/* * Copyright 1992 by Orest Zborowski * Copyright 1993 by David Wexelblat * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the names of Orest Zborowski and David Wexelblat * not be used in advertising or publicity pertaining to distribution of * the software without specific, written prior permission. Orest Zborowski * and David Wexelblat make no representations about the suitability of this * software for any purpose. It is provided "as is" without express or * implied warranty. * * OREST ZBOROWSKI AND DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL OREST ZBOROWSKI OR DAVID WEXELBLAT BE LIABLE * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #ifdef HAVE_XORG_CONFIG_H #include #endif #include #include #include #include "input.h" #include "scrnintstr.h" #include "xf86.h" #include "xf86Priv.h" #include "xf86_OSlib.h" #include "xf86OSpriv.h" static Bool ExtendedEnabled = FALSE; #ifdef __ia64__ #include "compiler.h" #include #elif !defined(__powerpc__) && \ !defined(__mc68000__) && \ !defined(__sparc__) && \ !defined(__mips__) && \ !defined(__nds32__) && \ !defined(__arm__) && \ !defined(__aarch64__) && \ !defined(__arc__) && \ !defined(__xtensa__) /* * Due to conflicts with "compiler.h", don't rely on to declare * these. */ extern int ioperm(unsigned long __from, unsigned long __num, int __turn_on); extern int iopl(int __level); #endif /***************************************************************************/ /* Video Memory Mapping section */ /***************************************************************************/ void xf86OSInitVidMem(VidMemInfoPtr pVidMem) { pVidMem->initialised = TRUE; } /***************************************************************************/ /* I/O Permissions section */ /***************************************************************************/ #if defined(__powerpc__) volatile unsigned char *ioBase = NULL; #ifndef __NR_pciconfig_iobase #define __NR_pciconfig_iobase 200 #endif static Bool hwEnableIO(void) { int fd; unsigned int ioBase_phys = syscall(__NR_pciconfig_iobase, 2, 0, 0); fd = open("/dev/mem", O_RDWR); if (ioBase == NULL) { ioBase = (volatile unsigned char *) mmap(0, 0x20000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, ioBase_phys); } close(fd); return ioBase != MAP_FAILED; } static void hwDisableIO(void) { munmap(ioBase, 0x20000); ioBase = NULL; } #elif defined(__i386__) || defined(__x86_64__) || defined(__ia64__) || \ defined(__alpha__) static Bool hwEnableIO(void) { short i; size_t n=0; int begin, end; char *buf=NULL, target[5]; FILE *fp; if (ioperm(0, 1024, 1)) { ErrorF("xf86EnableIO: failed to enable I/O ports 0000-03ff (%s)\n", strerror(errno)); return FALSE; } #if !defined(__alpha__) target[4] = '\0'; /* trap access to the keyboard controller(s) and timer chip(s) */ fp = fopen("/proc/ioports", "r"); while (getline(&buf, &n, fp) != -1) { if ((strstr(buf, "keyboard") != NULL) || (strstr(buf, "timer") != NULL)) { for (i=0; i<4; i++) target[i] = buf[i+2]; begin = atoi(target); for (i=0; i<4; i++) target[i] = buf[i+7]; end = atoi(target); ioperm(begin, end-begin+1, 0); } } free(buf); fclose(fp); #endif return TRUE; } static void hwDisableIO(void) { iopl(0); ioperm(0, 1024, 0); } #else /* non-IO architectures */ #define hwEnableIO() TRUE #define hwDisableIO() do {} while (0) #endif Bool xf86EnableIO(void) { if (ExtendedEnabled) return TRUE; ExtendedEnabled = hwEnableIO(); return ExtendedEnabled; } void xf86DisableIO(void) { if (!ExtendedEnabled) return; hwDisableIO(); ExtendedEnabled = FALSE; }