Linux kernel mirror (for testing)
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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/* Magic number indicating that a tag table is present */
17#define ATAG_MAGIC 0xa2a25441
18
19#ifndef __ASSEMBLY__
20
21/*
22 * Generic memory range, used by several tags.
23 *
24 * addr is always physical.
25 * size is measured in bytes.
26 * next is for use by the OS, e.g. for grouping regions into
27 * linked lists.
28 */
29struct tag_mem_range {
30 u32 addr;
31 u32 size;
32 struct tag_mem_range * next;
33};
34
35/* The list ends with an ATAG_NONE node. */
36#define ATAG_NONE 0x00000000
37
38struct tag_header {
39 u32 size;
40 u32 tag;
41};
42
43/* The list must start with an ATAG_CORE node */
44#define ATAG_CORE 0x54410001
45
46struct tag_core {
47 u32 flags;
48 u32 pagesize;
49 u32 rootdev;
50};
51
52/* it is allowed to have multiple ATAG_MEM nodes */
53#define ATAG_MEM 0x54410002
54/* ATAG_MEM uses tag_mem_range */
55
56/* command line: \0 terminated string */
57#define ATAG_CMDLINE 0x54410003
58
59struct tag_cmdline {
60 char cmdline[1]; /* this is the minimum size */
61};
62
63/* Ramdisk image (may be compressed) */
64#define ATAG_RDIMG 0x54410004
65/* ATAG_RDIMG uses tag_mem_range */
66
67/* Information about various clocks present in the system */
68#define ATAG_CLOCK 0x54410005
69
70struct tag_clock {
71 u32 clock_id; /* Which clock are we talking about? */
72 u32 clock_flags; /* Special features */
73 u64 clock_hz; /* Clock speed in Hz */
74};
75
76/* The clock types we know about */
77#define CLOCK_BOOTCPU 0
78
79/* Memory reserved for the system (e.g. the bootloader) */
80#define ATAG_RSVD_MEM 0x54410006
81/* ATAG_RSVD_MEM uses tag_mem_range */
82
83/* Ethernet information */
84
85#define ATAG_ETHERNET 0x54410007
86
87struct tag_ethernet {
88 u8 mac_index;
89 u8 mii_phy_addr;
90 u8 hw_address[6];
91};
92
93#define ETH_INVALID_PHY 0xff
94
95struct tag {
96 struct tag_header hdr;
97 union {
98 struct tag_core core;
99 struct tag_mem_range mem_range;
100 struct tag_cmdline cmdline;
101 struct tag_clock clock;
102 struct tag_ethernet ethernet;
103 } u;
104};
105
106struct tagtable {
107 u32 tag;
108 int (*parse)(struct tag *);
109};
110
111#define __tag __attribute_used__ __attribute__((__section__(".taglist")))
112#define __tagtable(tag, fn) \
113 static struct tagtable __tagtable_##fn __tag = { tag, fn }
114
115#define tag_member_present(tag,member) \
116 ((unsigned long)(&((struct tag *)0L)->member + 1) \
117 <= (tag)->hdr.size * 4)
118
119#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
120#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
121
122#define for_each_tag(t,base) \
123 for (t = base; t->hdr.size; t = tag_next(t))
124
125extern struct tag_mem_range *mem_phys;
126extern struct tag_mem_range *mem_reserved;
127extern struct tag_mem_range *mem_ramdisk;
128
129extern struct tag *bootloader_tags;
130
131extern void setup_bootmem(void);
132extern void setup_processor(void);
133extern void board_setup_fbmem(unsigned long fbmem_start,
134 unsigned long fbmem_size);
135
136/* Chip-specific hook to enable the use of SDRAM */
137void chip_enable_sdram(void);
138
139#endif /* !__ASSEMBLY__ */
140
141#endif /* __ASM_AVR32_SETUP_H__ */