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authorPaul Mundt <lethal@linux-sh.org>2007-11-11 18:43:33 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:18:46 +0900
commitad81eb91731fe7e43ce5c91278bc33bded6cbda1 (patch)
tree193e125d6a4cacc3e03732a5ad0e2c372023f7e9 /arch/sh/mm/ioremap.c
parent4b7be4f2e0235c6824641503e2a8ff3b85e105d7 (diff)
downloadlinux-ad81eb91731fe7e43ce5c91278bc33bded6cbda1.tar.bz2
sh: Split out ioremap in to _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/ioremap.c')
-rw-r--r--arch/sh/mm/ioremap.c150
1 files changed, 0 insertions, 150 deletions
diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c
deleted file mode 100644
index 0c7b7e33abdc..000000000000
--- a/arch/sh/mm/ioremap.c
+++ /dev/null
@@ -1,150 +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(unsigned long phys_addr, unsigned long size,
- unsigned long flags)
-{
- 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 on an SH7751 or SH7780 PCI controller, PCI memory is
- * mapped at the end of the address space (typically 0xfd000000)
- * in a non-translatable area, so mapping through page tables for
- * this area 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_memaddr(phys_addr) && is_pci_memaddr(last_addr))
- return (void __iomem *)phys_addr;
-
- /*
- * Don't allow anybody to remap normal RAM that we're using..
- */
- if (phys_addr < virt_to_phys(high_memory))
- return NULL;
-
- /*
- * 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;
- orig_addr = addr = (unsigned long)area->addr;
-
-#ifdef CONFIG_32BIT
- /*
- * 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(size >= 0x1000000)) {
- 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);
-
-void __iounmap(void __iomem *addr)
-{
- unsigned long vaddr = (unsigned long __force)addr;
- struct vm_struct *p;
-
- if (PXSEG(vaddr) < P3SEG || is_pci_memaddr(vaddr))
- return;
-
-#ifdef CONFIG_32BIT
- /*
- * 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", __FUNCTION__, addr);
- return;
- }
-
- kfree(p);
-}
-EXPORT_SYMBOL(__iounmap);