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 | |||
