/* * Copyright 1992 by Rich Murphey * 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 Rich Murphey and David Wexelblat * not be used in advertising or publicity pertaining to distribution of * the software without specific, written prior permission. Rich Murphey 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. * * RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL RICH MURPHEY 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 "xf86.h" #include "xf86Priv.h" #include #ifndef __NetBSD__ #include #else #include #include #endif #include "xf86_OSlib.h" #include "xf86OSpriv.h" #if defined(__NetBSD__) && !defined(MAP_FILE) #define MAP_FLAGS MAP_SHARED #else #define MAP_FLAGS (MAP_FILE | MAP_SHARED) #endif #ifndef __NetBSD__ extern unsigned long dense_base(void); #else /* __NetBSD__ */ static struct alpha_bus_window *abw; static int abw_count = -1; static void init_abw(void) { if (abw_count < 0) { abw_count = alpha_bus_getwindows(ALPHA_BUS_TYPE_PCI_MEM, &abw); if (abw_count <= 0) FatalError("init_abw: alpha_bus_getwindows failed\n"); } } static unsigned long dense_base(void) { if (abw_count < 0) init_abw(); /* XXX check abst_flags for ABST_DENSE just to be safe? */ xf86Msg(X_INFO, "dense base = %#lx\n", abw[0].abw_abst.abst_sys_start); /* XXXX */ return abw[0].abw_abst.abst_sys_start; } #endif /* __NetBSD__ */ #define BUS_BASE dense_base() /***************************************************************************/ /* Video Memory Mapping section */ /***************************************************************************/ #ifdef __OpenBSD__ #define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\ "\tin /etc/sysctl.conf and reboot your machine\n" \ "\trefer to xf86(4) for details" #endif static int devMemFd = -1; #ifdef HAS_APERTURE_DRV #define DEV_APERTURE "/dev/xf86" #endif /* * Check if /dev/mem can be mmap'd. If it can't print a warning when * "warn" is TRUE. */ static void checkDevMem(Bool warn) { static Bool devMemChecked = FALSE; int fd; void *base; if (devMemChecked) return; devMemChecked = TRUE; #ifdef HAS_APERTURE_DRV /* Try the aperture driver first */ if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) { /* Try to map a page at the VGA address */ base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE, MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE); if (base != MAP_FAILED) { munmap((caddr_t) base, 4096); devMemFd = fd; xf86Msg(X_INFO, "checkDevMem: using aperture driver %s\n", DEV_APERTURE); return; } else { if (warn) { xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n", DEV_APERTURE, strerror(errno)); } } } #endif if ((fd = open(DEV_MEM, O_RDWR)) >= 0) { /* Try to map a page at the VGA address */ base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE, MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE); if (base != MAP_FAILED) { munmap((caddr_t) base, 4096); devMemFd = fd; return; } else { if (warn) { xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n", DEV_MEM, strerror(errno)); } } } if (warn) { #ifndef HAS_APERTURE_DRV xf86Msg(X_WARNING, "checkDevMem: failed to open/mmap %s (%s)\n", DEV_MEM, strerror(errno)); #else #ifndef __OpenBSD__ xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n" "\t(%s)\n", DEV_APERTURE, DEV_MEM, strerror(errno)); #else /* __OpenBSD__ */ xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n" "\t(%s)\n%s", DEV_APERTURE, DEV_MEM, strerror(errno), SYSCTL_MSG); #endif /* __OpenBSD__ */ #endif xf86ErrorF("\tlinear framebuffer access unavailable\n"); } return; } void xf86OSInitVidMem(VidMemInfoPtr pVidMem) { checkDevMem(TRUE); pVidMem->initialised = TRUE; } #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) extern int ioperm(unsigned long from, unsigned long num, int on); Bool xf86EnableIO() { if (!ioperm(0, 65536, TRUE)) return TRUE; return FALSE; } void xf86DisableIO() { return; } #endif /* __FreeBSD_kernel__ || __OpenBSD__ */ #ifdef USE_ALPHA_PIO Bool xf86EnableIO() { alpha_pci_io_enable(1); return TRUE; } void xf86DisableIO() { alpha_pci_io_enable(0); } #endif /* USE_ALPHA_PIO */ extern int readDense8(void *Base, register unsigned long Offset); extern int readDense16(void *Base, register unsigned long Offset); extern int readDense32(void *Base, register unsigned long Offset); extern void writeDense8(int Value, void *Base, register unsigned long Offset); extern void writeDense16(int Value, void *Base, register unsigned long Offset); extern void writeDense32(int Value, void *Base, register unsigned long Offset); void (*xf86WriteMmio8) (int Value, void *Base, unsigned long Offset) = writeDense8; void (*xf86WriteMmio16) (int Value, void *Base, unsigned long Offset) = writeDense16; void (*xf86WriteMmio32) (int Value, void *Base, unsigned long Offset) = writeDense32; int (*xf86ReadMmio8) (void *Base, unsigned long Offset) = readDense8; int (*xf86ReadMmio16) (void *Base, unsigned long Offset) = readDense16; int (*xf86ReadMmio32) (void *Base, unsigned long Offset) = readDense32;