1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* linux/include/asm-m68k/cf_page.h
*
* Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Based on linux/include/asm-m68k/page.h
*
* 10/09/08 JKM: split Coldfire pieces into separate file
*/
#ifndef __CF_PAGE__
#define __CF_PAGE__
#include <linux/const.h>
#include <asm/setup.h>
#include <asm/page_offset.h>
/* Virtual base page location */
#define PAGE_OFFSET (PAGE_OFFSET_RAW)
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT (13) /* 8K pages */
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define THREAD_SIZE PAGE_SIZE
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
#include <asm/module.h>
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
#define free_user_page(page, addr) free_page(addr)
#define clear_page(page) memset((page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
#define clear_user_page(addr, vaddr, page) \
do { clear_page(addr); \
flush_dcache_page(page); \
} while (0)
#define copy_user_page(to, from, vaddr, page) \
do { copy_page(to, from); \
flush_dcache_page(page); \
} while (0)
/*
* These are used to make use of C type-checking..
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((&x)->pmd[0])
#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) } )
/* to align the pointer to the (next) page boundary */
/*Defined in linux/mm.h*/
/*#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)*/
extern unsigned long m68k_memoffset;
#define WANT_PAGE_VIRTUAL
extern unsigned long cf_dma_base;
extern unsigned long cf_dma_end;
/*
* Convert a virt to a phys
*/
static inline unsigned long ___pa(void *vaddr)
{
#if CONFIG_SDRAM_BASE != PAGE_OFFSET
return (((unsigned long)vaddr & 0x0fffffff) + CONFIG_SDRAM_BASE);
#else
if ((unsigned long)vaddr >= CONFIG_DMA_BASE &&
(unsigned long)vaddr < (CONFIG_DMA_BASE + CONFIG_DMA_SIZE)) {
/* address is in carved out DMA range */
return ((unsigned long)vaddr - CONFIG_DMA_BASE) + CONFIG_SDRAM_BASE;
}
else if ((unsigned long)vaddr >= PAGE_OFFSET &&
(unsigned long)vaddr < (PAGE_OFFSET + CONFIG_SDRAM_SIZE)) {
/* normal mapping */
return ((unsigned long)vaddr - PAGE_OFFSET) + CONFIG_SDRAM_BASE;
}
return (unsigned long)vaddr;
#endif
}
#define __pa(vaddr) ___pa((void *)(vaddr))
/*
* Convert a phys to a virt
*/
static inline void *__va(unsigned long paddr)
{
#if CONFIG_SDRAM_BASE != PAGE_OFFSET
return (void *)((paddr & 0x0fffffff) + PAGE_OFFSET);
#else
if (paddr >= cf_dma_base && paddr <= cf_dma_end) {
/* mapped address for DMA */
return (void *)((paddr - CONFIG_SDRAM_BASE) + CONFIG_DMA_BASE);
}
else if (paddr >= cf_dma_end &&
paddr < (CONFIG_SDRAM_BASE + CONFIG_SDRAM_SIZE)) {
/* normal mapping */
return (void *)((paddr - CONFIG_SDRAM_BASE) + PAGE_OFFSET);
}
return (void *)paddr;
#endif
}
/*
* NOTE: virtual isn't really correct, actually it should be the offset into the
* memory node, but we have no highmem, so that works for now.
*
* TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
* of the shifts unnecessary.
*
* PFNs are used to map physical pages. So PFN[0] maps to the base phys addr.
*/
#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
extern int m68k_virt_to_node_shift;
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
#define __virt_to_node(addr) (&pg_data_map[0])
#else
extern struct pglist_data *pg_data_table[];
static inline __attribute_const__ int __virt_to_node_shift(void)
{
return m68k_virt_to_node_shift;
}
#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
#endif /* !CONFIG_SINGLE_MEMORY_CHUNK */
#define virt_to_page(addr) ({ \
pfn_to_page(virt_to_pfn(addr)); \
})
#define page_to_virt(page) ({ \
pfn_to_virt(page_to_pfn(page)); \
})
#define pfn_to_page(pfn) ({ \
unsigned long __pfn = (pfn); \
struct pglist_data *pgdat; \
pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \
pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \
})
#define page_to_pfn(_page) ({ \
struct page *__p = (_page); \
struct pglist_data *pgdat; \
pgdat = &pg_data_map[page_to_nid(__p)]; \
((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
})
#define virt_addr_valid(kaddr) ( ((void *)(kaddr) >= (void *)PAGE_OFFSET && \
(void *)(kaddr) < high_memory) || \
((void *)(kaddr) >= (void*)CONFIG_DMA_BASE && \
(void *)(kaddr) < (void*)(CONFIG_DMA_BASE+CONFIG_DMA_SIZE)))
#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/getorder.h>
#ifdef CONFIG_VDSO
#define __HAVE_ARCH_GATE_AREA
#endif
#endif /* __CF_PAGE__ */
|
