From 550d67d1ce6e71f6461efc71ca481655da8de763 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Tue, 26 Aug 2008 17:10:20 +0200
Subject: [PATCH] Added a Cygwin port.

Patch by Christopher Voltz, ported to the current tree by me.
---
 README               |  1 +
 lib/Makefile         |  2 +-
 lib/configure        |  9 +++++++++
 lib/i386-io-cygwin.h | 22 ++++++++++++++++++++++
 lib/i386-ports.c     |  2 ++
 5 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 lib/i386-io-cygwin.h

diff --git a/README b/README
index d111b91..4b3cb1a 100644
--- a/README
+++ b/README
@@ -23,6 +23,7 @@ In runs on the following systems:
 	Aix		(via /dev/pci and odmget)
 	GNU Hurd	(direct port access)
 	Windows		(direct port access)
+	CYGWIN		(direct port access)
 
 It should be very easy to add support for other systems as well (volunteers
 wanted; if you want to try that, I'll be very glad to see the patches and
diff --git a/lib/Makefile b/lib/Makefile
index acbd420..31ca1c1 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -66,7 +66,7 @@ $(PCILIBPC): libpci.pc.in
 init.o: init.c $(INCL)
 access.o: access.c $(INCL)
 params.o: params.c $(INCL)
-i386-ports.o: i386-ports.c $(INCL) i386-io-hurd.h i386-io-linux.h i386-io-sunos.h i386-io-windows.h
+i386-ports.o: i386-ports.c $(INCL) i386-io-hurd.h i386-io-linux.h i386-io-sunos.h i386-io-windows.h i386-io-cygwin.h
 proc.o: proc.c $(INCL) pread.h
 sysfs.o: sysfs.c $(INCL) pread.h
 generic.o: generic.c $(INCL)
diff --git a/lib/configure b/lib/configure
index 4861be1..521cd71 100755
--- a/lib/configure
+++ b/lib/configure
@@ -32,6 +32,10 @@ if [ -z "$HOST" ] ; then
 	then
 		sys=freebsd
 	fi
+	if [ "$sys" = "CYGWIN_NT-5.1" ]
+	then
+		sys=cygwin
+	fi
 	HOST=${3:-$cpu-$sys}
 fi
 # CAVEAT: tr on Solaris is a bit weird and the extra [] is otherwise harmless.
@@ -108,6 +112,11 @@ case $sys in
 		echo_n " i386-ports"
 		echo >>$c '#define PCI_HAVE_PM_INTEL_CONF'
 		;;
+	cygwin)
+		echo_n " i386-ports"
+		echo >>$c '#define PCI_HAVE_PM_INTEL_CONF'
+		echo >>$m 'LDLIBS+=-lioperm'
+		;;
         *)
 		echo " Unfortunately, your OS is not supported by the PCI Library"
 		exit 1
diff --git a/lib/i386-io-cygwin.h b/lib/i386-io-cygwin.h
new file mode 100644
index 0000000..4af2f81
--- /dev/null
+++ b/lib/i386-io-cygwin.h
@@ -0,0 +1,22 @@
+/*
+ *	The PCI Library -- Access to i386 I/O ports under Windows with CYGWIN
+ *
+ *	Copyright (c) 1997--2006 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <sys/io.h>
+
+static int
+intel_setup_io(struct pci_access *a UNUSED)
+{
+  return (iopl(3) < 0) ? 0 : 1;
+}
+
+static inline int
+intel_cleanup_io(struct pci_access *a UNUSED)
+{
+  iopl(3);
+  return -1;
+}
diff --git a/lib/i386-ports.c b/lib/i386-ports.c
index 041e47f..666b749 100644
--- a/lib/i386-ports.c
+++ b/lib/i386-ports.c
@@ -20,6 +20,8 @@
 #include "i386-io-sunos.h"
 #elif defined(PCI_OS_WINDOWS)
 #include "i386-io-windows.h"
+#elif defined(PCI_OS_CYGWIN)
+#include "i386-io-cygwin.h"
 #else
 #error Do not know how to access I/O ports on this OS.
 #endif
-- 
2.39.5