/*-
* Copyright (c) 1998 Michael Smith <msmith@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.
*
* from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <sys/param.h>
#include <sys/linker.h>
#include <sys/boot.h>
#include <sys/reboot.h>
#if defined(LOADER_FDT_SUPPORT)
#include <fdt_platform.h>
#endif
#ifdef __arm__
#include <machine/elf.h>
#endif
#include <machine/metadata.h>
#include "bootstrap.h"
#include "modinfo.h"
#ifdef LOADER_GELI_SUPPORT
#include "geliboot.h"
#endif
static int
md_getboothowto(char *kargs)
{
int howto;
/* Parse kargs */
howto = boot_parse_cmdline(kargs);
howto |= boot_env_to_howto();
if (!strcmp(getenv("console"), "comconsole"))
howto |= RB_SERIAL;
if (!strcmp(getenv("console"), "nullconsole"))
howto |= RB_MUTE;
return(howto);
}
/*
* Load the information expected by a kernel.
*
* - The 'boothowto' argument is constructed
* - The 'bootdev' argument is constructed
* - The kernel environment is copied into kernel space.
* - Module metadata are formatted and placed in kernel space.
*/
static int
md_load_dual(char *args, vm_offset_t *modulep, vm_offset_t *dtb, int kern64)
{
struct preloaded_file *kfp;
struct preloaded_file *xp;
struct file_metadata *md;
vm_offset_t kernend;
vm_offset_t addr;
vm_offset_t envp;
#if defined(LOADER_FDT_SUPPORT)
vm_offset_t fdtp;
#endif
vm_offset_t size;
uint64_t scratch64;
char *rootdevname;
int howto;
#ifdef __arm__
vm_offset_t vaddr;
int i;
/*
* These metadata addreses must be converted for kernel after
* relocation.
*/
uint32_t mdt[] = {
MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
MODINFOMD_ENVP,
#if defined(LOADER_FDT_SUPPORT)
MODINFOMD_DTBP
#endif
};
#endif
howto = md_getboothowto(args);
/*
* Allow the environment variable 'rootdev' to override the supplied
* device. This should perhaps go to MI code and/or have $rootdev
* tested/set by MI code before launching the kernel.
*/
rootdevname = getenv("rootdev");
if (rootdevname == NULL)
rootdevname = getenv("currdev");
/* Try reading the /etc/fstab file to select the root device */
getrootmount(rootdevname);
/* Find the last module in the chain */
addr = 0;
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
if (addr < (xp->f_addr + xp->f_size))
addr = xp->f_addr + xp->f_size;
}
/* Pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
/* Copy our environment */
envp = addr;
addr = md_copyenv(addr);
/* Pad to a page boundary */
addr = roundup(addr, PAGE_SIZE);
#if defined(LOADER_FDT_SUPPORT)
/* Copy out FDT */
fdtp = 0;
#if defined(__powerpc__)
if (getenv("usefdt") != NULL)
#endif
{
size = fdt_copy(addr);
fdtp = addr;
addr = roundup(addr + size, PAGE_SIZE);
}
#endif
kernend = 0;
kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
if (kfp == NULL)
kfp = file_findfile(NULL, "elf kernel");
if (kfp == NULL)
panic("can't find kernel file");
file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
if (kern64) {
scratch64 = envp;
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
#if defined(LOADER_FDT_SUPPORT)
if (fdtp != 0) {
scratch64 = fdtp;
file_addmetadata(kfp, MODINFOMD_DTBP, sizeof scratch64, &scratch64);
}
#endif
scratch64 = kernend;
file_addmetadata(kfp, MODINFOMD_KERNEND,
sizeof scratch64, &scratch64);
} else {
file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
#if defined(LOADER_FDT_SUPPORT)
if (fdtp != 0)
file_addmetadata(kfp, MODINFOMD_DTBP, sizeof fdtp, &fdtp);
#endif
file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
}
#ifdef LOADER_GELI_SUPPORT
geli_export_key_metadata(kfp);
#endif
*modulep = addr;
size = md_copymodules(0, kern64);
kernend = roundup(addr + size, PAGE_SIZE);
md = file_findmetadata(kfp, MODINFOMD_KERNEND);
if (kern64) {
scratch64 = kernend;
bcopy(&scratch64, md->md_data, sizeof scratch64);
} else {
bcopy(&kernend, md->md_data, sizeof kernend);
}
#ifdef __arm__
/* Convert addresses to the final VA */
*modulep -= __elfN(relocation_offset);
/* Do relocation fixup on metadata of each module. */
for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
for (i = 0; i < nitems(mdt); i++) {
md = file_findmetadata(xp, mdt[i]);
if (md) {
bcopy(md->md_data, &vaddr, sizeof vaddr);
vaddr -= __elfN(relocation_offset);
bcopy(&vaddr, md->md_data, sizeof vaddr);
}
}
}
#endif
(void)md_copymodules(addr, kern64);
#if defined(LOADER_FDT_SUPPORT)
if (dtb != NULL)
*dtb = fdtp;
#endif
return(0);
}
int
md_load(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
{
return (md_load_dual(args, modulep, dtb, 0));
}
#if defined(__powerpc__)
int
md_load64(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
{
return (md_load_dual(args, modulep, dtb, 1));
}
#endif