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