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/* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
* sbus.h: Defines for the Sun SBus.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_SBUS_H
#define _SPARC_SBUS_H
#include <linux/ioport.h>
#include <asm/oplib.h>
#include <asm/iommu.h>
#include <asm/scatterlist.h>
/* We scan which devices are on the SBus using the PROM node device
* tree. SBus devices are described in two different ways. You can
* either get an absolute address at which to access the device, or
* you can get a SBus 'slot' number and an offset within that slot.
*/
/* The base address at which to calculate device OBIO addresses. */
#define SUN_SBUS_BVADDR 0xf8000000
#define SBUS_OFF_MASK 0x01ffffff
/* These routines are used to calculate device address from slot
* numbers + offsets, and vice versa.
*/
extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
{
return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
}
extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
{
return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
}
struct sbus_bus;
/* Linux SBUS device tables */
struct sbus_dev {
struct sbus_bus *bus; /* Back ptr to sbus */
struct sbus_dev *next; /* next device on this SBus or null */
struct sbus_dev *child; /* For ledma and espdma on sun4m */
struct sbus_dev *parent; /* Parent device if not toplevel */
int prom_node; /* PROM device tree node for this device */
char prom_name[64]; /* PROM device name */
int slot;
struct resource resource[PROMREG_MAX];
struct linux_prom_registers reg_addrs[PROMREG_MAX];
int num_registers, ranges_applied;
struct linux_prom_ranges device_ranges[PROMREG_MAX];
int num_device_ranges;
unsigned int irqs[4];
int num_irqs;
};
/* This struct describes the SBus(s) found on this machine. */
struct sbus_bus {
void *iommu; /* Opaque IOMMU cookie */
struct sbus_dev *devices; /* Link to devices on this SBus */
struct sbus_bus *next; /* next SBus, if more than one SBus */
int prom_node; /* PROM device tree node for this SBus */
char prom_name[64]; /* Usually "sbus" or "sbi" */
int clock_freq;
struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
int num_sbus_ranges;
int devid;
int board;
};
extern struct sbus_bus *sbus_root;
extern __inline__ int
sbus_is_slave(struct sbus_dev *dev)
{
/* XXX Have to write this for sun4c's */
return 0;
}
/* Device probing routines could find these handy */
#define for_each_sbus(bus) \
for((bus) = sbus_root; (bus); (bus)=(bus)->next)
#define for_each_sbusdev(device, bus) \
for((device) = (bus)->devices; (device); (device)=(device)->next)
#define for_all_sbusdev(device, bus) \
for((bus) = sbus_root, ((device) = (bus) ? (bus)->devices : 0); (bus); (device)=((device)->next ? (device)->next : ((bus) = (bus)->next, (bus) ? (bus)->devices : 0)))
/* Driver DVMA interfaces. */
#define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */
#define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
extern void sbus_set_sbus64(struct sbus_dev *, int);
/* These yield IOMMU mappings in consistent mode. */
extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
#define SBUS_DMA_BIDIRECTIONAL 0
#define SBUS_DMA_TODEVICE 1
#define SBUS_DMA_FROMDEVICE 2
#define SBUS_DMA_NONE 3
/* All the rest use streaming mode mappings. */
extern u32 sbus_map_single(struct sbus_dev *, void *, long, int);
extern void sbus_unmap_single(struct sbus_dev *, u32, long, int);
extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
/* Finally, allow explicit synchronization of streamable mappings. */
extern void sbus_dma_sync_single(struct sbus_dev *, u32, long, int);
extern void sbus_dma_sync_sg(struct sbus_dev *, struct scatterlist *, int, int);
#endif /* !(_SPARC_SBUS_H) */
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