119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
//
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// Copyright(C) 2005-2014 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// DESCRIPTION:
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// OPL OpenBSD interface (also NetBSD)
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//
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#include "config.h"
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// OpenBSD has a i386_iopl on i386 and amd64_iopl on x86_64,
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// even though they do the same thing. Take care of this
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// here, and map set_iopl to point to the appropriate name.
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#if defined(HAVE_LIBI386)
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#include <sys/types.h>
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#include <machine/sysarch.h>
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#include <i386/pio.h>
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#define set_iopl i386_iopl
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#elif defined(HAVE_LIBAMD64)
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#include <sys/types.h>
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#include <machine/sysarch.h>
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#include <amd64/pio.h>
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#define set_iopl amd64_iopl
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#else
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#define NO_OBSD_DRIVER
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#endif
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// If the above succeeded, proceed with the rest.
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#ifndef NO_OBSD_DRIVER
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "opl.h"
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#include "opl_internal.h"
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#include "opl_timer.h"
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static unsigned int opl_port_base;
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static int OPL_OpenBSD_Init(unsigned int port_base)
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{
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// Try to get permissions:
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if (set_iopl(3) < 0)
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{
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fprintf(stderr, "Failed to get raise I/O privilege level: "
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"check that you are running as root.\n");
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return 0;
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}
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opl_port_base = port_base;
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// Start callback thread
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if (!OPL_Timer_StartThread())
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{
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set_iopl(0);
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return 0;
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}
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return 1;
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}
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static void OPL_OpenBSD_Shutdown(void)
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{
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// Stop callback thread
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OPL_Timer_StopThread();
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// Release I/O port permissions:
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set_iopl(0);
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}
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static unsigned int OPL_OpenBSD_PortRead(opl_port_t port)
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{
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return inb(opl_port_base + port);
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}
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static void OPL_OpenBSD_PortWrite(opl_port_t port, unsigned int value)
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{
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outb(opl_port_base + port, value);
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}
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opl_driver_t opl_openbsd_driver =
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{
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"OpenBSD",
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OPL_OpenBSD_Init,
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OPL_OpenBSD_Shutdown,
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OPL_OpenBSD_PortRead,
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OPL_OpenBSD_PortWrite,
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OPL_Timer_SetCallback,
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OPL_Timer_ClearCallbacks,
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OPL_Timer_Lock,
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OPL_Timer_Unlock,
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OPL_Timer_SetPaused,
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OPL_Timer_AdjustCallbacks,
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};
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#endif /* #ifndef NO_OBSD_DRIVER */
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