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sparc.c revision 1.11
      1  1.11  martin /*	$NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $ */
      2   1.1      pk 
      3   1.1      pk /*-
      4   1.1      pk  * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
      5   1.1      pk  * All rights reserved.
      6   1.1      pk  *
      7   1.1      pk  * This code is derived from software contributed to The NetBSD Foundation
      8   1.5   lukem  * by Paul Kranenburg and Luke Mewburn.
      9   1.1      pk  *
     10   1.1      pk  * Redistribution and use in source and binary forms, with or without
     11   1.1      pk  * modification, are permitted provided that the following conditions
     12   1.1      pk  * are met:
     13   1.1      pk  * 1. Redistributions of source code must retain the above copyright
     14   1.1      pk  *    notice, this list of conditions and the following disclaimer.
     15   1.1      pk  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1      pk  *    notice, this list of conditions and the following disclaimer in the
     17   1.1      pk  *    documentation and/or other materials provided with the distribution.
     18   1.1      pk  *
     19   1.1      pk  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20   1.1      pk  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21   1.1      pk  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22   1.1      pk  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23   1.1      pk  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24   1.1      pk  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25   1.1      pk  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26   1.1      pk  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27   1.1      pk  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28   1.1      pk  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29   1.1      pk  * POSSIBILITY OF SUCH DAMAGE.
     30   1.1      pk  */
     31   1.1      pk 
     32   1.9   lukem #if HAVE_NBTOOL_CONFIG_H
     33   1.9   lukem #include "nbtool_config.h"
     34   1.9   lukem #endif
     35   1.9   lukem 
     36   1.1      pk #include <sys/cdefs.h>
     37   1.9   lukem #if !defined(__lint)
     38  1.11  martin __RCSID("$NetBSD: sparc.c,v 1.11 2008/04/28 20:24:16 martin Exp $");
     39   1.1      pk #endif	/* !__lint */
     40   1.1      pk 
     41   1.1      pk #include <sys/param.h>
     42   1.1      pk 
     43   1.1      pk #include <assert.h>
     44   1.1      pk #include <err.h>
     45   1.1      pk #include <stddef.h>
     46   1.1      pk #include <stdio.h>
     47   1.1      pk #include <stdlib.h>
     48   1.1      pk #include <string.h>
     49   1.1      pk #include <unistd.h>
     50   1.1      pk 
     51   1.1      pk #include "installboot.h"
     52   1.1      pk 
     53   1.5   lukem static struct bbinfo_params bbparams = {
     54   1.5   lukem 	SPARC_BBINFO_MAGIC,
     55   1.5   lukem 	SPARC_BOOT_BLOCK_OFFSET,
     56   1.5   lukem 	SPARC_BOOT_BLOCK_BLOCKSIZE,
     57   1.5   lukem 	SPARC_BOOT_BLOCK_MAX_SIZE,
     58   1.5   lukem 	32,			/* leave room for a.out header */
     59   1.7   lukem 	BBINFO_BIG_ENDIAN,
     60   1.5   lukem };
     61   1.6   lukem 
     62   1.7   lukem static int sparc_clearheader(ib_params *, struct bbinfo_params *, uint8_t *);
     63   1.7   lukem static int sparc_setheader(ib_params *, struct bbinfo_params *, uint8_t *);
     64   1.5   lukem 
     65  1.10     dsl static int sparc_clearboot(ib_params *);
     66  1.10     dsl static int sparc_setboot(ib_params *);
     67  1.10     dsl 
     68  1.10     dsl struct ib_mach ib_mach_sparc =
     69  1.10     dsl 	{ "sparc", sparc_setboot, sparc_clearboot, no_editboot,
     70  1.10     dsl 		IB_STAGE2START };
     71  1.10     dsl 
     72  1.10     dsl static int
     73   1.1      pk sparc_clearboot(ib_params *params)
     74   1.1      pk {
     75   1.1      pk 
     76   1.1      pk 	assert(params != NULL);
     77   1.1      pk 
     78   1.7   lukem 	return (shared_bbinfo_clearboot(params, &bbparams, sparc_clearheader));
     79   1.7   lukem }
     80   1.7   lukem 
     81  1.10     dsl static int
     82   1.7   lukem sparc_setboot(ib_params *params)
     83   1.7   lukem {
     84   1.7   lukem 	assert(params != NULL);
     85   1.7   lukem 
     86   1.7   lukem 	return (shared_bbinfo_setboot(params, &bbparams, sparc_setheader));
     87   1.7   lukem }
     88   1.7   lukem 
     89   1.7   lukem 
     90   1.7   lukem static int
     91   1.7   lukem sparc_clearheader(ib_params *params, struct bbinfo_params *bb_params,
     92   1.7   lukem 	uint8_t *bb)
     93   1.7   lukem {
     94   1.7   lukem 
     95   1.7   lukem 	assert(params != NULL);
     96   1.7   lukem 	assert(bb_params != NULL);
     97   1.7   lukem 	assert(bb != NULL);
     98   1.7   lukem 
     99   1.7   lukem 	memset(bb, 0, bb_params->headeroffset);
    100   1.7   lukem 	return (1);
    101   1.1      pk }
    102   1.1      pk 
    103   1.5   lukem static int
    104   1.7   lukem sparc_setheader(ib_params *params, struct bbinfo_params *bb_params, uint8_t *bb)
    105   1.1      pk {
    106   1.1      pk 
    107   1.1      pk 	assert(params != NULL);
    108   1.5   lukem 	assert(bb_params != NULL);
    109   1.5   lukem 	assert(bb != NULL);
    110   1.1      pk 
    111   1.1      pk 	/*
    112   1.1      pk 	 * sun4c/sun4m PROMs require an a.out(5) format header.
    113   1.1      pk 	 * Old-style sun4 PROMs do not expect a header at all.
    114   1.1      pk 	 * To deal with this, we construct a header that is also executable
    115   1.1      pk 	 * code containing a forward branch that gets us past the 32-byte
    116   1.1      pk 	 * header where the actual code begins. In assembly:
    117   1.1      pk 	 * 	.word	MAGIC		! a NOP
    118   1.1      pk 	 * 	ba,a	start		!
    119   1.1      pk 	 * 	.skip	24		! pad
    120   1.1      pk 	 * start:
    121   1.1      pk 	 */
    122   1.1      pk #define SUN_MAGIC	0x01030107
    123   1.1      pk #define SUN4_BASTART	0x30800007	/* i.e.: ba,a `start' */
    124   1.1      pk 	*((uint32_t *)bb) = htobe32(SUN_MAGIC);
    125   1.1      pk 	*((uint32_t *)bb + 1) = htobe32(SUN4_BASTART);
    126   1.1      pk 
    127   1.5   lukem 	return (1);
    128   1.1      pk }
    129