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/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H #define _ASM_MICROBLAZE_PCI_BRIDGE_H #ifdef __KERNEL__ /* */ #include <linux/pci.h> #include <linux/list.h> #include <linux/ioport.h> struct device_node; #ifdef CONFIG_PCI extern struct list_head hose_list; extern int pcibios_vaddr_is_ioport(void __iomem *address); #else static inline int pcibios_vaddr_is_ioport(void __iomem *address) { return 0; } #endif /* * 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 suppress 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 */ }; #ifdef CONFIG_PCI 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; } #endif /* CONFIG_PCI */ /* 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); #endif /* __KERNEL__ */ #endif /* _ASM_MICROBLAZE_PCI_BRIDGE_H */
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