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-rw-r--r--arch/sparc/mm/generic_64.c165
1 files changed, 0 insertions, 165 deletions
diff --git a/arch/sparc/mm/generic_64.c b/arch/sparc/mm/generic_64.c
deleted file mode 100644
index 9b357ddae39..00000000000
--- a/arch/sparc/mm/generic_64.c
+++ /dev/null
@@ -1,165 +0,0 @@
1/*
2 * generic.c: Generic Sparc mm routines that are not dependent upon
3 * MMU type but are Sparc specific.
4 *
5 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#include <linux/kernel.h>
9#include <linux/mm.h>
10#include <linux/swap.h>
11#include <linux/export.h>
12#include <linux/pagemap.h>
13
14#include <asm/pgalloc.h>
15#include <asm/pgtable.h>
16#include <asm/page.h>
17#include <asm/tlbflush.h>
18
19/* Remap IO memory, the same way as remap_pfn_range(), but use
20 * the obio memory space.
21 *
22 * They use a pgprot that sets PAGE_IO and does not check the
23 * mem_map table as this is independent of normal memory.
24 */
25static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
26 unsigned long address,
27 unsigned long size,
28 unsigned long offset, pgprot_t prot,
29 int space)
30{
31 unsigned long end;
32
33 /* clear hack bit that was used as a write_combine side-effect flag */
34 offset &= ~0x1UL;
35 address &= ~PMD_MASK;
36 end = address + size;
37 if (end > PMD_SIZE)
38 end = PMD_SIZE;
39 do {
40 pte_t entry;
41 unsigned long curend = address + PAGE_SIZE;
42
43 entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
44 if (!(address & 0xffff)) {
45 if (PAGE_SIZE < (4 * 1024 * 1024) &&
46 !(address & 0x3fffff) &&
47 !(offset & 0x3ffffe) &&
48 end >= address + 0x400000) {
49 entry = mk_pte_io(offset, prot, space,
50 4 * 1024 * 1024);
51 curend = address + 0x400000;
52 offset += 0x400000;
53 } else if (PAGE_SIZE < (512 * 1024) &&
54 !(address & 0x7ffff) &&
55 !(offset & 0x7fffe) &&
56 end >= address + 0x80000) {
57 entry = mk_pte_io(offset, prot, space,
58 512 * 1024 * 1024);
59 curend = address + 0x80000;
60 offset += 0x80000;
61 } else if (PAGE_SIZE < (64 * 1024) &&
62 !(offset & 0xfffe) &&
63 end >= address + 0x10000) {
64 entry = mk_pte_io(offset, prot, space,
65 64 * 1024);
66 curend = address + 0x10000;
67 offset += 0x10000;
68 } else
69 offset += PAGE_SIZE;
70 } else
71 offset += PAGE_SIZE;
72
73 if (pte_write(entry))
74 entry = pte_mkdirty(entry);
75 do {
76 BUG_ON(!pte_none(*pte));
77 set_pte_at(mm, address, pte, entry);
78 address += PAGE_SIZE;
79 pte_val(entry) += PAGE_SIZE;
80 pte++;
81 } while (address < curend);
82 } while (address < end);
83}
84
85static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size,
86 unsigned long offset, pgprot_t prot, int space)
87{
88 unsigned long end;
89
90 address &= ~PGDIR_MASK;
91 end = address + size;
92 if (end > PGDIR_SIZE)
93 end = PGDIR_SIZE;
94 offset -= address;
95 do {
96 pte_t *pte = pte_alloc_map(mm, NULL, pmd, address);
97 if (!pte)
98 return -ENOMEM;
99 io_remap_pte_range(mm, pte, address, end - address, address + offset, prot, space);
100 pte_unmap(pte);
101 address = (address + PMD_SIZE) & PMD_MASK;
102 pmd++;
103 } while (address < end);
104 return 0;
105}
106
107static inline int io_remap_pud_range(struct mm_struct *mm, pud_t * pud, unsigned long address, unsigned long size,
108 unsigned long offset, pgprot_t prot, int space)
109{
110 unsigned long end;
111
112 address &= ~PUD_MASK;
113 end = address + size;
114 if (end > PUD_SIZE)
115 end = PUD_SIZE;
116 offset -= address;
117 do {
118 pmd_t *pmd = pmd_alloc(mm, pud, address);
119 if (!pud)
120 return -ENOMEM;
121 io_remap_pmd_range(mm, pmd, address, end - address, address + offset, prot, space);
122 address = (address + PUD_SIZE) & PUD_MASK;
123 pud++;
124 } while (address < end);
125 return 0;
126}
127
128int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
129 unsigned long pfn, unsigned long size, pgprot_t prot)
130{
131 int error = 0;
132 pgd_t * dir;
133 unsigned long beg = from;
134 unsigned long end = from + size;
135 struct mm_struct *mm = vma->vm_mm;
136 int space = GET_IOSPACE(pfn);
137 unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
138 unsigned long phys_base;
139
140 phys_base = offset | (((unsigned long) space) << 32UL);
141
142 /* See comment in mm/memory.c remap_pfn_range */
143 vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
144 vma->vm_pgoff = phys_base >> PAGE_SHIFT;
145
146 offset -= from;
147 dir = pgd_offset(mm, from);
148 flush_cache_range(vma, beg, end);
149
150 while (from < end) {
151 pud_t *pud = pud_alloc(mm, dir, from);
152 error = -ENOMEM;
153 if (!pud)
154 break;
155 error = io_remap_pud_range(mm, pud, from, end - from, offset + from, prot, space);
156 if (error)
157 break;
158 from = (from + PGDIR_SIZE) & PGDIR_MASK;
159 dir++;
160 }
161
162 flush_tlb_range(vma, beg, end);
163 return error;
164}
165EXPORT_SYMBOL(io_remap_pfn_range);
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