/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/slab.h>

#include <asm/pgtable.h>
#include <asm/addrspace.h>

/*
 * Re-map an arbitrary physical address space into the kernel virtual
 * address space. Needed when the kernel wants to access physical
 * memory directly.
 */
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;

	/*
	 * Check if we can simply use the P4 segment. This area is
	 * uncacheable, so if caching/buffering is requested, we can't
	 * use it.
	 */
	if ((phys_addr >= P4SEG) && (flags == 0))
		return (void __iomem *)phys_addr;

	/* Don't allow wraparound or zero size */
	last_addr = phys_addr + size - 1;
	if (!size || last_addr < phys_addr)
		return NULL;

	/*
	 * XXX: When mapping regular RAM, we'd better make damn sure
	 * it's never used for anything else.  But this is really the
	 * caller's responsibility...
	 */
	if (PHYSADDR(P2SEGADDR(phys_addr)) == phys_addr)
		return (void __iomem *)P2SEGADDR(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_GLOBAL | _PAGE_RW | _PAGE_DIRTY
			| _PAGE_ACCESSED | _PAGE_TYPE_SMALL | 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 (void __iomem *)(offset + (char *)addr);
}
EXPORT_SYMBOL(__ioremap);

void __iounmap(void __iomem *addr)
{
	struct vm_struct *p;

	if ((unsigned long)addr >= P4SEG)
		return;
	if (PXSEG(addr) == P2SEG)
		return;

	p = remove_vm_area((void *)(PAGE_MASK & (unsigned long __force)addr));
	if (unlikely(!p)) {
		printk (KERN_ERR "iounmap: bad address %p\n", addr);
		return;
	}

	kfree (p);
}
EXPORT_SYMBOL(__iounmap);
17f7ccf'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/powerpc?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>powerpc</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/powerpc/platforms?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>platforms</a>/<a href='/cgit.cgi/linux/net-next.git/diff/arch/powerpc/platforms/amigaone?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>amigaone</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='5db4992d8f040b8d8db0b86d42806e0c417f7ccf'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>Diffstat</a> (limited to 'arch/powerpc/platforms/amigaone')</div><table summary='diffstat' class='diffstat'>