aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--include/asm-xtensa/page.h.n135
1 files changed, 0 insertions, 135 deletions
diff --git a/include/asm-xtensa/page.h.n b/include/asm-xtensa/page.h.n
deleted file mode 100644
index 546cc6624f24..000000000000
--- a/include/asm-xtensa/page.h.n
+++ /dev/null
@@ -1,135 +0,0 @@
1/*
2 * linux/include/asm-xtensa/page.h
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version2 as
6 * published by the Free Software Foundation.
7 *
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
10
11#ifndef _XTENSA_PAGE_H
12#define _XTENSA_PAGE_H
13
14#ifdef __KERNEL__
15
16#include <asm/processor.h>
17#include <linux/config.h>
18
19/*
20 * PAGE_SHIFT determines the page size
21 * PAGE_ALIGN(x) aligns the pointer to the (next) page boundary
22 */
23#define PAGE_SHIFT XCHAL_MMU_MIN_PTE_PAGE_SIZE
24#define PAGE_SIZE (1 << PAGE_SHIFT)
25#define PAGE_MASK (~(PAGE_SIZE-1))
26#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE - 1) & PAGE_MASK)
27
28#define DCACHE_WAY_SIZE (XCHAL_DCACHE_SIZE / XCHAL_DCACHE_WAYS)
29#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
30
31#ifdef __ASSEMBLY__
32
33#define __pgprot(x) (x)
34
35#else
36
37
38/*
39 * These are used to make use of C type-checking..
40 */
41typedef struct { unsigned long pte; } pte_t; /* page table entry */
42typedef struct { unsigned long pmd; } pmd_t; /* PMD table entry */
43typedef struct { unsigned long pgd; } pgd_t; /* PGD table entry */
44typedef struct { unsigned long pgprot; } pgprot_t;
45
46#define pte_val(x) ((x).pte)
47#define pmd_val(x) ((x).pmd)
48#define pgd_val(x) ((x).pgd)
49#define pgprot_val(x) ((x).pgprot)
50
51#define __pte(x) ((pte_t) { (x) } )
52#define __pmd(x) ((pmd_t) { (x) } )
53#define __pgd(x) ((pgd_t) { (x) } )
54#define __pgprot(x) ((pgprot_t) { (x) } )
55
56/*
57 * Pure 2^n version of get_order
58 */
59extern __inline__ int get_order(unsigned long size)
60{
61 int order;
62#ifndef XCHAL_HAVE_NSU
63 unsigned long x1, x2, x4, x8, x16;
64
65 size = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
66 x1 = size & 0xAAAAAAAA;
67 x2 = size & 0xCCCCCCCC;
68 x4 = size & 0xF0F0F0F0;
69 x8 = size & 0xFF00FF00;
70 x16 = size & 0xFFFF0000;
71 order = x2 ? 2 : 0;
72 order += (x16 != 0) * 16;
73 order += (x8 != 0) * 8;
74 order += (x4 != 0) * 4;
75 order += (x1 != 0);
76
77 return order;
78#else
79 size = (size - 1) >> PAGE_SHIFT;
80 asm ("nsau %0, %1" : "=r" (order) : "r" (size));
81 return 32 - order;
82#endif
83}
84
85
86struct page;
87extern void clear_page(void *page);
88extern void copy_page(void *to, void *from);
89
90/*
91 * If we have cache aliasing and writeback caches, we might have to do
92 * some extra work
93 */
94
95#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
96void clear_user_page(void *addr, unsigned long vaddr, struct page* page);
97void copy_user_page(void *to, void* from, unsigned long vaddr, struct page* page);
98#else
99# define clear_user_page(page,vaddr,pg) clear_page(page)
100# define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
101#endif
102
103
104/*
105 * This handles the memory map. We handle pages at
106 * XCHAL_KSEG_CACHED_VADDR for kernels with 32 bit address space.
107 * These macros are for conversion of kernel address, not user
108 * addresses.
109 */
110
111#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
112#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
113#define pfn_valid(pfn) ((unsigned long)pfn < max_mapnr)
114#ifndef CONFIG_DISCONTIGMEM
115# define pfn_to_page(pfn) (mem_map + (pfn))
116# define page_to_pfn(page) ((unsigned long)((page) - mem_map))
117#else
118# error CONFIG_DISCONTIGMEM not supported
119#endif
120
121#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
122#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
123#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
124#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
125
126#define WANT_PAGE_VIRTUAL
127
128
129#endif /* __ASSEMBLY__ */
130
131#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
132 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
133
134#endif /* __KERNEL__ */
135#endif /* _XTENSA_PAGE_H */