A driver for programming the AGP hardware. This is only very lightly

tested on Intel BX chipsets only. The other agp minidrivers are totally
untested.

The programming api is a subset of the Linux api and is only intended to
be enough for the X server to use. There is also an in-kernel api for the
use of other kernel modules such as the 3D DRI.

1 files changed, 109 insertions, 0 deletions

diff --git a/sys/pci/agpreg.h b/sys/pci/agpreg.h
new file mode 100644
index 0000000..0539325
--- /dev/null
+++ b/sys/pci/agpreg.h
@@ -0,0 +1,109 @@
+/*-
+ * Copyright (c) 2000 Doug Rabson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$FreeBSD$
+ */
+
+#ifndef _PCI_AGPREG_H_
+#define _PCI_AGPREG_H_
+
+/*
+ * Offsets for various AGP configuration registers.
+ */
+#define AGP_APBASE		0x10
+#define AGP_CAPPTR		0x34
+
+/*
+ * Offsets from the AGP Capability pointer.
+ */
+#define AGP_CAPID		0x0
+#define AGP_CAPID_GET_MAJOR(x)		(((x) & 0x00f00000U) >> 20)
+#define AGP_CAPID_GET_MINOR(x)		(((x) & 0x000f0000U) >> 16)
+#define AGP_CAPID_GET_NEXT_PTR(x)	(((x) & 0x0000ff00U) >> 8)
+#define AGP_CAPID_GET_CAP_ID(x)		(((x) & 0x000000ffU) >> 0)
+
+#define AGP_STATUS		0x4
+#define AGP_COMMAND		0x8
+
+/*
+ * Config offsets for Intel AGP chipsets.
+ */
+#define AGP_INTEL_NBXCFG	0x50
+#define AGP_INTEL_ERRSTS	0x91
+#define AGP_INTEL_AGPCTRL	0xb0
+#define AGP_INTEL_APSIZE	0xb4
+#define AGP_INTEL_ATTBASE	0xb8
+
+/*
+ * Config offsets for VIA AGP chipsets.
+ */
+#define AGP_VIA_GARTCTRL	0x80
+#define AGP_VIA_APSIZE		0x84
+#define AGP_VIA_ATTBASE		0x88
+
+/*
+ * Config offsets for SiS AGP chipsets.
+ */
+#define AGP_SIS_ATTBASE		0x90
+#define AGP_SIS_WINCTRL		0x94
+#define AGP_SIS_TLBCTRL		0x97
+#define AGP_SIS_TLBFLUSH	0x98
+
+/*
+ * Config offsets for Ali AGP chipsets.
+ */
+#define AGP_ALI_AGPCTRL		0xb8
+#define AGP_ALI_ATTBASE		0xbc
+#define AGP_ALI_TLBCTRL		0xc0
+
+/*
+ * Config offsets for the AMD 751 chipset.
+ */
+#define AGP_AMD751_REGISTERS	0x14
+#define AGP_AMD751_APCTRL	0xac
+#define AGP_AMD751_MODECTRL	0xb0
+
+/*
+ * Memory mapped register offsets for AMD 751 chipset.
+ */
+#define AGP_AMD751_CAPS		0x00
+#define AGP_AMD751_CAPS_EHI		0x0800
+#define AGP_AMD751_CAPS_P2P		0x0400
+#define AGP_AMD751_CAPS_MPC		0x0200
+#define AGP_AMD751_CAPS_VBE		0x0100
+#define AGP_AMD751_CAPS_REV		0x00ff
+#define AGP_AMD751_STATUS	0x02
+#define AGP_AMD751_STATUS_P2PS		0x0800
+#define AGP_AMD751_STATUS_GCS		0x0400
+#define AGP_AMD751_STATUS_MPS		0x0200
+#define AGP_AMD751_STATUS_VBES		0x0100
+#define AGP_AMD751_STATUS_P2PE		0x0008
+#define AGP_AMD751_STATUS_GCE		0x0004
+#define AGP_AMD751_STATUS_VBEE		0x0001
+#define AGP_AMD751_ATTBASE	0x04
+#define AGP_AMD751_TLBCTRL	0x0c
+
+
+#endif /* !_PCI_AGPREG_H_ */