LXR linux/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#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
  97/* board information */
  98#define ATAG_BOARDINFO  0x54410008
  99
 100struct tag_boardinfo {
 101        u32     board_number;
 102};
 103
 104struct tag {
 105        struct tag_header hdr;
 106        union {
 107                struct tag_core core;
 108                struct tag_mem_range mem_range;
 109                struct tag_cmdline cmdline;
 110                struct tag_clock clock;
 111                struct tag_ethernet ethernet;
 112                struct tag_boardinfo boardinfo;
 113        } u;
 114};
 115
 116struct tagtable {
 117        u32     tag;
 118        int     (*parse)(struct tag *);
 119};
 120
 121#define __tag __used __attribute__((__section__(".taglist.init")))
 122#define __tagtable(tag, fn)                                             \
 123        static struct tagtable __tagtable_##fn __tag = { tag, fn }
 124
 125#define tag_member_present(tag,member)                                  \
 126        ((unsigned long)(&((struct tag *)0L)->member + 1)               \
 127         <= (tag)->hdr.size * 4)
 128
 129#define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
 130#define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
 131
 132#define for_each_tag(t,base)                                            \
 133        for (t = base; t->hdr.size; t = tag_next(t))
 134
 135extern struct tag *bootloader_tags;
 136
 137extern resource_size_t fbmem_start;
 138extern resource_size_t fbmem_size;
 139extern u32 board_number;
 140
 141void setup_processor(void);
 142
 143#endif /* !__ASSEMBLY__ */
 144
 145#endif  /*  __KERNEL__  */
 146
 147#endif /* __ASM_AVR32_SETUP_H__ */
 148