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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /xorg-server/hw/xfree86/os-support/sco/sco_iop.c
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Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/sco/sco_iop.c')
-rw-r--r--xorg-server/hw/xfree86/os-support/sco/sco_iop.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/sco/sco_iop.c b/xorg-server/hw/xfree86/os-support/sco/sco_iop.c
new file mode 100644
index 000000000..bb8d06d2e
--- /dev/null
+++ b/xorg-server/hw/xfree86/os-support/sco/sco_iop.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2001 by J. Kean Johnston <jkj@caldera.com>
+ *
+ * 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 name J. Kean Johnston not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. J. Kean Johnston makes no
+ * representations about the suitability of this software for any purpose.
+ * It is provided "as is" without express or implied warranty.
+ *
+ * J. KEAN JOHNSTON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL J. KEAN JOHNSTON 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 <xorg-config.h>
+#endif
+
+#include <X11/X.h>
+
+#include "compiler.h"
+
+#define _NEED_SYSI86
+#include "xf86.h"
+#include "xf86Priv.h"
+#include "xf86OSpriv.h"
+#include "xf86_OSlib.h"
+
+
+/***************************************************************************/
+/* I/O Permissions section */
+/***************************************************************************/
+
+/*
+ * There is a right way and a wrong way of doing this. Unfortunately, we
+ * are forced to do it the wrong way. The right way is to be told the range
+ * or ranges of I/O ports the driver(s) need access to, in order to use the
+ * CONS_IOPERM ioctl() to grant access only to those ports we care about.
+ * This way we can guarantee some small level of stability because a driver
+ * does not have access to all ports (which would mean it could play with
+ * the PIT and thus affect scheduling times, or a whole slew of other
+ * nasty things). However, because XFree86 currently only enables or disables
+ * ALL port access, we need to run at IOPL 3, which basically means the
+ * X Server runs at the same level as the kernel. You can image why this is
+ * unsafe. Oh, and this is not a problem unique to OSR5, other OSes are
+ * affected by this as well.
+ *
+ * So, for the time being, we change our IOPL until such time as the XFree86
+ * architecture is changed to allow for tighter control of I/O ports. If and
+ * when it is, then the CONS_ADDIOP/DELIOP ioctl() should be used to enable
+ * or disable access to the desired ports.
+ */
+
+extern long sysi86 (int cmd, ...);
+
+static Bool IOEnabled = FALSE;
+
+_X_EXPORT Bool
+xf86EnableIO(void)
+{
+ if (IOEnabled)
+ return TRUE;
+
+ if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) {
+ xf86Msg(X_WARNING,"Failed to set IOPL for extended I/O\n");
+ return FALSE;
+ }
+
+ IOEnabled = TRUE;
+ return TRUE;
+}
+
+_X_EXPORT void
+xf86DisableIO(void)
+{
+ if (!IOEnabled)
+ return;
+
+ sysi86(SI86V86, V86SC_IOPL, 0);
+ IOEnabled = FALSE;
+}
+
+/***************************************************************************/
+/* Interrupt Handling section */
+/***************************************************************************/
+
+_X_EXPORT Bool
+xf86DisableInterrupts(void)
+{
+ if (!IOEnabled) {
+ if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0)
+ return FALSE;
+ }
+
+#ifdef __GNUC__
+ __asm__ __volatile__("cli");
+#else
+ asm("cli");
+#endif /* __GNUC__ */
+
+ if (!IOEnabled) {
+ sysi86(SI86V86, V86SC_IOPL, PS_IOPL);
+ }
+
+ return(TRUE);
+}
+
+_X_EXPORT void
+xf86EnableInterrupts(void)
+{
+ if (!IOEnabled) {
+ if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0)
+ return;
+ }
+
+#ifdef __GNUC__
+ __asm__ __volatile__("sti");
+#else
+ asm("sti");
+#endif /* __GNUC__ */
+
+ if (!IOEnabled) {
+ sysi86(SI86V86, V86SC_IOPL, PS_IOPL);
+ }
+}