microblaze: Add pci-bridge.h

Add pci-bridge.h for Microblaze. It is based on powerpc header file.
My changes:
I removed PPC_ prefix from constants
Removed ppc64 specifis parts
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/pci-bridge.h

+#ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H
+#define _ASM_MICROBLAZE_PCI_BRIDGE_H
+#ifdef __KERNEL__
+/*
+ * This program 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 of the License, or (at your option) any later version.
+ */
 #include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+
+struct device_node;
+
+enum {
+	/* Force re-assigning all resources (ignore firmware
+	 * setup completely)
+	 */
+	PCI_REASSIGN_ALL_RSRC	= 0x00000001,
+
+	/* Re-assign all bus numbers */
+	PCI_REASSIGN_ALL_BUS	= 0x00000002,
+
+	/* Do not try to assign, just use existing setup */
+	PCI_PROBE_ONLY		= 0x00000004,
+
+	/* Don't bother with ISA alignment unless the bridge has
+	 * ISA forwarding enabled
+	 */
+	PCI_CAN_SKIP_ISA_ALIGN	= 0x00000008,
+
+	/* Enable domain numbers in /proc */
+	PCI_ENABLE_PROC_DOMAINS	= 0x00000010,
+	/* ... except for domain 0 */
+	PCI_COMPAT_DOMAIN_0		= 0x00000020,
+};
+
+/*
+ * Structure of a PCI controller (host bridge)
+ */
+struct pci_controller {
+	struct pci_bus *bus;
+	char is_dynamic;
+	struct device_node *dn;
+	struct list_head list_node;
+	struct device *parent;
+
+	int first_busno;
+	int last_busno;
+
+	int self_busno;
+
+	void __iomem *io_base_virt;
+	resource_size_t io_base_phys;
+
+	resource_size_t pci_io_size;
+
+	/* Some machines (PReP) have a non 1:1 mapping of
+	 * the PCI memory space in the CPU bus space
+	 */
+	resource_size_t pci_mem_offset;
+
+	/* Some machines have a special region to forward the ISA
+	 * "memory" cycles such as VGA memory regions. Left to 0
+	 * if unsupported
+	 */
+	resource_size_t isa_mem_phys;
+	resource_size_t isa_mem_size;
+
+	struct pci_ops *ops;
+	unsigned int __iomem *cfg_addr;
+	void __iomem *cfg_data;
+
+	/*
+	 * Used for variants of PCI indirect handling and possible quirks:
+	 *  SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
+	 *  EXT_REG - provides access to PCI-e extended registers
+	 *  SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS
+	 *   on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
+	 *   to determine which bus number to match on when generating type0
+	 *   config cycles
+	 *  NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
+	 *   hanging if we don't have link and try to do config cycles to
+	 *   anything but the PHB.  Only allow talking to the PHB if this is
+	 *   set.
+	 *  BIG_ENDIAN - cfg_addr is a big endian register
+	 *  BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs
+	 *   on the PLB4.  Effectively disable MRM commands by setting this.
+	 */
+#define INDIRECT_TYPE_SET_CFG_TYPE		0x00000001
+#define INDIRECT_TYPE_EXT_REG		0x00000002
+#define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS	0x00000004
+#define INDIRECT_TYPE_NO_PCIE_LINK		0x00000008
+#define INDIRECT_TYPE_BIG_ENDIAN		0x00000010
+#define INDIRECT_TYPE_BROKEN_MRM		0x00000020
+	u32 indirect_type;
+
+	/* Currently, we limit ourselves to 1 IO range and 3 mem
+	 * ranges since the common pci_bus structure can't handle more
+	 */
+	struct resource io_resource;
+	struct resource mem_resources[3];
+	int global_number;	/* PCI domain number */
+};
+
+static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
+{
+	return bus->sysdata;
+}
+
+static inline int isa_vaddr_is_ioport(void __iomem *address)
+{
+	/* No specific ISA handling on ppc32 at this stage, it
+	 * all goes through PCI
+	 */
+	return 0;
+}
+
+/* These are used for config access before all the PCI probing
+   has been done. */
+extern int early_read_config_byte(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u8 *val);
+extern int early_read_config_word(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u16 *val);
+extern int early_read_config_dword(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u32 *val);
+extern int early_write_config_byte(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u8 val);
+extern int early_write_config_word(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u16 val);
+extern int early_write_config_dword(struct pci_controller *hose, int bus,
+			int dev_fn, int where, u32 val);
+
+extern int early_find_capability(struct pci_controller *hose, int bus,
+				 int dev_fn, int cap);
+
+extern void setup_indirect_pci(struct pci_controller *hose,
+			       resource_size_t cfg_addr,
+			       resource_size_t cfg_data, u32 flags);
+
+/* Get the PCI host controller for an OF device */
+extern struct pci_controller *pci_find_hose_for_OF_device(
+			struct device_node *node);
+
+/* Fill up host controller resources from the OF node */
+extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
+			struct device_node *dev, int primary);
+
+/* Allocate & free a PCI host bridge structure */
+extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
+extern void pcibios_free_controller(struct pci_controller *phb);
+extern void pcibios_setup_phb_resources(struct pci_controller *hose);
+
+#ifdef CONFIG_PCI
+extern unsigned int pci_flags;
+
+static inline void pci_set_flags(int flags)
+{
+	pci_flags = flags;
+}
+
+static inline void pci_add_flags(int flags)
+{
+	pci_flags |= flags;
+}
+
+static inline int pci_has_flag(int flag)
+{
+	return pci_flags & flag;
+}
+
+extern struct list_head hose_list;
+
+extern unsigned long pci_address_to_pio(phys_addr_t address);
+extern int pcibios_vaddr_is_ioport(void __iomem *address);
+#else
+static inline unsigned long pci_address_to_pio(phys_addr_t address)
+{
+	return (unsigned long)-1;
+}
+static inline int pcibios_vaddr_is_ioport(void __iomem *address)
+{
+	return 0;
+}
+
+static inline void pci_set_flags(int flags) { }
+static inline void pci_add_flags(int flags) { }
+static inline int pci_has_flag(int flag)
+{
+	return 0;
+}
+#endif	/* CONFIG_PCI */
+
+#endif	/* __KERNEL__ */
+#endif	/* _ASM_MICROBLAZE_PCI_BRIDGE_H */