pte);
-}
-
 /* Changed during early boot */
 static unsigned long kmem_top = 0;
 
@@ -353,8 +318,10 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
 
 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
 
+extern int __syscall_stub_start, __binary_start;
+
 void setup_physmem(unsigned long start, unsigned long reserve_end,
-		   unsigned long len, unsigned long highmem)
+		   unsigned long len, unsigned long long highmem)
 {
 	unsigned long reserve = reserve_end - start;
 	int pfn = PFN_UP(__pa(reserve_end));
@@ -371,6 +338,12 @@ void setup_physmem(unsigned long start, unsigned long reserve_end,
 		exit(1);
 	}
 
+	/* Special kludge - This page will be mapped in to userspace processes
+	 * from physmem_fd, so it needs to be written out there.
+	 */
+	os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
+	os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE);
+
 	bootmap_size = init_bootmem(pfn, pfn + delta);
 	free_bootmem(__pa(reserve_end) + bootmap_size,
 		     len - bootmap_size - reserve);