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Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -07001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * Based on linux/include/asm-arm/setup.h
5 * Copyright (C) 1997-1999 Russel King
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#ifndef __ASM_AVR32_SETUP_H__
12#define __ASM_AVR32_SETUP_H__
13
14#define COMMAND_LINE_SIZE 256
15
Adrian Bunk7d1362c2006-12-06 20:40:38 -080016#ifdef __KERNEL__
17
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -070018/* Magic number indicating that a tag table is present */
19#define ATAG_MAGIC 0xa2a25441
20
21#ifndef __ASSEMBLY__
22
23/*
24 * Generic memory range, used by several tags.
25 *
26 * addr is always physical.
27 * size is measured in bytes.
28 * next is for use by the OS, e.g. for grouping regions into
29 * linked lists.
30 */
31struct tag_mem_range {
32 u32 addr;
33 u32 size;
34 struct tag_mem_range * next;
35};
36
37/* The list ends with an ATAG_NONE node. */
38#define ATAG_NONE 0x00000000
39
40struct tag_header {
41 u32 size;
42 u32 tag;
43};
44
45/* The list must start with an ATAG_CORE node */
46#define ATAG_CORE 0x54410001
47
48struct tag_core {
49 u32 flags;
50 u32 pagesize;
51 u32 rootdev;
52};
53
54/* it is allowed to have multiple ATAG_MEM nodes */
55#define ATAG_MEM 0x54410002
56/* ATAG_MEM uses tag_mem_range */
57
58/* command line: \0 terminated string */
59#define ATAG_CMDLINE 0x54410003
60
61struct tag_cmdline {
62 char cmdline[1]; /* this is the minimum size */
63};
64
65/* Ramdisk image (may be compressed) */
66#define ATAG_RDIMG 0x54410004
67/* ATAG_RDIMG uses tag_mem_range */
68
69/* Information about various clocks present in the system */
70#define ATAG_CLOCK 0x54410005
71
72struct tag_clock {
73 u32 clock_id; /* Which clock are we talking about? */
74 u32 clock_flags; /* Special features */
75 u64 clock_hz; /* Clock speed in Hz */
76};
77
78/* The clock types we know about */
79#define CLOCK_BOOTCPU 0
80
81/* Memory reserved for the system (e.g. the bootloader) */
82#define ATAG_RSVD_MEM 0x54410006
83/* ATAG_RSVD_MEM uses tag_mem_range */
84
85/* Ethernet information */
86
87#define ATAG_ETHERNET 0x54410007
88
89struct tag_ethernet {
90 u8 mac_index;
91 u8 mii_phy_addr;
92 u8 hw_address[6];
93};
94
95#define ETH_INVALID_PHY 0xff
96
97struct tag {
98 struct tag_header hdr;
99 union {
100 struct tag_core core;
101 struct tag_mem_range mem_range;
102 struct tag_cmdline cmdline;
103 struct tag_clock clock;
104 struct tag_ethernet ethernet;
105 } u;
106};
107
108struct tagtable {
109 u32 tag;
110 int (*parse)(struct tag *);
111};
112
113#define __tag __attribute_used__ __attribute__((__section__(".taglist")))
114#define __tagtable(tag, fn) \
115 static struct tagtable __tagtable_##fn __tag = { tag, fn }
116
117#define tag_member_present(tag,member) \
118 ((unsigned long)(&((struct tag *)0L)->member + 1) \
119 <= (tag)->hdr.size * 4)
120
121#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
122#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
123
124#define for_each_tag(t,base) \
125 for (t = base; t->hdr.size; t = tag_next(t))
126
127extern struct tag_mem_range *mem_phys;
128extern struct tag_mem_range *mem_reserved;
129extern struct tag_mem_range *mem_ramdisk;
130
131extern struct tag *bootloader_tags;
132
133extern void setup_bootmem(void);
134extern void setup_processor(void);
135extern void board_setup_fbmem(unsigned long fbmem_start,
136 unsigned long fbmem_size);
137
138/* Chip-specific hook to enable the use of SDRAM */
139void chip_enable_sdram(void);
140
141#endif /* !__ASSEMBLY__ */
142
Adrian Bunk7d1362c2006-12-06 20:40:38 -0800143#endif /* __KERNEL__ */
144
Haavard Skinnemoen5f97f7f2006-09-25 23:32:13 -0700145#endif /* __ASM_AVR32_SETUP_H__ */