[deliverable/linux.git] / include / asm-mn10300 / page.h

/* MN10300 Page table definitions
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#ifndef _ASM_PAGE_H
#define _ASM_PAGE_H

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT	12

#ifndef __ASSEMBLY__
#define PAGE_SIZE	(1UL << PAGE_SHIFT)
#define PAGE_MASK	(~(PAGE_SIZE - 1))
#else
#define PAGE_SIZE	+(1 << PAGE_SHIFT)	/* unary plus marks an
						 * immediate val not an addr */
#define PAGE_MASK	+(~(PAGE_SIZE - 1))
#endif

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to, from)	memcpy((void *)(to), (void *)(from), PAGE_SIZE)

#define clear_user_page(addr, vaddr, page)	clear_page(addr)
#define copy_user_page(vto, vfrom, vaddr, to)	copy_page(vto, vfrom)

/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;

#define PTE_MASK	PAGE_MASK
#define HPAGE_SHIFT	22

#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

#define pte_val(x)	((x).pte)
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)

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

#include <asm-generic/pgtable-nopmd.h>

#endif /* !__ASSEMBLY__ */

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)

/*
 * 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.
 */

#ifndef __ASSEMBLY__

/* Pure 2^n version of get_order */
static inline int get_order(unsigned long size) __attribute__((const));
static inline int get_order(unsigned long size)
{
	int order;

	size = (size - 1) >> (PAGE_SHIFT - 1);
	order = -1;
	do {
		size >>= 1;
		order++;
	} while (size);
	return order;
}

#endif /* __ASSEMBLY__ */

#include <asm/page_offset.h>

#define __PAGE_OFFSET		(PAGE_OFFSET_RAW)
#define PAGE_OFFSET		((unsigned long) __PAGE_OFFSET)

/*
 * main RAM and kernel working space are coincident at 0x90000000, but to make
 * life more interesting, there's also an uncached virtual shadow at 0xb0000000
 * - these mappings are fixed in the MMU
 */
#define __pfn_disp		(CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT)

#define __pa(x)			((unsigned long)(x))
#define __va(x)			((void *)(unsigned long)(x))
#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
#define pfn_to_page(pfn)	(mem_map + ((pfn) - __pfn_disp))
#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + __pfn_disp)

#define pfn_valid(pfn)					\
({							\
	unsigned long __pfn = (pfn) - __pfn_disp;	\
	__pfn < max_mapnr;				\
})

#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)

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

#endif /* __KERNEL__ */

#endif /* _ASM_PAGE_H */
Commit	Line	Data
b920de1b DH	1	/* MN10300 Page table definitions
	2	*
	3	* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public Licence
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the Licence, or (at your option) any later version.
	10	*/
	11	#ifndef _ASM_PAGE_H
	12	#define _ASM_PAGE_H
	13
	14	/* PAGE_SHIFT determines the page size */
	15	#define PAGE_SHIFT 12
	16
	17	#ifndef __ASSEMBLY__
	18	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	19	#define PAGE_MASK (~(PAGE_SIZE - 1))
	20	#else
	21	#define PAGE_SIZE +(1 << PAGE_SHIFT) /* unary plus marks an
	22	* immediate val not an addr */
	23	#define PAGE_MASK +(~(PAGE_SIZE - 1))
	24	#endif
	25
	26	#ifdef __KERNEL__
	27	#ifndef __ASSEMBLY__
	28
	29	#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
	30	#define copy_page(to, from) memcpy((void )(to), (void )(from), PAGE_SIZE)
	31
	32	#define clear_user_page(addr, vaddr, page) clear_page(addr)
	33	#define copy_user_page(vto, vfrom, vaddr, to) copy_page(vto, vfrom)
	34
	35	/*
	36	* These are used to make use of C type-checking..
	37	*/
	38	typedef struct { unsigned long pte; } pte_t;
	39	typedef struct { unsigned long pgd; } pgd_t;
	40	typedef struct { unsigned long pgprot; } pgprot_t;
	41	typedef struct page *pgtable_t;
	42
	43	#define PTE_MASK PAGE_MASK
	44	#define HPAGE_SHIFT 22
	45
	46	#ifdef CONFIG_HUGETLB_PAGE
	47	#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
	48	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	49	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
	50	#endif
	51
	52	#define pte_val(x) ((x).pte)
	53	#define pgd_val(x) ((x).pgd)
	54	#define pgprot_val(x) ((x).pgprot)
	55
	56	#define __pte(x) ((pte_t) { (x) })
	57	#define __pgd(x) ((pgd_t) { (x) })
	58	#define __pgprot(x) ((pgprot_t) { (x) })
	59
	60	#include <asm-generic/pgtable-nopmd.h>
	61
	62	#endif /* !__ASSEMBLY__ */
	63
	64	/* to align the pointer to the (next) page boundary */
65	#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
66
67	/*
68	* This handles the memory map.. We could make this a config
69	* option, but too many people screw it up, and too few need
70	* it.
71	*
72	* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
73	* a virtual address space of one gigabyte, which limits the
74	* amount of physical memory you can use to about 950MB.
75	*/
76
77	#ifndef __ASSEMBLY__
78
79	/* Pure 2^n version of get_order */
80	static inline int get_order(unsigned long size) __attribute__((const));
81	static inline int get_order(unsigned long size)
82	{
83	int order;
84
85	size = (size - 1) >> (PAGE_SHIFT - 1);
86	order = -1;
87	do {
88	size >>= 1;
89	order++;
90	} while (size);
91	return order;
92	}
93
94	#endif /* __ASSEMBLY__ */
95
96	#include <asm/page_offset.h>
97
98	#define __PAGE_OFFSET (PAGE_OFFSET_RAW)
99	#define PAGE_OFFSET ((unsigned long) __PAGE_OFFSET)
100
101	/*
102	* main RAM and kernel working space are coincident at 0x90000000, but to make
103	* life more interesting, there's also an uncached virtual shadow at 0xb0000000
104	* - these mappings are fixed in the MMU
105	*/
106	#define __pfn_disp (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT)
107
108	#define __pa(x) ((unsigned long)(x))
109	#define __va(x) ((void *)(unsigned long)(x))
110	#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
111	#define pfn_to_page(pfn) (mem_map + ((pfn) - __pfn_disp))
112	#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + __pfn_disp)
113
114	#define pfn_valid(pfn) \
115	({ \
116	unsigned long __pfn = (pfn) - __pfn_disp; \
117	__pfn < max_mapnr; \
118	})
119
120	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
121	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
122	#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
123
124	#define VM_DATA_DEFAULT_FLAGS \
125	(VM_READ \| VM_WRITE \| \
126	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) \| \
127	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
128
129	#endif /* __KERNEL__ */
130
131	#endif /* _ASM_PAGE_H */