143 lines
5.0 KiB
C
143 lines
5.0 KiB
C
/* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
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* sbus.h: Defines for the Sun SBus.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_SBUS_H
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#define _SPARC_SBUS_H
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#include <linux/dma-mapping.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> */ /* Unused since we use opaque iommu (|io-unit) */
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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 0xf8000000
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#define SBUS_OFF_MASK 0x01ffffff
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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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static 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)<<25)+(offset));
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}
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static inline int sbus_dev_slot(unsigned long dev_addr)
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{
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return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
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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; /* Back ptr to sbus */
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struct sbus_dev *next; /* next device on this SBus or null */
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struct sbus_dev *child; /* For ledma and espdma on sun4m */
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struct sbus_dev *parent; /* Parent device if not toplevel */
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int prom_node; /* PROM device tree node for this device */
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char prom_name[64]; /* PROM device name */
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int slot;
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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; /* Link to devices on this SBus */
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struct sbus_bus *next; /* next SBus, if more than one SBus */
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int prom_node; /* PROM device tree node for this 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 devid;
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int board;
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};
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extern struct sbus_bus *sbus_root;
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static inline int
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sbus_is_slave(struct sbus_dev *dev)
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{
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/* XXX Have to write this for sun4c's */
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return 0;
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}
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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) (0) /* actually, sparc_cpu_model==sun4d */
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#define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
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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 *, long, u32 *dma_addrp);
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extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
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void prom_adjust_ranges(struct linux_prom_ranges *, int,
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struct linux_prom_ranges *, int);
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#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
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#define SBUS_DMA_TODEVICE DMA_TO_DEVICE
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#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
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#define SBUS_DMA_NONE DMA_NONE
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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_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
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#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
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extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
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extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
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#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
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extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
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/* Eric Brower (ebrower@usa.net)
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* Translate SBus interrupt levels to ino values--
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* this is used when converting sbus "interrupts" OBP
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* node values to "intr" node values, and is platform
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* dependent. If only we could call OBP with
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* "sbus-intr>cpu (sbint -- ino)" from kernel...
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* See .../drivers/sbus/sbus.c for details.
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*/
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BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
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#define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
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#endif /* !(_SPARC_SBUS_H) */
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