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| author | Mike Frysinger <vapier@gentoo.org> | 2009-11-30 13:51:24 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-01-17 09:17:27 -0500 |
| commit | a52ad4f99486ce3f404f83f75263e321956bb6d5 (patch) | |
| tree | e2b0df114689789e35e08548099ba19100de024a /lib_blackfin/outs.S | |
| parent | 5eefe7e99537ca3641496185f23b1dc9e76b405c (diff) | |
| download | u-boot-imx-a52ad4f99486ce3f404f83f75263e321956bb6d5.zip u-boot-imx-a52ad4f99486ce3f404f83f75263e321956bb6d5.tar.gz u-boot-imx-a52ad4f99486ce3f404f83f75263e321956bb6d5.tar.bz2 | |
Blackfin: pull io funcs from linux
Some common code uses more of the io.h funcs than we currently provide, so
pull in all of the ones from the linux kernel.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'lib_blackfin/outs.S')
| -rw-r--r-- | lib_blackfin/outs.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/lib_blackfin/outs.S b/lib_blackfin/outs.S new file mode 100644 index 0000000..90c6033 --- /dev/null +++ b/lib_blackfin/outs.S @@ -0,0 +1,60 @@ +/* + * Implementation of outs{bwl} for BlackFin processors using zero overhead loops. + * + * Copyright 2005-2009 Analog Devices Inc. + * 2005 BuyWays BV + * Bas Vermeulen <bas@buyways.nl> + * + * Licensed under the GPL-2. + */ + +#include <asm/linkage.h> + +.align 2 + +ENTRY(_outsl) + P0 = R0; /* P0 = port */ + P1 = R1; /* P1 = address */ + P2 = R2; /* P2 = count */ + + LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2; +.Llong_loop_s: R0 = [P1++]; +.Llong_loop_e: [P0] = R0; + RTS; +ENDPROC(_outsl) + +ENTRY(_outsw) + P0 = R0; /* P0 = port */ + P1 = R1; /* P1 = address */ + P2 = R2; /* P2 = count */ + + LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2; +.Lword_loop_s: R0 = W[P1++]; +.Lword_loop_e: W[P0] = R0; + RTS; +ENDPROC(_outsw) + +ENTRY(_outsb) + P0 = R0; /* P0 = port */ + P1 = R1; /* P1 = address */ + P2 = R2; /* P2 = count */ + + LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2; +.Lbyte_loop_s: R0 = B[P1++]; +.Lbyte_loop_e: B[P0] = R0; + RTS; +ENDPROC(_outsb) + +ENTRY(_outsw_8) + P0 = R0; /* P0 = port */ + P1 = R1; /* P1 = address */ + P2 = R2; /* P2 = count */ + + LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2; +.Lword8_loop_s: R1 = B[P1++]; + R0 = B[P1++]; + R0 = R0 << 8; + R0 = R0 + R1; +.Lword8_loop_e: W[P0] = R0; + RTS; +ENDPROC(_outsw_8) |