142 lines
4.4 KiB
C
142 lines
4.4 KiB
C
/* 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 */
|