4527ee3e06
particular interest in (and support for) SRI International and the
University of Cambridge's BERI FPGA soft-core processor. This includes
micro device drivers for the Altera JTAG UART console, memory-mapped
flash, and the Altera SD Card IP core in both boot2 and loader. boot2
can be written to the on-board Intel StrataFlash on the DE4 board, and
loader can be placed in StrataFlash or the SD Card.
Plenty of XXX comments, but works quite well locally in practice and I
am using it daily. Although I had originally ported the ARM version
of boot2, the current version is x86-derived as that proved more
feature-complete. As we don't currently use partitions on our flash
disks, support for that has been commented out relative to x86, but
would be easy to add back. FDT support has not yet been hooked up,
although some skeleton parts have been put in place for that.
This may well be a useful starting point for ports to other 32-bit and
64-bit MIPS-ISA systems.
This merge is synchronised to CheriBSD github commit
e41d74fd71, but with some additions of
$FreeBSD.
MFC after: 3 weeks
Sponsored by: DARPA, AFRAL
126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/*-
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* Copyright (c) 2013-2014 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <machine/bootinfo.h>
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#include <machine/elf.h>
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#include <bootstrap.h>
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#include <loader.h>
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#include <mips.h>
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#include <stand.h>
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static int beri_elf64_loadfile(char *, uint64_t,
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struct preloaded_file **);
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static int beri_elf64_exec(struct preloaded_file *fp);
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struct file_format beri_elf = {
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.l_load = beri_elf64_loadfile,
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.l_exec = beri_elf64_exec,
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};
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/*
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* bootinfo that we will pass onto the kernel; some fields derived from
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* *boot2_bootinfop, others filled in by loader.
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*/
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struct bootinfo bootinfo;
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static int
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beri_elf64_loadfile(char *filename, uint64_t dest,
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struct preloaded_file **result)
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{
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/*
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* Some platforms require invalidation of instruction caches here; we
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* don't need that currently.
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*/
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return (__elfN(loadfile)(filename, dest, result));
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}
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static int
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beri_elf64_exec(struct preloaded_file *fp)
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{
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void (*entry)(register_t, register_t, register_t, register_t);
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struct file_metadata *md;
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vm_offset_t mdp;
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Elf_Ehdr *ehdr;
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int error;
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md = file_findmetadata(fp, MODINFOMD_ELFHDR);
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if (md == NULL) {
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printf("%s: file_findmetadata failed\n");
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return (EFTYPE);
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}
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ehdr = (Elf_Ehdr *)md->md_data;
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error = md_load64(fp->f_args, &mdp);
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if (error) {
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printf("%s: md_load64 failed\n");
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return (error);
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}
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entry = (void *)ehdr->e_entry;
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printf("Kernel entry at %p\n", entry);
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dev_cleanup(); /* XXXRW: Required? */
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printf("Kernel args: %s\n", fp->f_args);
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/*
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* Configure bootinfo for the loaded kernel. Some values are
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* inherited from the bootinfo passed to us by boot2 (e.g., DTB
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* pointer); others are local to the loader (e.g., kernel boot flags).
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*/
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bzero(&bootinfo, sizeof(bootinfo));
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bootinfo.bi_version = BOOTINFO_VERSION;
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bootinfo.bi_size = sizeof(bootinfo);
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bootinfo.bi_boot2opts = boot2_bootinfo.bi_boot2opts;
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/* NB: bi_kernelname used only by boot2. */
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/* NB: bi_nfs_diskless not yet. */
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bootinfo.bi_dtb = boot2_bootinfo.bi_dtb;
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bootinfo.bi_memsize = boot2_bootinfo.bi_memsize;
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bootinfo.bi_modulep = mdp;
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/*
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* XXXRW: For now, pass 'memsize' rather than dtb or bootinfo. This
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* is the 'old' ABI spoken by Miniboot and the kernel. To pass in
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* boot2opts, modules, etc, we will need to fix this to pass in at
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* least bootinfop.
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*/
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(*entry)(boot2_argc, (register_t)boot2_argv, (register_t)boot2_envv,
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&bootinfo);
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panic("exec returned");
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}
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