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setup.h

/*
 *  linux/include/asm/setup.h
 *
 *  Copyright (C) 1997-1999 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Structure passed to kernel to tell it about the
 *  hardware it's running on.  See Documentation/arm/Setup
 *  for more info.
 */
#ifndef __ASMARM_SETUP_H
#define __ASMARM_SETUP_H

#include <asm/types.h>

#define COMMAND_LINE_SIZE 1024

/* The list ends with an ATAG_NONE node. */
#define ATAG_NONE 0x00000000

00024 struct tag_header {
      __u32 size;
      __u32 tag;
};

/* The list must start with an ATAG_CORE node */
#define ATAG_CORE 0x54410001

00032 struct tag_core {
      __u32 flags;            /* bit 0 = read-only */
      __u32 pagesize;
      __u32 rootdev;
};

/* it is allowed to have multiple ATAG_MEM nodes */
#define ATAG_MEM  0x54410002

00041 struct tag_mem32 {
      __u32 size;
      __u32 start;      /* physical start address */
};

/* VGA text type displays */
#define ATAG_VIDEOTEXT  0x54410003

00049 struct tag_videotext {
      __u8        x;
      __u8        y;
      __u16       video_page;
      __u8        video_mode;
      __u8        video_cols;
      __u16       video_ega_bx;
      __u8        video_lines;
      __u8        video_isvga;
      __u16       video_points;
};

/* describes how the ramdisk will be used in kernel */
#define ATAG_RAMDISK    0x54410004

00064 struct tag_ramdisk {
      __u32 flags;      /* bit 0 = load, bit 1 = prompt */
      __u32 size; /* decompressed ramdisk size in _kilo_ bytes */
      __u32 start;      /* starting block of floppy-based RAM disk image */
};

/* describes where the compressed ramdisk image lives (virtual address) */
/*
 * this one accidentally used virtual addresses - as such,
 * it's deprecated.
 */
#define ATAG_INITRD     0x54410005

/* describes where the compressed ramdisk image lives (physical address) */
#define ATAG_INITRD2    0x54420005

00080 struct tag_initrd {
      __u32 start;      /* physical start address */
      __u32 size; /* size of compressed ramdisk image in bytes */
};

/* board serial number. "64 bits should be enough for everybody" */
#define ATAG_SERIAL     0x54410006

00088 struct tag_serialnr {
      __u32 low;
      __u32 high;
};

/* board revision */
#define ATAG_REVISION   0x54410007

00096 struct tag_revision {
      __u32 rev;
};

/* initial values for vesafb-type framebuffers. see struct screen_info
 * in include/linux/tty.h
 */
#define ATAG_VIDEOLFB   0x54410008

00105 struct tag_videolfb {
      __u16       lfb_width;
      __u16       lfb_height;
      __u16       lfb_depth;
      __u16       lfb_linelength;
      __u32       lfb_base;
      __u32       lfb_size;
      __u8        red_size;
      __u8        red_pos;
      __u8        green_size;
      __u8        green_pos;
      __u8        blue_size;
      __u8        blue_pos;
      __u8        rsvd_size;
      __u8        rsvd_pos;
};

/* command line: \0 terminated string */
#define ATAG_CMDLINE    0x54410009

00125 struct tag_cmdline {
      char  cmdline[1]; /* this is the minimum size */
};

/* acorn RiscPC specific information */
#define ATAG_ACORN      0x41000101

00132 struct tag_acorn {
      __u32 memc_control_reg;
      __u32 vram_pages;
      __u8 sounddefault;
      __u8 adfsdrives;
};

/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
#define ATAG_MEMCLK     0x41000402

00142 struct tag_memclk {
      __u32 fmemclk;
};

00146 struct tag {
      struct tag_header hdr;
      union {
            struct tag_core         core;
            struct tag_mem32  mem;
            struct tag_videotext    videotext;
            struct tag_ramdisk      ramdisk;
            struct tag_initrd initrd;
            struct tag_serialnr     serialnr;
            struct tag_revision     revision;
            struct tag_videolfb     videolfb;
            struct tag_cmdline      cmdline;

            /*
             * Acorn specific
             */
            struct tag_acorn  acorn;

            /*
             * DC21285 specific
             */
            struct tag_memclk memclk;
      } u;
};

00171 struct tagtable {
      __u32 tag;
      int (*parse)(const struct tag *);
};

#define tag_member_present(tag,member)                      \
      ((unsigned long)(&((struct tag *)0L)->member + 1)     \
            <= (tag)->hdr.size * 4)

#define tag_next(t)     ((struct tag *)((__u32 *)(t) + (t)->hdr.size))
#define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)

#define for_each_tag(t,base)        \
      for (t = base; t->hdr.size; t = tag_next(t))

#ifdef __KERNEL__

#define __tag __used __attribute__((__section__(".taglist.init")))
#define __tagtable(tag, fn) \
static struct tagtable __tagtable_##fn __tag = { tag, fn }

/*
 * Memory map description
 */
#ifdef CONFIG_ARCH_LH7A40X
# define NR_BANKS 16
#else
# define NR_BANKS 8
#endif

struct membank {
      unsigned long start;
      unsigned long size;
      int           node;
};

struct meminfo {
      int nr_banks;
      struct membank bank[NR_BANKS];
};

#define for_each_nodebank(iter,mi,no)                 \
      for (iter = 0; iter < mi->nr_banks; iter++)     \
            if (mi->bank[iter].node == no)

#define bank_pfn_start(bank)  __phys_to_pfn((bank)->start)
#define bank_pfn_end(bank)    __phys_to_pfn((bank)->start + (bank)->size)
#define bank_pfn_size(bank)   ((bank)->size >> PAGE_SHIFT)
#define bank_phys_start(bank) (bank)->start
#define bank_phys_end(bank)   ((bank)->start + (bank)->size)
#define bank_phys_size(bank)  (bank)->size

/*
 * Early command line parameters.
 */
struct early_params {
      const char *arg;
      void (*fn)(char **p);
};

#define __early_param(name,fn)                              \
static struct early_params __early_##fn __used              \
__attribute__((__section__(".early_param.init"))) = { name, fn }

#endif  /*  __KERNEL__  */

#endif

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