include/asm-avr32/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 Russel King
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25 #ifndef __ASM_AVR32_SETUP_H__
  26 #define __ASM_AVR32_SETUP_H__
  27
  28 #define COMMAND_LINE_SIZE 256
  29
  30 /* Magic number indicating that a tag table is present */
  31 #define ATAG_MAGIC      0xa2a25441
  32
  33 #ifndef __ASSEMBLY__
  34
  35 /*
  36  * Generic memory range, used by several tags.
  37  *
  38  *   addr is always physical.
  39  *   size is measured in bytes.
  40  *   next is for use by the OS, e.g. for grouping regions into
  41  *        linked lists.
  42  */
  43 struct tag_mem_range {
  44         u32                     addr;
  45         u32                     size;
  46         struct tag_mem_range *  next;
  47 };
  48
  49 /* The list ends with an ATAG_NONE node. */
  50 #define ATAG_NONE       0x00000000
  51
  52 struct tag_header {
  53         u32 size;
  54         u32 tag;
  55 };
  56
  57 /* The list must start with an ATAG_CORE node */
  58 #define ATAG_CORE       0x54410001
  59
  60 struct tag_core {
  61         u32 flags;
  62         u32 pagesize;
  63         u32 rootdev;
  64 };
  65
  66 /* it is allowed to have multiple ATAG_MEM nodes */
  67 #define ATAG_MEM        0x54410002
  68 /* ATAG_MEM uses tag_mem_range */
  69
  70 /* command line: \0 terminated string */
  71 #define ATAG_CMDLINE    0x54410003
  72
  73 struct tag_cmdline {
  74         char    cmdline[1];     /* this is the minimum size */
  75 };
  76
  77 /* Ramdisk image (may be compressed) */
  78 #define ATAG_RDIMG      0x54410004
  79 /* ATAG_RDIMG uses tag_mem_range */
  80
  81 /* Information about various clocks present in the system */
  82 #define ATAG_CLOCK      0x54410005
  83
  84 struct tag_clock {
  85         u32     clock_id;       /* Which clock are we talking about? */
  86         u32     clock_flags;    /* Special features */
  87         u64     clock_hz;       /* Clock speed in Hz */
  88 };
  89
  90 /* The clock types we know about */
  91 #define ACLOCK_BOOTCPU  0       /* The CPU we're booting from */
  92 #define ACLOCK_HSB      1       /* Deprecated */
  93
  94 /* Memory reserved for the system (e.g. the bootloader) */
  95 #define ATAG_RSVD_MEM   0x54410006
  96 /* ATAG_RSVD_MEM uses tag_mem_range */
  97
  98 /* Ethernet information */
  99
 100 #define ATAG_ETHERNET   0x54410007
 101
 102 struct tag_ethernet {
 103         u8      mac_index;
 104         u8      mii_phy_addr;
 105         u8      hw_address[6];
 106 };
 107
 108 #define AETH_INVALID_PHY        0xff
 109
 110 struct tag {
 111         struct tag_header hdr;
 112         union {
 113                 struct tag_core core;
 114                 struct tag_mem_range mem_range;
 115                 struct tag_cmdline cmdline;
 116                 struct tag_clock clock;
 117                 struct tag_ethernet ethernet;
 118         } u;
 119 };
 120
 121 struct tagtable {
 122         u32     tag;
 123         int     (*parse)(struct tag *);
 124 };
 125
 126 #define __tag __attribute_used__ __attribute__((__section__(".taglist")))
 127 #define __tagtable(tag, fn)                                             \
 128         static struct tagtable __tagtable_##fn __tag = { tag, fn }
 129
 130 #define tag_member_present(tag,member)                                  \
 131         ((unsigned long)(&((struct tag *)0L)->member + 1)               \
 132          <= (tag)->hdr.size * 4)
 133
 134 #define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
 135 #define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
 136
 137 #define for_each_tag(t,base)                                            \
 138         for (t = base; t->hdr.size; t = tag_next(t))
 139
 140 #endif /* !__ASSEMBLY__ */
 141
 142 #endif /* __ASM_AVR32_SETUP_H__ */