--- zzzz-none-000/linux-3.10.107/arch/mips/include/asm/page.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/include/asm/page.h	2021-02-04 17:41:59.000000000 +0000
@@ -11,6 +11,8 @@
 
 #include <spaces.h>
 #include <linux/const.h>
+#include <linux/kernel.h>
+#include <asm/mipsregs.h>
 
 /*
  * PAGE_SHIFT determines the page size
@@ -33,6 +35,29 @@
 #define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK	(~((1 << PAGE_SHIFT) - 1))
 
+/*
+ * This is used for calculating the real page sizes
+ * for FTLB or VTLB + FTLB configurations.
+ */
+static inline unsigned int page_size_ftlb(unsigned int mmuextdef)
+{
+	switch (mmuextdef) {
+	case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
+		if (PAGE_SIZE == (1 << 30))
+			return 5;
+		if (PAGE_SIZE == (1llu << 32))
+			return 6;
+		if (PAGE_SIZE > (256 << 10))
+			return 7; /* reserved */
+			/* fall through */
+	case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
+		return (PAGE_SHIFT - 10) / 2;
+	default:
+		panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n",
+		      mmuextdef >> 14);
+	}
+}
+
 #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
 #define HPAGE_SHIFT	(PAGE_SHIFT + PAGE_SHIFT - 3)
 #define HPAGE_SIZE	(_AC(1,UL) << HPAGE_SHIFT)
@@ -80,8 +105,6 @@
 		flush_data_cache_page((unsigned long)addr);
 }
 
-extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-	struct page *to);
 struct vm_area_struct;
 extern void copy_user_highpage(struct page *to, struct page *from,
 	unsigned long vaddr, struct vm_area_struct *vma);
@@ -91,7 +114,7 @@
 /*
  * These are used to make use of C type-checking..
  */
-#ifdef CONFIG_64BIT_PHYS_ADDR
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
   #ifdef CONFIG_CPU_MIPS32
     typedef struct { unsigned long pte_low, pte_high; } pte_t;
     #define pte_val(x)	  ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
@@ -165,7 +188,9 @@
  * https://patchwork.linux-mips.org/patch/1541/
  */
 
+#ifndef __pa_symbol
 #define __pa_symbol(x)	__pa(RELOC_HIDE((unsigned long)(x), 0))
+#endif
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
@@ -175,8 +200,9 @@
 {
 	/* avoid <linux/mm.h> include hell */
 	extern unsigned long max_mapnr;
+	unsigned long pfn_offset = ARCH_PFN_OFFSET;
 
-	return pfn >= ARCH_PFN_OFFSET && pfn < max_mapnr;
+	return pfn >= pfn_offset && pfn < max_mapnr;
 }
 
 #elif defined(CONFIG_SPARSEMEM)
@@ -196,7 +222,8 @@
 
 #endif
 
-#define virt_to_page(kaddr)	pfn_to_page(PFN_DOWN(virt_to_phys(kaddr)))
+#define virt_to_page(kaddr)	pfn_to_page(PFN_DOWN(virt_to_phys((void *)     \
+								  (kaddr))))
 
 extern int __virt_addr_valid(const volatile void *kaddr);
 #define virt_addr_valid(kaddr)						\
@@ -205,10 +232,8 @@
 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
 				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-#define UNCAC_ADDR(addr)	((addr) - PAGE_OFFSET + UNCAC_BASE +	\
-								PHYS_OFFSET)
-#define CAC_ADDR(addr)		((addr) - UNCAC_BASE + PAGE_OFFSET -	\
-								PHYS_OFFSET)
+#define UNCAC_ADDR(addr)	((addr) - PAGE_OFFSET + UNCAC_BASE)
+#define CAC_ADDR(addr)		((addr) - UNCAC_BASE + PAGE_OFFSET)
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>