Date: Thu, 14 Jun 2012 14:38:55 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r237069 - head/sys/arm/include Message-ID: <201206141438.q5EEctPq000241@svn.freebsd.org>
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Author: imp Date: Thu Jun 14 14:38:55 2012 New Revision: 237069 URL: http://svn.freebsd.org/changeset/base/237069 Log: Defines for parsing linux ATAGs lists. Added: head/sys/arm/include/atags.h (contents, props changed) Added: head/sys/arm/include/atags.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/include/atags.h Thu Jun 14 14:38:55 2012 (r237069) @@ -0,0 +1,129 @@ +/*- + * Copyright (c) 2012 M. Warner Losh. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef __MACHINE_ATAGS_H__ +#define __MACHINE_ATAGS_H__ + +/* + * Linux boot ABI compatable ATAG definitions. All these structures + * assume tight packing, but since they are all uint32_t's, I've not + * bothered to do the usual alignment dance. + */ + +#define LBABI_MAX_COMMAND_LINE 1024 + +struct arm_lbabi_header +{ + uint32_t size; /* Size of this node, including header */ + uint32_t tag; /* Node type */ +}; + +#define ATAG_NONE 0x00000000 /* End of atags list */ +#define ATAG_CORE 0x54410001 /* List must start with ATAG_CORE */ +#define ATAG_MEM 0x54410002 /* Multiple ATAG_MEM nodes possible */ +#define ATAG_VIDEOTEXT 0x54410003 /* Video parameters */ +#define ATAG_RAMDISK 0x54410004 /* Describes the ramdisk parameters */ +#define ATAG_INITRD 0x54410005 /* Deprecated ramdisk -- used va not pa */ +#define ATAG_INITRD2 0x54420005 /* compressed ramdisk image */ +#define ATAG_SERIAL 0x54410006 /* 64-bits of serial number */ +#define ATAG_REVISION 0x54410007 /* Board revision */ +#define ATAG_VIDEOLFB 0x54410008 /* vesafb framebuffer */ +#define ATAG_CMDLINE 0x54410009 /* Command line */ + +/* + * ATAG_CORE data + */ +struct arm_lbabi_core +{ + uint32_t flags; /* bit 0 == read-only */ + uint32_t pagesize; + uint32_t rootdev; +}; + +/* + * ATAG_MEM data -- Can be more than one to describe different + * banks. + */ +struct arm_lbabi_mem32 +{ + uint32_t size; + uint32_t start; /* start of physical memory */ +}; + +/* + * ATAG_INITRD2 - Compressed ramdisk image details + */ +struct arm_lbabi_initrd +{ + uint32_t start; /* pa of start */ + uint32_t size; /* How big the ram disk is */ +}; + +/* + * ATAG_SERIAL - serial number + */ +struct arm_lbabi_serial_number +{ + uint32_t low; + uint32_t high; +}; + +/* + * ATAG_REVISION - board revision + */ +struct arm_lbabi_revision +{ + uint32_t rev; +}; + +/* + * ATAG_CMDLINE - Command line from uboot + */ +struct arm_lbabi_command_line +{ + char command[1]; /* Minimum command length */ +}; + +struct arm_lbabi_tag +{ + struct arm_lbabi_header tag_hdr; + union { + struct arm_lbabi_core tag_core; + struct arm_lbabi_mem32 tag_mem; + struct arm_lbabi_initrd tag_initrd; + struct arm_lbabi_serial_number tag_sn; + struct arm_lbabi_revision tag_rev; + struct arm_lbabi_command_line tag_cmd; + } u; +}; + +#define ATAG_TAG(a) (a)->tag_hdr.tag +#define ATAG_SIZE(a) (a)->tag_hdr.size +#define ATAG_NEXT(a) (struct arm_lbabi_tag *)((char *)(a) + ATAG_SIZE(a)) + +#endif /* __MACHINE_ATAGS_H__ */
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