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#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 */
  30struct 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
  39struct 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
  47struct 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
  60struct 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
  71struct 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
  88struct 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
  99struct tag_boardinfo {
 100        u32     board_number;
 101};
 102
 103struct 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
 115struct 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
 134extern struct tag *bootloader_tags;
 135
 136extern resource_size_t fbmem_start;
 137extern resource_size_t fbmem_size;
 138extern u32 board_number;
 139
 140void setup_processor(void);
 141
 142#endif /* !__ASSEMBLY__ */
 143
 144#endif /* __ASM_AVR32_SETUP_H__ */
 145