f2c4583a38
This fixes pci_address_to_pio() to return an unsigned long (to be safe) and fixes a bug in the implementation that caused it to return a bogus IO port number Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
150 lines
4.5 KiB
C
150 lines
4.5 KiB
C
#ifdef __KERNEL__
|
|
#ifndef _ASM_PCI_BRIDGE_H
|
|
#define _ASM_PCI_BRIDGE_H
|
|
|
|
#include <linux/ioport.h>
|
|
#include <linux/pci.h>
|
|
|
|
struct device_node;
|
|
struct pci_controller;
|
|
|
|
/*
|
|
* pci_io_base returns the memory address at which you can access
|
|
* the I/O space for PCI bus number `bus' (or NULL on error).
|
|
*/
|
|
extern void __iomem *pci_bus_io_base(unsigned int bus);
|
|
extern unsigned long pci_bus_io_base_phys(unsigned int bus);
|
|
extern unsigned long pci_bus_mem_base_phys(unsigned int bus);
|
|
|
|
/* Allocate a new PCI host bridge structure */
|
|
extern struct pci_controller* pcibios_alloc_controller(void);
|
|
|
|
/* Helper function for setting up resources */
|
|
extern void pci_init_resource(struct resource *res, unsigned long start,
|
|
unsigned long end, int flags, char *name);
|
|
|
|
/* Get the PCI host controller for a bus */
|
|
extern struct pci_controller* pci_bus_to_hose(int bus);
|
|
|
|
/* 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);
|
|
|
|
/*
|
|
* Structure of a PCI controller (host bridge)
|
|
*/
|
|
struct pci_controller {
|
|
int index; /* PCI domain number */
|
|
struct pci_controller *next;
|
|
struct pci_bus *bus;
|
|
void *arch_data;
|
|
|
|
int first_busno;
|
|
int last_busno;
|
|
int bus_offset;
|
|
|
|
void __iomem *io_base_virt;
|
|
unsigned long io_base_phys;
|
|
|
|
/* Some machines (PReP) have a non 1:1 mapping of
|
|
* the PCI memory space in the CPU bus space
|
|
*/
|
|
unsigned long pci_mem_offset;
|
|
|
|
struct pci_ops *ops;
|
|
volatile unsigned int __iomem *cfg_addr;
|
|
volatile void __iomem *cfg_data;
|
|
/*
|
|
* If set, indirect method will set the cfg_type bit as
|
|
* needed to generate type 1 configuration transactions.
|
|
*/
|
|
int set_cfg_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 mem_resource_count;
|
|
|
|
/* Host bridge I/O and Memory space
|
|
* Used for BAR placement algorithms
|
|
*/
|
|
struct resource io_space;
|
|
struct resource mem_space;
|
|
};
|
|
|
|
static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
|
|
{
|
|
return bus->sysdata;
|
|
}
|
|
|
|
/* These are used for config access before all the PCI probing
|
|
has been done. */
|
|
int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u8 *val);
|
|
int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u16 *val);
|
|
int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u32 *val);
|
|
int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u8 val);
|
|
int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u16 val);
|
|
int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn,
|
|
int where, u32 val);
|
|
|
|
extern void setup_indirect_pci_nomap(struct pci_controller* hose,
|
|
void __iomem *cfg_addr, void __iomem *cfg_data);
|
|
extern void setup_indirect_pci(struct pci_controller* hose,
|
|
u32 cfg_addr, u32 cfg_data);
|
|
extern void setup_grackle(struct pci_controller *hose);
|
|
|
|
extern unsigned char common_swizzle(struct pci_dev *, unsigned char *);
|
|
|
|
/*
|
|
* The following code swizzles for exactly one bridge. The routine
|
|
* common_swizzle below handles multiple bridges. But there are a
|
|
* some boards that don't follow the PCI spec's suggestion so we
|
|
* break this piece out separately.
|
|
*/
|
|
static inline unsigned char bridge_swizzle(unsigned char pin,
|
|
unsigned char idsel)
|
|
{
|
|
return (((pin-1) + idsel) % 4) + 1;
|
|
}
|
|
|
|
/*
|
|
* The following macro is used to lookup irqs in a standard table
|
|
* format for those PPC systems that do not already have PCI
|
|
* interrupts properly routed.
|
|
*/
|
|
/* FIXME - double check this */
|
|
#define PCI_IRQ_TABLE_LOOKUP \
|
|
({ long _ctl_ = -1; \
|
|
if (idsel >= min_idsel && idsel <= max_idsel && pin <= irqs_per_slot) \
|
|
_ctl_ = pci_irq_table[idsel - min_idsel][pin-1]; \
|
|
_ctl_; })
|
|
|
|
/*
|
|
* Scan the buses below a given PCI host bridge and assign suitable
|
|
* resources to all devices found.
|
|
*/
|
|
extern int pciauto_bus_scan(struct pci_controller *, int);
|
|
|
|
#ifdef CONFIG_PCI
|
|
extern unsigned long pci_address_to_pio(phys_addr_t address);
|
|
#else
|
|
static inline unsigned long pci_address_to_pio(phys_addr_t address)
|
|
{
|
|
return (unsigned long)-1;
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
#endif /* __KERNEL__ */
|