Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Catalin Marinas |
254 |
70.56% |
1 |
12.50% |
| Mark Salter |
88 |
24.44% |
2 |
25.00% |
| Miles Chen |
7 |
1.94% |
1 |
12.50% |
| Min-Hua Chen |
6 |
1.67% |
1 |
12.50% |
| Thomas Gleixner |
2 |
0.56% |
1 |
12.50% |
| Christoph Hellwig |
2 |
0.56% |
1 |
12.50% |
| Laura Abbott |
1 |
0.28% |
1 |
12.50% |
| Total |
360 |
|
8 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on arch/arm/mm/ioremap.c
*
* (C) Copyright 1995 1996 Linus Torvalds
* Hacked for ARM by Phil Blundell <philb@gnu.org>
* Hacked to allow all architectures to build, and various cleanups
* by Russell King
* Copyright (C) 2012 ARM Ltd.
*/
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/io.h>
#include <asm/fixmap.h>
#include <asm/tlbflush.h>
static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size,
pgprot_t prot, void *caller)
{
unsigned long last_addr;
unsigned long offset = phys_addr & ~PAGE_MASK;
int err;
unsigned long addr;
struct vm_struct *area;
/*
* Page align the mapping address and size, taking account of any
* offset.
*/
phys_addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
/*
* Don't allow wraparound, zero size or outside PHYS_MASK.
*/
last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr || (last_addr & ~PHYS_MASK))
return NULL;
/*
* Don't allow RAM to be mapped.
*/
if (WARN_ON(pfn_valid(__phys_to_pfn(phys_addr))))
return NULL;
area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)
return NULL;
addr = (unsigned long)area->addr;
area->phys_addr = phys_addr;
err = ioremap_page_range(addr, addr + size, phys_addr, prot);
if (err) {
vunmap((void *)addr);
return NULL;
}
return (void __iomem *)(offset + addr);
}
void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot)
{
return __ioremap_caller(phys_addr, size, prot,
__builtin_return_address(0));
}
EXPORT_SYMBOL(__ioremap);
void iounmap(volatile void __iomem *io_addr)
{
unsigned long addr = (unsigned long)io_addr & PAGE_MASK;
/*
* We could get an address outside vmalloc range in case
* of ioremap_cache() reusing a RAM mapping.
*/
if (is_vmalloc_addr((void *)addr))
vunmap((void *)addr);
}
EXPORT_SYMBOL(iounmap);
void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size)
{
/* For normal memory we already have a cacheable mapping. */
if (pfn_valid(__phys_to_pfn(phys_addr)))
return (void __iomem *)__phys_to_virt(phys_addr);
return __ioremap_caller(phys_addr, size, __pgprot(PROT_NORMAL),
__builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_cache);
/*
* Must be called after early_fixmap_init
*/
void __init early_ioremap_init(void)
{
early_ioremap_setup();
}