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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-sparc/] [sbus.h] - Rev 1772
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/* $Id: sbus.h,v 1.1 2005-12-20 11:32:11 jcastillo 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 <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 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); } 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[64]; /* PROM device name */ char linux_name[64]; /* Name used internally by Linux */ struct linux_prom_registers reg_addrs[PROMREG_MAX]; int num_registers; struct linux_prom_irqs irqs[PROMINTR_MAX]; 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" */ int clock_freq; }; extern struct linux_sbus *SBus_chain; extern inline int sbus_is_slave(struct linux_sbus_device *dev) { /* Have to write this for sun4c's */ return 0; } /* 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) #endif /* !(_SPARC_SBUS_H) */
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