Merge branch 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip...

[pandora-kernel.git] / include / asm-x86 / page_64.h

diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index f7393bc..c6916c8 100644 (file)
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -5,7 +5,7 @@
 
 #define THREAD_ORDER   1
 #define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
-#define CURRENT_MASK (~(THREAD_SIZE-1))
+#define CURRENT_MASK (~(THREAD_SIZE - 1))
 
 #define EXCEPTION_STACK_ORDER 0
 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
@@ -26,7 +26,13 @@
 #define PUD_PAGE_SIZE          (_AC(1, UL) << PUD_SHIFT)
 #define PUD_PAGE_MASK          (~(PUD_PAGE_SIZE-1))
 
-#define __PAGE_OFFSET           _AC(0xffff810000000000, UL)
+/*
+ * Set __PAGE_OFFSET to the most negative possible address +
+ * PGDIR_SIZE*16 (pgd slot 272).  The gap is to allow a space for a
+ * hypervisor to fit.  Choosing 16 slots here is arbitrary, but it's
+ * what Xen requires.
+ */
+#define __PAGE_OFFSET           _AC(0xffff880000000000, UL)
 
 #define __PHYSICAL_START       CONFIG_PHYSICAL_START
 #define __KERNEL_ALIGN         0x200000
@@ -47,15 +53,19 @@
 #define __PHYSICAL_MASK_SHIFT  46
 #define __VIRTUAL_MASK_SHIFT   48
 
-#define KERNEL_TEXT_SIZE  (40*1024*1024)
-#define KERNEL_TEXT_START _AC(0xffffffff80000000, UL)
+/*
+ * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
+ * arch/x86/kernel/head_64.S), and it is mapped here:
+ */
+#define KERNEL_IMAGE_SIZE      (512 * 1024 * 1024)
+#define KERNEL_IMAGE_START     _AC(0xffffffff80000000, UL)
 
 #ifndef __ASSEMBLY__
 void clear_page(void *page);
 void copy_page(void *to, void *from);
 
-extern unsigned long end_pfn;
-extern unsigned long end_pfn_map;
+/* duplicated to the one in bootmem.h */
+extern unsigned long max_pfn;
 extern unsigned long phys_base;
 
 extern unsigned long __phys_addr(unsigned long);
@@ -77,10 +87,18 @@ typedef struct { pteval_t pte; } pte_t;
 
 #define vmemmap ((struct page *)VMEMMAP_START)
 
+extern unsigned long init_memory_mapping(unsigned long start,
+                                        unsigned long end);
+
+extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
+
+extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
+extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
+
 #endif /* !__ASSEMBLY__ */
 
 #ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)          ((pfn) < end_pfn)
+#define pfn_valid(pfn)          ((pfn) < max_pfn)
 #endif