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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-sparc64/] [sbus.h] - Blame information for rev 1780

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1 1276 phoenix
/* $Id: sbus.h,v 1.1.1.1 2004-04-15 03:01:06 phoenix Exp $
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 * sbus.h: Defines for the Sun SBus.
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 *
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 * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
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 */
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#ifndef _SPARC64_SBUS_H
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#define _SPARC64_SBUS_H
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#include <linux/ioport.h>
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#include <asm/oplib.h>
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#include <asm/iommu.h>
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#include <asm/scatterlist.h>
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/* We scan which devices are on the SBus using the PROM node device
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 * tree.  SBus devices are described in two different ways.  You can
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 * either get an absolute address at which to access the device, or
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 * you can get a SBus 'slot' number and an offset within that slot.
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 */
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/* The base address at which to calculate device OBIO addresses. */
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#define SUN_SBUS_BVADDR        0x00000000
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#define SBUS_OFF_MASK          0x0fffffff
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/* These routines are used to calculate device address from slot
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 * numbers + offsets, and vice versa.
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 */
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extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
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{
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  return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
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}
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extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
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{
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  return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
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}
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struct sbus_bus;
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/* Linux SBUS device tables */
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struct sbus_dev {
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        struct sbus_bus *bus;   /* Our toplevel parent SBUS     */
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        struct sbus_dev *next;  /* Chain of siblings            */
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        struct sbus_dev *child; /* Chain of children            */
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        struct sbus_dev *parent;/* Parent device if not toplevel*/
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        int prom_node;          /* OBP node of this device      */
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        char prom_name[64];     /* OBP device name property     */
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        int slot;               /* SBUS slot number             */
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        struct resource resource[PROMREG_MAX];
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        struct linux_prom_registers reg_addrs[PROMREG_MAX];
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        int num_registers, ranges_applied;
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        struct linux_prom_ranges device_ranges[PROMREG_MAX];
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        int num_device_ranges;
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        unsigned int irqs[4];
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        int num_irqs;
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};
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/* This struct describes the SBus(s) found on this machine. */
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struct sbus_bus {
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        void                    *iommu;         /* Opaque IOMMU cookie  */
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        struct sbus_dev         *devices;       /* Tree of SBUS devices */
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        struct sbus_bus         *next;          /* Next SBUS in system  */
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        int                     prom_node;      /* OBP node of SBUS     */
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        char                    prom_name[64];  /* Usually "sbus" or "sbi" */
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        int                     clock_freq;
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        struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
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        int num_sbus_ranges;
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        int portid;
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        void *starfire_cookie;
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};
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extern struct sbus_bus *sbus_root;
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/* Device probing routines could find these handy */
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#define for_each_sbus(bus) \
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        for((bus) = sbus_root; (bus); (bus)=(bus)->next)
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#define for_each_sbusdev(device, bus) \
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        for((device) = (bus)->devices; (device); (device)=(device)->next)
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#define for_all_sbusdev(device, bus) \
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        for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
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                for ((device) = (bus)->devices; (device); (device) = (device)->next)
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/* Driver DVMA interfaces. */
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#define sbus_can_dma_64bit(sdev)        (1)
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#define sbus_can_burst64(sdev)          (1)
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extern void sbus_set_sbus64(struct sbus_dev *, int);
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/* These yield IOMMU mappings in consistent mode. */
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extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);
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extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);
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#define SBUS_DMA_BIDIRECTIONAL  0
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#define SBUS_DMA_TODEVICE       1
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#define SBUS_DMA_FROMDEVICE     2
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#define SBUS_DMA_NONE           3
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/* All the rest use streaming mode mappings. */
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extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
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extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
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extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
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extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
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/* Finally, allow explicit synchronization of streamable mappings. */
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extern void sbus_dma_sync_single(struct sbus_dev *, dma_addr_t, size_t, int);
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extern void sbus_dma_sync_sg(struct sbus_dev *, struct scatterlist *, int, int);
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#endif /* !(_SPARC64_SBUS_H) */

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