mmu-y := nommu.o extable_32.o
mmu-$(CONFIG_MMU) := extable_$(BITS).o fault_$(BITS).o \
- ioremap_$(BITS).o kmap.o pgtable.o tlbflush_$(BITS).o
+ ioremap.o kmap.o pgtable.o tlbflush_$(BITS).o
obj-y += $(mmu-y)
obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
--- /dev/null
+/*
+ * arch/sh/mm/ioremap.c
+ *
+ * (C) Copyright 1995 1996 Linus Torvalds
+ * (C) Copyright 2005 - 2010 Paul Mundt
+ *
+ * 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
+ *
+ * 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;
+
+ /*
+ * If we can't yet use the regular approach, go the fixmap route.
+ */
+ if (!mem_init_done)
+ return ioremap_fixed(phys_addr, size, __pgprot(flags));
+
+ /*
+ * 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);
+
+/*
+ * Simple checks for non-translatable mappings.
+ */
+static inline int iomapping_nontranslatable(unsigned long offset)
+{
+#ifdef CONFIG_29BIT
+ /*
+ * In 29-bit mode this includes the fixed P1/P2 areas, as well as
+ * parts of P3.
+ */
+ if (PXSEG(offset) < P3SEG || offset >= P3_ADDR_MAX)
+ return 1;
+#endif
+
+ if (is_pci_memory_fixed_range(offset, 0))
+ return 1;
+
+ return 0;
+}
+
+void __iounmap(void __iomem *addr)
+{
+ unsigned long vaddr = (unsigned long __force)addr;
+ struct vm_struct *p;
+
+ /*
+ * Nothing to do if there is no translatable mapping.
+ */
+ if (iomapping_nontranslatable(vaddr))
+ 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);
+++ /dev/null
-/*
- * arch/sh/mm/ioremap.c
- *
- * (C) Copyright 1995 1996 Linus Torvalds
- * (C) Copyright 2005 - 2010 Paul Mundt
- *
- * 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
- *
- * 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;
-
- /*
- * If we can't yet use the regular approach, go the fixmap route.
- */
- if (!mem_init_done)
- return ioremap_fixed(phys_addr, size, __pgprot(flags));
-
- /*
- * 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);
-
-/*
- * Simple checks for non-translatable mappings.
- */
-static inline int iomapping_nontranslatable(unsigned long offset)
-{
-#ifdef CONFIG_29BIT
- /*
- * In 29-bit mode this includes the fixed P1/P2 areas, as well as
- * parts of P3.
- */
- if (PXSEG(offset) < P3SEG || offset >= P3_ADDR_MAX)
- return 1;
-#endif
-
- if (is_pci_memory_fixed_range(offset, 0))
- return 1;
-
- return 0;
-}
-
-void __iounmap(void __iomem *addr)
-{
- unsigned long vaddr = (unsigned long __force)addr;
- struct vm_struct *p;
-
- /*
- * Nothing to do if there is no translatable mapping.
- */
- if (iomapping_nontranslatable(vaddr))
- 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);
+++ /dev/null
-/*
- * arch/sh/mm/ioremap_64.c
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- * Copyright (C) 2003 - 2007 Paul Mundt
- *
- * Mostly derived from arch/sh/mm/ioremap.c which, in turn is mostly
- * derived from arch/i386/mm/ioremap.c .
- *
- * (C) Copyright 1995 1996 Linus Torvalds
- *
- * 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/ioport.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-#include <linux/bootmem.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.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>
-
-void __iomem *__ioremap_caller(unsigned long offset, unsigned long size,
- unsigned long flags, void *caller)
-{
- pgprot_t prot;
-
- prot = __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE |
- _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SHARED | flags);
-
- return ioremap_fixed(offset, size, prot);
-}
-EXPORT_SYMBOL(__ioremap_caller);
-
-void __iounmap(void __iomem *virtual)
-{
- iounmap_fixed(virtual);
-}
-EXPORT_SYMBOL(__iounmap);
projects / firefly-linux-kernel-4.4.55.git / commitdiff