/* $Id: sbus.h,v 1.14 2000/02/18 13:50:55 davem Exp $ * sbus.h: Defines for the Sun SBus. * * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com) */#ifndef _SPARC64_SBUS_H#define _SPARC64_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        0x00000000#define SBUS_OFF_MASK          0x0fffffff/* 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)<<28)+(offset));}extern __inline__ int sbus_dev_slot(unsigned long dev_addr){  return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);}struct sbus_bus;/* Linux SBUS device tables */struct sbus_dev {	struct sbus_bus *bus;	/* Our toplevel parent SBUS	*/	struct sbus_dev *next;	/* Chain of siblings		*/	struct sbus_dev *child;	/* Chain of children		*/	struct sbus_dev *parent;/* Parent device if not toplevel*/	int prom_node;		/* OBP node of this device	*/	char prom_name[64];	/* OBP device name property	*/	int slot;		/* SBUS slot number		*/	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;	/* Tree of SBUS devices	*/	struct sbus_bus		*next;		/* Next SBUS in system	*/	int			prom_node;      /* OBP node of 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 portid;	void *starfire_cookie;};extern struct sbus_bus *sbus_root;/* 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)	(1)#define sbus_can_burst64(sdev)		(1)extern void sbus_set_sbus64(struct sbus_dev *, int);/* These yield IOMMU mappings in consistent mode. */extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);#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 dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, 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 *, dma_addr_t, size_t, int);extern void sbus_dma_sync_sg(struct sbus_dev *, struct scatterlist *, int, int);#endif /* !(_SPARC64_SBUS_H) */