X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fi386-ports.c;h=4b51c8818f097e67bbbe4e864fc82156c67e461e;hb=f548ecdbccf5effff1f6fb121bbd6a1e49659c5b;hp=a78d98b6f1c005dad3fdf38cd27d460770f43cb5;hpb=ebd85b2c17be73129cc3bb2b4087425ace9d2a48;p=pciutils.git

diff --git a/lib/i386-ports.c b/lib/i386-ports.c
index a78d98b..4b51c88 100644
--- a/lib/i386-ports.c
+++ b/lib/i386-ports.c
@@ -1,45 +1,51 @@
 /*
- *	$Id: i386-ports.c,v 1.2 2000/01/24 15:36:09 mj Exp $
- *
  *	The PCI Library -- Direct Configuration access via i386 Ports
  *
- *	Copyright (c) 1997--1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ *	Copyright (c) 1997--2006 Martin Mares <mj@ucw.cz>
  *
  *	Can be freely distributed and used under the terms of the GNU GPL.
  */
 
+#define _GNU_SOURCE
+
+#include "internal.h"
+
 #include <unistd.h>
 
-#ifdef __GLIBC__
-#include <sys/io.h>
+#if defined(PCI_OS_LINUX)
+#include "i386-io-linux.h"
+#elif defined(PCI_OS_GNU)
+#include "i386-io-hurd.h"
+#elif defined(PCI_OS_SUNOS)
+#include "i386-io-sunos.h"
+#elif defined(PCI_OS_WINDOWS)
+#include "i386-io-windows.h"
 #else
-#include <asm/io.h>
+#error Do not know how to access I/O ports on this OS.
 #endif
 
-#include "internal.h"
-
-static int intel_iopl_set = -1;
+static int conf12_io_enabled = -1;		/* -1=haven't tried, 0=failed, 1=succeeded */
 
 static int
-intel_setup_io(void)
+conf12_setup_io(struct pci_access *a)
 {
-  if (intel_iopl_set < 0)
-    intel_iopl_set = (iopl(3) < 0) ? 0 : 1;
-  return intel_iopl_set;
+  if (conf12_io_enabled < 0)
+    conf12_io_enabled = intel_setup_io(a);
+  return conf12_io_enabled;
 }
 
 static void
 conf12_init(struct pci_access *a)
 {
-  if (!intel_setup_io())
-    a->error("You need to be root to have access to I/O ports.");
+  if (!conf12_setup_io(a))
+    a->error("No permission to access I/O ports (you probably have to be root).");
 }
 
 static void
-conf12_cleanup(struct pci_access * UNUSED a)
+conf12_cleanup(struct pci_access *a UNUSED)
 {
-  iopl(3);
-  intel_iopl_set = -1;
+  if (conf12_io_enabled > 0)
+    conf12_io_enabled = intel_cleanup_io(a);
 }
 
 /*
@@ -89,7 +95,7 @@ conf1_detect(struct pci_access *a)
   unsigned int tmp;
   int res = 0;
 
-  if (!intel_setup_io())
+  if (!conf12_setup_io(a))
     {
       a->debug("...no I/O permission");
       return 0;
@@ -109,6 +115,10 @@ static int
 conf1_read(struct pci_dev *d, int pos, byte *buf, int len)
 {
   int addr = 0xcfc + (pos&3);
+
+  if (pos >= 256)
+    return 0;
+
   outl(0x80000000 | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos&~3), 0xcf8);
 
   switch (len)
@@ -132,6 +142,10 @@ static int
 conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
 {
   int addr = 0xcfc + (pos&3);
+
+  if (pos >= 256)
+    return 0;
+
   outl(0x80000000 | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos&~3), 0xcf8);
 
   switch (len)
@@ -158,7 +172,7 @@ conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
 static int
 conf2_detect(struct pci_access *a)
 {
-  if (!intel_setup_io())
+  if (!conf12_setup_io(a))
     {
       a->debug("...no I/O permission");
       return 0;
@@ -180,6 +194,9 @@ conf2_read(struct pci_dev *d, int pos, byte *buf, int len)
 {
   int addr = 0xc000 | (d->dev << 8) | pos;
 
+  if (pos >= 256)
+    return 0;
+
   if (d->dev >= 16)
     /* conf2 supports only 16 devices per bus */
     return 0;
@@ -209,6 +226,9 @@ conf2_write(struct pci_dev *d, int pos, byte *buf, int len)
 {
   int addr = 0xc000 | (d->dev << 8) | pos;
 
+  if (pos >= 256)
+    return 0;
+
   if (d->dev >= 16)
     d->access->error("conf2_write: only first 16 devices exist.");
   outb((d->func << 1) | 0xf0, 0xcf8);