2 * sbus.h: Defines for the Sun SBus.
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
10 #include <linux/dma-mapping.h>
11 #include <linux/ioport.h>
12 #include <linux/of_device.h>
14 #include <asm/oplib.h>
16 #include <asm/scatterlist.h>
18 /* We scan which devices are on the SBus using the PROM node device
19 * tree. SBus devices are described in two different ways. You can
20 * either get an absolute address at which to access the device, or
21 * you can get a SBus 'slot' number and an offset within that slot.
24 /* The base address at which to calculate device OBIO addresses. */
25 #define SUN_SBUS_BVADDR 0xf8000000
26 #define SBUS_OFF_MASK 0x01ffffff
28 /* These routines are used to calculate device address from slot
29 * numbers + offsets, and vice versa.
32 static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
34 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
37 static inline int sbus_dev_slot(unsigned long dev_addr)
39 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
44 /* Linux SBUS device tables */
46 struct of_device ofdev;
48 struct sbus_dev *next;
49 struct sbus_dev *child;
50 struct sbus_dev *parent;
55 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
57 /* This struct describes the SBus(s) found on this machine. */
59 struct of_device ofdev;
60 struct sbus_dev *devices; /* Link to devices on this SBus */
61 struct sbus_bus *next; /* next SBus, if more than one SBus */
62 int prom_node; /* PROM device tree node for this SBus */
63 char prom_name[64]; /* Usually "sbus" or "sbi" */
66 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
69 sbus_is_slave(struct sbus_dev *dev)
71 /* XXX Have to write this for sun4c's */
75 /* These yield IOMMU mappings in consistent mode. */
76 void prom_adjust_ranges(struct linux_prom_ranges *, int,
77 struct linux_prom_ranges *, int);
79 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
80 extern int sbus_arch_preinit(void);
81 extern void sbus_arch_postinit(void);
83 #endif /* !(_SPARC_SBUS_H) */