arch/avr32/include/asm/setup.h

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * Based on linux/include/asm-arm/setup.h
   5  *   Copyright (C) 1997-1999 Russell 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 #include <uapi/asm/setup.h>
  15
  16
  17 /* Magic number indicating that a tag table is present */
  18 #define ATAG_MAGIC      0xa2a25441
  19
  20 #ifndef __ASSEMBLY__
  21
  22 /*
  23  * Generic memory range, used by several tags.
  24  *
  25  *   addr is always physical.
  26  *   size is measured in bytes.
  27  *   next is for use by the OS, e.g. for grouping regions into
  28  *        linked lists.
  29  */
  30 struct tag_mem_range {
  31         u32                     addr;
  32         u32                     size;
  33         struct tag_mem_range *  next;
  34 };
  35
  36 /* The list ends with an ATAG_NONE node. */
  37 #define ATAG_NONE       0x00000000
  38
  39 struct tag_header {
  40         u32 size;
  41         u32 tag;
  42 };
  43
  44 /* The list must start with an ATAG_CORE node */
  45 #define ATAG_CORE       0x54410001
  46
  47 struct tag_core {
  48         u32 flags;
  49         u32 pagesize;
  50         u32 rootdev;
  51 };
  52
  53 /* it is allowed to have multiple ATAG_MEM nodes */
  54 #define ATAG_MEM        0x54410002
  55 /* ATAG_MEM uses tag_mem_range */
  56
  57 /* command line: \0 terminated string */
  58 #define ATAG_CMDLINE    0x54410003
  59
  60 struct tag_cmdline {
  61         char    cmdline[1];     /* this is the minimum size */
  62 };
  63
  64 /* Ramdisk image (may be compressed) */
  65 #define ATAG_RDIMG      0x54410004
  66 /* ATAG_RDIMG uses tag_mem_range */
  67
  68 /* Information about various clocks present in the system */
  69 #define ATAG_CLOCK      0x54410005
  70
  71 struct tag_clock {
  72         u32     clock_id;       /* Which clock are we talking about? */
  73         u32     clock_flags;    /* Special features */
  74         u64     clock_hz;       /* Clock speed in Hz */
  75 };
  76
  77 /* The clock types we know about */
  78 #define CLOCK_BOOTCPU   0
  79
  80 /* Memory reserved for the system (e.g. the bootloader) */
  81 #define ATAG_RSVD_MEM   0x54410006
  82 /* ATAG_RSVD_MEM uses tag_mem_range */
  83
  84 /* Ethernet information */
  85
  86 #define ATAG_ETHERNET   0x54410007
  87
  88 struct tag_ethernet {
  89         u8      mac_index;
  90         u8      mii_phy_addr;
  91         u8      hw_address[6];
  92 };
  93
  94 #define ETH_INVALID_PHY 0xff
  95
  96 /* board information */
  97 #define ATAG_BOARDINFO  0x54410008
  98
  99 struct tag_boardinfo {
 100         u32     board_number;
 101 };
 102
 103 struct tag {
 104         struct tag_header hdr;
 105         union {
 106                 struct tag_core core;
 107                 struct tag_mem_range mem_range;
 108                 struct tag_cmdline cmdline;
 109                 struct tag_clock clock;
 110                 struct tag_ethernet ethernet;
 111                 struct tag_boardinfo boardinfo;
 112         } u;
 113 };
 114
 115 struct tagtable {
 116         u32     tag;
 117         int     (*parse)(struct tag *);
 118 };
 119
 120 #define __tag __used __attribute__((__section__(".taglist.init")))
 121 #define __tagtable(tag, fn)                                             \
 122         static struct tagtable __tagtable_##fn __tag = { tag, fn }
 123
 124 #define tag_member_present(tag,member)                                  \
 125         ((unsigned long)(&((struct tag *)0L)->member + 1)               \
 126          <= (tag)->hdr.size * 4)
 127
 128 #define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
 129 #define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
 130
 131 #define for_each_tag(t,base)                                            \
 132         for (t = base; t->hdr.size; t = tag_next(t))
 133
 134 extern struct tag *bootloader_tags;
 135
 136 extern resource_size_t fbmem_start;
 137 extern resource_size_t fbmem_size;
 138 extern u32 board_number;
 139
 140 void setup_processor(void);
 141
 142 #endif /* !__ASSEMBLY__ */
 143
 144 #endif /* __ASM_AVR32_SETUP_H__ */