378 lines
11 KiB
C
378 lines
11 KiB
C
/*
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* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of Rich Murphey and David Wexelblat
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. Rich Murphey and
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* David Wexelblat make no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
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* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include <sys/param.h>
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#ifndef __NetBSD__
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#include <sys/sysctl.h>
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#endif
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
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#include <machine/sysarch.h>
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#endif
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#include "shared/xf86Axp.h"
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#include "xf86_OSlib.h"
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#include "xf86OSpriv.h"
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#if defined(__NetBSD__) && !defined(MAP_FILE)
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#define MAP_FLAGS MAP_SHARED
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#else
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#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
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#endif
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#ifndef __NetBSD__
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extern unsigned long dense_base(void);
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#else /* __NetBSD__ */
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static struct alpha_bus_window *abw;
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static int abw_count = -1;
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static void
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init_abw(void)
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{
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if (abw_count < 0) {
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abw_count = alpha_bus_getwindows(ALPHA_BUS_TYPE_PCI_MEM, &abw);
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if (abw_count <= 0)
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FatalError("init_abw: alpha_bus_getwindows failed\n");
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}
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}
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static unsigned long
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dense_base(void)
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{
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if (abw_count < 0)
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init_abw();
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/* XXX check abst_flags for ABST_DENSE just to be safe? */
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xf86Msg(X_INFO, "dense base = %#lx\n", abw[0].abw_abst.abst_sys_start); /* XXXX */
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return abw[0].abw_abst.abst_sys_start;
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}
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static unsigned long
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memory_base(void)
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{
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if (abw_count < 0)
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init_abw();
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if (abw_count > 0) {
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xf86Msg(X_INFO, "memory base = %#lx\n",
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abw[1].abw_abst.abst_sys_start); /* XXXX */
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return abw[1].abw_abst.abst_sys_start;
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}
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else {
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xf86Msg(X_INFO, "no memory base\n"); /* XXXX */
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return 0;
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}
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}
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#endif /* __NetBSD__ */
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#define BUS_BASE dense_base()
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#define BUS_BASE_BWX memory_base()
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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#ifdef __OpenBSD__
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#define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\
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"\tin /etc/sysctl.conf and reboot your machine\n" \
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"\trefer to xf86(4) for details"
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#endif
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static int devMemFd = -1;
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#ifdef HAS_APERTURE_DRV
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#define DEV_APERTURE "/dev/xf86"
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#endif
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/*
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* Check if /dev/mem can be mmap'd. If it can't print a warning when
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* "warn" is TRUE.
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*/
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static void
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checkDevMem(Bool warn)
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{
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static Bool devMemChecked = FALSE;
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int fd;
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void *base;
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if (devMemChecked)
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return;
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devMemChecked = TRUE;
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#ifdef HAS_APERTURE_DRV
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/* Try the aperture driver first */
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if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) {
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/* Try to map a page at the VGA address */
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base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
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MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
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if (base != MAP_FAILED) {
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munmap((caddr_t) base, 4096);
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devMemFd = fd;
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xf86Msg(X_INFO, "checkDevMem: using aperture driver %s\n",
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DEV_APERTURE);
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return;
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}
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else {
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if (warn) {
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xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
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DEV_APERTURE, strerror(errno));
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}
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}
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}
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#endif
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if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
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/* Try to map a page at the VGA address */
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base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
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MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
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if (base != MAP_FAILED) {
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munmap((caddr_t) base, 4096);
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devMemFd = fd;
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return;
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}
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else {
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if (warn) {
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xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
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DEV_MEM, strerror(errno));
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}
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}
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}
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if (warn) {
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#ifndef HAS_APERTURE_DRV
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xf86Msg(X_WARNING, "checkDevMem: failed to open/mmap %s (%s)\n",
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DEV_MEM, strerror(errno));
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#else
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#ifndef __OpenBSD__
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xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
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"\t(%s)\n", DEV_APERTURE, DEV_MEM, strerror(errno));
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#else /* __OpenBSD__ */
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xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
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"\t(%s)\n%s", DEV_APERTURE, DEV_MEM, strerror(errno),
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SYSCTL_MSG);
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#endif /* __OpenBSD__ */
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#endif
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xf86ErrorF("\tlinear framebuffer access unavailable\n");
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}
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return;
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}
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void
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xf86OSInitVidMem(VidMemInfoPtr pVidMem)
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{
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checkDevMem(TRUE);
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pVidMem->linearSupported = useDevMem;
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if (has_bwx()) {
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xf86Msg(X_PROBED, "Machine type has 8/16 bit access\n");
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pVidMem->mapMem = mapVidMem;
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pVidMem->unmapMem = unmapVidMem;
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}
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else {
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xf86Msg(X_PROBED, "Machine needs sparse mapping\n");
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pVidMem->mapMem = mapVidMemSparse;
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pVidMem->unmapMem = unmapVidMemSparse;
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#ifndef __NetBSD__
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if (axpSystem == -1)
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axpSystem = bsdGetAXP();
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hae_thresh = xf86AXPParams[axpSystem].hae_thresh;
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hae_mask = xf86AXPParams[axpSystem].hae_mask;
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#endif /* __NetBSD__ */
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}
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pVidMem->initialised = TRUE;
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}
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static void *
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mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
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{
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void *base;
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checkDevMem(FALSE);
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Base = Base & ((1L << 32) - 1);
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if (useDevMem) {
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if (devMemFd < 0) {
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FatalError("xf86MapVidMem: failed to open %s (%s)\n",
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DEV_MEM, strerror(errno));
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}
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base = mmap((caddr_t) 0, Size,
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(flags & VIDMEM_READONLY) ?
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PROT_READ : (PROT_READ | PROT_WRITE),
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MAP_FLAGS, devMemFd, (off_t) Base + BUS_BASE_BWX);
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if (base == MAP_FAILED) {
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FatalError("%s: could not mmap %s [s=%lx,a=%lx] (%s)\n",
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"xf86MapVidMem", DEV_MEM, Size, Base, strerror(errno));
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}
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return base;
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}
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/* else, mmap /dev/vga */
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if ((unsigned long) Base < 0xA0000 || (unsigned long) Base >= 0xC0000) {
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FatalError("%s: Address 0x%lx outside allowable range\n",
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"xf86MapVidMem", Base);
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}
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base = mmap(0, Size,
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(flags & VIDMEM_READONLY) ?
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PROT_READ : (PROT_READ | PROT_WRITE),
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MAP_FLAGS, xf86Info.consoleFd, (unsigned long) Base + BUS_BASE);
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if (base == MAP_FAILED) {
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FatalError("xf86MapVidMem: Could not mmap /dev/vga (%s)\n",
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strerror(errno));
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}
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return base;
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}
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static void
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unmapVidMem(int ScreenNum, void *Base, unsigned long Size)
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{
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munmap((caddr_t) Base, Size);
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}
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/*
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* Read BIOS via mmap()ing DEV_MEM
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*/
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_X_EXPORT int
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xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
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int Len)
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{
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unsigned char *ptr;
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int psize;
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int mlen;
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checkDevMem(TRUE);
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if (devMemFd == -1) {
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return -1;
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}
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psize = getpagesize();
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Offset += Base & (psize - 1);
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Base &= ~(psize - 1);
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mlen = (Offset + Len + psize - 1) & ~(psize - 1);
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ptr = (unsigned char *) mmap((caddr_t) 0, mlen, PROT_READ,
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MAP_SHARED, devMemFd, (off_t) Base + BUS_BASE);
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if ((long) ptr == -1) {
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xf86Msg(X_WARNING,
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"xf86ReadBIOS: %s mmap[s=%x,a=%lx,o=%lx] failed (%s)\n",
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DEV_MEM, Len, Base, Offset, strerror(errno));
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return -1;
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}
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#ifdef DEBUG
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xf86MsgVerb(X_INFO, 3,
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"xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n", Base,
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ptr[0] | (ptr[1] << 8));
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#endif
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(void) memcpy(Buf, (void *) (ptr + Offset), Len);
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(void) munmap((caddr_t) ptr, mlen);
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#ifdef DEBUG
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xf86MsgVerb(X_INFO, 3, "xf86ReadBIOS(%x, %x, Buf, %x)"
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"-> %02x %02x %02x %02x...\n",
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Base, Offset, Len, Buf[0], Buf[1], Buf[2], Buf[3]);
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#endif
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return Len;
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}
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
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extern int ioperm(unsigned long from, unsigned long num, int on);
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_X_EXPORT Bool
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xf86EnableIO()
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{
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if (!ioperm(0, 65536, TRUE))
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return TRUE;
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return FALSE;
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}
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_X_EXPORT void
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xf86DisableIO()
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{
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return;
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}
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#endif /* __FreeBSD_kernel__ || __OpenBSD__ */
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#ifdef USE_ALPHA_PIO
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Bool
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xf86EnableIO()
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{
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alpha_pci_io_enable(1);
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return TRUE;
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}
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void
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xf86DisableIO()
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{
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alpha_pci_io_enable(0);
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}
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#endif /* USE_ALPHA_PIO */
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extern int readDense8(void *Base, register unsigned long Offset);
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extern int readDense16(void *Base, register unsigned long Offset);
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extern int readDense32(void *Base, register unsigned long Offset);
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extern void
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writeDense8(int Value, void *Base, register unsigned long Offset);
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extern void
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writeDense16(int Value, void *Base, register unsigned long Offset);
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extern void
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writeDense32(int Value, void *Base, register unsigned long Offset);
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void (*xf86WriteMmio8) (int Value, void *Base, unsigned long Offset)
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= writeDense8;
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void (*xf86WriteMmio16) (int Value, void *Base, unsigned long Offset)
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= writeDense16;
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void (*xf86WriteMmio32) (int Value, void *Base, unsigned long Offset)
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= writeDense32;
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int (*xf86ReadMmio8) (void *Base, unsigned long Offset)
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= readDense8;
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int (*xf86ReadMmio16) (void *Base, unsigned long Offset)
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= readDense16;
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int (*xf86ReadMmio32) (void *Base, unsigned long Offset)
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= readDense32;
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/*
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* Do all things that need root privileges early
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* and revoke those priviledges
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*/
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_X_EXPORT void
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xf86PrivilegedInit(void)
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{
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xf86EnableIO();
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checkDevMem(TRUE);
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pci_system_init();
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xf86OpenConsole();
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}
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