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1 | /* |
2 | * sbus.h: Defines for the Sun SBus. | |
3 | * | |
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
5 | */ | |
6 | ||
7 | #ifndef _SPARC_SBUS_H | |
8 | #define _SPARC_SBUS_H | |
9 | ||
10 | #include <linux/dma-mapping.h> | |
11 | #include <linux/ioport.h> | |
12 | ||
13 | #include <asm/oplib.h> | |
14 | #include <asm/prom.h> | |
15 | #include <asm/of_device.h> | |
16 | #include <asm/scatterlist.h> | |
17 | ||
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. | |
22 | */ | |
23 | ||
24 | /* The base address at which to calculate device OBIO addresses. */ | |
25 | #define SUN_SBUS_BVADDR 0xf8000000 | |
26 | #define SBUS_OFF_MASK 0x01ffffff | |
27 | ||
28 | /* These routines are used to calculate device address from slot | |
29 | * numbers + offsets, and vice versa. | |
30 | */ | |
31 | ||
32 | static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset) | |
33 | { | |
34 | return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset)); | |
35 | } | |
36 | ||
37 | static inline int sbus_dev_slot(unsigned long dev_addr) | |
38 | { | |
39 | return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25); | |
40 | } | |
41 | ||
42 | struct sbus_bus; | |
43 | ||
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; | |
54 | ||
55 | struct resource resource[PROMREG_MAX]; | |
56 | ||
57 | struct linux_prom_registers reg_addrs[PROMREG_MAX]; | |
58 | int num_registers; | |
59 | ||
60 | struct linux_prom_ranges device_ranges[PROMREG_MAX]; | |
61 | int num_device_ranges; | |
62 | ||
63 | unsigned int irqs[4]; | |
64 | int num_irqs; | |
65 | }; | |
66 | #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev) | |
67 | ||
68 | /* This struct describes the SBus(s) found on this machine. */ | |
69 | struct sbus_bus { | |
70 | struct of_device ofdev; | |
71 | struct sbus_dev *devices; /* Link to devices on this SBus */ | |
72 | struct sbus_bus *next; /* next SBus, if more than one SBus */ | |
73 | int prom_node; /* PROM device tree node for this SBus */ | |
74 | char prom_name[64]; /* Usually "sbus" or "sbi" */ | |
75 | int clock_freq; | |
76 | ||
77 | struct linux_prom_ranges sbus_ranges[PROMREG_MAX]; | |
78 | int num_sbus_ranges; | |
79 | ||
80 | int devid; | |
81 | int board; | |
82 | }; | |
83 | #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev) | |
84 | ||
85 | extern struct sbus_bus *sbus_root; | |
86 | ||
87 | static inline int | |
88 | sbus_is_slave(struct sbus_dev *dev) | |
89 | { | |
90 | /* XXX Have to write this for sun4c's */ | |
91 | return 0; | |
92 | } | |
93 | ||
94 | /* Device probing routines could find these handy */ | |
95 | #define for_each_sbus(bus) \ | |
96 | for((bus) = sbus_root; (bus); (bus)=(bus)->next) | |
97 | ||
98 | #define for_each_sbusdev(device, bus) \ | |
99 | for((device) = (bus)->devices; (device); (device)=(device)->next) | |
100 | ||
101 | #define for_all_sbusdev(device, bus) \ | |
102 | for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \ | |
103 | for ((device) = (bus)->devices; (device); (device) = (device)->next) | |
104 | ||
105 | /* Driver DVMA interfaces. */ | |
106 | #define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */ | |
107 | #define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */ | |
108 | extern void sbus_set_sbus64(struct sbus_dev *, int); | |
109 | extern void sbus_fill_device_irq(struct sbus_dev *); | |
110 | ||
111 | /* These yield IOMMU mappings in consistent mode. */ | |
112 | extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp); | |
113 | extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32); | |
114 | void prom_adjust_ranges(struct linux_prom_ranges *, int, | |
115 | struct linux_prom_ranges *, int); | |
116 | ||
117 | #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL | |
118 | #define SBUS_DMA_TODEVICE DMA_TO_DEVICE | |
119 | #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE | |
120 | #define SBUS_DMA_NONE DMA_NONE | |
121 | ||
122 | /* All the rest use streaming mode mappings. */ | |
123 | extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int); | |
124 | extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int); | |
125 | extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int); | |
126 | extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int); | |
127 | ||
128 | /* Finally, allow explicit synchronization of streamable mappings. */ | |
129 | extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int); | |
130 | #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu | |
131 | extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int); | |
132 | extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int); | |
133 | #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu | |
134 | extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int); | |
135 | ||
136 | /* Eric Brower (ebrower@usa.net) | |
137 | * Translate SBus interrupt levels to ino values-- | |
138 | * this is used when converting sbus "interrupts" OBP | |
139 | * node values to "intr" node values, and is platform | |
140 | * dependent. If only we could call OBP with | |
141 | * "sbus-intr>cpu (sbint -- ino)" from kernel... | |
142 | * See .../drivers/sbus/sbus.c for details. | |
143 | */ | |
144 | BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int) | |
145 | #define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint) | |
146 | ||
147 | extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *); | |
148 | extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *); | |
149 | extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *); | |
150 | extern int sbus_arch_preinit(void); | |
151 | extern void sbus_arch_postinit(void); | |
152 | ||
153 | #endif /* !(_SPARC_SBUS_H) */ |