diff options
Diffstat (limited to 'arch/sh/mm/ioremap_32.c')
| -rw-r--r-- | arch/sh/mm/ioremap_32.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/arch/sh/mm/ioremap_32.c b/arch/sh/mm/ioremap_32.c deleted file mode 100644 index 2141befb4f9..00000000000 --- a/arch/sh/mm/ioremap_32.c +++ /dev/null @@ -1,145 +0,0 @@ -/* - * arch/sh/mm/ioremap.c - * - * Re-map IO memory to kernel address space so that we can access it. - * This is needed for high PCI addresses that aren't mapped in the - * 640k-1MB IO memory area on PC's - * - * (C) Copyright 1995 1996 Linus Torvalds - * (C) Copyright 2005, 2006 Paul Mundt - * - * 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/vmalloc.h> -#include <linux/module.h> -#include <linux/mm.h> -#include <linux/pci.h> -#include <linux/io.h> -#include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/addrspace.h> -#include <asm/cacheflush.h> -#include <asm/tlbflush.h> -#include <asm/mmu.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_caller(unsigned long phys_addr, unsigned long size, - unsigned long flags, void *caller) -{ - struct vm_struct *area; - unsigned long offset, last_addr, addr, orig_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; - - /* - * If we're in the fixed PCI memory range, mapping through page - * tables is not only pointless, but also fundamentally broken. - * Just return the physical address instead. - * - * For boards that map a small PCI memory aperture somewhere in - * P1/P2 space, ioremap() will already do the right thing, - * and we'll never get this far. - */ - if (is_pci_memory_fixed_range(phys_addr, size)) - return (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; - - /* - * Ok, go for it.. - */ - area = get_vm_area_caller(size, VM_IOREMAP, caller); - if (!area) - return NULL; - area->phys_addr = phys_addr; - orig_addr = addr = (unsigned long)area->addr; - -#ifdef CONFIG_PMB - /* - * First try to remap through the PMB once a valid VMA has been - * established. Smaller allocations (or the rest of the size - * remaining after a PMB mapping due to the size not being - * perfectly aligned on a PMB size boundary) are then mapped - * through the UTLB using conventional page tables. - * - * PMB entries are all pre-faulted. - */ - if (unlikely(phys_addr >= P1SEG)) { - unsigned long mapped = pmb_remap(addr, phys_addr, size, flags); - - if (likely(mapped)) { - addr += mapped; - phys_addr += mapped; - size -= mapped; - } - } -#endif - - pgprot = __pgprot(pgprot_val(PAGE_KERNEL_NOCACHE) | flags); - if (likely(size)) - if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) { - vunmap((void *)orig_addr); - return NULL; - } - - return (void __iomem *)(offset + (char *)orig_addr); -} -EXPORT_SYMBOL(__ioremap_caller); - -void __iounmap(void __iomem *addr) -{ - unsigned long vaddr = (unsigned long __force)addr; - unsigned long seg = PXSEG(vaddr); - struct vm_struct *p; - - if (seg < P3SEG || vaddr >= P3_ADDR_MAX) - return; - if (is_pci_memory_fixed_range(vaddr, 0)) - return; - -#ifdef CONFIG_PMB - /* - * Purge any PMB entries that may have been established for this - * mapping, then proceed with conventional VMA teardown. - * - * XXX: Note that due to the way that remove_vm_area() does - * matching of the resultant VMA, we aren't able to fast-forward - * the address past the PMB space until the end of the VMA where - * the page tables reside. As such, unmap_vm_area() will be - * forced to linearly scan over the area until it finds the page - * tables where PTEs that need to be unmapped actually reside, - * which is far from optimal. Perhaps we need to use a separate - * VMA for the PMB mappings? - * -- PFM. - */ - pmb_unmap(vaddr); -#endif - - p = remove_vm_area((void *)(vaddr & PAGE_MASK)); - if (!p) { - printk(KERN_ERR "%s: bad address %p\n", __func__, addr); - return; - } - - kfree(p); -} -EXPORT_SYMBOL(__iounmap); |