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sortix--sortix/kernel/x86-family/ioport.cpp

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/*
* Copyright (c) 2014, 2015 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* x86-family/ioport.cpp
* IO ports.
*/
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#include <errno.h>
#include <timespec.h>
#include <sortix/clock.h>
#include <sortix/kernel/clock.h>
#include <sortix/kernel/ioport.h>
#include <sortix/kernel/time.h>
namespace Sortix {
bool wait_inport8_clear(uint16_t ioport, uint8_t bits, bool any, unsigned int msecs)
{
struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
Clock* clock = Time::GetClock(CLOCK_BOOT);
struct timespec begun;
clock->Get(&begun, NULL);
while ( true )
{
struct timespec now;
clock->Get(&now, NULL);
uint8_t reg_snapshop = inport8(ioport);
if ( !any && (reg_snapshop & bits) == 0 )
return true;
if ( any && (reg_snapshop & bits) != bits )
return true;
struct timespec elapsed = timespec_sub(now, begun);
if ( timespec_le(timeout, elapsed) )
return errno = ETIMEDOUT, false;
kthread_yield();
}
}
bool wait_inport8_set(uint16_t ioport, uint8_t bits, bool any, unsigned int msecs)
{
struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
Clock* clock = Time::GetClock(CLOCK_BOOT);
struct timespec begun;
clock->Get(&begun, NULL);
while ( true )
{
struct timespec now;
clock->Get(&now, NULL);
uint8_t reg_snapshop = inport8(ioport);
if ( !any && (reg_snapshop & bits) == bits )
return true;
if ( any && (reg_snapshop & bits) != 0 )
return true;
struct timespec elapsed = timespec_sub(now, begun);
if ( timespec_le(timeout, elapsed) )
return errno = ETIMEDOUT, false;
kthread_yield();
}
}
} // namespace Sortix