diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m32r/mm/page.S | |
| download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m32r/mm/page.S')
| -rw-r--r-- | arch/m32r/mm/page.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/arch/m32r/mm/page.S b/arch/m32r/mm/page.S new file mode 100644 index 000000000000..a2e9367dbf79 --- /dev/null +++ b/arch/m32r/mm/page.S @@ -0,0 +1,82 @@ +/* + * linux/arch/m32r/mm/page.S + * + * Clear/Copy page with CPU + * + * Copyright (C) 2004 The Free Software Initiative of Japan + * + * Written by Niibe Yutaka + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + */ + .text + .global copy_page + /* + * copy_page (to, from) + * + * PAGE_SIZE = 4096-byte + * Cache line = 16-byte + * 16 * 256 + */ + .align 4 +copy_page: + ldi r2, #255 + ld r3, @r0 /* cache line allocate */ + ld r4, @r1+ + ld r5, @r1+ + ld r6, @r1+ + ld r7, @r1+ + .fillinsn +0: + st r4, @r0 + st r5, @+r0 + st r6, @+r0 + st r7, @+r0 + ld r4, @r1+ + addi r0, #4 + ld r5, @r1+ + ld r6, @r1+ + ld r7, @r1+ + ld r3, @r0 /* cache line allocate */ + addi r2, #-1 + bnez r2, 0b + + st r4, @r0 + st r5, @+r0 + st r6, @+r0 + st r7, @+r0 + jmp r14 + + .text + .global clear_page + /* + * clear_page (to) + * + * PAGE_SIZE = 4096-byte + * Cache line = 16-byte + * 16 * 256 + */ + .align 4 +clear_page: + ldi r2, #255 + ldi r4, #0 + ld r3, @r0 /* cache line allocate */ + .fillinsn +0: + st r4, @r0 + st r4, @+r0 + st r4, @+r0 + st r4, @+r0 + addi r0, #4 + ld r3, @r0 /* cache line allocate */ + addi r2, #-1 + bnez r2, 0b + + st r4, @r0 + st r4, @+r0 + st r4, @+r0 + st r4, @+r0 + jmp r14 |