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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 @@ -/* - * linux/arch/m32r/mm/ioremap.c - * - * Copyright (c) 2001, 2002 Hiroyuki Kondo - * - * Taken from mips version. - * (C) Copyright 1995 1996 Linus Torvalds - * (C) Copyright 2001 Ralf Baechle - */ - -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - */ - -#include <linux/module.h> -#include <asm/addrspace.h> -#include <asm/byteorder.h> - -#include <linux/vmalloc.h> -#include <linux/io.h> -#include <asm/pgalloc.h> - -/* - * Generic mapping function (not visible outside): - */ - -/* - * Remap an arbitrary physical address space into the kernel virtual - * address space. Needed when the kernel wants to access high addresses - * directly. - * - * NOTE! We need to allow non-page-aligned mappings too: we will obviously - * have to convert them into an offset in a page-aligned mapping, but the - * caller shouldn't need to know that small detail. - */ - -#define IS_LOW512(addr) (!((unsigned long)(addr) & ~0x1fffffffUL)) - -void __iomem * -__ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags) -{ - void __iomem * addr; - struct vm_struct * area; - unsigned long offset, last_addr; - pgprot_t pgprot; - - /* Don't allow wraparound or zero size */ - last_addr = phys_addr + size - 1; - if (!size || last_addr < phys_addr) - return NULL; - - /* - * Map objects in the low 512mb of address space using KSEG1, otherwise - * map using page tables. - */ - if (IS_LOW512(phys_addr) && IS_LOW512(phys_addr + size - 1)) - return (void *) KSEG1ADDR(phys_addr); - - /* - * Don't allow anybody to remap normal RAM that we're using.. - */ - if (phys_addr < virt_to_phys(high_memory)) { - char *t_addr, *t_end; - struct page *page; - - t_addr = __va(phys_addr); - t_end = t_addr + (size - 1); - - for(page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++) - if(!PageReserved(page)) - return NULL; - } - - pgprot = __pgprot(_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_READ - | _PAGE_WRITE | flags); - - /* - * Mappings have to be page-aligned - */ - offset = phys_addr & ~PAGE_MASK; - phys_addr &= PAGE_MASK; - size = PAGE_ALIGN(last_addr + 1) - phys_addr; - - /* - * Ok, go for it.. - */ - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - area->phys_addr = phys_addr; - addr = (void __iomem *) area->addr; - if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, - phys_addr, pgprot)) { - vunmap((void __force *) addr); - return NULL; - } - - return (void __iomem *) (offset + (char __iomem *)addr); -} - -#define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == KSEG1) - -void iounmap(volatile void __iomem *addr) -{ - if (!IS_KSEG1(addr)) - vfree((void *) (PAGE_MASK & (unsigned long) addr)); -} - |