diff options
Diffstat (limited to 'arch/sparc/mm/generic_32.c')
-rw-r--r-- | arch/sparc/mm/generic_32.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/arch/sparc/mm/generic_32.c b/arch/sparc/mm/generic_32.c deleted file mode 100644 index 6ca39a60a196..000000000000 --- a/arch/sparc/mm/generic_32.c +++ /dev/null | |||
@@ -1,99 +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/pagemap.h> | ||
12 | #include <linux/export.h> | ||
13 | |||
14 | #include <asm/pgalloc.h> | ||
15 | #include <asm/pgtable.h> | ||
16 | #include <asm/page.h> | ||
17 | #include <asm/cacheflush.h> | ||
18 | #include <asm/tlbflush.h> | ||
19 | |||
20 | /* Remap IO memory, the same way as remap_pfn_range(), but use | ||
21 | * the obio memory space. | ||
22 | * | ||
23 | * They use a pgprot that sets PAGE_IO and does not check the | ||
24 | * mem_map table as this is independent of normal memory. | ||
25 | */ | ||
26 | static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte, unsigned long address, unsigned long size, | ||
27 | unsigned long offset, pgprot_t prot, int space) | ||
28 | { | ||
29 | unsigned long end; | ||
30 | |||
31 | address &= ~PMD_MASK; | ||
32 | end = address + size; | ||
33 | if (end > PMD_SIZE) | ||
34 | end = PMD_SIZE; | ||
35 | do { | ||
36 | set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space)); | ||
37 | address += PAGE_SIZE; | ||
38 | offset += PAGE_SIZE; | ||
39 | pte++; | ||
40 | } while (address < end); | ||
41 | } | ||
42 | |||
43 | static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size, | ||
44 | unsigned long offset, pgprot_t prot, int space) | ||
45 | { | ||
46 | unsigned long end; | ||
47 | |||
48 | address &= ~PGDIR_MASK; | ||
49 | end = address + size; | ||
50 | if (end > PGDIR_SIZE) | ||
51 | end = PGDIR_SIZE; | ||
52 | offset -= address; | ||
53 | do { | ||
54 | pte_t *pte = pte_alloc_map(mm, NULL, pmd, address); | ||
55 | if (!pte) | ||
56 | return -ENOMEM; | ||
57 | io_remap_pte_range(mm, pte, address, end - address, address + offset, prot, space); | ||
58 | address = (address + PMD_SIZE) & PMD_MASK; | ||
59 | pmd++; | ||
60 | } while (address < end); | ||
61 | return 0; | ||
62 | } | ||
63 | |||
64 | int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from, | ||
65 | unsigned long pfn, unsigned long size, pgprot_t prot) | ||
66 | { | ||
67 | int error = 0; | ||
68 | pgd_t * dir; | ||
69 | unsigned long beg = from; | ||
70 | unsigned long end = from + size; | ||
71 | struct mm_struct *mm = vma->vm_mm; | ||
72 | int space = GET_IOSPACE(pfn); | ||
73 | unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT; | ||
74 | |||
75 | /* See comment in mm/memory.c remap_pfn_range */ | ||
76 | vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP; | ||
77 | vma->vm_pgoff = (offset >> PAGE_SHIFT) | | ||
78 | ((unsigned long)space << 28UL); | ||
79 | |||
80 | offset -= from; | ||
81 | dir = pgd_offset(mm, from); | ||
82 | flush_cache_range(vma, beg, end); | ||
83 | |||
84 | while (from < end) { | ||
85 | pmd_t *pmd = pmd_alloc(mm, dir, from); | ||
86 | error = -ENOMEM; | ||
87 | if (!pmd) | ||
88 | break; | ||
89 | error = io_remap_pmd_range(mm, pmd, from, end - from, offset + from, prot, space); | ||
90 | if (error) | ||
91 | break; | ||
92 | from = (from + PGDIR_SIZE) & PGDIR_MASK; | ||
93 | dir++; | ||
94 | } | ||
95 | |||
96 | flush_tlb_range(vma, beg, end); | ||
97 | return error; | ||
98 | } | ||
99 | EXPORT_SYMBOL(io_remap_pfn_range); | ||