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Subject[PATCH 7/14] Generic ioremap_page_range: i386 conversion
Date
From: Andi Kleen <ak@suse.de>

Convert i386 to use generic ioremap_page_range()

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Andi Kleen <ak@suse.de>
---
arch/i386/mm/ioremap.c | 85 +++---------------------------------------------
1 files changed, 6 insertions(+), 79 deletions(-)
diff --git a/arch/i386/mm/ioremap.c b/arch/i386/mm/ioremap.c
index 247fde7..f773126 100644
--- a/arch/i386/mm/ioremap.c
+++ b/arch/i386/mm/ioremap.c
@@ -12,91 +12,14 @@ #include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <asm/fixmap.h>
-#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/pgtable.h>

#define ISA_START_ADDRESS 0xa0000
#define ISA_END_ADDRESS 0x100000

-static int ioremap_pte_range(pmd_t *pmd, unsigned long addr,
- unsigned long end, unsigned long phys_addr, unsigned long flags)
-{
- pte_t *pte;
- unsigned long pfn;
-
- pfn = phys_addr >> PAGE_SHIFT;
- pte = pte_alloc_kernel(pmd, addr);
- if (!pte)
- return -ENOMEM;
- do {
- BUG_ON(!pte_none(*pte));
- set_pte(pte, pfn_pte(pfn, __pgprot(_PAGE_PRESENT | _PAGE_RW |
- _PAGE_DIRTY | _PAGE_ACCESSED | flags)));
- pfn++;
- } while (pte++, addr += PAGE_SIZE, addr != end);
- return 0;
-}
-
-static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr,
- unsigned long end, unsigned long phys_addr, unsigned long flags)
-{
- pmd_t *pmd;
- unsigned long next;
-
- phys_addr -= addr;
- pmd = pmd_alloc(&init_mm, pud, addr);
- if (!pmd)
- return -ENOMEM;
- do {
- next = pmd_addr_end(addr, end);
- if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, flags))
- return -ENOMEM;
- } while (pmd++, addr = next, addr != end);
- return 0;
-}
-
-static inline int ioremap_pud_range(pgd_t *pgd, unsigned long addr,
- unsigned long end, unsigned long phys_addr, unsigned long flags)
-{
- pud_t *pud;
- unsigned long next;
-
- phys_addr -= addr;
- pud = pud_alloc(&init_mm, pgd, addr);
- if (!pud)
- return -ENOMEM;
- do {
- next = pud_addr_end(addr, end);
- if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, flags))
- return -ENOMEM;
- } while (pud++, addr = next, addr != end);
- return 0;
-}
-
-static int ioremap_page_range(unsigned long addr,
- unsigned long end, unsigned long phys_addr, unsigned long flags)
-{
- pgd_t *pgd;
- unsigned long next;
- int err;
-
- BUG_ON(addr >= end);
- flush_cache_all();
- phys_addr -= addr;
- pgd = pgd_offset_k(addr);
- do {
- next = pgd_addr_end(addr, end);
- err = ioremap_pud_range(pgd, addr, next, phys_addr+addr, flags);
- if (err)
- break;
- } while (pgd++, addr = next, addr != end);
- flush_tlb_all();
- return err;
-}
-
/*
* Generic mapping function (not visible outside):
*/
@@ -115,6 +38,7 @@ void __iomem * __ioremap(unsigned long p
void __iomem * addr;
struct vm_struct * area;
unsigned long offset, last_addr;
+ pgprot_t prot;

/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
@@ -142,6 +66,9 @@ void __iomem * __ioremap(unsigned long p
return NULL;
}

+ prot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY
+ | _PAGE_ACCESSED | flags);
+
/*
* Mappings have to be page-aligned
*/
@@ -158,7 +85,7 @@ void __iomem * __ioremap(unsigned long p
area->phys_addr = phys_addr;
addr = (void __iomem *) area->addr;
if (ioremap_page_range((unsigned long) addr,
- (unsigned long) addr + size, phys_addr, flags)) {
+ (unsigned long) addr + size, phys_addr, prot)) {
vunmap((void __force *) addr);
return NULL;
}
--
1.4.0
-
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