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-rw-r--r--arch/x86/include/asm/page.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
new file mode 100644
index 000000000..9cc82f305
--- /dev/null
+++ b/arch/x86/include/asm/page.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#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_movable(vma, vaddr) \
+ alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE
+
+#ifndef __pa
+#define __pa(x) __phys_addr((unsigned long)(x))
+#endif
+
+#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)))
+
+#ifndef __va
+#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
+#endif
+
+#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))
+
+static __always_inline u64 __canonical_address(u64 vaddr, u8 vaddr_bits)
+{
+ return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits);
+}
+
+static __always_inline u64 __is_canonical_address(u64 vaddr, u8 vaddr_bits)
+{
+ return __canonical_address(vaddr, vaddr_bits) == vaddr;
+}
+
+#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 */