---
Makefile | 1 +
hurd/hurd_types.defs | 19 ++-
hurd/hurd_types.h | 1 +
hurd/paths.h | 1 +
hurd/pci_conf.defs | 50 +++++++
hurd/subsystems | 1 +
pci_arbiter/Makefile | 40 ++++++
pci_arbiter/config.h | 5 +
pci_arbiter/main.c | 116 ++++++++++++++++
pci_arbiter/mig-mutate.h | 28 ++++
pci_arbiter/pci_access.c | 51 +++++++
pci_arbiter/pci_access.h | 78 +++++++++++
pci_arbiter/pci_arbiter.h | 46 +++++++
pci_arbiter/pci_conf-ops.c | 90 ++++++++++++
pci_arbiter/x86_pci.c | 331 +++++++++++++++++++++++++++++++++++++++++++++
pci_arbiter/x86_pci.h | 42 ++++++
16 files changed, 899 insertions(+), 1 deletion(-)
create mode 100644 hurd/pci_conf.defs
create mode 100644 pci_arbiter/Makefile
create mode 100644 pci_arbiter/config.h
create mode 100644 pci_arbiter/main.c
create mode 100644 pci_arbiter/mig-mutate.h
create mode 100644 pci_arbiter/pci_access.c
create mode 100644 pci_arbiter/pci_access.h
create mode 100644 pci_arbiter/pci_arbiter.h
create mode 100644 pci_arbiter/pci_conf-ops.c
create mode 100644 pci_arbiter/x86_pci.c
create mode 100644 pci_arbiter/x86_pci.h
diff --git a/Makefile b/Makefile
index 119f130b..a46f0140 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,7 @@ prog-subdirs = auth proc exec term \
init \
devnode \
eth-multiplexer \
+ pci_arbiter
ifeq ($(HAVE_SUN_RPC),yes)
prog-subdirs += nfs nfsd
diff --git a/hurd/hurd_types.defs b/hurd/hurd_types.defs
index 4d7013c8..53fad15c 100644
--- a/hurd/hurd_types.defs
+++ b/hurd/hurd_types.defs
@@ -1,5 +1,5 @@
/* MiG type declarations for Hurd interfaces -*- C -*-
- Copyright (C) 1993,94,95,96,98,2001,02 Free Software Foundation, Inc.
+ Copyright (C) 1993,94,95,96,98,2001,02,17 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
@@ -296,6 +296,23 @@ destructor: INTERRUPT_DESTRUCTOR
#endif
;
+/* PCI arbiter */
+type pci_conf_t = mach_port_copy_send_t
+#ifdef PCI_CONF_INTRAN
+intran: PCI_CONF_INTRAN
+intranpayload: PCI_CONF_INTRAN_PAYLOAD
+#else
+#ifdef HURD_DEFAULT_PAYLOAD_TO_PORT
+intranpayload: pci_conf_t HURD_DEFAULT_PAYLOAD_TO_PORT
+#endif
+#endif
+#ifdef PCI_CONF_OUTTRAN
+outtran: PCI_CONF_OUTTRAN
+#endif
+#ifdef PCI_CONF_DESTRUCTOR
+destructor: PCI_CONF_DESTRUCTOR
+#endif
+;
type proccoll_t = mach_port_copy_send_t;
diff --git a/hurd/hurd_types.h b/hurd/hurd_types.h
index 2960a294..db03ec31 100644
--- a/hurd/hurd_types.h
+++ b/hurd/hurd_types.h
@@ -50,6 +50,7 @@ typedef mach_port_t exec_startup_t;
typedef mach_port_t interrupt_t;
typedef mach_port_t proccoll_t;
typedef mach_port_t ctty_t;
+typedef mach_port_t pci_conf_t;
#include <errno.h> /* Defines `error_t'. */
diff --git a/hurd/paths.h b/hurd/paths.h
index e1b00e90..e4da819a 100644
--- a/hurd/paths.h
+++ b/hurd/paths.h
@@ -30,6 +30,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA
02139, USA. */
#define _SERVERS_PROC _SERVERS "proc"
#define _SERVERS_PASSWORD _SERVERS "password"
#define _SERVERS_DEFPAGER _SERVERS "default-pager"
+#define _SERVERS_PCI_CONF _SERVERS "pci"
/* Directory containing naming points for socket servers.
Entries are named by the string representing the domain number
diff --git a/hurd/pci_conf.defs b/hurd/pci_conf.defs
new file mode 100644
index 00000000..f3eccbb0
--- /dev/null
+++ b/hurd/pci_conf.defs
@@ -0,0 +1,50 @@
+/* Definitions for pci-specific calls
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+subsystem pci_conf 39000;
+
+#include <hurd/hurd_types.defs>
+
+#ifdef PCI_CONF_IMPORTS
+PCI_CONF_IMPORTS
+#endif
+
+INTR_INTERFACE
+
+/* Read 'amount' bytes from B/D/F + 'reg' and store it in 'data' */
+routine pci_conf_read (
+ master: pci_conf_t;
+ bus: int;
+ dev: int;
+ func: int;
+ reg: int;
+ out data: data_t, dealloc;
+ amount: vm_size_t
+);
+
+/* Write 'amount' bytes from 'data' to B/D/F + 'reg' */
+routine pci_conf_write(
+ master: pci_conf_t;
+ bus: int;
+ dev: int;
+ func: int;
+ reg: int;
+ data: data_t;
+ out amount: vm_size_t
+);
diff --git a/hurd/subsystems b/hurd/subsystems
index c05895c2..9518172c 100644
--- a/hurd/subsystems
+++ b/hurd/subsystems
@@ -36,6 +36,7 @@ tape 35000 Special control operations for magtapes
login 36000 Database of logged-in users
pfinet 37000 Internet configuration calls
password 38000 Password checker
+pci_conf 39000 PCI arbiter
<ioctl space> 100000- First subsystem of ioctl class 'f' (lowest class)
tioctl 156000 Ioctl class 't' (terminals)
tioctl 156200 (continued)
diff --git a/pci_arbiter/Makefile b/pci_arbiter/Makefile
new file mode 100644
index 00000000..b152de13
--- /dev/null
+++ b/pci_arbiter/Makefile
@@ -0,0 +1,40 @@
+# Copyright (C) 2017 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Hurd.
+#
+# The GNU Hurd is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2, or (at
+# your option) any later version.
+#
+# The GNU Hurd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
+
+dir = pci_arbiter
+makemode = server
+
+PORTDIR = $(srcdir)/port
+
+SRCS = main.c pci_conf-ops.c pci_access.c x86_pci.c
+MIGSRCS = pci_confServer.c
+OBJS = $(patsubst %.S,%.o,$(patsubst %.c,%.o, $(SRCS) $(MIGSRCS)))
+
+HURDLIBS= trivfs fshelp ports shouldbeinlibc
+
+target = pci_arbiter
+
+include ../Makeconf
+
+CFLAGS += -I$(PORTDIR)/include
+
+CPPFLAGS += -imacros $(srcdir)/config.h
+pci_conf-MIGSFLAGS = -imacros $(srcdir)/mig-mutate.h
+
+# cpp doesn't automatically make dependencies for -imacros dependencies. argh.
+pci_conf_S.h pci_confServer.c: mig-mutate.h
+$(OBJS): config.h
diff --git a/pci_arbiter/config.h b/pci_arbiter/config.h
new file mode 100644
index 00000000..b0d5196d
--- /dev/null
+++ b/pci_arbiter/config.h
@@ -0,0 +1,5 @@
+#define __KERNEL__ 1
+#undef __SMP__
+
+#define _HURD_ 1
+
diff --git a/pci_arbiter/main.c b/pci_arbiter/main.c
new file mode 100644
index 00000000..5c7b868a
--- /dev/null
+++ b/pci_arbiter/main.c
@@ -0,0 +1,116 @@
+/*
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Translator initialization and demuxing */
+
+#include <pci_arbiter.h>
+
+#include <error.h>
+#include <fcntl.h>
+#include <hurd/trivfs.h>
+
+#include <pci_access.h>
+#include <pci_conf_S.h>
+
+int trivfs_fstype = FSTYPE_MISC;
+int trivfs_fsid = 0;
+int trivfs_support_read = 0;
+int trivfs_support_write = 0;
+int trivfs_support_exec = 0;
+int trivfs_allow_open = O_READ | O_WRITE;
+
+void
+trivfs_modify_stat (struct trivfs_protid *cred, io_statbuf_t * st)
+{
+}
+
+error_t
+trivfs_goaway (struct trivfs_control *fsys, int flags)
+{
+ exit (0);
+}
+
+int
+pci_demuxer (mach_msg_header_t * inp, mach_msg_header_t * outp)
+{
+ mig_routine_t routine;
+ if ((routine = pci_conf_server_routine (inp)) ||
+ (routine = NULL, trivfs_demuxer (inp, outp)))
+ {
+ if (routine)
+ (*routine) (inp, outp);
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+int
+main (int argc, char **argv)
+{
+ error_t err;
+ struct stat st;
+ mach_port_t bootstrap;
+
+ pci_bucket = ports_create_bucket ();
+
+ mach_port_allocate (mach_task_self (),
+ MACH_PORT_RIGHT_RECEIVE, &fsys_identity);
+
+ task_get_bootstrap_port (mach_task_self (), &bootstrap);
+ if (bootstrap == MACH_PORT_NULL)
+ error (-1, 0, "Must be started as a translator");
+
+ err = trivfs_add_protid_port_class (&pci_protid_portclass);
+ if (err)
+ error (1, err, "Error creating protid port class");
+
+ err = trivfs_add_control_port_class (&pci_cntl_portclass);
+ if (err)
+ error (1, err, "Error creating control port class");
+
+ /* Reply to our parent */
+ err = trivfs_startup (bootstrap, 0,
+ pci_cntl_portclass,
+ pci_bucket,
+ pci_protid_portclass, pci_bucket, &pcicntl);
+ mach_port_deallocate (mach_task_self (), bootstrap);
+ if (err)
+ {
+ return (-1);
+ }
+
+ /* Initialize status from underlying node. */
+ pci_owner = pci_group = 0;
+ err = io_stat (pcicntl->underlying, &st);
+ if (!err)
+ {
+ pci_owner = st.st_uid;
+ pci_group = st.st_gid;
+ }
+
+ /* Start the PCI system */
+ err = pci_system_init ();
+ if (err)
+ error (1, err, "Error starting the PCI system");
+
+ ports_manage_port_operations_one_thread (pci_bucket, pci_demuxer, 0);
+
+ return 0;
+}
diff --git a/pci_arbiter/mig-mutate.h b/pci_arbiter/mig-mutate.h
new file mode 100644
index 00000000..ca62aafe
--- /dev/null
+++ b/pci_arbiter/mig-mutate.h
@@ -0,0 +1,28 @@
+/*
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ Written by Michael I. Bushnell, p/BSG.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Only CPP macro definitions should go in this file. */
+
+#define PCI_CONF_IMPORTS \
+ import "../libtrivfs/mig-decls.h"; \
+
+#define PCI_CONF_INTRAN trivfs_protid_t trivfs_begin_using_protid (pci_conf_t)
+#define PCI_CONF_INTRAN_PAYLOAD trivfs_protid_t
trivfs_begin_using_protid_payload
+#define PCI_CONF_DESTRUCTOR trivfs_end_using_protid (trivfs_protid_t)
diff --git a/pci_arbiter/pci_access.c b/pci_arbiter/pci_access.c
new file mode 100644
index 00000000..eded1bff
--- /dev/null
+++ b/pci_arbiter/pci_access.c
@@ -0,0 +1,51 @@
+/*
+ * (C) Copyright IBM Corporation 2006
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * PCI access general header.
+ *
+ * Following code is borrowed from libpciaccess:
+ * https://cgit.freedesktop.org/xorg/lib/libpciaccess/
+ */
+
+#include <pci_access.h>
+
+#include <errno.h>
+
+#include <x86_pci.h>
+
+/* Configure PCI parameters */
+int
+pci_system_init (void)
+{
+ int err = ENOSYS;
+
+#ifdef __GNU__
+ err = pci_system_x86_create ();
+#else
+#error "Unsupported OS"
+#endif
+
+ return err;
+}
diff --git a/pci_arbiter/pci_access.h b/pci_arbiter/pci_access.h
new file mode 100644
index 00000000..8735ea77
--- /dev/null
+++ b/pci_arbiter/pci_access.h
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright IBM Corporation 2006
+ * Copyright 2009 Red Hat, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+/*
+ * Copyright (c) 2007 Paulo R. Zanoni, Tiago Vignatti
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/*
+ * PCI access general header.
+ *
+ * Following code is borrowed from libpciaccess:
+ * https://cgit.freedesktop.org/xorg/lib/libpciaccess/
+ */
+
+#ifndef PCI_ACCESS_H
+#define PCI_ACCESS_H
+
+#include <stdint.h>
+
+typedef uint64_t pciaddr_t;
+
+ /* Common interface */
+struct pci_iface
+{
+ int (*read) (unsigned bus, unsigned dev, unsigned func, pciaddr_t reg,
+ void *data, unsigned size);
+ int (*write) (unsigned bus, unsigned dev, unsigned func, pciaddr_t reg,
+ const void *data, unsigned size);
+};
+
+struct pci_iface *pci_ifc;
+
+int pci_system_init (void);
+
+#endif /* PCI_ACCESS_H */
diff --git a/pci_arbiter/pci_arbiter.h b/pci_arbiter/pci_arbiter.h
new file mode 100644
index 00000000..73540e8e
--- /dev/null
+++ b/pci_arbiter/pci_arbiter.h
@@ -0,0 +1,46 @@
+/*
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+ Written by Michael I. Bushnell, p/BSG.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Translator global declarations */
+
+#ifndef PCI_ARBITER_H
+#define PCI_ARBITER_H
+
+#include <hurd/ports.h>
+
+/* Libports stuff */
+struct port_bucket *pci_bucket;
+
+struct port_class *pci_protid_portclass;
+struct port_class *pci_cntl_portclass;
+
+mach_port_t fsys_identity;
+
+/* Trivfs control structure for lwip. */
+struct trivfs_control *pcicntl;
+
+/* Owner of the underlying node. */
+uid_t pci_owner;
+
+/* Group of the underlying node. */
+uid_t pci_group;
+
+#endif /* PCI_ARBITER_H */
diff --git a/pci_arbiter/pci_conf-ops.c b/pci_arbiter/pci_conf-ops.c
new file mode 100644
index 00000000..b532158a
--- /dev/null
+++ b/pci_arbiter/pci_conf-ops.c
@@ -0,0 +1,90 @@
+/*
+ Copyright (C) 2017 Free Software Foundation, Inc.
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/* Implementation of PCI operations */
+
+#include <pci_conf_S.h>
+
+#include <hurd/fshelp.h>
+#include <hurd/trivfs.h>
+
+#include <pci_arbiter.h>
+#include <pci_access.h>
+
+error_t
+S_pci_conf_read (struct trivfs_protid * master, int bus, int dev, int func,
+ int reg, char **data, size_t * datalen,
+ mach_msg_type_number_t amount)
+{
+ error_t err;
+
+ if (!master)
+ return EOPNOTSUPP;
+
+ if (!master->isroot)
+ {
+ struct stat st;
+
+ st.st_uid = pci_owner;
+ st.st_gid = pci_group;
+
+ err = fshelp_isowner (&st, master->user);
+ if (err)
+ return EPERM;
+ }
+
+ if (amount > *datalen)
+ amount = *datalen;
+
+ err = pci_ifc->read (bus, dev, func, reg, *data, amount);
+
+ if (!err)
+ *datalen = amount;
+
+ return err;
+}
+
+error_t
+S_pci_conf_write (struct trivfs_protid * master, int bus, int dev, int func,
+ int reg, char *data, size_t datalen,
+ mach_msg_type_number_t * amount)
+{
+ error_t err;
+
+ if (!master)
+ return EOPNOTSUPP;
+
+ if (!master->isroot)
+ {
+ struct stat st;
+
+ st.st_uid = pci_owner;
+ st.st_gid = pci_group;
+
+ err = fshelp_isowner (&st, master->user);
+ if (err)
+ return EPERM;
+ }
+
+ err = pci_ifc->write (bus, dev, func, reg, data, datalen);
+
+ *amount = datalen;
+
+ return err;
+}
diff --git a/pci_arbiter/x86_pci.c b/pci_arbiter/x86_pci.c
new file mode 100644
index 00000000..abae4938
--- /dev/null
+++ b/pci_arbiter/x86_pci.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright (c) 2009, 2012 Samuel Thibault
+ * Heavily inspired from the freebsd, netbsd, and openbsd backends
+ * (C) Copyright Eric Anholt 2006
+ * (C) Copyright IBM Corporation 2006
+ * Copyright (c) 2008 Juan Romero Pardines
+ * Copyright (c) 2008 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, 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.
+ */
+
+/*
+ * PCI access backend.
+ *
+ * Following code is borrowed from libpciaccess:
+ * https://cgit.freedesktop.org/xorg/lib/libpciaccess/
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <x86_pci.h>
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <string.h>
+#include <strings.h>
+#include <sys/io.h>
+
+#include <pci_access.h>
+
+static int
+x86_enable_io (void)
+{
+ if (!ioperm (0, 0xffff, 1))
+ return 0;
+ return errno;
+}
+
+static int
+x86_disable_io (void)
+{
+ if (!ioperm (0, 0xffff, 0))
+ return 0;
+ return errno;
+}
+
+static int
+pci_system_x86_conf1_probe (void)
+{
+ unsigned long sav;
+ int res = ENODEV;
+
+ outb (0x01, 0xCFB);
+ sav = inl (0xCF8);
+ outl (0x80000000, 0xCF8);
+ if (inl (0xCF8) == 0x80000000)
+ res = 0;
+ outl (sav, 0xCF8);
+
+ return res;
+}
+
+static int
+pci_system_x86_conf1_read (unsigned bus, unsigned dev, unsigned func,
+ pciaddr_t reg, void *data, unsigned size)
+{
+ unsigned addr = 0xCFC + (reg & 3);
+ unsigned long sav;
+ int ret = 0;
+
+ if (bus >= 0x100 || dev >= 32 || func >= 8 || reg >= 0x100 || size > 4
+ || size == 3)
+ return EIO;
+
+ sav = inl (0xCF8);
+ outl (0x80000000 | (bus << 16) | (dev << 11) | (func << 8) | (reg & ~3),
+ 0xCF8);
+ /* NOTE: x86 is already LE */
+ switch (size)
+ {
+ case 1:
+ {
+ uint8_t *val = data;
+ *val = inb (addr);
+ break;
+ }
+ case 2:
+ {
+ uint16_t *val = data;
+ *val = inw (addr);
+ break;
+ }
+ case 4:
+ {
+ uint32_t *val = data;
+ *val = inl (addr);
+ break;
+ }
+ }
+ outl (sav, 0xCF8);
+
+ return ret;
+}
+
+static int
+pci_system_x86_conf1_write (unsigned bus, unsigned dev, unsigned func,
+ pciaddr_t reg, const void *data, unsigned size)
+{
+ unsigned addr = 0xCFC + (reg & 3);
+ unsigned long sav;
+ int ret = 0;
+
+ if (bus >= 0x100 || dev >= 32 || func >= 8 || reg >= 0x100 || size > 4
+ || size == 3)
+ return EIO;
+
+ sav = inl (0xCF8);
+ outl (0x80000000 | (bus << 16) | (dev << 11) | (func << 8) | (reg & ~3),
+ 0xCF8);
+ /* NOTE: x86 is already LE */
+ switch (size)
+ {
+ case 1:
+ {
+ const uint8_t *val = data;
+ outb (*val, addr);
+ break;
+ }
+ case 2:
+ {
+ const uint16_t *val = data;
+ outw (*val, addr);
+ break;
+ }
+ case 4:
+ {
+ const uint32_t *val = data;
+ outl (*val, addr);
+ break;
+ }
+ }
+ outl (sav, 0xCF8);
+
+ return ret;
+}
+
+static int
+pci_system_x86_conf2_probe (void)
+{
+ outb (0, 0xCFB);
+ outb (0, 0xCF8);
+ outb (0, 0xCFA);
+ if (inb (0xCF8) == 0 && inb (0xCFA) == 0)
+ return 0;
+
+ return ENODEV;
+}
+
+static int
+pci_system_x86_conf2_read (unsigned bus, unsigned dev, unsigned func,
+ pciaddr_t reg, void *data, unsigned size)
+{
+ unsigned addr = 0xC000 | dev << 8 | reg;
+ int ret = 0;
+
+ if (bus >= 0x100 || dev >= 16 || func >= 8 || reg >= 0x100)
+ return EIO;
+
+ outb ((func << 1) | 0xF0, 0xCF8);
+ outb (bus, 0xCFA);
+ /* NOTE: x86 is already LE */
+ switch (size)
+ {
+ case 1:
+ {
+ uint8_t *val = data;
+ *val = inb (addr);
+ break;
+ }
+ case 2:
+ {
+ uint16_t *val = data;
+ *val = inw (addr);
+ break;
+ }
+ case 4:
+ {
+ uint32_t *val = data;
+ *val = inl (addr);
+ break;
+ }
+ default:
+ ret = EIO;
+ break;
+ }
+ outb (0, 0xCF8);
+
+ return ret;
+}
+
+static int
+pci_system_x86_conf2_write (unsigned bus, unsigned dev, unsigned func,
+ pciaddr_t reg, const void *data, unsigned size)
+{
+ unsigned addr = 0xC000 | dev << 8 | reg;
+ int ret = 0;
+
+ if (bus >= 0x100 || dev >= 16 || func >= 8 || reg >= 0x100)
+ return EIO;
+
+ outb ((func << 1) | 0xF0, 0xCF8);
+ outb (bus, 0xCFA);
+ /* NOTE: x86 is already LE */
+ switch (size)
+ {
+ case 1:
+ {
+ const uint8_t *val = data;
+ outb (*val, addr);
+ break;
+ }
+ case 2:
+ {
+ const uint16_t *val = data;
+ outw (*val, addr);
+ break;
+ }
+ case 4:
+ {
+ const uint32_t *val = data;
+ outl (*val, addr);
+ break;
+ }
+ default:
+ ret = EIO;
+ break;
+ }
+ outb (0, 0xCF8);
+
+ return ret;
+}
+
+/* Check that this really looks like a PCI configuration. */
+static int
+pci_system_x86_check (struct pci_iface *pci_ifc)
+{
+ int dev;
+ uint16_t class, vendor;
+
+ /* Look on bus 0 for a device that is a host bridge, a VGA card,
+ * or an intel or compaq device. */
+
+ for (dev = 0; dev < 32; dev++)
+ {
+ if (pci_ifc->read (0, dev, 0, PCI_CLASS_DEVICE, &class, sizeof (class)))
+ continue;
+ if (class == PCI_CLASS_BRIDGE_HOST || class == PCI_CLASS_DISPLAY_VGA)
+ return 0;
+ if (pci_ifc->read (0, dev, 0, PCI_VENDOR_ID, &vendor, sizeof (vendor)))
+ continue;
+ if (vendor == PCI_VENDOR_ID_INTEL || class == PCI_VENDOR_ID_COMPAQ)
+ return 0;
+ }
+
+ return ENODEV;
+}
+
+static int
+pci_probe (struct pci_iface *pci_ifc)
+{
+ if (pci_system_x86_conf1_probe () == 0)
+ {
+ pci_ifc->read = pci_system_x86_conf1_read;
+ pci_ifc->write = pci_system_x86_conf1_write;
+ if (pci_system_x86_check (pci_ifc) == 0)
+ return 0;
+ }
+
+ if (pci_system_x86_conf2_probe () == 0)
+ {
+ pci_ifc->read = pci_system_x86_conf2_read;
+ pci_ifc->write = pci_system_x86_conf2_write;
+ if (pci_system_x86_check (pci_ifc) == 0)
+ return 0;
+ }
+
+ return ENODEV;
+}
+
+int
+pci_system_x86_create (void)
+{
+ int ret;
+
+ ret = x86_enable_io ();
+ if (ret)
+ return ret;
+
+ pci_ifc = calloc (1, sizeof (struct pci_iface));
+ if (pci_ifc == NULL)
+ {
+ x86_disable_io ();
+ return ENOMEM;
+ }
+
+ ret = pci_probe (pci_ifc);
+ if (ret)
+ {
+ x86_disable_io ();
+ free (pci_ifc);
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/pci_arbiter/x86_pci.h b/pci_arbiter/x86_pci.h
new file mode 100644
index 00000000..fe507d67
--- /dev/null
+++ b/pci_arbiter/x86_pci.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2009, 2012 Samuel Thibault
+ * Heavily inspired from the freebsd, netbsd, and openbsd backends
+ * (C) Copyright Eric Anholt 2006
+ * (C) Copyright IBM Corporation 2006
+ * Copyright (c) 2008 Juan Romero Pardines
+ * Copyright (c) 2008 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, 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.
+ */
+
+/*
+ * PCI access backend header.
+ *
+ * Following code is borrowed from libpciaccess:
+ * https://cgit.freedesktop.org/xorg/lib/libpciaccess/
+ */
+
+#ifndef X86_PCI_H
+#define X86_PCI_H
+
+#define PCI_VENDOR_ID 0x00
+#define PCI_VENDOR_ID_COMPAQ 0x0e11
+#define PCI_VENDOR_ID_INTEL 0x8086
+
+#define PCI_CLASS_DEVICE 0x0a
+#define PCI_CLASS_DISPLAY_VGA 0x0300
+#define PCI_CLASS_BRIDGE_HOST 0x0600
+
+int pci_system_x86_create (void);
+
+#endif /* X86_PCI_H */
--
2.14.0
