Release 4.14 arch/x86/include/asm/page_types.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PAGE_DEFS_H

#define _ASM_X86_PAGE_DEFS_H

#include <linux/const.h>
#include <linux/types.h>
#include <linux/mem_encrypt.h>

/* PAGE_SHIFT determines the page size */

#define PAGE_SHIFT		12

#define PAGE_SIZE		(_AC(1,UL) << PAGE_SHIFT)

#define PAGE_MASK		(~(PAGE_SIZE-1))


#define PMD_PAGE_SIZE		(_AC(1, UL) << PMD_SHIFT)

#define PMD_PAGE_MASK		(~(PMD_PAGE_SIZE-1))


#define PUD_PAGE_SIZE		(_AC(1, UL) << PUD_SHIFT)

#define PUD_PAGE_MASK		(~(PUD_PAGE_SIZE-1))


#define __PHYSICAL_MASK		((phys_addr_t)(__sme_clr((1ULL << __PHYSICAL_MASK_SHIFT) - 1)))

#define __VIRTUAL_MASK		((1UL << __VIRTUAL_MASK_SHIFT) - 1)

/* Cast *PAGE_MASK to a signed type so that it is sign-extended if
   virtual addresses are 32-bits but physical addresses are larger
   (ie, 32-bit PAE). */

#define PHYSICAL_PAGE_MASK	(((signed long)PAGE_MASK) & __PHYSICAL_MASK)

#define PHYSICAL_PMD_PAGE_MASK	(((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK)

#define PHYSICAL_PUD_PAGE_MASK	(((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK)


#define HPAGE_SHIFT		PMD_SHIFT

#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)

#define HPAGE_MASK		(~(HPAGE_SIZE - 1))

#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)


#define HUGE_MAX_HSTATE 2


#define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)


#define VM_DATA_DEFAULT_FLAGS \
	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
         VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)


#define __PHYSICAL_START	ALIGN(CONFIG_PHYSICAL_START, \
                                      CONFIG_PHYSICAL_ALIGN)


#define __START_KERNEL		(__START_KERNEL_map + __PHYSICAL_START)

#ifdef CONFIG_X86_64
#include <asm/page_64_types.h>

#define IOREMAP_MAX_ORDER       (PUD_SHIFT)
#else
#include <asm/page_32_types.h>

#define IOREMAP_MAX_ORDER       (PMD_SHIFT)
#endif	/* CONFIG_X86_64 */

#ifndef __ASSEMBLY__

extern int devmem_is_allowed(unsigned long pagenr);

extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;



static inline phys_addr_t get_max_mapped(void)
{
	return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
}

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bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);

extern unsigned long init_memory_mapping(unsigned long start,
					 unsigned long end);

extern void initmem_init(void);

#endif	/* !__ASSEMBLY__ */

#endif	/* _ASM_X86_PAGE_DEFS_H */
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Directory: arch/x86/include/asm

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