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//
// Copyright(C) 2005-2014 Simon Howard
//
// This program 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 2
// of the License, or (at your option) any later version.
//
// This program 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.
//
// DESCRIPTION:
// OPL OpenBSD interface (also NetBSD)
//
#include "config.h"
// OpenBSD has a i386_iopl on i386 and amd64_iopl on x86_64,
// even though they do the same thing. Take care of this
// here, and map set_iopl to point to the appropriate name.
#if defined(HAVE_LIBI386)
#include <sys/types.h>
#include <machine/sysarch.h>
#include <i386/pio.h>
#define set_iopl i386_iopl
#elif defined(HAVE_LIBAMD64)
#include <sys/types.h>
#include <machine/sysarch.h>
#include <amd64/pio.h>
#define set_iopl amd64_iopl
#else
#define NO_OBSD_DRIVER
#endif
// If the above succeeded, proceed with the rest.
#ifndef NO_OBSD_DRIVER
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "opl.h"
#include "opl_internal.h"
#include "opl_timer.h"
static unsigned int opl_port_base;
static int OPL_OpenBSD_Init(unsigned int port_base)
{
// Try to get permissions:
if (set_iopl(3) < 0)
{
fprintf(stderr, "Failed to get raise I/O privilege level: "
"check that you are running as root.\n");
return 0;
}
opl_port_base = port_base;
// Start callback thread
if (!OPL_Timer_StartThread())
{
set_iopl(0);
return 0;
}
return 1;
}
static void OPL_OpenBSD_Shutdown(void)
{
// Stop callback thread
OPL_Timer_StopThread();
// Release I/O port permissions:
set_iopl(0);
}
static unsigned int OPL_OpenBSD_PortRead(opl_port_t port)
{
return inb(opl_port_base + port);
}
static void OPL_OpenBSD_PortWrite(opl_port_t port, unsigned int value)
{
outb(opl_port_base + port, value);
}
opl_driver_t opl_openbsd_driver =
{
"OpenBSD",
OPL_OpenBSD_Init,
OPL_OpenBSD_Shutdown,
OPL_OpenBSD_PortRead,
OPL_OpenBSD_PortWrite,
OPL_Timer_SetCallback,
OPL_Timer_ClearCallbacks,
OPL_Timer_Lock,
OPL_Timer_Unlock,
OPL_Timer_SetPaused,
OPL_Timer_AdjustCallbacks,
};
#endif /* #ifndef NO_OBSD_DRIVER */
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