81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2014, 2015.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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x86-family/ioport.cpp
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IO ports.
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*******************************************************************************/
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#include <errno.h>
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#include <timespec.h>
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#include <sortix/clock.h>
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#include <sortix/kernel/clock.h>
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#include <sortix/kernel/ioport.h>
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#include <sortix/kernel/time.h>
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namespace Sortix {
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bool wait_inport8_clear(uint16_t ioport, uint8_t bits, bool any, unsigned int msecs)
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{
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struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
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Clock* clock = Time::GetClock(CLOCK_BOOT);
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struct timespec begun;
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clock->Get(&begun, NULL);
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while ( true )
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{
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struct timespec now;
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clock->Get(&now, NULL);
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uint8_t reg_snapshop = inport8(ioport);
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if ( !any && (reg_snapshop & bits) == 0 )
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return true;
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if ( any && (reg_snapshop & bits) != bits )
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return true;
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struct timespec elapsed = timespec_sub(now, begun);
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if ( timespec_le(timeout, elapsed) )
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return errno = ETIMEDOUT, false;
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kthread_yield();
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}
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}
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bool wait_inport8_set(uint16_t ioport, uint8_t bits, bool any, unsigned int msecs)
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{
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struct timespec timeout = timespec_make(msecs / 1000, (msecs % 1000) * 1000000L);
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Clock* clock = Time::GetClock(CLOCK_BOOT);
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struct timespec begun;
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clock->Get(&begun, NULL);
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while ( true )
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{
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struct timespec now;
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clock->Get(&now, NULL);
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uint8_t reg_snapshop = inport8(ioport);
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if ( !any && (reg_snapshop & bits) == bits )
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return true;
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if ( any && (reg_snapshop & bits) != 0 )
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return true;
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struct timespec elapsed = timespec_sub(now, begun);
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if ( timespec_le(timeout, elapsed) )
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return errno = ETIMEDOUT, false;
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kthread_yield();
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}
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}
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} // namespace Sortix
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