sbus.h
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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; (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);
- #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 /* !(_SPARC_SBUS_H) */