diff options
| author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2006-10-24 12:12:44 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-26 07:26:33 +0400 |
| commit | d68041cc9fde550fe6b6a6de1d7a110daff3cb60 (patch) | |
| tree | 1b712054a6466b7901339ebaba37ce27c7f2b1a0 /arch/avr32/lib/io-writesb.S | |
| parent | 065834ab3988fece5608088e83724891c8190a2f (diff) | |
| download | linux-d68041cc9fde550fe6b6a6de1d7a110daff3cb60.tar.xz | |
[PATCH] AVR32: Implement and export __raw_{read,write}s[bwl]
Implement __raw_readsb and __raw_writesb. Export __raw_reads[bwl]
and __raw_writes[bwl] for use by modules.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/avr32/lib/io-writesb.S')
| -rw-r--r-- | arch/avr32/lib/io-writesb.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/avr32/lib/io-writesb.S b/arch/avr32/lib/io-writesb.S new file mode 100644 index 000000000000..b4ebaacccf68 --- /dev/null +++ b/arch/avr32/lib/io-writesb.S @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + + .text +.Lnot_word_aligned: +1: ld.ub r8, r11++ + sub r10, 1 + st.b r12[0], r8 + reteq r12 + tst r11, r9 + brne 1b + + /* fall through */ + + .global __raw_writesb + .type __raw_writesb,@function +__raw_writesb: + cp.w r10, 0 + mov r9, 3 + reteq r12 + + tst r11, r9 + brne .Lnot_word_aligned + + sub r10, 4 + brlt 2f + +1: ld.w r8, r11++ + bfextu r9, r8, 24, 8 + st.b r12[0], r9 + bfextu r9, r8, 16, 8 + st.b r12[0], r9 + bfextu r9, r8, 8, 8 + st.b r12[0], r9 + st.b r12[0], r8 + sub r10, 4 + brge 1b + +2: sub r10, -4 + reteq r12 + +3: ld.ub r8, r11++ + sub r10, 1 + st.b r12[0], r8 + brne 3b + + retal r12 |