patch-2.1.116 linux/include/asm-alpha/pci.h

• Lines: 49
• Date: Sun Aug 9 12:09:06 1998
• Orig file: v2.1.115/linux/include/asm-alpha/pci.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.115/linux/include/asm-alpha/pci.h linux/include/asm-alpha/pci.h
@@ -0,0 +1,48 @@
+#ifndef __ALPHA_PCI_H
+#define __ALPHA_PCI_H
+
+#include <linux/config.h>
+#include <linux/pci.h>
+
+
+/*
+ * The following structure is used to manage multiple PCI busses.
+ *
+ * XXX: We should solve thos problem in an architecture independant
+ * way, rather than hacking something up here.
+ */
+
+struct linux_hose_info {
+        struct pci_bus                  pci_bus;
+	struct linux_hose_info         *next;
+	unsigned long                   pci_io_space;
+	unsigned long                   pci_mem_space;
+	unsigned long                   pci_config_space;
+	unsigned long                   pci_sparse_space;
+        unsigned int                    pci_first_busno;
+        unsigned int                    pci_last_busno;
+	unsigned int                    pci_hose_index;
+};
+
+/* This is indexed by a pseudo- PCI bus number to obtain the real deal.  */
+extern struct linux_hose_info *bus2hose[256];
+
+/* Create a handle that is OR-ed into the reported I/O space address
+   for a device.  We use this later to find the bus a device lives on.  */
+
+#if defined(CONFIG_ALPHA_GENERIC) \
+    || defined(CONFIG_ALPHA_MCPCIA) \
+    /* || defined(CONFIG_ALPHA_TSUNAMI) */
+
+#define PCI_HANDLE(bus)   ((bus2hose[bus]->pci_hose_index & 3UL) << 32)
+#define DEV_IS_ON_PRIMARY(dev) \
+  (bus2hose[(dev)->bus->number]->pci_first_busno == (dev)->bus->number)
+
+#else
+
+#define PCI_HANDLE(bus)         0
+#define DEV_IS_ON_PRIMARY(dev)  ((dev)->bus->number == 0)
+
+#endif /* Multiple busses */
+
+#endif /* __ALPHA_PCI_H */