From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 arch/x86/include/asm/page.h | 76 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 arch/x86/include/asm/page.h

(limited to 'arch/x86/include/asm/page.h')

diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
new file mode 100644
index 000000000..802dde30c
--- /dev/null
+++ b/arch/x86/include/asm/page.h
@@ -0,0 +1,76 @@
+#ifndef _ASM_X86_PAGE_H
+#define _ASM_X86_PAGE_H
+
+#include <linux/types.h>
+
+#ifdef __KERNEL__
+
+#include <asm/page_types.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/page_64.h>
+#else
+#include <asm/page_32.h>
+#endif	/* CONFIG_X86_64 */
+
+#ifndef __ASSEMBLY__
+
+struct page;
+
+#include <linux/range.h>
+extern struct range pfn_mapped[];
+extern int nr_pfn_mapped;
+
+static inline void clear_user_page(void *page, unsigned long vaddr,
+				   struct page *pg)
+{
+	clear_page(page);
+}
+
+static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
+				  struct page *topage)
+{
+	copy_page(to, from);
+}
+
+#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
+	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+#define __pa(x)		__phys_addr((unsigned long)(x))
+#define __pa_nodebug(x)	__phys_addr_nodebug((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. */
+/*
+ * We need __phys_reloc_hide() here because gcc may assume that there is no
+ * overflow during __pa() calculation and can optimize it unexpectedly.
+ * Newer versions of gcc provide -fno-strict-overflow switch to handle this
+ * case properly. Once all supported versions of gcc understand it, we can
+ * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
+ */
+#define __pa_symbol(x) \
+	__phys_addr_symbol(__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)
+
+/*
+ * virt_to_page(kaddr) returns a valid pointer if and only if
+ * virt_addr_valid(kaddr) returns true.
+ */
+#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
+extern bool __virt_addr_valid(unsigned long kaddr);
+#define virt_addr_valid(kaddr)	__virt_addr_valid((unsigned long) (kaddr))
+
+#endif	/* __ASSEMBLY__ */
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/getorder.h>
+
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+
+#endif	/* __KERNEL__ */
+#endif /* _ASM_X86_PAGE_H */
-- 
cgit v1.2.3-54-g00ecf