RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / include / asm-sparc / sbus.h
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1 /* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
2 * sbus.h: Defines for the Sun SBus.
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 */
7 #ifndef _SPARC_SBUS_H
8 #define _SPARC_SBUS_H
10 #include <linux/dma-mapping.h>
11 #include <linux/ioport.h>
13 #include <asm/oplib.h>
14 #include <asm/prom.h>
15 #include <asm/of_device.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);
42 struct sbus_bus;
44 /* Linux SBUS device tables */
45 struct sbus_dev {
46 struct of_device ofdev;
47 struct sbus_bus *bus;
48 struct sbus_dev *next;
49 struct sbus_dev *child;
50 struct sbus_dev *parent;
51 int prom_node;
52 char prom_name[64];
53 int slot;
55 struct resource resource[PROMREG_MAX];
57 struct linux_prom_registers reg_addrs[PROMREG_MAX];
58 int num_registers;
60 struct linux_prom_ranges device_ranges[PROMREG_MAX];
61 int num_device_ranges;
63 unsigned int irqs[4];
64 int num_irqs;
66 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
68 /* This struct describes the SBus(s) found on this machine. */
69 struct sbus_bus {
70 struct of_device ofdev;
71 void *iommu; /* Opaque IOMMU cookie */
72 struct sbus_dev *devices; /* Link to devices on this SBus */
73 struct sbus_bus *next; /* next SBus, if more than one SBus */
74 int prom_node; /* PROM device tree node for this SBus */
75 char prom_name[64]; /* Usually "sbus" or "sbi" */
76 int clock_freq;
78 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
79 int num_sbus_ranges;
81 int devid;
82 int board;
84 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
86 extern struct sbus_bus *sbus_root;
88 static inline int
89 sbus_is_slave(struct sbus_dev *dev)
91 /* XXX Have to write this for sun4c's */
92 return 0;
95 /* Device probing routines could find these handy */
96 #define for_each_sbus(bus) \
97 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
99 #define for_each_sbusdev(device, bus) \
100 for((device) = (bus)->devices; (device); (device)=(device)->next)
102 #define for_all_sbusdev(device, bus) \
103 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
104 for ((device) = (bus)->devices; (device); (device) = (device)->next)
106 /* Driver DVMA interfaces. */
107 #define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */
108 #define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
109 extern void sbus_set_sbus64(struct sbus_dev *, int);
110 extern void sbus_fill_device_irq(struct sbus_dev *);
112 /* These yield IOMMU mappings in consistent mode. */
113 extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
114 extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
115 void prom_adjust_ranges(struct linux_prom_ranges *, int,
116 struct linux_prom_ranges *, int);
118 #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
119 #define SBUS_DMA_TODEVICE DMA_TO_DEVICE
120 #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
121 #define SBUS_DMA_NONE DMA_NONE
123 /* All the rest use streaming mode mappings. */
124 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
125 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
126 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
127 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
129 /* Finally, allow explicit synchronization of streamable mappings. */
130 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
131 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
132 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
133 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
134 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
135 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
137 /* Eric Brower (ebrower@usa.net)
138 * Translate SBus interrupt levels to ino values--
139 * this is used when converting sbus "interrupts" OBP
140 * node values to "intr" node values, and is platform
141 * dependent. If only we could call OBP with
142 * "sbus-intr>cpu (sbint -- ino)" from kernel...
143 * See .../drivers/sbus/sbus.c for details.
145 BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
146 #define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
148 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
149 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
150 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
151 extern int sbus_arch_preinit(void);
152 extern void sbus_arch_postinit(void);
154 #endif /* !(_SPARC_SBUS_H) */