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csky: use generic ioremap 

Use the generic ioremap_prot and iounmap helpers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Guo Ren <guoren@kernel.org>
This commit is contained in:
Christoph Hellwig 2019-08-13 11:41:57 +02:00
parent 1246b8146c
commit 0055f67b59
4 changed files with 8 additions and 50 deletions
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1
arch/csky/Kconfig
View File

@ -17,6 +17,7 @@ config CSKY
select IRQ_DOMAIN
select HANDLE_DOMAIN_IRQ
select DW_APB_TIMER_OF
select GENERIC_IOREMAP
select GENERIC_LIB_ASHLDI3
select GENERIC_LIB_ASHRDI3
select GENERIC_LIB_LSHRDI3

8
arch/csky/include/asm/io.h
View File

@ -36,11 +36,9 @@
/*
* I/O memory mapping functions.
*/
extern void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot);
extern void iounmap(void *addr);
#define ioremap(addr, size) __ioremap((addr), (size), pgprot_noncached(PAGE_KERNEL))
#define ioremap_wc(addr, size) __ioremap((addr), (size), pgprot_writecombine(PAGE_KERNEL))
#define ioremap_wc(addr, size) \
ioremap_prot((addr), (size), \
(_PAGE_IOREMAP & ~_CACHE_MASK) | _CACHE_UNCACHED)
#include <asm-generic/io.h>

4
arch/csky/include/asm/pgtable.h
View File

@ -86,6 +86,10 @@
#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
_CACHE_CACHED)
#define _PAGE_IOREMAP \
(_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL | \
_CACHE_UNCACHED | _PAGE_SO)
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
#define __P010 PAGE_COPY

45
arch/csky/mm/ioremap.c
View File

@ -3,53 +3,8 @@
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/io.h>
#include <asm/pgtable.h>
static void __iomem *__ioremap_caller(phys_addr_t addr, size_t size,
pgprot_t prot, void *caller)
{
phys_addr_t last_addr;
unsigned long offset, vaddr;
struct vm_struct *area;
last_addr = addr + size - 1;
if (!size || last_addr < addr)
return NULL;
offset = addr & (~PAGE_MASK);
addr &= PAGE_MASK;
size = PAGE_ALIGN(size + offset);
area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)
return NULL;
vaddr = (unsigned long)area->addr;
if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
free_vm_area(area);
return NULL;
}
return (void __iomem *)(vaddr + offset);
}
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(void __iomem *addr)
{
vunmap((void *)((unsigned long)addr & PAGE_MASK));
}
EXPORT_SYMBOL(iounmap);
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot)
{