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/* $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 (
#ifndef _SPARC64_SBUS_H
#define _SPARC64_SBUS_H
#include <linux/dma-mapping.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.
static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
static __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; (bus); (bus) = (bus)->next) \
for ((device) = (bus)->devices; (device); (device) = (device)->next)
/* 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);
/* 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_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
#endif /* !(_SPARC64_SBUS_H) */