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[PATCH] Generic ioremap_page_range: x86_64 conversion 

Convert x86_64 to use generic ioremap_page_range()

[akpm@osdl.org: build fix]
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Haavard Skinnemoen 2006-09-30 23:29:19 -07:00 committed by Linus Torvalds
parent 9540fc4230
commit 16c564bb3c
1 changed files with 7 additions and 104 deletions
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111
arch/x86_64/mm/ioremap.c
View File

@ -12,117 +12,16 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <asm/io.h>
#include <linux/io.h>
#include <asm/pgalloc.h>
#include <asm/fixmap.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <asm/proto.h>
#define ISA_START_ADDRESS 0xa0000
#define ISA_END_ADDRESS 0x100000
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(_PAGE_PRESENT | _PAGE_RW |
_PAGE_GLOBAL | _PAGE_DIRTY | _PAGE_ACCESSED | 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 &= ~PUD_MASK;
end = address + size;
if (end > PUD_SIZE)
end = PUD_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 inline int remap_area_pud(pud_t * pud, 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 {
pmd_t * pmd = pmd_alloc(&init_mm, pud, address);
if (!pmd)
return -ENOMEM;
remap_area_pmd(pmd, address, end - address, address + phys_addr, flags);
address = (address + PUD_SIZE) & PUD_MASK;
pud++;
} 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 *pgd;
unsigned long end = address + size;
phys_addr -= address;
pgd = pgd_offset_k(address);
flush_cache_all();
if (address >= end)
BUG();
do {
pud_t *pud;
pud = pud_alloc(&init_mm, pgd, address);
error = -ENOMEM;
if (!pud)
break;
if (remap_area_pud(pud, address, end - address,
phys_addr + address, flags))
break;
error = 0;
address = (address + PGDIR_SIZE) & PGDIR_MASK;
pgd++;
} while (address && (address < end));
flush_tlb_all();
return error;
}
/*
* Fix up the linear direct mapping of the kernel to avoid cache attribute
* conflicts.
@ -165,6 +64,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
void * addr;
struct vm_struct * area;
unsigned long offset, last_addr;
pgprot_t pgprot;
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
@ -194,6 +94,8 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
}
#endif
pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_GLOBAL
| _PAGE_DIRTY | _PAGE_ACCESSED | flags);
/*
* Mappings have to be page-aligned
*/
@ -209,7 +111,8 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
return NULL;
area->phys_addr = phys_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)) {
remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr));
return NULL;
}