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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_SH_PAGE_H
2#define __ASM_SH_PAGE_H
3
4/*
5 * Copyright (C) 1999 Niibe Yutaka
6 */
7
Stuart Menefyd02b08f2007-11-30 17:52:53 +09008#include <linux/const.h>
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010/* PAGE_SHIFT determines the page size */
Paul Mundt21440cf2006-11-20 14:30:26 +090011#if defined(CONFIG_PAGE_SIZE_4KB)
12# define PAGE_SHIFT 12
13#elif defined(CONFIG_PAGE_SIZE_8KB)
14# define PAGE_SHIFT 13
Paul Mundt66dfe182008-06-03 18:54:02 +090015#elif defined(CONFIG_PAGE_SIZE_16KB)
16# define PAGE_SHIFT 14
Paul Mundt21440cf2006-11-20 14:30:26 +090017#elif defined(CONFIG_PAGE_SIZE_64KB)
18# define PAGE_SHIFT 16
19#else
20# error "Bogus kernel page size?"
21#endif
Paul Mundt8c12b5d2006-09-27 18:31:06 +090022
Stuart Menefyd02b08f2007-11-30 17:52:53 +090023#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#define PAGE_MASK (~(PAGE_SIZE-1))
25#define PTE_MASK PAGE_MASK
26
27#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
28#define HPAGE_SHIFT 16
Paul Mundt21440cf2006-11-20 14:30:26 +090029#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
30#define HPAGE_SHIFT 18
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
32#define HPAGE_SHIFT 20
Paul Mundt21440cf2006-11-20 14:30:26 +090033#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
34#define HPAGE_SHIFT 22
35#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
36#define HPAGE_SHIFT 26
Paul Mundtcaff44e2007-11-21 15:23:07 +090037#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
38#define HPAGE_SHIFT 29
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#endif
40
41#ifdef CONFIG_HUGETLB_PAGE
42#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
43#define HPAGE_MASK (~(HPAGE_SIZE-1))
44#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#endif
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#ifndef __ASSEMBLY__
Paul Mundtd01447b2010-02-18 18:13:51 +090048#include <asm/uncached.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Paul Mundtf3c25752006-09-27 18:36:17 +090050extern unsigned long shm_align_mask;
Paul Mundt01066622007-03-28 16:38:13 +090051extern unsigned long max_low_pfn, min_low_pfn;
Paul Mundt5e2ff322010-05-10 20:17:25 +090052extern unsigned long memory_start, memory_end, memory_limit;
Paul Mundtf3c25752006-09-27 18:36:17 +090053
Paul Mundt2277ab42009-07-22 19:20:49 +090054static inline unsigned long
55pages_do_alias(unsigned long addr1, unsigned long addr2)
56{
57 return (addr1 ^ addr2) & shm_align_mask;
58}
59
Paul Mundtdfff0fa2009-07-27 20:53:22 +090060#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
Paul Mundt379a95d2007-11-20 16:51:28 +090061extern void copy_page(void *to, void *from);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Paul Mundtdfff0fa2009-07-27 20:53:22 +090063struct page;
64struct vm_area_struct;
65
Paul Mundt7747b9a2007-11-05 16:12:32 +090066extern void copy_user_highpage(struct page *to, struct page *from,
67 unsigned long vaddr, struct vm_area_struct *vma);
68#define __HAVE_ARCH_COPY_USER_HIGHPAGE
Paul Mundtdfff0fa2009-07-27 20:53:22 +090069extern void clear_user_highpage(struct page *page, unsigned long vaddr);
70#define clear_user_highpage clear_user_highpage
Paul Mundt0dfae7d2009-07-27 21:30:17 +090071
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/*
73 * These are used to make use of C type-checking..
74 */
Paul Mundt21440cf2006-11-20 14:30:26 +090075#ifdef CONFIG_X2TLB
76typedef struct { unsigned long pte_low, pte_high; } pte_t;
77typedef struct { unsigned long long pgprot; } pgprot_t;
Paul Mundtd04a0f72007-09-21 11:55:03 +090078typedef struct { unsigned long long pgd; } pgd_t;
Paul Mundt21440cf2006-11-20 14:30:26 +090079#define pte_val(x) \
80 ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
81#define __pte(x) \
82 ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
Paul Mundt249cfea2007-11-19 18:26:19 +090083#elif defined(CONFIG_SUPERH32)
Paul Mundt21440cf2006-11-20 14:30:26 +090084typedef struct { unsigned long pte_low; } pte_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085typedef struct { unsigned long pgprot; } pgprot_t;
Paul Mundtd04a0f72007-09-21 11:55:03 +090086typedef struct { unsigned long pgd; } pgd_t;
Paul Mundt21440cf2006-11-20 14:30:26 +090087#define pte_val(x) ((x).pte_low)
Paul Mundt249cfea2007-11-19 18:26:19 +090088#define __pte(x) ((pte_t) { (x) } )
89#else
90typedef struct { unsigned long long pte_low; } pte_t;
Matt Fleming24ef7fc2009-11-19 21:11:05 +000091typedef struct { unsigned long long pgprot; } pgprot_t;
Paul Mundt249cfea2007-11-19 18:26:19 +090092typedef struct { unsigned long pgd; } pgd_t;
93#define pte_val(x) ((x).pte_low)
94#define __pte(x) ((pte_t) { (x) } )
Paul Mundt21440cf2006-11-20 14:30:26 +090095#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#define pgd_val(x) ((x).pgd)
98#define pgprot_val(x) ((x).pgprot)
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define __pgd(x) ((pgd_t) { (x) } )
101#define __pgprot(x) ((pgprot_t) { (x) } )
102
Martin Schwidefsky2f569af2008-02-08 04:22:04 -0800103typedef struct page *pgtable_t;
104
Paul Mundtcb700aa2008-09-12 20:41:05 +0900105#define pte_pgprot(x) __pgprot(pte_val(x) & PTE_FLAGS_MASK)
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#endif /* !__ASSEMBLY__ */
108
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900109/*
110 * __MEMORY_START and SIZE are the physical addresses and size of RAM.
111 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112#define __MEMORY_START CONFIG_MEMORY_START
113#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900115/*
Simon Hormane66ac3f2011-09-15 20:13:00 +0900116 * PHYSICAL_OFFSET is the offset in physical memory where the base
117 * of the kernel is loaded.
118 */
119#ifdef CONFIG_PHYSICAL_START
120#define PHYSICAL_OFFSET (CONFIG_PHYSICAL_START - __MEMORY_START)
121#else
122#define PHYSICAL_OFFSET 0
123#endif
124
125/*
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900126 * PAGE_OFFSET is the virtual address of the start of kernel address
127 * space.
128 */
Paul Mundte7f93a32006-09-27 17:19:13 +0900129#define PAGE_OFFSET CONFIG_PAGE_OFFSET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900131/*
132 * Virtual to physical RAM address translation.
133 *
134 * In 29 bit mode, the physical offset of RAM from address 0 is visible in
135 * the kernel virtual address space, and thus we don't have to take
136 * this into account when translating. However in 32 bit mode this offset
137 * is not visible (it is part of the PMB mapping) and so needs to be
138 * added or subtracted as required.
139 */
Paul Mundt1d5cfcd2010-02-16 21:43:38 +0900140#ifdef CONFIG_PMB
Matt Fleming7c4584d2010-04-24 11:12:12 +0100141#define ___pa(x) ((x)-PAGE_OFFSET+__MEMORY_START)
142#define ___va(x) ((x)+PAGE_OFFSET-__MEMORY_START)
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900143#else
Matt Fleming7c4584d2010-04-24 11:12:12 +0100144#define ___pa(x) ((x)-PAGE_OFFSET)
145#define ___va(x) ((x)+PAGE_OFFSET)
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900146#endif
147
Matt Fleming7c4584d2010-04-24 11:12:12 +0100148#ifndef __ASSEMBLY__
149#define __pa(x) ___pa((unsigned long)x)
150#define __va(x) (void *)___va((unsigned long)x)
151#endif /* !__ASSEMBLY__ */
152
Paul Mundt9edef282010-02-17 16:28:00 +0900153#ifdef CONFIG_UNCACHED_MAPPING
Nobuhiro Iwamatsudfd3b592011-11-04 22:13:50 +0900154#if defined(CONFIG_29BIT)
155#define UNCAC_ADDR(addr) P2SEGADDR(addr)
156#define CAC_ADDR(addr) P1SEGADDR(addr)
157#else
Paul Mundt9edef282010-02-17 16:28:00 +0900158#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + uncached_start)
159#define CAC_ADDR(addr) ((addr) - uncached_start + PAGE_OFFSET)
Nobuhiro Iwamatsudfd3b592011-11-04 22:13:50 +0900160#endif
Paul Mundt9edef282010-02-17 16:28:00 +0900161#else
162#define UNCAC_ADDR(addr) ((addr))
163#define CAC_ADDR(addr) ((addr))
164#endif
165
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900166#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
Paul Mundt01066622007-03-28 16:38:13 +0900167#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Stuart Menefyd02b08f2007-11-30 17:52:53 +0900169/*
170 * PFN = physical frame number (ie PFN 0 == physical address 0)
171 * PFN_START is the PFN of the first page of RAM. By defining this we
172 * don't have struct page entries for the portion of address space
173 * between physical address 0 and the start of RAM.
174 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
Alexey Dobriyan67bb2c62006-09-08 09:47:34 -0700176#define ARCH_PFN_OFFSET (PFN_START)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
Paul Mundt59007112007-05-23 17:40:56 +0900178#ifdef CONFIG_FLATMEM
Paul Mundt01066622007-03-28 16:38:13 +0900179#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
Paul Mundt59007112007-05-23 17:40:56 +0900180#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
182
183#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
184 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
185
KAMEZAWA Hiroyuki104b8de2006-03-27 01:15:46 -0800186#include <asm-generic/memory_model.h>
Arnd Bergmann5b17e1c2009-05-13 22:56:30 +0000187#include <asm-generic/getorder.h>
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -0700188
Paul Mundt19f9a342006-09-27 18:33:49 +0900189/* vDSO support */
190#ifdef CONFIG_VSYSCALL
191#define __HAVE_ARCH_GATE_AREA
192#endif
193
Paul Mundtcbd2d9d2007-06-04 15:46:56 +0900194/*
Paul Mundt66d485b2007-11-27 15:57:30 +0900195 * Some drivers need to perform DMA into kmalloc'ed buffers
196 * and so we have to increase the kmalloc minalign for this.
Paul Mundtcbd2d9d2007-06-04 15:46:56 +0900197 */
FUJITA Tomonoria6eb9fe2010-08-10 18:03:22 -0700198#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
Paul Mundt01fed932007-11-10 19:57:58 +0900199
Paul Mundt66d485b2007-11-27 15:57:30 +0900200#ifdef CONFIG_SUPERH64
Paul Mundt01fed932007-11-10 19:57:58 +0900201/*
Paul Mundt66d485b2007-11-27 15:57:30 +0900202 * While BYTES_PER_WORD == 4 on the current sh64 ABI, GCC will still
203 * happily generate {ld/st}.q pairs, requiring us to have 8-byte
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300204 * alignment to avoid traps. The kmalloc alignment is guaranteed by
Paul Mundt66d485b2007-11-27 15:57:30 +0900205 * virtue of L1_CACHE_BYTES, requiring this to only be special cased
206 * for slab caches.
Paul Mundt01fed932007-11-10 19:57:58 +0900207 */
208#define ARCH_SLAB_MINALIGN 8
209#endif
Paul Mundtcbd2d9d2007-06-04 15:46:56 +0900210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211#endif /* __ASM_SH_PAGE_H */