openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

sparc32: drop fixmap.h 

sparc32 does not support fixmaps - so do not pretend so by
having the fixmap.h file.
Move relevant parts to vaddrs.h.

I looked at simplifying this even more but failed to understand
the reasoning behind the extra guard page involved and due to
missing testing possibilities only the trivial conversion was done.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sam Ravnborg 2012-07-26 11:02:19 +00:00 committed by David S. Miller
parent c00db32122
commit 1b6d06d820
4 changed files with 26 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
arch/sparc/include/asm/fixmap.h
View File

@ -1,26 +0,0 @@
/* Highmem related constants */
#ifndef _ASM_FIXMAP_H
#define _ASM_FIXMAP_H
#include <asm/kmap_types.h>
enum fixed_addresses {
FIX_HOLE,
#ifdef CONFIG_HIGHMEM
FIX_KMAP_BEGIN,
FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS),
#endif
__end_of_fixed_addresses
};
/* Leave one empty page between IO pages at 0xfd000000 and
* the top of the fixmap.
*/
#define FIXADDR_TOP (0xfcfff000UL)
#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#endif

1
arch/sparc/include/asm/highmem.h
View File

@ -21,7 +21,6 @@
#ifdef __KERNEL__
#include <linux/interrupt.h>
#include <asm/fixmap.h>
#include <asm/vaddrs.h>
#include <asm/kmap_types.h>
#include <asm/pgtable.h>

22
arch/sparc/include/asm/vaddrs.h
View File

@ -30,6 +30,28 @@
*/
#define SRMMU_NOCACHE_ALCRATIO 64 /* 256 pages per 64MB of system RAM */
#ifndef __ASSEMBLY__
#include <asm/kmap_types.h>
enum fixed_addresses {
FIX_HOLE,
#ifdef CONFIG_HIGHMEM
FIX_KMAP_BEGIN,
FIX_KMAP_END = (KM_TYPE_NR * NR_CPUS),
#endif
__end_of_fixed_addresses
};
#endif
/* Leave one empty page between IO pages at 0xfd000000 and
* the top of the fixmap.
*/
#define FIXADDR_TOP (0xfcfff000UL)
#define FIXADDR_SIZE ((FIX_KMAP_END + 1) << PAGE_SHIFT)
#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#define SUN4M_IOBASE_VADDR 0xfd000000 /* Base for mapping pages */
#define IOBASE_VADDR 0xfe000000
#define IOBASE_END 0xfe600000

7
arch/sparc/mm/highmem.c
View File

@ -22,13 +22,14 @@
* shared by CPUs, and so precious, and establishing them requires IPI.
* Atomic kmaps are lightweight and we may have NCPUS more of them.
*/
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/export.h>
#include <asm/pgalloc.h>
#include <linux/mm.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/fixmap.h>
#include <asm/pgalloc.h>
#include <asm/vaddrs.h>
void *kmap_atomic(struct page *page)
{