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[PATCH] Generic ioremap_page_range: s390 conversion

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Convert S390 to use generic ioremap_page_range()

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
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 02:38:06 -08:00 committed by Linus Torvalds
parent e34067fdd2
commit a151ca62d7
1 changed files with 3 additions and 81 deletions
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84
arch/s390/mm/ioremap.c
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@ -15,87 +15,8 @@
#include <linux/vmalloc.h> #include <linux/vmalloc.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <asm/io.h> #include <linux/io.h>
#include <asm/pgalloc.h> #include <asm/pgalloc.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
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;
address &= ~PMD_MASK;
end = address + size;
if (end > PMD_SIZE)
end = PMD_SIZE;
if (address >= end)
BUG();
pfn = phys_addr >> PAGE_SHIFT;
do {
if (!pte_none(*pte)) {
printk("remap_area_pte: page already exists\n");
BUG();
}
set_pte(pte, pfn_pte(pfn, __pgprot(flags)));
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(&init_mm, address);
flush_cache_all();
if (address >= end)
BUG();
do {
pmd_t *pmd;
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):
@ -122,7 +43,8 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
if (!area) if (!area)
return NULL; return NULL;
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(flags))) {
vfree(addr); vfree(addr);
return NULL; return NULL;
} }