Commit e34067fd authored by Haavard Skinnemoen's avatar Haavard Skinnemoen Committed by Linus Torvalds
Browse files

[PATCH] Generic ioremap_page_range: parisc conversion



Convert parisc to use generic ioremap_page_range()
Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: default avatarKyle McMartin <kyle@parisc-linux.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 8e087929
......@@ -9,110 +9,8 @@
#include <linux/vmalloc.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <asm/io.h>
#include <linux/io.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.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, pfn;
pgprot_t pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
_PAGE_ACCESSED | flags);
address &= ~PMD_MASK;
end = address + size;
if (end > PMD_SIZE)
end = PMD_SIZE;
BUG_ON(address >= end);
pfn = phys_addr >> PAGE_SHIFT;
do {
BUG_ON(!pte_none(*pte));
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;
BUG_ON(address >= end);
phys_addr -= address;
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)
{
pgd_t *dir;
int error = 0;
unsigned long end = address + size;
BUG_ON(address >= end);
phys_addr -= address;
dir = pgd_offset_k(address);
flush_cache_all();
do {
pud_t *pud;
pmd_t *pmd;
error = -ENOMEM;
pud = pud_alloc(&init_mm, dir, address);
if (!pud)
break;
pmd = pmd_alloc(&init_mm, pud, address);
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 error;
}
/*
* Generic mapping function (not visible outside):
......@@ -131,6 +29,7 @@ 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;
#ifdef CONFIG_EISA
unsigned long end = phys_addr + size - 1;
......@@ -164,6 +63,9 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
}
}
pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
_PAGE_ACCESSED | flags);
/*
* Mappings have to be page-aligned
*/
......@@ -179,7 +81,8 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
return NULL;
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)) {
vfree(addr);
return NULL;
}
......
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