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