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/*-
* Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
* 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
#define __ELF_WORD_SIZE 64
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/linker.h>
#include <machine/metadata.h>
#include <machine/elf.h>
#include <stand.h>
#include "bootstrap.h"
#include "syscall_nr.h"
#include "host_syscall.h"
#include "modinfo.h"
#include "kboot.h"
extern char end[];
extern void *kerneltramp;
extern size_t szkerneltramp;
struct trampoline_data {
uint32_t kernel_entry;
uint32_t dtb;
uint32_t phys_mem_offset;
uint32_t of_entry;
uint32_t mdp;
uint32_t mdp_size;
};
int
ppc64_elf_loadfile(char *filename, uint64_t dest,
struct preloaded_file **result)
{
int r;
r = __elfN(loadfile)(filename, dest, result);
if (r != 0)
return (r);
return (0);
}
int
ppc64_elf_exec(struct preloaded_file *fp)
{
struct file_metadata *fmp;
vm_offset_t mdp, dtb;
Elf_Ehdr *e;
int error;
uint32_t *trampoline;
uint64_t entry;
uint64_t trampolinebase;
struct trampoline_data *trampoline_data;
int nseg;
void *kseg;
if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
return(EFTYPE);
}
e = (Elf_Ehdr *)&fmp->md_data;
/*
* Figure out where to put it.
*
* Linux does not allow to do kexec_load into
* any part of memory. Ask arch_loadaddr to
* resolve the first available chunk of physical
* memory where loading is possible (load_addr).
*
* Memory organization is shown below.
* It is assumed, that text segment offset of
* kernel ELF (KERNPHYSADDR) is non-zero,
* which is true for PPC/PPC64 architectures,
* where default is 0x100000.
*
* load_addr: trampoline code
* load_addr + KERNPHYSADDR: kernel text segment
*/
trampolinebase = archsw.arch_loadaddr(LOAD_RAW, NULL, 0);
printf("Load address at %#jx\n", (uintmax_t)trampolinebase);
printf("Relocation offset is %#jx\n", (uintmax_t)elf64_relocation_offset);
/* Set up loader trampoline */
trampoline = malloc(szkerneltramp);
memcpy(trampoline, &kerneltramp, szkerneltramp);
/* Parse function descriptor for ELFv1 kernels */
if ((e->e_flags & 3) == 2)
entry = e->e_entry;
else {
archsw.arch_copyout(e->e_entry + elf64_relocation_offset,
&entry, 8);
entry = be64toh(entry);
}
/*
* Placeholder for trampoline data is at trampolinebase + 0x08
* CAUTION: all data must be Big Endian
*/
trampoline_data = (void*)&trampoline[2];
trampoline_data->kernel_entry = htobe32(entry + elf64_relocation_offset);
trampoline_data->phys_mem_offset = htobe32(0);
trampoline_data->of_entry = htobe32(0);
if ((error = md_load64(fp->f_args, &mdp, &dtb)) != 0)
return (error);
trampoline_data->dtb = htobe32(dtb);
trampoline_data->mdp = htobe32(mdp);
trampoline_data->mdp_size = htobe32(0xfb5d104d);
printf("Kernel entry at %#jx (%#x) ...\n",
entry, be32toh(trampoline_data->kernel_entry));
printf("DTB at %#x, mdp at %#x\n",
be32toh(trampoline_data->dtb), be32toh(trampoline_data->mdp));
dev_cleanup();
archsw.arch_copyin(trampoline, trampolinebase, szkerneltramp);
free(trampoline);
kboot_kseg_get(&nseg, &kseg);
error = host_kexec_load(trampolinebase, nseg, kseg, HOST_KEXEC_ARCH_PPC64);
if (error != 0)
panic("kexec_load returned error: %d", error);
error = host_reboot(HOST_REBOOT_MAGIC1, HOST_REBOOT_MAGIC2, HOST_REBOOT_CMD_KEXEC,
(uintptr_t)NULL);
if (error != 0)
panic("reboot returned error: %d", error);
while (1) {}
}
struct file_format ppc_elf64 =
{
ppc64_elf_loadfile,
ppc64_elf_exec
};
/*
* Sort formats so that those that can detect based on arguments rather than
* reading the file first.
*/
struct file_format *file_formats[] = {
&ppc_elf64,
NULL
};
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