ref: 56383f628bfebc65f96b20fccf3abbf55c4e0925
dir: /opl/opl_obsd.c/
// // 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 */