/* * 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 #define COMMAND_LINE_SIZE 1024 #ifdef __KERNEL__ /* 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 */ /* * this one accidentally used virtual addresses - as such, * its depreciated. */ #define ATAG_INITRD 0x54410005 /* describes where the compressed ramdisk image lives */ #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_used__ __attribute__((__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 /* __KERNEL__ */ #endif