diff options
Diffstat (limited to 'opl/opl_obsd.c')
-rw-r--r-- | opl/opl_obsd.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/opl/opl_obsd.c b/opl/opl_obsd.c new file mode 100644 index 00000000..b07a0421 --- /dev/null +++ b/opl/opl_obsd.c @@ -0,0 +1,125 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 2009 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. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA +// 02111-1307, USA. +// +// 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 +}; + +#endif /* #ifndef NO_OBSD_DRIVER */ + |