v4.19.13 snapshot.
diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
new file mode 100644
index 0000000..5eef8be
--- /dev/null
+++ b/arch/sh/include/asm/page.h
@@ -0,0 +1,208 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_PAGE_H
+#define __ASM_SH_PAGE_H
+
+/*
+ * Copyright (C) 1999 Niibe Yutaka
+ */
+
+#include <linux/const.h>
+
+/* PAGE_SHIFT determines the page size */
+#if defined(CONFIG_PAGE_SIZE_4KB)
+# define PAGE_SHIFT 12
+#elif defined(CONFIG_PAGE_SIZE_8KB)
+# define PAGE_SHIFT 13
+#elif defined(CONFIG_PAGE_SIZE_16KB)
+# define PAGE_SHIFT 14
+#elif defined(CONFIG_PAGE_SIZE_64KB)
+# define PAGE_SHIFT 16
+#else
+# error "Bogus kernel page size?"
+#endif
+
+#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+#define PTE_MASK PAGE_MASK
+
+#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
+#define HPAGE_SHIFT 16
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
+#define HPAGE_SHIFT 18
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
+#define HPAGE_SHIFT 20
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
+#define HPAGE_SHIFT 22
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
+#define HPAGE_SHIFT 26
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
+#define HPAGE_SHIFT 29
+#endif
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
+#define HPAGE_MASK (~(HPAGE_SIZE-1))
+#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
+#endif
+
+#ifndef __ASSEMBLY__
+#include <asm/uncached.h>
+
+extern unsigned long shm_align_mask;
+extern unsigned long max_low_pfn, min_low_pfn;
+extern unsigned long memory_start, memory_end, memory_limit;
+
+static inline unsigned long
+pages_do_alias(unsigned long addr1, unsigned long addr2)
+{
+ return (addr1 ^ addr2) & shm_align_mask;
+}
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
+extern void copy_page(void *to, void *from);
+#define copy_user_page(to, from, vaddr, pg) __copy_user(to, from, PAGE_SIZE)
+
+struct page;
+struct vm_area_struct;
+
+extern void copy_user_highpage(struct page *to, struct page *from,
+ unsigned long vaddr, struct vm_area_struct *vma);
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+extern void clear_user_highpage(struct page *page, unsigned long vaddr);
+#define clear_user_highpage clear_user_highpage
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#ifdef CONFIG_X2TLB
+typedef struct { unsigned long pte_low, pte_high; } pte_t;
+typedef struct { unsigned long long pgprot; } pgprot_t;
+typedef struct { unsigned long long pgd; } pgd_t;
+#define pte_val(x) \
+ ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
+#define __pte(x) \
+ ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
+#elif defined(CONFIG_SUPERH32)
+typedef struct { unsigned long pte_low; } pte_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct { unsigned long pgd; } pgd_t;
+#define pte_val(x) ((x).pte_low)
+#define __pte(x) ((pte_t) { (x) } )
+#else
+typedef struct { unsigned long long pte_low; } pte_t;
+typedef struct { unsigned long long pgprot; } pgprot_t;
+typedef struct { unsigned long pgd; } pgd_t;
+#define pte_val(x) ((x).pte_low)
+#define __pte(x) ((pte_t) { (x) } )
+#endif
+
+#define pgd_val(x) ((x).pgd)
+#define pgprot_val(x) ((x).pgprot)
+
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x) ((pgprot_t) { (x) } )
+
+typedef struct page *pgtable_t;
+
+#define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * __MEMORY_START and SIZE are the physical addresses and size of RAM.
+ */
+#define __MEMORY_START CONFIG_MEMORY_START
+#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
+
+/*
+ * PHYSICAL_OFFSET is the offset in physical memory where the base
+ * of the kernel is loaded.
+ */
+#ifdef CONFIG_PHYSICAL_START
+#define PHYSICAL_OFFSET (CONFIG_PHYSICAL_START - __MEMORY_START)
+#else
+#define PHYSICAL_OFFSET 0
+#endif
+
+/*
+ * PAGE_OFFSET is the virtual address of the start of kernel address
+ * space.
+ */
+#define PAGE_OFFSET CONFIG_PAGE_OFFSET
+
+/*
+ * Virtual to physical RAM address translation.
+ *
+ * In 29 bit mode, the physical offset of RAM from address 0 is visible in
+ * the kernel virtual address space, and thus we don't have to take
+ * this into account when translating. However in 32 bit mode this offset
+ * is not visible (it is part of the PMB mapping) and so needs to be
+ * added or subtracted as required.
+ */
+#ifdef CONFIG_PMB
+#define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START)
+#define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START)
+#else
+#define ___pa(x) ((x)-PAGE_OFFSET)
+#define ___va(x) ((x)+PAGE_OFFSET)
+#endif
+
+#ifndef __ASSEMBLY__
+#define __pa(x) ___pa((unsigned long)x)
+#define __va(x) (void *)___va((unsigned long)x)
+#endif /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_UNCACHED_MAPPING
+#if defined(CONFIG_29BIT)
+#define UNCAC_ADDR(addr) P2SEGADDR(addr)
+#define CAC_ADDR(addr) P1SEGADDR(addr)
+#else
+#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start)
+#define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET)
+#endif
+#else
+#define UNCAC_ADDR(addr) ((addr))
+#define CAC_ADDR(addr) ((addr))
+#endif
+
+#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
+
+/*
+ * PFN = physical frame number (ie PFN 0 == physical address 0)
+ * PFN_START is the PFN of the first page of RAM. By defining this we
+ * don't have struct page entries for the portion of address space
+ * between physical address 0 and the start of RAM.
+ */
+#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
+#define ARCH_PFN_OFFSET (PFN_START)
+#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#ifdef CONFIG_FLATMEM
+#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
+#endif
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
+ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/getorder.h>
+
+/*
+ * Some drivers need to perform DMA into kmalloc'ed buffers
+ * and so we have to increase the kmalloc minalign for this.
+ */
+#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
+
+#ifdef CONFIG_SUPERH64
+/*
+ * While BYTES_PER_WORD == 4 on the current sh64 ABI, GCC will still
+ * happily generate {ld/st}.q pairs, requiring us to have 8-byte
+ * alignment to avoid traps. The kmalloc alignment is guaranteed by
+ * virtue of L1_CACHE_BYTES, requiring this to only be special cased
+ * for slab caches.
+ */
+#define ARCH_SLAB_MINALIGN 8
+#endif
+
+#endif /* __ASM_SH_PAGE_H */