556dcee7b8
Change all users of header files to correct path. Remove some unneeded headers for arch-v32. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/*
|
|
* arch/cris/mm/ioremap.c
|
|
*
|
|
* 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).
|
|
*
|
|
* (C) Copyright 1995 1996 Linus Torvalds
|
|
* CRIS-port by Axis Communications AB
|
|
*/
|
|
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/io.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <arch/memmap.h>
|
|
|
|
/*
|
|
* Generic mapping function (not visible outside):
|
|
*/
|
|
|
|
/*
|
|
* 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_prot(unsigned long phys_addr, unsigned long size, pgprot_t prot)
|
|
{
|
|
void __iomem * addr;
|
|
struct vm_struct * area;
|
|
unsigned long offset, last_addr;
|
|
|
|
/* Don't allow wraparound or zero size */
|
|
last_addr = phys_addr + size - 1;
|
|
if (!size || last_addr < phys_addr)
|
|
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;
|
|
addr = (void __iomem *)area->addr;
|
|
if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
|
|
phys_addr, prot)) {
|
|
vfree((void __force *)addr);
|
|
return NULL;
|
|
}
|
|
return (void __iomem *) (offset + (char __iomem *)addr);
|
|
}
|
|
|
|
void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
|
|
{
|
|
return __ioremap_prot(phys_addr, size,
|
|
__pgprot(_PAGE_PRESENT | __READABLE |
|
|
__WRITEABLE | _PAGE_GLOBAL |
|
|
_PAGE_KERNEL | flags));
|
|
}
|
|
|
|
/**
|
|
* ioremap_nocache - map bus memory into CPU space
|
|
* @offset: bus address of the memory
|
|
* @size: size of the resource to map
|
|
*
|
|
* Must be freed with iounmap.
|
|
*/
|
|
|
|
void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
|
|
{
|
|
return __ioremap(phys_addr | MEM_NON_CACHEABLE, size, 0);
|
|
}
|
|
|
|
void iounmap(volatile void __iomem *addr)
|
|
{
|
|
if (addr > high_memory)
|
|
return vfree((void *) (PAGE_MASK & (unsigned long) addr));
|
|
}
|