135 lines
4.7 KiB
C
135 lines
4.7 KiB
C
/* $NetBSD: bootinfo.h,v 1.7 2012/05/28 21:09:52 martin Exp $ */
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/*-
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _BOOTINFO_H_
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#define _BOOTINFO_H_
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#include <machine/param.h>
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#include <sparc/bootinfo.h>
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/*
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* The bootloader v1.9 and higher makes a call into a kernel with the following
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* arguments:
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*
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* %o0 OpenFirmware entry point, to keep Sun's updaters happy
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* %o1 Address of boot information vector (see below)
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* %o2 Length of the vector, in bytes
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* %o3 OpenFirmware entry point, to mimic Sun bootloader behavior
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* %o4 OpenFirmware entry point, to meet earlier NetBSD kernels
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* expectations
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*
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* All parameters are of void* type except for vector length which is of
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* integer type.
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*
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* The boot information vector format was dictated by earlier kernels and
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* starting from ofwboot v1.9 has four entries:
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*
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* +-------------------------------------+
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* #0 | NetBSD boot magic number ('DDB2') |
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* +-------------------------------------+
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* #1 | ksyms' table end address |
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* +-------------------------------------+
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* #2 | ksyms' table start address |
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* +-------------------------------------+
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* #3 | Pointer to a bootinfo binary object |
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* +-------------------------------------+
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*
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* Kernels written for pre-v1.8 ofwboot require first three cells to present
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* in this particular order, those that rely on v1.9 and higher won't work if
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* the last pointer is not in the table; therefore, the vector cannot be
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* shorter than 4 * sizeof(uint32_t) or 4 * sizeof(uint64_t) for 32-bit and
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* 64-bit boot loader, respectively.
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*
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* As of ofwboot v1.9, bootinfo binary object is placed right after the kernel
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* data segment end, i.e. in the permanently locked 4MB page. There is no order
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* for the data located in bootinfo binary object. The kernel however expects
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* at least following parameters to exist in there:
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*
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* - Symbol information (size, start, end; see struct btinfo_symtab)
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* - Kernel end address, calculated as true kernel end address plus size of
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* space reserved for bootinfo binary object (struct btinfo_kernend)
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* - Number of text segment pages (struct btinfo_count)
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* - Number of data segment pages (struct btinfo_count)
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* - Array of text pages VA/PA (struct btinfo_tlb)
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* - Array of data pages VA/PA (struct btinfo_tlb)
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*
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* The last four data structures fully describe kernel mappings. ofwboot v1.9
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* and higher map the kernel with 4MB permanent pages and this is the only
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* way to let kernel know how exactly it was mapped.
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*/
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/* Boot magic number */
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#define SPARC_MACHINE_OPENFIRMWARE 0x44444230
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#ifdef BOOTINFO_SIZE
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#undef BOOTINFO_SIZE
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#endif
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#define BOOTINFO_SIZE NBPG
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#define BTINFO_DTLB_SLOTS 100
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#define BTINFO_ITLB_SLOTS 101
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#define BTINFO_DTLB 102
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#define BTINFO_ITLB 103
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#define BTINFO_KERNEND 104
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#define BTINFO_BOOTDEV 105
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#define LOOKUP_BOOTINFO(btp, info) \
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do { \
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if ( ((btp) = lookup_bootinfo(info)) == NULL) { \
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panic("lookup_bootinfo: No " #info " found.\n"); \
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} \
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} while (0)
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struct tlb_entry {
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uint64_t te_pa;
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uint64_t te_va;
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};
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struct btinfo_count {
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struct btinfo_common common;
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int count;
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};
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struct btinfo_tlb {
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struct btinfo_common common;
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struct tlb_entry tlb[1];
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};
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struct btinfo_kernend {
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struct btinfo_common common;
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uint64_t addr;
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};
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struct btinfo_bootdev {
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struct btinfo_common common;
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char name[1];
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};
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#endif /* _BOOTINFO_H_ */
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