x86: page.h: move pa and va related things
# HG changeset patch
# User Jeremy Fitzhardinge <jeremy@xensource.com>
# Date 1199319656 28800
# Node ID d617b72a0cc9d14bde2087d065c36d4ed3265761
# Parent 3bd7db6e85e66e7f3362874802df26a82fcb2d92
x86: page.h: move pa and va related things
Move and unify the virtual<->physical address space conversion
functions.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index ef393c3..9830eeb 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -80,6 +80,9 @@
void clear_page(void *page);
void copy_page(void *to, void *from);
+extern unsigned long __phys_addr(unsigned long);
+#define __phys_reloc_hide(x) (x)
+
/*
* These are used to make use of C type-checking..
*/
@@ -174,6 +177,13 @@
#endif
#ifndef __ASSEMBLY__
+#define __phys_addr(x) ((x)-PAGE_OFFSET)
+#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
+
+#ifdef CONFIG_FLATMEM
+#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#endif /* CONFIG_FLATMEM */
+
#ifdef CONFIG_X86_USE_3DNOW
#include <asm/mmx.h>
@@ -299,6 +309,20 @@
#endif /* CONFIG_PARAVIRT */
+#define __pa(x) __phys_addr((unsigned long)(x))
+/* __pa_symbol should be used for C visible symbols.
+ This seems to be the official gcc blessed way to do such arithmetic. */
+#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
+
+#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
+
+#define __boot_va(x) __va(x)
+#define __boot_pa(x) __pa(x)
+
+#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
#endif /* __ASSEMBLY__ */