From: Leandro Fanzone <leandro@hasar.com>
To: ecos-discuss@ecos.sourceware.org
Subject: [ECOS] HAL_*_STRING
Date: Wed, 15 Jun 2005 14:32:00 -0000 [thread overview]
Message-ID: <42B03AFD.8040106@hasar.com> (raw)
Hello,
I'm using ecos 2.0 under x86, and tried to use the HAL_*_STRING
macros, both for reading and writing. They don't work properly; the
assembly output shows that they lack the rep instruction preceding the
insb/outsb instructions. So the macros would be:
#define HAL_READ_UINT8_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "rep insb" \
: \
: "c" (_count_), "d"(_register_), "D"(_buf_) \
); \
CYG_MACRO_END
#define HAL_WRITE_UINT8_STRING( _register_, _buf_, _count_) \
CYG_MACRO_START \
asm volatile ( "rep outsb" \
: \
: "c" (_count_), "d"(_register_), "S"(_buf_) \
); \
CYG_MACRO_END
The same thing for the 16 bit and 32 bit versions.
Regards,
Leandro Fanzone
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next reply other threads:[~2005-06-15 14:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-15 14:32 Leandro Fanzone [this message]
2005-06-15 14:45 ` Gary Thomas
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