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

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2014, 2015.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
x86-family/ioport.cpp
IO ports.
*******************************************************************************/
#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