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/*

 *  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 linux/Documentation/arm/Setup

 *  for more info.

 *

 * NOTE:

 *  This file contains two ways to pass information from the boot

 *  loader to the kernel. The old struct param_struct is deprecated,

 *  but it will be kept in the kernel for 5 years from now

 *  (2001). This will allow boot loaders to convert to the new struct

 *  tag way.

 */

#ifndef __ASMARM_SETUP_H

#define __ASMARM_SETUP_H

/*

 * Usage:

 *  - do not go blindly adding fields, add them at the end

 *  - when adding fields, don't rely on the address until

 *    a patch from me has been released

 *  - unused fields should be zero (for future expansion)

 *  - this structure is relatively short-lived - only

 *    guaranteed to contain useful data in setup_arch()

 */

#define COMMAND_LINE_SIZE 1024

/* This is the old deprecated way to pass parameters to the kernel */

struct param_struct {

    union {

        struct {

            unsigned long page_size;            /*  0 */

            unsigned long nr_pages;             /*  4 */

            unsigned long ramdisk_size;         /*  8 */

            unsigned long flags;                /* 12 */

#define FLAG_READONLY   1

#define FLAG_RDLOAD     4

#define FLAG_RDPROMPT   8

            unsigned long rootdev;              /* 16 */

            unsigned long video_num_cols;       /* 20 */

            unsigned long video_num_rows;       /* 24 */

            unsigned long video_x;              /* 28 */

            unsigned long video_y;              /* 32 */

            unsigned long memc_control_reg;     /* 36 */

            unsigned char sounddefault;         /* 40 */

            unsigned char adfsdrives;           /* 41 */

            unsigned char bytes_per_char_h;     /* 42 */

            unsigned char bytes_per_char_v;     /* 43 */

            unsigned long pages_in_bank[4];     /* 44 */

            unsigned long pages_in_vram;        /* 60 */

            unsigned long initrd_start;         /* 64 */

            unsigned long initrd_size;          /* 68 */

            unsigned long rd_start;             /* 72 */

            unsigned long system_rev;           /* 76 */

            unsigned long system_serial_low;    /* 80 */

            unsigned long system_serial_high;   /* 84 */

            unsigned long mem_fclk_21285;       /* 88 */

        } s;

        char unused[256];

    } u1;

    union {

        char paths[8][128];

        struct {

            unsigned long magic;

            char n[1024 - sizeof(unsigned long)];

        } s;

    } u2;

    char commandline[COMMAND_LINE_SIZE];

};

/*

 * The new way of passing information: a list of tagged entries

 */

/* The list ends with an ATAG_NONE node. */

#define ATAG_NONE       0x00000000

struct tag_header {

        u32 size;

        u32 tag;

};

/* The list must start with an ATAG_CORE node */

#define ATAG_CORE       0x54410001

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

struct tag_mem32 {

        u32     size;

        u32     start;  /* physical start address */

};

/* VGA text type displays */

#define ATAG_VIDEOTEXT  0x54410003

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

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,

 * its depreciated.

 */

#define ATAG_INITRD     0x54410005

/* describes where the compressed ramdisk image lives (physical address) */

#define ATAG_INITRD2    0x54420005

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

struct tag_serialnr {

        u32 low;

        u32 high;

};

/* board revision */

#define ATAG_REVISION   0x54410007

struct tag_revision {

        u32 rev;

};

/* initial values for vesafb-type framebuffers. see struct screen_info

 * in include/linux/tty.h

 */

#define ATAG_VIDEOLFB   0x54410008

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

struct tag_cmdline {

        char    cmdline[1];     /* this is the minimum size */

};

/* acorn RiscPC specific information */

#define ATAG_ACORN      0x41000101

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

struct tag_memclk {

        u32 fmemclk;

};

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;

};

struct tagtable {

        u32 tag;

        int (*parse)(const struct tag *);

};

#define __tag __attribute__((unused, __section__(".taglist")))

#define __tagtable(tag, fn) \

static struct tagtable __tagtable_##fn __tag = { tag, fn }

#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))

/*

 * Memory map description

 */

#define NR_BANKS 8

struct meminfo {

        int nr_banks;

        unsigned long end;

        struct {

                unsigned long start;

                unsigned long size;

                int           node;

        } bank[NR_BANKS];

};

extern struct meminfo meminfo;

#endif