/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PAGE_64_H
#define _ASM_X86_PAGE_64_H

#include <asm/page_64_types.h>

#ifndef __ASSEMBLY__
#include <asm/cpufeatures.h>
#include <asm/alternative.h>

#include <linux/kmsan-checks.h>


extern unsigned long max_pfn;
extern unsigned long phys_base;

extern unsigned long page_offset_base;
extern unsigned long vmalloc_base;
extern unsigned long vmemmap_base;
extern unsigned long physmem_end;

static __always_inline unsigned long __phys_addr_nodebug(unsigned long x)
{
	unsigned long y = x - __START_KERNEL_map;

	
	x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));

	return x;
}

#ifdef CONFIG_DEBUG_VIRTUAL
extern unsigned long __phys_addr(unsigned long);
extern unsigned long __phys_addr_symbol(unsigned long);
#else
#define __phys_addr(x)		__phys_addr_nodebug(x)
#define __phys_addr_symbol(x) \
	((unsigned long)(x) - __START_KERNEL_map + phys_base)
#endif

#define __phys_reloc_hide(x)	(x)

#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn)          ((pfn) < max_pfn)
#endif

void clear_page_orig(void *page);
void clear_page_rep(void *page);
void clear_page_erms(void *page);

static inline void clear_page(void *page)
{
	
	kmsan_unpoison_memory(page, PAGE_SIZE);
	alternative_call_2(clear_page_orig,
			   clear_page_rep, X86_FEATURE_REP_GOOD,
			   clear_page_erms, X86_FEATURE_ERMS,
			   "=D" (page),
			   "0" (page)
			   : "cc", "memory", "rax", "rcx");
}

void copy_page(void *to, void *from);

#ifdef CONFIG_X86_5LEVEL

static __always_inline unsigned long task_size_max(void)
{
	unsigned long ret;

	alternative_io("movq %[small],%0","movq %[large],%0",
			X86_FEATURE_LA57,
			"=r" (ret),
			[small] "i" ((1ul << 47)-PAGE_SIZE),
			[large] "i" ((1ul << 56)-PAGE_SIZE));

	return ret;
}
#endif	

#endif	

#ifdef CONFIG_X86_VSYSCALL_EMULATION
# define __HAVE_ARCH_GATE_AREA 1
#endif

#endif 
