The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/bootinfo.h

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    1 /*-
    2  * Copyright (c) 2013 Robert N. M. Watson
    3  * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon  97222
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer as
   11  *    the first lines of this file unmodified.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Rodney W. Grimes.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  * $FreeBSD: releng/11.2/sys/mips/include/bootinfo.h 331722 2018-03-29 02:50:57Z eadler $
   34  */
   35 
   36 #ifndef _MACHINE_BOOTINFO_H_
   37 #define _MACHINE_BOOTINFO_H_
   38 
   39 /* Only change the version number if you break compatibility. */
   40 #define BOOTINFO_VERSION        2
   41 
   42 #define MIPS_BOOTINFO_MAGIC     0xCDEACDEA
   43 
   44 #if defined(__mips_n32) || defined(__mips_n64)
   45 typedef uint64_t        bi_ptr_t;
   46 #else
   47 typedef uint32_t        bi_ptr_t;
   48 #endif
   49 
   50 /*
   51  * A zero bootinfo field often means that there is no info available.
   52  * Flags are used to indicate the validity of fields where zero is a
   53  * normal value.
   54  */
   55 struct bootinfo {
   56         /* bootinfo meta-data. */
   57         uint32_t        bi_version;
   58         uint32_t        bi_size;
   59 
   60         /* bootinfo contents. */
   61         uint64_t        bi_boot2opts;   /* boot2 flags to loader. */
   62         bi_ptr_t        bi_kernelname;  /* Pointer to name. */
   63         bi_ptr_t        bi_nfs_diskless;/* Pointer to NFS data. */
   64         bi_ptr_t        bi_dtb;         /* Pointer to dtb. */
   65         bi_ptr_t        bi_memsize;     /* Physical memory size in bytes. */
   66         bi_ptr_t        bi_modulep;     /* Preloaded modules. */
   67         bi_ptr_t        bi_boot_dev_type;       /* Boot-device type. */
   68         bi_ptr_t        bi_boot_dev_unitptr;    /* Boot-device unit/pointer. */
   69 };
   70 
   71 /*
   72  * Possible boot-device types passed from boot2 to loader, loader to kernel.
   73  * In most cases, the object pointed to will hold a filesystem; one exception
   74  * is BOOTINFO_DEV_TYPE_DRAM, which points to a pre-loaded object (e.g.,
   75  * loader, kernel).
   76  */
   77 #define BOOTINFO_DEV_TYPE_DRAM          0       /* DRAM loader/kernel (ptr). */
   78 #define BOOTINFO_DEV_TYPE_CFI           1       /* CFI flash (unit). */
   79 #define BOOTINFO_DEV_TYPE_SDCARD        2       /* SD card (unit). */
   80 
   81 #ifdef _KERNEL
   82 extern struct bootinfo  bootinfo;
   83 #endif
   84 
   85 #endif  /* !_MACHINE_BOOTINFO_H_ */

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