Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-26 04:42:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

[PATCH] Generic ioremap_page_range: sh64 conversion

Browse Source 
Convert SH64 to use generic ioremap_page_range()

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Haavard Skinnemoen 2006-12-08 02:38:08 -08:00 committed by Linus Torvalds
parent 5b3e1a85c2
commit 10731b88a2
1 changed files with 8 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
arch/sh64/mm/ioremap.c
View File

@ -18,7 +18,7 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/string.h> #include <linux/string.h>
#include <asm/io.h> #include <linux/io.h>
#include <asm/pgalloc.h> #include <asm/pgalloc.h>
#include <asm/tlbflush.h> #include <asm/tlbflush.h>
#include <linux/ioport.h> #include <linux/ioport.h>
@ -28,96 +28,6 @@
static void shmedia_mapioaddr(unsigned long, unsigned long); static void shmedia_mapioaddr(unsigned long, unsigned long);
static unsigned long shmedia_ioremap(struct resource *, u32, int); static unsigned long shmedia_ioremap(struct resource *, u32, int);
static inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size,
unsigned long phys_addr, unsigned long flags)
{
unsigned long end;
unsigned long pfn;
pgprot_t pgprot = __pgprot(_PAGE_PRESENT | _PAGE_READ |
_PAGE_WRITE | _PAGE_DIRTY |
_PAGE_ACCESSED | _PAGE_SHARED | flags);
address &= ~PMD_MASK;
end = address + size;
if (end > PMD_SIZE)
end = PMD_SIZE;
if (address >= end)
BUG();
pfn = phys_addr >> PAGE_SHIFT;
pr_debug(" %s: pte %p address %lx size %lx phys_addr %lx\n",
__FUNCTION__,pte,address,size,phys_addr);
do {
if (!pte_none(*pte)) {
printk("remap_area_pte: page already exists\n");
BUG();
}
set_pte(pte, pfn_pte(pfn, pgprot));
address += PAGE_SIZE;
pfn++;
pte++;
} while (address && (address < end));
}
static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
unsigned long phys_addr, unsigned long flags)
{
unsigned long end;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
phys_addr -= address;
if (address >= end)
BUG();
do {
pte_t * pte = pte_alloc_kernel(pmd, address);
if (!pte)
return -ENOMEM;
remap_area_pte(pte, address, end - address, address + phys_addr, flags);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address && (address < end));
return 0;
}
static int remap_area_pages(unsigned long address, unsigned long phys_addr,
unsigned long size, unsigned long flags)
{
int error;
pgd_t * dir;
unsigned long end = address + size;
phys_addr -= address;
dir = pgd_offset_k(address);
flush_cache_all();
if (address >= end)
BUG();
do {
pmd_t *pmd = pmd_alloc(&init_mm, dir, address);
error = -ENOMEM;
if (!pmd)
break;
if (remap_area_pmd(pmd, address, end - address,
phys_addr + address, flags)) {
break;
}
error = 0;
address = (address + PGDIR_SIZE) & PGDIR_MASK;
dir++;
} while (address && (address < end));
flush_tlb_all();
return 0;
}
/* /*
* Generic mapping function (not visible outside): * Generic mapping function (not visible outside):
*/ */
@ -136,12 +46,17 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
void * addr; void * addr;
struct vm_struct * area; struct vm_struct * area;
unsigned long offset, last_addr; unsigned long offset, last_addr;
pgprot_t pgprot;
/* Don't allow wraparound or zero size */ /* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1; last_addr = phys_addr + size - 1;
if (!size || last_addr < phys_addr) if (!size || last_addr < phys_addr)
return NULL; return NULL;
pgprot = __pgprot(_PAGE_PRESENT | _PAGE_READ |
_PAGE_WRITE | _PAGE_DIRTY |
_PAGE_ACCESSED | _PAGE_SHARED | flags);
/* /*
* Mappings have to be page-aligned * Mappings have to be page-aligned
*/ */
@ -158,7 +73,8 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
return NULL; return NULL;
area->phys_addr = phys_addr; area->phys_addr = phys_addr;
addr = area->addr; addr = area->addr;
if (remap_area_pages((unsigned long)addr, phys_addr, size, flags)) { if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
phys_addr, pgprot)) {
vunmap(addr); vunmap(addr);
return NULL; return NULL;
} }