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- /* $Id: sbus.h,v 1.10 1998/12/16 04:33:58 davem Exp $
- * sbus.h: Defines for the Sun SBus.
- *
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- */
-
- /* XXX This needs to be mostly redone for sun5 SYSIO. */
-
- #ifndef _SPARC64_SBUS_H
- #define _SPARC64_SBUS_H
-
- #include <asm/oplib.h>
- #include <asm/iommu.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.
- */
-
- extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
- {
- return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
- }
-
- extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
- {
- return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
- }
-
- extern __inline__ unsigned long sbus_dev_offset(unsigned long dev_addr)
- {
- return (unsigned long) (((dev_addr)-SUN_SBUS_BVADDR)&SBUS_OFF_MASK);
- }
-
- struct linux_sbus;
-
- /* Linux SBUS device tables */
- struct linux_sbus_device {
- struct linux_sbus_device *next; /* next device on this SBus or null */
- struct linux_sbus_device *child; /* For ledma and espdma on sun4m */
- struct linux_sbus *my_bus; /* Back ptr to sbus */
- int prom_node; /* PROM device tree node for this device */
- char prom_name[32]; /* PROM device name */
-
- struct linux_prom_registers reg_addrs[PROMREG_MAX];
- int num_registers, ranges_applied;
-
- unsigned int irqs[4];
- int num_irqs;
-
- unsigned long sbus_addr; /* Absolute base address for device. */
- unsigned long sbus_vaddrs[PROMVADDR_MAX];
- unsigned long num_vaddrs;
- unsigned long offset; /* Offset given by PROM */
- int slot;
- };
-
- /* This struct describes the SBus(s) found on this machine. */
- struct linux_sbus {
- struct linux_sbus *next; /* next SBus, if more than one SBus */
- struct linux_sbus_device *devices; /* Link to devices on this SBus */
- struct iommu_struct *iommu; /* IOMMU for this sbus if applicable */
- 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 upaid;
- void *starfire_cookie;
- };
-
- extern struct linux_sbus *SBus_chain;
-
- /* Device probing routines could find these handy */
- #define for_each_sbus(bus) \
- for((bus) = SBus_chain; (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_chain, ((device) = (bus) ? (bus)->devices : 0); (bus); (device)=((device)->next ? (device)->next : ((bus) = (bus)->next, (bus) ? (bus)->devices : 0)))
-
- extern void mmu_set_sbus64(struct linux_sbus_device *, int);
-
- /* If you did not get the buffer from mmu_get_*() or sparc_alloc_dvma()
- * then you must use this to get the 32-bit SBUS dvma address.
- * And in this case it is your responsibility to make sure the buffer
- * is GFP_DMA, ie. that it is not greater than MAX_DMA_ADDRESS.
- */
- extern unsigned long phys_base;
- #define sbus_dvma_addr(__addr) ((__u32)(__pa(__addr) - phys_base))
-
- /* Apply promlib probed SBUS ranges to registers. */
- extern void prom_apply_sbus_ranges(struct linux_sbus *sbus,
- struct linux_prom_registers *sbusregs, int nregs,
- struct linux_sbus_device *sdev);
-
- #endif /* !(_SPARC64_SBUS_H) */
-