diff options
| author | Greentime Hu <greentime@andestech.com> | 2017-10-24 15:25:00 +0800 |
|---|---|---|
| committer | Greentime Hu <greentime@andestech.com> | 2018-02-22 10:44:31 +0800 |
| commit | 664eec400bf8f3ab4d41279d6fb674a66ff3ba94 (patch) | |
| tree | ed442dae871d6d2d07a2cbe4177c88cf624dc58a /arch/nds32/lib | |
| parent | 59fd53cd5ca0a6930accf53db34cbeef8fcbc195 (diff) | |
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>
Diffstat (limited to 'arch/nds32/lib')
| -rw-r--r-- | arch/nds32/lib/copy_page.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/nds32/lib/copy_page.S b/arch/nds32/lib/copy_page.S new file mode 100644 index 000000000000..4a2ff85f17ee --- /dev/null +++ b/arch/nds32/lib/copy_page.S @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#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) + +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) |