/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#ifndef _BOOTINFO_H_
#define _BOOTINFO_H_
#include <sparc/bootinfo.h>
/*
* The bootloader v1.9 and higher makes a call into a kernel with the following
* arguments:
*
* %o0 OpenFirmware entry point, to keep Sun's updaters happy
* %o1 Address of boot information vector (see below)
* %o2 Length of the vector, in bytes
* %o3 OpenFirmware entry point, to mimic Sun bootloader behavior
* %o4 OpenFirmware entry point, to meet earlier NetBSD kernels
* expectations
*
* All parameters are of void* type except for vector length which is of
* integer type.
*
* The boot information vector format was dictated by earlier kernels and
* starting from ofwboot v1.9 has four entries:
*
* +-------------------------------------+
* #0 | NetBSD boot magic number ('DDB2') |
* +-------------------------------------+
* #1 | ksyms' table end address |
* +-------------------------------------+
* #2 | ksyms' table start address |
* +-------------------------------------+
* #3 | Pointer to a bootinfo binary object |
* +-------------------------------------+
*
* Kernels written for pre-v1.8 ofwboot require first three cells to present
* in this particular order, those that rely on v1.9 and higher won't work if
* the last pointer is not in the table; therefore, the vector cannot be
* shorter than 4 * sizeof(uint32_t) or 4 * sizeof(uint64_t) for 32-bit and
* 64-bit boot loader, respectively.
*
* As of ofwboot v1.9, bootinfo binary object is placed right after the kernel
* data segment end, i.e. in the permanently locked 4MB page. There is no order
* for the data located in bootinfo binary object. The kernel however expects
* at least following parameters to exist in there:
*
* - Symbol information (size, start, end; see struct btinfo_symtab)
* - Kernel end address, calculated as true kernel end address plus size of
* space reserved for bootinfo binary object (struct btinfo_kernend)
* - Number of text segment pages (struct btinfo_count)
* - Number of data segment pages (struct btinfo_count)
* - Array of text pages VA/PA (struct btinfo_tlb)
* - Array of data pages VA/PA (struct btinfo_tlb)
*
* The last four data structures fully describe kernel mappings. ofwboot v1.9
* and higher map the kernel with 4MB permanent pages and this is the only
* way to let kernel know how exactly it was mapped.
*/
/* Boot magic number */
#define SPARC_MACHINE_OPENFIRMWARE 0x44444230
