diff options
Diffstat (limited to 'arch/m32r/mm/ioremap.c')
-rw-r--r-- | arch/m32r/mm/ioremap.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/arch/m32r/mm/ioremap.c b/arch/m32r/mm/ioremap.c deleted file mode 100644 index 5152c4e6ac80..000000000000 --- a/arch/m32r/mm/ioremap.c +++ /dev/null | |||
@@ -1,111 +0,0 @@ | |||
1 | /* | ||
2 | * linux/arch/m32r/mm/ioremap.c | ||
3 | * | ||
4 | * Copyright (c) 2001, 2002 Hiroyuki Kondo | ||
5 | * | ||
6 | * Taken from mips version. | ||
7 | * (C) Copyright 1995 1996 Linus Torvalds | ||
8 | * (C) Copyright 2001 Ralf Baechle | ||
9 | */ | ||
10 | |||
11 | /* | ||
12 | * This file is subject to the terms and conditions of the GNU General Public | ||
13 | * License. See the file "COPYING" in the main directory of this archive | ||
14 | * for more details. | ||
15 | * | ||
16 | */ | ||
17 | |||
18 | #include <linux/module.h> | ||
19 | #include <asm/addrspace.h> | ||
20 | #include <asm/byteorder.h> | ||
21 | |||
22 | #include <linux/vmalloc.h> | ||
23 | #include <linux/io.h> | ||
24 | #include <asm/pgalloc.h> | ||
25 | |||
26 | /* | ||
27 | * Generic mapping function (not visible outside): | ||
28 | */ | ||
29 | |||
30 | /* | ||
31 | * Remap an arbitrary physical address space into the kernel virtual | ||
32 | * address space. Needed when the kernel wants to access high addresses | ||
33 | * directly. | ||
34 | * | ||
35 | * NOTE! We need to allow non-page-aligned mappings too: we will obviously | ||
36 | * have to convert them into an offset in a page-aligned mapping, but the | ||
37 | * caller shouldn't need to know that small detail. | ||
38 | */ | ||
39 | |||
40 | #define IS_LOW512(addr) (!((unsigned long)(addr) & ~0x1fffffffUL)) | ||
41 | |||
42 | void __iomem * | ||
43 | __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags) | ||
44 | { | ||
45 | void __iomem * addr; | ||
46 | struct vm_struct * area; | ||
47 | unsigned long offset, last_addr; | ||
48 | pgprot_t pgprot; | ||
49 | |||
50 | /* Don't allow wraparound or zero size */ | ||
51 | last_addr = phys_addr + size - 1; | ||
52 | if (!size || last_addr < phys_addr) | ||
53 | return NULL; | ||
54 | |||
55 | /* | ||
56 | * Map objects in the low 512mb of address space using KSEG1, otherwise | ||
57 | * map using page tables. | ||
58 | */ | ||
59 | if (IS_LOW512(phys_addr) && IS_LOW512(phys_addr + size - 1)) | ||
60 | return (void *) KSEG1ADDR(phys_addr); | ||
61 | |||
62 | /* | ||
63 | * Don't allow anybody to remap normal RAM that we're using.. | ||
64 | */ | ||
65 | if (phys_addr < virt_to_phys(high_memory)) { | ||
66 | char *t_addr, *t_end; | ||
67 | struct page *page; | ||
68 | |||
69 | t_addr = __va(phys_addr); | ||
70 | t_end = t_addr + (size - 1); | ||
71 | |||
72 | for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++) | ||
73 | if(!PageReserved(page)) | ||
74 | return NULL; | ||
75 | } | ||
76 | |||
77 | pgprot = __pgprot(_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_READ | ||
78 | | _PAGE_WRITE | flags); | ||
79 | |||
80 | /* | ||
81 | * Mappings have to be page-aligned | ||
82 | */ | ||
83 | offset = phys_addr & ~PAGE_MASK; | ||
84 | phys_addr &= PAGE_MASK; | ||
85 | size = PAGE_ALIGN(last_addr + 1) - phys_addr; | ||
86 | |||
87 | /* | ||
88 | * Ok, go for it.. | ||
89 | */ | ||
90 | area = get_vm_area(size, VM_IOREMAP); | ||
91 | if (!area) | ||
92 | return NULL; | ||
93 | area->phys_addr = phys_addr; | ||
94 | addr = (void __iomem *) area->addr; | ||
95 | if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, | ||
96 | phys_addr, pgprot)) { | ||
97 | vunmap((void __force *) addr); | ||
98 | return NULL; | ||
99 | } | ||
100 | |||
101 | return (void __iomem *) (offset + (char __iomem *)addr); | ||
102 | } | ||
103 | |||
104 | #define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == KSEG1) | ||
105 | |||
106 | void iounmap(volatile void __iomem *addr) | ||
107 | { | ||
108 | if (!IS_KSEG1(addr)) | ||
109 | vfree((void *) (PAGE_MASK & (unsigned long) addr)); | ||
110 | } | ||
111 | |||