gzboot -- boot a gzip'd kernel image. This is useful for booting
compressed kernel images from flash. This needs more work, but is a good first-pass.
This commit is contained in:
thorpej
parent
1152fa21da
commit
0fac1c42e9
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@ -0,0 +1,93 @@
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# $NetBSD: Makefile.gzboot,v 1.1 2002/02/23 05:41:14 thorpej Exp $
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NOMAN= # defined
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.include <bsd.own.mk>
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EVBARM_STAND= ${S}/arch/evbarm/stand
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BASE= gzboot_${PLATFORM}_${RELOC}
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PROG= ${BASE}.sym
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WARNS= 1
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NEWVERSWHAT= "Gzip Boot"
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VERSIONFILE= ${EVBARM_STAND}/gzboot/version
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BINMODE=644
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DBG= -Os
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# XXX SHOULD NOT NEED TO DEFINE THESE!
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LIBCRT0=
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LIBC=
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LIBCRTBEGIN=
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LIBCRTEND=
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.PATH: ${EVBARM_STAND}/gzboot
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.PATH: ${EVBARM_STAND}/board
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SRCS+= gzboot.c image.c
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STARTFILE= srtbegin.o
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CPPFLAGS+= -nostdinc -I. -I${EVBARM_STAND}/gzboot -I${EVBARM_STAND}/board
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CPPFLAGS+= -I${S} -I${S}/arch -I${S}/lib/libsa
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CPPFLAGS+= -D_STANDALONE
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CPPFLAGS+= -DHEAP_VARIABLE
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CPPFLAGS+= -DRELOC=0x${RELOC}
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COPTS+= -ffreestanding
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CWARNFLAGS+= -Wno-main
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CLEANFILES+= ${STARTFILE} vers.c ${BASE}.list
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SRCS+= vers.c
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.if !make(obj) && !make(clean) && !make(cleandir)
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.BEGIN: machine
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.NOPATH: machine
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.endif
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realdepend realall: machine
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CLEANFILES+= arm machine
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machine::
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-rm -f arm machine
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ln -s ${S}/arch/evbarm/include machine
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ln -s ${S}/arch/arm/include arm
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${OBJS}: machine
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### find out what to use for libkern
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KERN_AS= library
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.include "${S}/lib/libkern/Makefile.inc"
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LIBKERN= ${KERNLIB}
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### find out what to use for libz
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Z_AS= library
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.include "${S}/lib/libz/Makefile.inc"
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LIBZ= ${ZLIB}
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### find out what to use for libsa
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SA_AS= library
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.include "${S}/lib/libsa/Makefile.inc"
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LIBSA= ${SALIB}
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cleandir distclean: cleanlibdir
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cleanlibdir:
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rm -rf lib
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LDFLAGS= -M -N -e start
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LIBLIST=${LIBSA} ${LIBZ} ${LIBSA} ${LIBKERN} ${LIBSA}
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.PHONY: vers.c
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vers.c: ${VERSIONFILE}
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sh ${S}/conf/newvers_stand.sh ${.ALLSRC} '${PLATFORM}' \
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${NEWVERSWHAT}
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${PROG}: ${STARTFILE} ${OBJS} ${LIBSA} ${LIBZ} ${LIBKERN}
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${LD} -o ${BASE}.sym ${LDFLAGS} -Ttext 0x${RELOC} ${STARTFILE} \
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${OBJS} ${LIBLIST} > ${BASE}.list
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.include <bsd.prog.mk>
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@ -0,0 +1,405 @@
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/* $NetBSD: gzboot.c,v 1.1 2002/02/23 05:41:14 thorpej Exp $ */
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/*
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* Copyright (c) 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* 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 WASABI SYSTEMS, INC
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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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/*
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* The Gzip header parser and libz interface glue are derived from
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* sys/lib/libsa/cread.c, which carries the following notice:
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*
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* Copyright (c) 1996
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* Matthias Drochner. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by Matthias Drochner.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <lib/libz/zlib.h>
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#include "board.h"
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#include "gzboot.h"
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/* zlib glue defns */
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#define EOF (-1) /* needed by compression code */
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#define Z_BUFSIZE 1024
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static const int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */
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/* gzip flag byte */
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#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
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#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
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#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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#define COMMENT 0x10 /* bit 4 set: file comment present */
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#define RESERVED 0xe0 /* bits 5..7: reserved */
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struct state {
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z_stream stream;
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int z_err; /* error code for last stream operation */
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int z_eof; /* set of end of input file */
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const unsigned char *srcbuf;/* source buffer */
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size_t srcoff; /* source buffer offset */
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size_t srcsize;/* size of source buffer */
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unsigned char *inbuf; /* input buffer */
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uint32_t crc; /* crc32 of uncompressed data */
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int spinny; /* twiddle every N reads */
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};
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static uint32_t get_u8(struct state *);
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static uint32_t get_u32(struct state *);
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static int check_header(struct state *);
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/* XXX - find a suitable header for these: */
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void *zcalloc(void *, unsigned int, unsigned int);
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void zcfree(void *, void *);
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void zmemcpy(unsigned char *, unsigned char *, unsigned int);
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/* end zlib glue defns */
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void main(void);
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void gzcopy(void *, const void *, size_t);
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void
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main(void)
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{
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extern char bootprog_name[], bootprog_rev[],
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bootprog_maker[], bootprog_date[];
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void (*loadaddr)(void) = (void *) md_root_loadaddr;
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cons_init();
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printf("\n");
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printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
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printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
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mem_init();
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printf(">> Load address: 0x%x\n", md_root_loadaddr);
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printf(">> Image size: %u\n", md_root_size);
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printf("Uncompressing image...");
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gzcopy((void *) loadaddr, md_root_image, md_root_size);
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printf("done.\n");
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printf("Jumping to image @ 0x%x...\n", md_root_loadaddr);
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(*loadaddr)();
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_rtt();
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}
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void abort(void);
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void
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abort(void)
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{
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for (;;) ;
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}
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__dead void
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_rtt(void)
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{
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for (;;) ;
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}
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/* internal utility routines */
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static ssize_t
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readbuf(struct state *s, void *buf, size_t len)
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{
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if (len > (s->srcsize - s->srcoff))
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len = s->srcsize - s->srcoff;
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if ((s->spinny & 255) == 0)
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twiddle();
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memcpy(buf, s->srcbuf + s->srcoff, len);
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s->srcoff += len;
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return (len);
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}
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static ssize_t
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readgz(struct state *s, void *buf, size_t len)
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{
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unsigned char *start = buf; /* start for CRC computation */
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if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO)
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return (-1);
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if (s->z_err == Z_STREAM_END)
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return (0); /* EOF */
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s->stream.next_out = buf;
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s->stream.avail_out = len;
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while (s->stream.avail_out != 0) {
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if (s->stream.avail_in == 0 && s->z_eof == 0) {
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ssize_t got;
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got = readbuf(s, s->inbuf, Z_BUFSIZE);
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if (got <= 0)
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s->z_eof = 1;
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s->stream.avail_in = got;
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s->stream.next_in = s->inbuf;
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}
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s->z_err = inflate(&s->stream, Z_NO_FLUSH);
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if (s->z_err == Z_STREAM_END) {
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/* Check CRC and original size */
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s->crc = crc32(s->crc, start, (unsigned int)
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(s->stream.next_out - start));
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start = s->stream.next_out;
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if (get_u32(s) != s->crc) {
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printf("FATAL: CRC checksum mismatch\n");
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s->z_err = Z_DATA_ERROR;
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}
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if (get_u32(s) != s->stream.total_out) {
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printf("FATAL: total output mismatch\n");
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s->z_err = Z_DATA_ERROR;
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}
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s->z_eof = 1;
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}
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if (s->z_err != Z_OK || s->z_eof)
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break;
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}
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s->crc = crc32(s->crc, start,
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(unsigned int)(s->stream.next_out - start));
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return ((ssize_t) (len - s->stream.avail_out));
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}
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/* util routines for zlib */
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void *
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zcalloc(void *arg, unsigned int items, unsigned int size)
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{
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void *ptr;
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size_t sz;
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sz = size * items;
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ptr = alloc(sz);
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if (ptr != NULL)
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memset(ptr, 0, sz);
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return (ptr);
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}
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void
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zcfree(void *arg, void *ptr)
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{
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free(ptr, 0); /* XXX works only with modified allocator */
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}
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void
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zmemcpy(unsigned char *dst, unsigned char *src, unsigned int len)
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{
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memcpy(dst, src, len);
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}
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/* gzip utility routines */
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static uint32_t
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get_u8(struct state *s)
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{
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if (s->z_eof)
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return (EOF);
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if (s->stream.avail_in == 0) {
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ssize_t got;
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got = readbuf(s, s->inbuf, Z_BUFSIZE);
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if (got <= 0) {
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s->z_eof = 1;
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return (EOF);
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}
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s->stream.avail_in = got;
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s->stream.next_in = s->inbuf;
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}
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s->stream.avail_in--;
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return (*(s->stream.next_in)++);
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}
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static uint32_t
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get_u32(struct state *s)
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{
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uint32_t x, c;
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x = get_u8(s);
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x |= get_u8(s) << 8;
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x |= get_u8(s) << 16;
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c = get_u8(s);
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if (c == EOF)
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s->z_err = Z_DATA_ERROR;
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x |= c << 24;
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return (x);
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}
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static int
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check_header(struct state *s)
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{
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int method; /* method byte */
|
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int flags; /* flags byte */
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unsigned int len;
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int c;
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/* Check the gzip magic header */
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for (len = 0; len < 2; len++) {
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c = get_u8(s);
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if (c == gz_magic[len])
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continue;
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printf("FATAL: not a Gzip'd image\n");
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return (1);
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}
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method = get_u8(s);
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flags = get_u8(s);
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if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
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printf("FATAL: invalid Gzip header\n");
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return (1);
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||||
}
|
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||||
/* Discard time, xflags, and OS code: */
|
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for (len = 0; len < 6; len++)
|
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(void) get_u8(s);
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||||
|
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if (flags & EXTRA_FIELD) {
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/* skip the extra field */
|
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len = get_u8(s);
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len |= get_u8(s) << 8;
|
||||
/* len is garbage if EOF, but the loop below will quit anyway */
|
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while (len-- && get_u8(s) != EOF)
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||||
/* loop */;
|
||||
}
|
||||
if (flags & ORIG_NAME) {
|
||||
/* skip the original file name */
|
||||
while ((c = get_u8(s)) != 0 && c != EOF)
|
||||
/* loop */;
|
||||
}
|
||||
if (flags & COMMENT) {
|
||||
/* skip the file comment */
|
||||
while ((c = get_u8(s)) != 0 && c != EOF)
|
||||
/* loop */;
|
||||
}
|
||||
if (flags & HEAD_CRC) {
|
||||
/* skip header CRC */
|
||||
for (len = 0; len < 2; len++)
|
||||
(void) get_u8(s);
|
||||
}
|
||||
|
||||
if (s->z_eof) {
|
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printf("FATAL: end of image encountered parsing Gzip header\n");
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return (1);
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}
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||||
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||||
/* OK! */
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* the actual gzcopy routine */
|
||||
|
||||
void
|
||||
gzcopy(void *dst, const void *src, size_t srclen)
|
||||
{
|
||||
struct state state;
|
||||
unsigned char *cp = dst;
|
||||
ssize_t len;
|
||||
|
||||
memset(&state, 0, sizeof(state));
|
||||
|
||||
state.z_err = Z_OK;
|
||||
state.srcbuf = src;
|
||||
state.srcsize = srclen;
|
||||
|
||||
if (inflateInit2(&state.stream, -15) != Z_OK) {
|
||||
printf("FATAL: inflateInit2 failed\n");
|
||||
_rtt();
|
||||
}
|
||||
|
||||
state.stream.next_in = state.inbuf = alloc(Z_BUFSIZE);
|
||||
if (state.inbuf == NULL) {
|
||||
inflateEnd(&state.stream);
|
||||
printf("FATAL: unable to allocate Z buffer\n");
|
||||
_rtt();
|
||||
}
|
||||
|
||||
/* Skip the Gzip header. */
|
||||
if (check_header(&state)) {
|
||||
inflateEnd(&state.stream);
|
||||
free(state.inbuf, Z_BUFSIZE);
|
||||
_rtt();
|
||||
}
|
||||
|
||||
/* Uncompress the image! */
|
||||
while ((len = readgz(&state, cp, Z_BUFSIZE)) > 0)
|
||||
cp += len;
|
||||
if (len == -1)
|
||||
_rtt();
|
||||
|
||||
/* All done! */
|
||||
inflateEnd(&state.stream);
|
||||
free(state.inbuf, Z_BUFSIZE);
|
||||
}
|
||||
|
|
@ -0,0 +1,45 @@
|
|||
/* $NetBSD: gzboot.h,v 1.1 2002/02/23 05:41:14 thorpej Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2002 Wasabi Systems, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed for the NetBSD Project by
|
||||
* Wasabi Systems, Inc.
|
||||
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
||||
* 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 _GZBOOT_H_
|
||||
#define _GZBOOT_H_
|
||||
|
||||
extern const uint32_t md_root_loadaddr;
|
||||
extern const uint32_t md_root_size;
|
||||
extern const char md_root_image[];
|
||||
|
||||
#endif /* _GZBOOT_H_ */
|
||||
|
|
@ -0,0 +1,42 @@
|
|||
/* $NetBSD: image.c,v 1.1 2002/02/23 05:41:14 thorpej Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2002 Wasabi Systems, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed for the NetBSD Project by
|
||||
* Wasabi Systems, Inc.
|
||||
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
const uint32_t md_root_loadaddr = LOADADDR;
|
||||
const uint32_t md_root_size = MAXIMAGESIZE;
|
||||
const char md_root_image[MAXIMAGESIZE] = "|This is the gzboot image!\n";
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
/* $NetBSD: srtbegin.S,v 1.1 2002/02/23 05:41:14 thorpej Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2002 Wasabi Systems, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed for the NetBSD Project by
|
||||
* Wasabi Systems, Inc.
|
||||
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <machine/asm.h>
|
||||
#include <arm/armreg.h>
|
||||
|
||||
ENTRY(start)
|
||||
/*
|
||||
* We assume we've been loaded VA==PA, or that the MMU
|
||||
* is disabled. Make sure the MMU is disabled so that
|
||||
* we don't have to care about the caches.
|
||||
*/
|
||||
mrc p15, 0, r2, c1, c0, 0
|
||||
bic r2, r2, #CPU_CONTROL_MMU_ENABLE
|
||||
mcr p15, 0, r2, c1, c0, 0
|
||||
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
|
||||
/* Clear the BSS. */
|
||||
add r1, pc, #(Lbss - . - 8)
|
||||
ldmia r1, {r1, r2}
|
||||
sub r2, r2, r1
|
||||
mov r3, #0
|
||||
|
||||
1: strb r3, [r1], #0x01
|
||||
subs r2, r2, #0x01
|
||||
bgt 1b
|
||||
|
||||
/* Set the stack pointer */
|
||||
add sp, pc, #(Lstack - . - 8) /* XXX for now */
|
||||
|
||||
b _C_LABEL(main)
|
||||
|
||||
Lbss:
|
||||
.word _C_LABEL(_edata)
|
||||
.word _C_LABEL(_end)
|
||||
|
||||
Lstack:
|
||||
.space 1024 /* XXX for now */
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
$NetBSD: version,v 1.1 2002/02/23 05:41:14 thorpej Exp $
|
||||
|
||||
NOTE ANY CHANGES YOU MAKE TO THE BOOTBLOCKS HERE. The format of this
|
||||
file is important - make sure the entries are appended on end, last item
|
||||
is taken as the current.
|
||||
|
||||
1.0: Gzip Boot, for booting compressed kernel images from flash.
|
||||
Loading…
Reference in New Issue