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* Header for Microchannel Architecture Bus
* Written by Martin Kolinek, February 1996
#ifndef _LINUX_MCA_H
#define _LINUX_MCA_H
#include <linux/device.h>
#include <asm/mca.h>
extern int MCA_bus;
#define MCA_bus 0
/* This sets up an information callback for /proc/mca/slot?. The
* function is called with the buffer, slot, and device pointer (or
* some equally informative context information, or nothing, if you
* prefer), and is expected to put useful information into the
* buffer. The adapter name, id, and POS registers get printed
* before this is called though, so don't do it again.
* This should be called with a NULL procfn when a module
* unregisters, thus preventing kernel crashes and other such
* nastiness.
typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev);
/* Should only be called by the NMI interrupt handler, this will do some
* fancy stuff to figure out what might have generated a NMI.
extern void mca_handle_nmi(void);
enum MCA_AdapterStatus {
struct mca_device {
u64 dma_mask;
int pos_id;
int slot;
/* index into id_table, set by the bus match routine */
int index;
/* is there a driver installed? 0 - No, 1 - Yes */
int driver_loaded;
/* POS registers */
unsigned char pos[8];
/* if a pseudo adapter of the motherboard, this is the motherboard
* register value to use for setup cycles */
short pos_register;
enum MCA_AdapterStatus status;
/* name of the proc/mca file */
char procname[8];
/* /proc info callback */
MCA_ProcFn procfn;
/* device/context info for proc callback */
void *proc_dev;
struct device dev;
char name[32];
#define to_mca_device(mdev) container_of(mdev, struct mca_device, dev)
struct mca_bus_accessor_functions {
unsigned char (*mca_read_pos)(struct mca_device *, int reg);
void (*mca_write_pos)(struct mca_device *, int reg,
unsigned char byte);
int (*mca_transform_irq)(struct mca_device *, int irq);
int (*mca_transform_ioport)(struct mca_device *,
int region);
void * (*mca_transform_memory)(struct mca_device *,
void *memory);
struct mca_bus {
u64 default_dma_mask;
int number;
struct mca_bus_accessor_functions f;
struct device dev;
char name[32];
#define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev)
struct mca_driver {
const short *id_table;
void *driver_data;
int integrated_id;
struct device_driver driver;
#define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
/* Ongoing supported API functions */
extern struct mca_device *mca_find_device_by_slot(int slot);
extern int mca_system_init(void);
extern struct mca_bus *mca_attach_bus(int);
extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev,
int reg);
extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg);
extern void mca_device_write_pos(struct mca_device *mca_dev, int reg,
unsigned char byte);
extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq);
extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port);
extern void *mca_device_transform_memory(struct mca_device *mca_dev,
void *mem);
extern int mca_device_claimed(struct mca_device *mca_dev);
extern void mca_device_set_claim(struct mca_device *mca_dev, int val);
extern void mca_device_set_name(struct mca_device *mca_dev, const char *name);
static inline char *mca_device_get_name(struct mca_device *mca_dev)
return mca_dev ? mca_dev->name : NULL;
extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev);
extern struct bus_type mca_bus_type;
extern int mca_register_driver(struct mca_driver *drv);
extern int mca_register_driver_integrated(struct mca_driver *, int);
extern void mca_unregister_driver(struct mca_driver *drv);
/* WARNING: only called by the boot time device setup */
extern int mca_register_device(int bus, struct mca_device *mca_dev);
extern void mca_do_proc_init(void);
extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev);
static inline void mca_do_proc_init(void)
static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev)
#endif /* _LINUX_MCA_H */