[mirror_ubuntu-bionic-kernel.git] / arch / m32r / include / asm / page.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M32R_PAGE_H
#define _ASM_M32R_PAGE_H

#include <linux/const.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))

#ifndef __ASSEMBLY__

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

#define clear_user_page(page, vaddr, pg)	clear_page(page)
#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)

#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
#define pte_val(x)	((x).pte)
#define PTE_MASK	PAGE_MASK

typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;

#define pmd_val(x)	((x).pmd)
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)

#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )

#endif /* !__ASSEMBLY__ */

/*
 * This handles the memory map.. We could make this a config
 * option, but too many people screw it up, and too few need
 * it.
 *
 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
 * a virtual address space of one gigabyte, which limits the
 * amount of physical memory you can use to about 950MB.
 *
 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
 * and CONFIG_HIGHMEM64G options in the kernel configuration.
 */

#define __MEMORY_START  CONFIG_MEMORY_START
#define __MEMORY_SIZE   CONFIG_MEMORY_SIZE

#ifdef CONFIG_MMU
#define __PAGE_OFFSET  (0x80000000)
#else
#define __PAGE_OFFSET  (0x00000000)
#endif

#define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)
#define __pa(x)			((unsigned long)(x) - PAGE_OFFSET)
#define __va(x)			((void *)((unsigned long)(x) + PAGE_OFFSET))

#ifndef CONFIG_DISCONTIGMEM
#define PFN_BASE		(CONFIG_MEMORY_START >> PAGE_SHIFT)
#define ARCH_PFN_OFFSET		PFN_BASE
#define pfn_valid(pfn)		(((pfn) - PFN_BASE) < max_mapnr)
#endif  /* !CONFIG_DISCONTIGMEM */

#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#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 )

#define devmem_is_allowed(x) 1

#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>

#endif /* _ASM_M32R_PAGE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ASM_M32R_PAGE_H
	3	#define _ASM_M32R_PAGE_H
	4
8b1c9bef TA	5	#include <linux/const.h>
8b1c9bef TA	6
1da177e4 LT	7	/* PAGE_SHIFT determines the page size */
1da177e4 LT	8	#define PAGE_SHIFT 12
8b1c9bef	9	#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
1da177e4 LT	10	#define PAGE_MASK (~(PAGE_SIZE-1))
1da177e4 LT	11
1da177e4 LT	12	#ifndef __ASSEMBLY__
	13
	14	extern void clear_page(void *to);
	15	extern void copy_page(void to, void from);
	16
	17	#define clear_user_page(page, vaddr, pg) clear_page(page)
	18	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	19
769848c0 MG	20	#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
769848c0 MG	21	alloc_page_vma(GFP_HIGHUSER \| __GFP_ZERO \| movableflags, vma, vaddr)
1da177e4 LT	22	#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
	23
	24	/*
	25	* These are used to make use of C type-checking..
	26	*/
	27	typedef struct { unsigned long pte; } pte_t;
	28	typedef struct { unsigned long pmd; } pmd_t;
	29	typedef struct { unsigned long pgd; } pgd_t;
	30	#define pte_val(x) ((x).pte)
	31	#define PTE_MASK PAGE_MASK
	32
	33	typedef struct { unsigned long pgprot; } pgprot_t;
2f569afd	34	typedef struct page *pgtable_t;
1da177e4 LT	35
	36	#define pmd_val(x) ((x).pmd)
	37	#define pgd_val(x) ((x).pgd)
	38	#define pgprot_val(x) ((x).pgprot)
	39
	40	#define __pte(x) ((pte_t) { (x) } )
	41	#define __pmd(x) ((pmd_t) { (x) } )
	42	#define __pgd(x) ((pgd_t) { (x) } )
	43	#define __pgprot(x) ((pgprot_t) { (x) } )
	44
	45	#endif /* !__ASSEMBLY__ */
	46
1da177e4 LT	47	/*
	48	* This handles the memory map.. We could make this a config
	49	* option, but too many people screw it up, and too few need
	50	* it.
	51	*
	52	* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
	53	* a virtual address space of one gigabyte, which limits the
	54	* amount of physical memory you can use to about 950MB.
	55	*
	56	* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
	57	* and CONFIG_HIGHMEM64G options in the kernel configuration.
	58	*/
	59
1da177e4 LT	60	#define __MEMORY_START CONFIG_MEMORY_START
	61	#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
	62
	63	#ifdef CONFIG_MMU
	64	#define __PAGE_OFFSET (0x80000000)
	65	#else
	66	#define __PAGE_OFFSET (0x00000000)
	67	#endif
	68
	69	#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
	70	#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
	71	#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
	72
	73	#ifndef CONFIG_DISCONTIGMEM
	74	#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
7126cffe	75	#define ARCH_PFN_OFFSET PFN_BASE
1da177e4 LT	76	#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
	77	#endif /* !CONFIG_DISCONTIGMEM */
	78
	79	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
	80	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
	81
	82	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	83	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC )
	84
	85	#define devmem_is_allowed(x) 1
	86
7126cffe	87	#include <asm-generic/memory_model.h>
5b17e1cd	88	#include <asm-generic/getorder.h>
fd4fd5aa	89
1da177e4	90	#endif /* _ASM_M32R_PAGE_H */