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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 (
#ifndef _SPARC_SBUS_H
#define _SPARC_SBUS_H
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <asm/oplib.h>
/* #include <asm/iommu.h> */ /* Unused since we use opaque iommu (|io-unit) */
#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.
static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
static 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;
static 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; (bus); (bus) = (bus)->next) \
for ((device) = (bus)->devices; (device); (device) = (device)->next)
/* 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);
void prom_adjust_ranges(struct linux_prom_ranges *, int,
struct linux_prom_ranges *, int);
/* 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);
/* Eric Brower (
* Translate SBus interrupt levels to ino values--
* this is used when converting sbus "interrupts" OBP
* node values to "intr" node values, and is platform
* dependent. If only we could call OBP with
* "sbus-intr>cpu (sbint -- ino)" from kernel...
* See .../drivers/sbus/sbus.c for details.
BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
#define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
#endif /* !(_SPARC_SBUS_H) */