1/*
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
16#ifdef __KERNEL__
17
18/* 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.init")))
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 *bootloader_tags;
128
129extern resource_size_t fbmem_start;
130extern resource_size_t fbmem_size;
131
132void setup_processor(void);
133
134#endif /* !__ASSEMBLY__ */
135
136#endif  /*  __KERNEL__  */
137
138#endif /* __ASM_AVR32_SETUP_H__ */
139