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Diffstat (limited to 'include/asm-sparc64/sbus.h')
| -rw-r--r-- | include/asm-sparc64/sbus.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/include/asm-sparc64/sbus.h b/include/asm-sparc64/sbus.h new file mode 100644 index 00000000000..48279e10f38 --- /dev/null +++ b/include/asm-sparc64/sbus.h @@ -0,0 +1,122 @@ +/* $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 (davem@redhat.com) + */ + +#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); + +#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL +#define SBUS_DMA_TODEVICE DMA_TO_DEVICE +#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE +#define SBUS_DMA_NONE DMA_NONE + +/* 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) */ |