diff options
Diffstat (limited to 'arch/metag/mm/ioremap.c')
-rw-r--r-- | arch/metag/mm/ioremap.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/arch/metag/mm/ioremap.c b/arch/metag/mm/ioremap.c deleted file mode 100644 index df2b59cb02eb..000000000000 --- a/arch/metag/mm/ioremap.c +++ /dev/null @@ -1,90 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Re-map IO memory to kernel address space so that we can access it. - * Needed for memory-mapped I/O devices mapped outside our normal DRAM - * window (that is, all memory-mapped I/O devices). - * - * Copyright (C) 1995,1996 Linus Torvalds - * - * Meta port based on CRIS-port by Axis Communications AB - */ - -#include <linux/vmalloc.h> -#include <linux/io.h> -#include <linux/export.h> -#include <linux/slab.h> -#include <linux/mm.h> - -#include <asm/pgtable.h> - -/* - * 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. - */ -void __iomem *__ioremap(unsigned long phys_addr, size_t size, - unsigned long flags) -{ - unsigned long addr; - struct vm_struct *area; - unsigned long offset, last_addr; - pgprot_t prot; - - /* Don't allow wraparound or zero size */ - last_addr = phys_addr + size - 1; - if (!size || last_addr < phys_addr) - return NULL; - - /* Custom region addresses are accessible and uncached by default. */ - if (phys_addr >= LINSYSCUSTOM_BASE && - phys_addr < (LINSYSCUSTOM_BASE + LINSYSCUSTOM_LIMIT)) - return (__force void __iomem *) phys_addr; - - /* - * Mappings have to be page-aligned - */ - offset = phys_addr & ~PAGE_MASK; - phys_addr &= PAGE_MASK; - size = PAGE_ALIGN(last_addr+1) - phys_addr; - prot = __pgprot(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_DIRTY | - _PAGE_ACCESSED | _PAGE_KERNEL | _PAGE_CACHE_WIN0 | - flags); - - /* - * Ok, go for it.. - */ - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - area->phys_addr = phys_addr; - addr = (unsigned long) area->addr; - if (ioremap_page_range(addr, addr + size, phys_addr, prot)) { - vunmap((void *) addr); - return NULL; - } - return (__force void __iomem *) (offset + (char *)addr); -} -EXPORT_SYMBOL(__ioremap); - -void __iounmap(void __iomem *addr) -{ - struct vm_struct *p; - - if ((__force unsigned long)addr >= LINSYSCUSTOM_BASE && - (__force unsigned long)addr < (LINSYSCUSTOM_BASE + - LINSYSCUSTOM_LIMIT)) - return; - - p = remove_vm_area((void *)(PAGE_MASK & (unsigned long __force)addr)); - if (unlikely(!p)) { - pr_err("iounmap: bad address %p\n", addr); - return; - } - - kfree(p); -} -EXPORT_SYMBOL(__iounmap); |