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OpenCloudOS-Kernel/arch/nds32/lib/copy_page.S

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nds32: MMU fault handling and page table management This patch includes page fault handler, mmap and fixup implementations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2017-10-24 15:25:00 +08:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2005-2017 Andes Technology Corporation
#include <linux/linkage.h>
nds32: Fix the symbols undefined issue by exporting them. It broke the 'allmodconfig' build. LD vmlinux SYSMAP System.map Building modules, stage 2. MODPOST 5028 modules ERROR: "flush_dcache_page" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined! ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined! ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined! ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! ... Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-04-19 15:45:45 +08:00
#include <asm/export.h>
nds32: MMU fault handling and page table management This patch includes page fault handler, mmap and fixup implementations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2017-10-24 15:25:00 +08:00
#include <asm/page.h>
.text
ENTRY(copy_page)
pushm $r2, $r10
movi $r2, PAGE_SIZE >> 5
.Lcopy_loop:
lmw.bim $r3, [$r1], $r10
smw.bim $r3, [$r0], $r10
subi45 $r2, #1
bnez38 $r2, .Lcopy_loop
popm $r2, $r10
ret
ENDPROC(copy_page)
nds32: Fix the symbols undefined issue by exporting them. It broke the 'allmodconfig' build. LD vmlinux SYSMAP System.map Building modules, stage 2. MODPOST 5028 modules ERROR: "flush_dcache_page" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined! ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined! ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined! ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! ... Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-04-19 15:45:45 +08:00
EXPORT_SYMBOL(copy_page)
nds32: MMU fault handling and page table management This patch includes page fault handler, mmap and fixup implementations. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2017-10-24 15:25:00 +08:00
ENTRY(clear_page)
pushm $r1, $r9
movi $r1, PAGE_SIZE >> 5
movi55 $r2, #0
movi55 $r3, #0
movi55 $r4, #0
movi55 $r5, #0
movi55 $r6, #0
movi55 $r7, #0
movi55 $r8, #0
movi55 $r9, #0
.Lclear_loop:
smw.bim $r2, [$r0], $r9
subi45 $r1, #1
bnez38 $r1, .Lclear_loop
popm $r1, $r9
ret
ENDPROC(clear_page)
nds32: Fix the symbols undefined issue by exporting them. It broke the 'allmodconfig' build. LD vmlinux SYSMAP System.map Building modules, stage 2. MODPOST 5028 modules ERROR: "flush_dcache_page" [net/sunrpc/xprtrdma/rpcrdma.ko] undefined! ERROR: "empty_zero_page" [net/ceph/libceph.ko] undefined! ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined! ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! ... Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-04-19 15:45:45 +08:00
EXPORT_SYMBOL(clear_page)