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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 | */ | |
29 | struct 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 | ||
38 | struct 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 | ||
46 | struct 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 | ||
59 | struct 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 | ||
70 | struct 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 | ||
87 | struct 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 | ||
95 | struct 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 | ||
106 | struct 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 | ||
125 | extern struct tag_mem_range *mem_phys; | |
126 | extern struct tag_mem_range *mem_reserved; | |
127 | extern struct tag_mem_range *mem_ramdisk; | |
128 | ||
129 | extern struct tag *bootloader_tags; | |
130 | ||
131 | extern void setup_bootmem(void); | |
132 | extern void setup_processor(void); | |
133 | extern void board_setup_fbmem(unsigned long fbmem_start, | |
134 | unsigned long fbmem_size); | |
135 | ||
136 | /* Chip-specific hook to enable the use of SDRAM */ | |
137 | void chip_enable_sdram(void); | |
138 | ||
139 | #endif /* !__ASSEMBLY__ */ | |
140 | ||
141 | #endif /* __ASM_AVR32_SETUP_H__ */ |