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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