/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* linux/include/asm/setup.h
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*
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* Copyright (C) 1997-1999 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Structure passed to kernel to tell it about the
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* hardware it's running on. See Documentation/arm/setup.rst
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* for more info.
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*/
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#ifndef _UAPI__ASMARM_SETUP_H
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#define _UAPI__ASMARM_SETUP_H
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#include <linux/types.h>
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#define COMMAND_LINE_SIZE 2048
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/* The list ends with an ATAG_NONE node. */
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#define ATAG_NONE 0x00000000
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struct tag_header {
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__u32 size;
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__u32 tag;
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};
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/* The list must start with an ATAG_CORE node */
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#define ATAG_CORE 0x54410001
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struct tag_core {
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__u32 flags; /* bit 0 = read-only */
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__u32 pagesize;
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__u32 rootdev;
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};
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/* it is allowed to have multiple ATAG_MEM nodes */
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#define ATAG_MEM 0x54410002
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struct tag_mem32 {
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__u32 size;
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__u32 start; /* physical start address */
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};
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/* VGA text type displays */
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#define ATAG_VIDEOTEXT 0x54410003
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struct tag_videotext {
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__u8 x;
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__u8 y;
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__u16 video_page;
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__u8 video_mode;
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__u8 video_cols;
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__u16 video_ega_bx;
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__u8 video_lines;
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__u8 video_isvga;
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__u16 video_points;
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};
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/* describes how the ramdisk will be used in kernel */
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#define ATAG_RAMDISK 0x54410004
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struct tag_ramdisk {
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__u32 flags; /* bit 0 = load, bit 1 = prompt */
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__u32 size; /* decompressed ramdisk size in _kilo_ bytes */
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__u32 start; /* starting block of floppy-based RAM disk image */
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};
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/* describes where the compressed ramdisk image lives (virtual address) */
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/*
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* this one accidentally used virtual addresses - as such,
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* it's deprecated.
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*/
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#define ATAG_INITRD 0x54410005
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/* describes where the compressed ramdisk image lives (physical address) */
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#define ATAG_INITRD2 0x54420005
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struct tag_initrd {
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__u32 start; /* physical start address */
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__u32 size; /* size of compressed ramdisk image in bytes */
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};
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/* board serial number. "64 bits should be enough for everybody" */
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#define ATAG_SERIAL 0x54410006
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struct tag_serialnr {
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__u32 low;
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__u32 high;
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};
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/* board revision */
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#define ATAG_REVISION 0x54410007
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struct tag_revision {
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__u32 rev;
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};
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/* initial values for vesafb-type framebuffers. see struct screen_info
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* in include/linux/tty.h
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*/
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#define ATAG_VIDEOLFB 0x54410008
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struct tag_videolfb {
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__u16 lfb_width;
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__u16 lfb_height;
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__u16 lfb_depth;
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__u16 lfb_linelength;
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__u32 lfb_base;
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__u32 lfb_size;
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__u8 red_size;
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__u8 red_pos;
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__u8 green_size;
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__u8 green_pos;
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__u8 blue_size;
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__u8 blue_pos;
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__u8 rsvd_size;
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__u8 rsvd_pos;
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};
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/* command line: \0 terminated string */
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#define ATAG_CMDLINE 0x54410009
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struct tag_cmdline {
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char cmdline[1]; /* this is the minimum size */
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};
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/* acorn RiscPC specific information */
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#define ATAG_ACORN 0x41000101
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struct tag_acorn {
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__u32 memc_control_reg;
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__u32 vram_pages;
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__u8 sounddefault;
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__u8 adfsdrives;
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};
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/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
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#define ATAG_MEMCLK 0x41000402
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struct tag_memclk {
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__u32 fmemclk;
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};
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struct tag {
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struct tag_header hdr;
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union {
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struct tag_core core;
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struct tag_mem32 mem;
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struct tag_videotext videotext;
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struct tag_ramdisk ramdisk;
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struct tag_initrd initrd;
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struct tag_serialnr serialnr;
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struct tag_revision revision;
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struct tag_videolfb videolfb;
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struct tag_cmdline cmdline;
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/*
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* Acorn specific
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*/
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struct tag_acorn acorn;
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/*
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* DC21285 specific
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*/
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struct tag_memclk memclk;
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} u;
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};
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struct tagtable {
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__u32 tag;
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int (*parse)(const struct tag *);
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};
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#define tag_member_present(tag,member) \
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((unsigned long)(&((struct tag *)0L)->member + 1) \
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<= (tag)->hdr.size * 4)
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#define tag_next(t) ((struct tag *)((__u32 *)(t) + (t)->hdr.size))
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#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
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#define for_each_tag(t,base) \
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for (t = base; t->hdr.size; t = tag_next(t))
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#endif /* _UAPI__ASMARM_SETUP_H */
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