libpayload: Support functions for Geode

The Geode video driver will require a number of support functions,
including udelay(), PCI bus walking and MSRs.  This adds those functions
in preparation for the actual code.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3231 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 61 insertions, 0 deletions

diff --git a/payloads/libpayload/include/pci.h b/payloads/libpayload/include/pci.h
new file mode 100644
index 0000000000..32ad3fb96d
--- /dev/null
+++ b/payloads/libpayload/include/pci.h
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2008 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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.
+ */
+
+#ifndef _PCI_H_
+#define _PCI_H_
+
+typedef unsigned short pcidev_t;
+
+#define REG_VENDOR_ID   0x00
+#define REG_DEVICE_ID   0x04
+#define REG_HEADER_TYPE 0x0E
+#define REG_PRIMARY_BUS 0x18
+
+#define HEADER_TYPE_NORMAL  0
+#define HEADER_TYPE_BRIDGE  1
+#define HEADER_TYPE_CARDBUS 2
+
+#define PCIDEV(_b, _d) ((((_b) & 0xFF) << 8) | ((_d) & 0xFF))
+
+#define PCIDEV_BUS(_d) (((_d) >> 8) & 0xFF)
+#define PCIDEV_DEVFN(_d) ((_d) & 0xFF)
+
+#define PCI_ADDR(_bus, _dev, _reg) \
+(0x80000000 | (_bus << 16) | (_dev << 8) | (_reg & ~3))
+
+void pci_read_dword(unsigned int bus, unsigned int devfn,
+		    unsigned int reg, unsigned int *val);
+
+void pci_read_byte(unsigned int bus, unsigned int devfn,
+		   unsigned int reg, unsigned char *val);
+
+int pci_find_device(unsigned short vid, unsigned short did, pcidev_t *dev);
+unsigned int pci_read_resource(pcidev_t dev, int bar);
+
+#endif