Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6

[safe/jmp/linux-2.6] / include / asm-x86 / page_64.h

diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index f5e0543..c6916c8 100644 (file)
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -1,68 +1,104 @@
 #ifndef _X86_64_PAGE_H
 #define _X86_64_PAGE_H
 
-#ifdef __KERNEL__
-#ifndef __ASSEMBLY__
+#define PAGETABLE_LEVELS       4
+
+#define THREAD_ORDER   1
+#define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
+#define CURRENT_MASK (~(THREAD_SIZE - 1))
+
+#define EXCEPTION_STACK_ORDER 0
+#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
+
+#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
+#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
+
+#define IRQSTACK_ORDER 2
+#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
 
-extern unsigned long end_pfn;
-extern unsigned long end_pfn_map;
+#define STACKFAULT_STACK 1
+#define DOUBLEFAULT_STACK 2
+#define NMI_STACK 3
+#define DEBUG_STACK 4
+#define MCE_STACK 5
+#define N_EXCEPTION_STACKS 5  /* hw limit: 7 */
+
+#define PUD_PAGE_SIZE          (_AC(1, UL) << PUD_SHIFT)
+#define PUD_PAGE_MASK          (~(PUD_PAGE_SIZE-1))
 
 /*
- * These are used to make use of C type-checking..
+ * 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.
  */
-typedef struct { unsigned long pte; } pte_t;
-typedef struct { unsigned long pmd; } pmd_t;
-typedef struct { unsigned long pud; } pud_t;
-typedef struct { unsigned long pgd; } pgd_t;
-#define PTE_MASK       PHYSICAL_PAGE_MASK
+#define __PAGE_OFFSET           _AC(0xffff880000000000, UL)
 
-typedef struct { unsigned long pgprot; } pgprot_t;
+#define __PHYSICAL_START       CONFIG_PHYSICAL_START
+#define __KERNEL_ALIGN         0x200000
 
-extern unsigned long phys_base;
+/*
+ * Make sure kernel is aligned to 2MB address. Catching it at compile
+ * time is better. Change your config file and compile the kernel
+ * for a 2MB aligned address (CONFIG_PHYSICAL_START)
+ */
+#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
+#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
+#endif
 
-#define pte_val(x)     ((x).pte)
-#define pmd_val(x)     ((x).pmd)
-#define pud_val(x)     ((x).pud)
-#define pgd_val(x)     ((x).pgd)
-#define pgprot_val(x)  ((x).pgprot)
+#define __START_KERNEL         (__START_KERNEL_map + __PHYSICAL_START)
+#define __START_KERNEL_map     _AC(0xffffffff80000000, UL)
 
-#define __pte(x) ((pte_t) { (x) } )
-#define __pmd(x) ((pmd_t) { (x) } )
-#define __pud(x) ((pud_t) { (x) } )
-#define __pgd(x) ((pgd_t) { (x) } )
-#define __pgprot(x)    ((pgprot_t) { (x) } )
+/* See Documentation/x86_64/mm.txt for a description of the memory map. */
+#define __PHYSICAL_MASK_SHIFT  46
+#define __VIRTUAL_MASK_SHIFT   48
 
-#endif /* !__ASSEMBLY__ */
+/*
+ * 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);
 
-#include <asm/bug.h>
+/* duplicated to the one in bootmem.h */
+extern unsigned long max_pfn;
+extern unsigned long phys_base;
 
 extern unsigned long __phys_addr(unsigned long);
+#define __phys_reloc_hide(x)   (x)
 
-#endif /* __ASSEMBLY__ */
-
-#define __pa(x)                __phys_addr((unsigned long)(x))
-#define __pa_symbol(x) __phys_addr((unsigned long)(x))
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef unsigned long  pteval_t;
+typedef unsigned long  pmdval_t;
+typedef unsigned long  pudval_t;
+typedef unsigned long  pgdval_t;
+typedef unsigned long  pgprotval_t;
+typedef unsigned long  phys_addr_t;
 
-#define __va(x)                        ((void *)((unsigned long)(x)+PAGE_OFFSET))
-#define __boot_va(x)           __va(x)
-#define __boot_pa(x)           __pa(x)
+typedef struct page *pgtable_t;
 
-#define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-#define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
+typedef struct { pteval_t pte; } pte_t;
 
-#define __HAVE_ARCH_GATE_AREA 1        
 #define vmemmap ((struct page *)VMEMMAP_START)
 
-#include <asm-generic/memory_model.h>
-#include <asm-generic/page.h>
+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 /* __KERNEL__ */
+#endif /* !__ASSEMBLY__ */
 
 #ifdef CONFIG_FLATMEM
-#define pfn_valid(pfn)          ((pfn) < end_pfn)
+#define pfn_valid(pfn)          ((pfn) < max_pfn)
 #endif