2 * Copyright (c) 2008-2010 Rui Paulo
3 * Copyright (c) 2006 Marcel Moolenaar
6 * Copyright (c) 2016-2019 Netflix, Inc. written by M. Warner Losh
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/reboot.h>
51 #include <bootstrap.h>
56 #include "loader_efi.h"
58 struct arch_switch archsw; /* MI/MD interface boundary */
60 EFI_GUID acpi = ACPI_TABLE_GUID;
61 EFI_GUID acpi20 = ACPI_20_TABLE_GUID;
62 EFI_GUID devid = DEVICE_PATH_PROTOCOL;
63 EFI_GUID imgid = LOADED_IMAGE_PROTOCOL;
64 EFI_GUID mps = MPS_TABLE_GUID;
65 EFI_GUID netid = EFI_SIMPLE_NETWORK_PROTOCOL;
66 EFI_GUID smbios = SMBIOS_TABLE_GUID;
67 EFI_GUID smbios3 = SMBIOS3_TABLE_GUID;
68 EFI_GUID dxe = DXE_SERVICES_TABLE_GUID;
69 EFI_GUID hoblist = HOB_LIST_TABLE_GUID;
70 EFI_GUID lzmadecomp = LZMA_DECOMPRESSION_GUID;
71 EFI_GUID mpcore = ARM_MP_CORE_INFO_TABLE_GUID;
72 EFI_GUID esrt = ESRT_TABLE_GUID;
73 EFI_GUID memtype = MEMORY_TYPE_INFORMATION_TABLE_GUID;
74 EFI_GUID debugimg = DEBUG_IMAGE_INFO_TABLE_GUID;
75 EFI_GUID fdtdtb = FDT_TABLE_GUID;
76 EFI_GUID inputid = SIMPLE_TEXT_INPUT_PROTOCOL;
79 * Number of seconds to wait for a keystroke before exiting with failure
80 * in the event no currdev is found. -2 means always break, -1 means
81 * never break, 0 means poll once and then reboot, > 0 means wait for
82 * that many seconds. "fail_timeout" can be set in the environment as
85 static int fail_timeout = 5;
88 * Current boot variable
93 * Image that we booted from.
95 EFI_LOADED_IMAGE *boot_img;
101 EFI_DEVICE_PATH *path;
102 EFI_HANDLE *hin, *hin_end, *walker;
107 * Find all the handles that support the SIMPLE_TEXT_INPUT_PROTOCOL and
108 * do the typical dance to get the right sized buffer.
112 status = BS->LocateHandle(ByProtocol, &inputid, 0, &sz, 0);
113 if (status == EFI_BUFFER_TOO_SMALL) {
114 hin = (EFI_HANDLE *)malloc(sz);
115 status = BS->LocateHandle(ByProtocol, &inputid, 0, &sz,
117 if (EFI_ERROR(status))
120 if (EFI_ERROR(status))
124 * Look at each of the handles. If it supports the device path protocol,
125 * use it to get the device path for this handle. Then see if that
126 * device path matches either the USB device path for keyboards or the
127 * legacy device path for keyboards.
129 hin_end = &hin[sz / sizeof(*hin)];
130 for (walker = hin; walker < hin_end; walker++) {
131 status = OpenProtocolByHandle(*walker, &devid, (void **)&path);
132 if (EFI_ERROR(status))
135 while (!IsDevicePathEnd(path)) {
137 * Check for the ACPI keyboard node. All PNP3xx nodes
138 * are keyboards of different flavors. Note: It is
139 * unclear of there's always a keyboard node when
140 * there's a keyboard controller, or if there's only one
141 * when a keyboard is detected at boot.
143 if (DevicePathType(path) == ACPI_DEVICE_PATH &&
144 (DevicePathSubType(path) == ACPI_DP ||
145 DevicePathSubType(path) == ACPI_EXTENDED_DP)) {
146 ACPI_HID_DEVICE_PATH *acpi;
148 acpi = (ACPI_HID_DEVICE_PATH *)(void *)path;
149 if ((EISA_ID_TO_NUM(acpi->HID) & 0xff00) == 0x300 &&
150 (acpi->HID & 0xffff) == PNP_EISA_ID_CONST) {
155 * Check for USB keyboard node, if present. Unlike a
156 * PS/2 keyboard, these definitely only appear when
157 * connected to the system.
159 } else if (DevicePathType(path) == MESSAGING_DEVICE_PATH &&
160 DevicePathSubType(path) == MSG_USB_CLASS_DP) {
161 USB_CLASS_DEVICE_PATH *usb;
163 usb = (USB_CLASS_DEVICE_PATH *)(void *)path;
164 if (usb->DeviceClass == 3 && /* HID */
165 usb->DeviceSubClass == 1 && /* Boot devices */
166 usb->DeviceProtocol == 1) { /* Boot keyboards */
171 path = NextDevicePathNode(path);
180 set_currdev(const char *devname)
183 env_setenv("currdev", EV_VOLATILE, devname, efi_setcurrdev, env_nounset);
184 env_setenv("loaddev", EV_VOLATILE, devname, env_noset, env_nounset);
188 set_currdev_devdesc(struct devdesc *currdev)
192 devname = efi_fmtdev(currdev);
193 printf("Setting currdev to %s\n", devname);
194 set_currdev(devname);
198 set_currdev_devsw(struct devsw *dev, int unit)
200 struct devdesc currdev;
203 currdev.d_unit = unit;
205 set_currdev_devdesc(&currdev);
209 set_currdev_pdinfo(pdinfo_t *dp)
213 * Disks are special: they have partitions. if the parent
214 * pointer is non-null, we're a partition not a full disk
215 * and we need to adjust currdev appropriately.
217 if (dp->pd_devsw->dv_type == DEVT_DISK) {
218 struct disk_devdesc currdev;
220 currdev.dd.d_dev = dp->pd_devsw;
221 if (dp->pd_parent == NULL) {
222 currdev.dd.d_unit = dp->pd_unit;
223 currdev.d_slice = D_SLICENONE;
224 currdev.d_partition = D_PARTNONE;
226 currdev.dd.d_unit = dp->pd_parent->pd_unit;
227 currdev.d_slice = dp->pd_unit;
228 currdev.d_partition = D_PARTISGPT; /* XXX Assumes GPT */
230 set_currdev_devdesc((struct devdesc *)&currdev);
232 set_currdev_devsw(dp->pd_devsw, dp->pd_unit);
237 sanity_check_currdev(void)
241 return (stat(PATH_DEFAULTS_LOADER_CONF, &st) == 0 ||
242 #ifdef PATH_BOOTABLE_TOKEN
243 stat(PATH_BOOTABLE_TOKEN, &st) == 0 || /* non-standard layout */
245 stat(PATH_KERNEL, &st) == 0);
250 probe_zfs_currdev(uint64_t guid)
253 struct zfs_devdesc currdev;
255 currdev.dd.d_dev = &zfs_dev;
256 currdev.dd.d_unit = 0;
257 currdev.pool_guid = guid;
258 currdev.root_guid = 0;
259 set_currdev_devdesc((struct devdesc *)&currdev);
260 devname = efi_fmtdev(&currdev);
261 init_zfs_bootenv(devname);
263 return (sanity_check_currdev());
268 try_as_currdev(pdinfo_t *hd, pdinfo_t *pp)
274 * If there's a zpool on this device, try it as a ZFS
275 * filesystem, which has somewhat different setup than all
276 * other types of fs due to imperfect loader integration.
277 * This all stems from ZFS being both a device (zpool) and
278 * a filesystem, plus the boot env feature.
280 if (efizfs_get_guid_by_handle(pp->pd_handle, &guid))
281 return (probe_zfs_currdev(guid));
284 * All other filesystems just need the pdinfo
285 * initialized in the standard way.
287 set_currdev_pdinfo(pp);
288 return (sanity_check_currdev());
292 * Sometimes we get filenames that are all upper case
293 * and/or have backslashes in them. Filter all this out
294 * if it looks like we need to do so.
308 #define SIZE(dp, edp) (size_t)((intptr_t)(void *)edp - (intptr_t)(void *)dp)
310 enum { BOOT_INFO_OK = 0, BAD_CHOICE = 1, NOT_SPECIFIC = 2 };
312 match_boot_info(char *boot_info, size_t bisz)
318 EFI_DEVICE_PATH *dp, *edp, *first_dp, *last_dp;
322 FILEPATH_DEVICE_PATH *fp;
327 * FreeBSD encodes it's boot loading path into the boot loader
328 * BootXXXX variable. We look for the last one in the path
329 * and use that to load the kernel. However, if we only fine
330 * one DEVICE_PATH, then there's nothing specific and we should
333 * In an ideal world, we'd look at the image handle we were
334 * passed, match up with the loader we are and then return the
335 * next one in the path. This would be most flexible and cover
336 * many chain booting scenarios where you need to use this
337 * boot loader to get to the next boot loader. However, that
338 * doesn't work. We rarely have the path to the image booted
339 * (just the device) so we can't count on that. So, we do the
340 * enxt best thing, we look through the device path(s) passed
341 * in the BootXXXX varaible. If there's only one, we return
342 * NOT_SPECIFIC. Otherwise, we look at the last one and try to
343 * load that. If we can, we return BOOT_INFO_OK. Otherwise we
344 * return BAD_CHOICE for the caller to sort out.
346 if (bisz < sizeof(attr) + sizeof(fplen) + sizeof(CHAR16))
350 memcpy(&attr, walker, sizeof(attr));
351 walker += sizeof(attr);
352 memcpy(&fplen, walker, sizeof(fplen));
353 walker += sizeof(fplen);
354 descr = (CHAR16 *)(intptr_t)walker;
355 len = ucs2len(descr);
356 walker += (len + 1) * sizeof(CHAR16);
357 last_dp = first_dp = dp = (EFI_DEVICE_PATH *)walker;
358 edp = (EFI_DEVICE_PATH *)(walker + fplen);
359 if ((char *)edp > ep)
361 while (dp < edp && SIZE(dp, edp) > sizeof(EFI_DEVICE_PATH)) {
362 text = efi_devpath_name(dp);
364 printf(" BootInfo Path: %S\n", text);
365 efi_free_devpath_name(text);
368 dp = (EFI_DEVICE_PATH *)((char *)dp + efi_devpath_length(dp));
372 * If there's only one item in the list, then nothing was
373 * specified. Or if the last path doesn't have a media
374 * path in it. Those show up as various VenHw() nodes
375 * which are basically opaque to us. Don't count those
376 * as something specifc.
378 if (last_dp == first_dp) {
379 printf("Ignoring Boot%04x: Only one DP found\n", boot_current);
382 if (efi_devpath_to_media_path(last_dp) == NULL) {
383 printf("Ignoring Boot%04x: No Media Path\n", boot_current);
388 * OK. At this point we either have a good path or a bad one.
391 pp = efiblk_get_pdinfo_by_device_path(last_dp);
393 printf("Ignoring Boot%04x: Device Path not found\n", boot_current);
396 set_currdev_pdinfo(pp);
397 if (!sanity_check_currdev()) {
398 printf("Ignoring Boot%04x: sanity check failed\n", boot_current);
403 * OK. We've found a device that matches, next we need to check the last
404 * component of the path. If it's a file, then we set the default kernel
405 * to that. Otherwise, just use this as the default root.
407 * Reminder: we're running very early, before we've parsed the defaults
408 * file, so we may need to have a hack override.
410 dp = efi_devpath_last_node(last_dp);
411 if (DevicePathType(dp) != MEDIA_DEVICE_PATH ||
412 DevicePathSubType(dp) != MEDIA_FILEPATH_DP) {
413 printf("Using Boot%04x for root partition\n", boot_current);
414 return (BOOT_INFO_OK); /* use currdir, default kernel */
416 fp = (FILEPATH_DEVICE_PATH *)dp;
417 ucs2_to_utf8(fp->PathName, &kernel);
418 if (kernel == NULL) {
419 printf("Not using Boot%04x: can't decode kernel\n", boot_current);
422 if (*kernel == '\\' || isupper(*kernel))
424 if (stat(kernel, &st) != 0) {
426 printf("Not using Boot%04x: can't find %s\n", boot_current,
430 setenv("kernel", kernel, 1);
432 text = efi_devpath_name(last_dp);
434 printf("Using Boot%04x %S + %s\n", boot_current, text,
436 efi_free_devpath_name(text);
439 return (BOOT_INFO_OK);
443 * Look at the passed-in boot_info, if any. If we find it then we need
444 * to see if we can find ourselves in the boot chain. If we can, and
445 * there's another specified thing to boot next, assume that the file
446 * is loaded from / and use that for the root filesystem. If can't
447 * find the specified thing, we must fail the boot. If we're last on
448 * the list, then we fallback to looking for the first available /
449 * candidate (ZFS, if there's a bootable zpool, otherwise a UFS
450 * partition that has either /boot/defaults/loader.conf on it or
451 * /boot/kernel/kernel (the default kernel) that we can use.
453 * We always fail if we can't find the right thing. However, as
454 * a concession to buggy UEFI implementations, like u-boot, if
455 * we have determined that the host is violating the UEFI boot
456 * manager protocol, we'll signal the rest of the program that
457 * a drop to the OK boot loader prompt is possible.
460 find_currdev(bool do_bootmgr, bool is_last,
461 char *boot_info, size_t boot_info_sz)
464 EFI_DEVICE_PATH *devpath, *copy;
474 * First choice: if rootdev is already set, use that, even if
477 rootdev = getenv("rootdev");
478 if (rootdev != NULL) {
479 printf(" Setting currdev to configured rootdev %s\n",
481 set_currdev(rootdev);
486 * Second choice: If uefi_rootdev is set, translate that UEFI device
487 * path to the loader's internal name and use that.
490 rootdev = getenv("uefi_rootdev");
493 devpath = efi_name_to_devpath(rootdev);
496 dp = efiblk_get_pdinfo_by_device_path(devpath);
497 efi_devpath_free(devpath);
500 printf(" Setting currdev to UEFI path %s\n",
502 set_currdev_pdinfo(dp);
507 * Third choice: If we can find out image boot_info, and there's
508 * a follow-on boot image in that boot_info, use that. In this
509 * case root will be the partition specified in that image and
510 * we'll load the kernel specified by the file path. Should there
511 * not be a filepath, we use the default. This filepath overrides
515 rv = match_boot_info(boot_info, boot_info_sz);
517 case BOOT_INFO_OK: /* We found it */
519 case BAD_CHOICE: /* specified file not found -> error */
520 /* XXX do we want to have an escape hatch for last in boot order? */
522 } /* Nothing specified, try normal match */
527 * Did efi_zfs_probe() detect the boot pool? If so, use the zpool
528 * it found, if it's sane. ZFS is the only thing that looks for
529 * disks and pools to boot. This may change in the future, however,
530 * if we allow specifying which pool to boot from via UEFI variables
531 * rather than the bootenv stuff that FreeBSD uses today.
533 if (pool_guid != 0) {
534 printf("Trying ZFS pool\n");
535 if (probe_zfs_currdev(pool_guid))
538 #endif /* EFI_ZFS_BOOT */
541 * Try to find the block device by its handle based on the
542 * image we're booting. If we can't find a sane partition,
543 * search all the other partitions of the disk. We do not
544 * search other disks because it's a violation of the UEFI
545 * boot protocol to do so. We fail and let UEFI go on to
546 * the next candidate.
548 dp = efiblk_get_pdinfo_by_handle(boot_img->DeviceHandle);
550 text = efi_devpath_name(dp->pd_devpath);
552 printf("Trying ESP: %S\n", text);
553 efi_free_devpath_name(text);
555 set_currdev_pdinfo(dp);
556 if (sanity_check_currdev())
558 if (dp->pd_parent != NULL) {
559 pdinfo_t *espdp = dp;
561 STAILQ_FOREACH(pp, &dp->pd_part, pd_link) {
562 /* Already tried the ESP */
566 * Roll up the ZFS special case
567 * for those partitions that have
570 text = efi_devpath_name(pp->pd_devpath);
572 printf("Trying: %S\n", text);
573 efi_free_devpath_name(text);
575 if (try_as_currdev(dp, pp))
582 * Try the device handle from our loaded image first. If that
583 * fails, use the device path from the loaded image and see if
584 * any of the nodes in that path match one of the enumerated
585 * handles. Currently, this handle list is only for netboot.
587 if (efi_handle_lookup(boot_img->DeviceHandle, &dev, &unit, &extra) == 0) {
588 set_currdev_devsw(dev, unit);
589 if (sanity_check_currdev())
594 devpath = efi_lookup_image_devpath(IH);
595 while (devpath != NULL) {
596 h = efi_devpath_handle(devpath);
603 if (efi_handle_lookup(h, &dev, &unit, &extra) == 0) {
604 set_currdev_devsw(dev, unit);
605 if (sanity_check_currdev())
609 devpath = efi_lookup_devpath(h);
610 if (devpath != NULL) {
611 copy = efi_devpath_trim(devpath);
621 interactive_interrupt(const char *msg)
623 time_t now, then, last;
626 now = then = getsecs();
628 if (fail_timeout == -2) /* Always break to OK */
630 if (fail_timeout == -1) /* Never break to OK */
634 printf("press any key to interrupt reboot in %d seconds\r",
635 fail_timeout - (int)(now - then));
639 /* XXX no pause or timeout wait for char */
643 } while (now - then < fail_timeout);
648 parse_args(int argc, CHAR16 *argv[])
655 * Parse the args to set the console settings, etc
656 * boot1.efi passes these in, if it can read /boot.config or /boot/config
657 * or iPXE may be setup to pass these in. Or the optional argument in the
658 * boot environment was used to pass these arguments in (in which case
659 * neither /boot.config nor /boot/config are consulted).
661 * Loop through the args, and for each one that contains an '=' that is
662 * not the first character, add it to the environment. This allows
663 * loader and kernel env vars to be passed on the command line. Convert
664 * args from UCS-2 to ASCII (16 to 8 bit) as they are copied (though this
665 * method is flawed for non-ASCII characters).
668 for (i = 1; i < argc; i++) {
669 cpy16to8(argv[i], var, sizeof(var));
670 howto |= boot_parse_arg(var);
677 setenv_int(const char *key, int val)
681 snprintf(buf, sizeof(buf), "%d", val);
686 * Parse ConOut (the list of consoles active) and see if we can find a
687 * serial port and/or a video port. It would be nice to also walk the
688 * ACPI name space to map the UID for the serial port to a port. The
689 * latter is especially hard.
692 parse_uefi_con_out(void)
695 int vid_seen = 0, com_seen = 0, seen = 0;
698 EFI_DEVICE_PATH *node;
699 ACPI_HID_DEVICE_PATH *acpi;
700 UART_DEVICE_PATH *uart;
705 rv = efi_global_getenv("ConOut", buf, &sz);
706 if (rv != EFI_SUCCESS)
709 node = (EFI_DEVICE_PATH *)buf;
710 while ((char *)node < ep) {
712 if (DevicePathType(node) == ACPI_DEVICE_PATH &&
713 DevicePathSubType(node) == ACPI_DP) {
714 /* Check for Serial node */
716 if (EISA_ID_TO_NUM(acpi->HID) == 0x501) {
717 setenv_int("efi_8250_uid", acpi->UID);
720 } else if (DevicePathType(node) == MESSAGING_DEVICE_PATH &&
721 DevicePathSubType(node) == MSG_UART_DP) {
724 setenv_int("efi_com_speed", uart->BaudRate);
725 } else if (DevicePathType(node) == ACPI_DEVICE_PATH &&
726 DevicePathSubType(node) == ACPI_ADR_DP) {
727 /* Check for AcpiAdr() Node for video */
729 } else if (DevicePathType(node) == HARDWARE_DEVICE_PATH &&
730 DevicePathSubType(node) == HW_PCI_DP) {
732 * Note, vmware fusion has a funky console device
733 * PciRoot(0x0)/Pci(0xf,0x0)
734 * which we can only detect at the end since we also
736 * PciRoot(0x0)/Pci(0x1f,0x0)/Serial(0x1)
737 * so only match it if it's last.
741 node = NextDevicePathNode(node); /* Skip the end node */
743 if (pci_pending && vid_seen == 0)
747 * Truth table for RB_MULTIPLE | RB_SERIAL
749 * 0 Use only video console
750 * RB_SERIAL Use only serial console
751 * RB_MULTIPLE Use both video and serial console
752 * (but video is primary so gets rc messages)
753 * both Use both video and serial console
754 * (but serial is primary so gets rc messages)
756 * Try to honor this as best we can. If only one of serial / video
757 * found, then use that. Otherwise, use the first one we found.
758 * This also implies if we found nothing, default to video.
761 if (vid_seen && com_seen) {
763 if (com_seen < vid_seen)
772 parse_loader_efi_config(EFI_HANDLE h, const char *env_fn)
779 dp = efiblk_get_pdinfo_by_handle(h);
782 set_currdev_pdinfo(dp);
783 if (stat(env_fn, &st) != 0)
785 fd = open(env_fn, O_RDONLY);
788 env = malloc(st.st_size + 1);
791 if (read(fd, env, st.st_size) != st.st_size)
793 env[st.st_size] = '\0';
794 boot_parse_cmdline(env);
801 read_loader_env(const char *name, char *def_fn, bool once)
804 char *fn, *freeme = NULL;
808 if (efi_freebsd_getenv(name, NULL, &len) == EFI_BUFFER_TOO_SMALL) {
809 freeme = fn = malloc(len + 1);
811 if (efi_freebsd_getenv(name, fn, &len) != EFI_SUCCESS) {
815 "Can't fetch FreeBSD::%s we know is there\n", name);
818 * if tagged as 'once' delete the env variable so we
822 efi_freebsd_delenv(name);
824 * We malloced 1 more than len above, then redid the call.
825 * so now we have room at the end of the string to NUL terminate
826 * it here, even if the typical idium would have '- 1' here to
827 * not overflow. len should be the same on return both times.
833 "Can't allocate %d bytes to fetch FreeBSD::%s env var\n",
838 printf(" Reading loader env vars from %s\n", fn);
839 parse_loader_efi_config(boot_img->DeviceHandle, fn);
846 main(int argc, CHAR16 *argv[])
849 int howto, i, uhowto;
851 bool has_kbd, is_last;
853 EFI_DEVICE_PATH *imgpath;
856 size_t sz, bosz = 0, bisz = 0;
857 UINT16 boot_order[100];
858 char boot_info[4096];
862 archsw.arch_autoload = efi_autoload;
863 archsw.arch_getdev = efi_getdev;
864 archsw.arch_copyin = efi_copyin;
865 archsw.arch_copyout = efi_copyout;
866 archsw.arch_hypervisor = x86_hypervisor;
867 archsw.arch_readin = efi_readin;
868 archsw.arch_zfs_probe = efi_zfs_probe;
870 /* Get our loaded image protocol interface structure. */
871 (void) OpenProtocolByHandle(IH, &imgid, (void **)&boot_img);
874 * Chicken-and-egg problem; we want to have console output early, but
875 * some console attributes may depend on reading from eg. the boot
876 * device, which we can't do yet. We can use printf() etc. once this is
877 * done. So, we set it to the efi console, then call console init. This
878 * gets us printf early, but also primes the pump for all future console
879 * changes to take effect, regardless of where they come from.
881 setenv("console", "efi", 1);
884 /* Init the time source */
888 * Initialise the block cache. Set the upper limit.
890 bcache_init(32768, 512);
893 * Scan the BLOCK IO MEDIA handles then
894 * march through the device switch probing for things.
896 i = efipart_inithandles();
897 if (i != 0 && i != ENOENT) {
898 printf("efipart_inithandles failed with ERRNO %d, expect "
902 for (i = 0; devsw[i] != NULL; i++)
903 if (devsw[i]->dv_init != NULL)
904 (devsw[i]->dv_init)();
907 * Detect console settings two different ways: one via the command
908 * args (eg -h) or via the UEFI ConOut variable.
910 has_kbd = has_keyboard();
911 howto = parse_args(argc, argv);
912 if (!has_kbd && (howto & RB_PROBE))
913 howto |= RB_SERIAL | RB_MULTIPLE;
915 uhowto = parse_uefi_con_out();
918 * Read additional environment variables from the boot device's
919 * "LoaderEnv" file. Any boot loader environment variable may be set
920 * there, which are subtly different than loader.conf variables. Only
921 * the 'simple' ones may be set so things like foo_load="YES" won't work
922 * for two reasons. First, the parser is simplistic and doesn't grok
923 * quotes. Second, because the variables that cause an action to happen
924 * are parsed by the lua, 4th or whatever code that's not yet
925 * loaded. This is relative to the root directory when loader.efi is
926 * loaded off the UFS root drive (when chain booted), or from the ESP
927 * when directly loaded by the BIOS.
929 * We also read in NextLoaderEnv if it was specified. This allows next boot
930 * functionality to be implemented and to override anything in LoaderEnv.
932 read_loader_env("LoaderEnv", "/efi/freebsd/loader.env", false);
933 read_loader_env("NextLoaderEnv", NULL, true);
936 * We now have two notions of console. howto should be viewed as
937 * overrides. If console is already set, don't set it again.
940 #define SERIAL_ONLY RB_SERIAL
941 #define VID_SER_BOTH RB_MULTIPLE
942 #define SER_VID_BOTH (RB_SERIAL | RB_MULTIPLE)
943 #define CON_MASK (RB_SERIAL | RB_MULTIPLE)
944 if (strcmp(getenv("console"), "efi") == 0) {
945 if ((howto & CON_MASK) == 0) {
946 /* No override, uhowto is controlling and efi cons is perfect */
947 howto = howto | (uhowto & CON_MASK);
948 } else if ((howto & CON_MASK) == (uhowto & CON_MASK)) {
949 /* override matches what UEFI told us, efi console is perfect */
950 } else if ((uhowto & (CON_MASK)) != 0) {
952 * We detected a serial console on ConOut. All possible
953 * overrides include serial. We can't really override what efi
954 * gives us, so we use it knowing it's the best choice.
959 * We detected some kind of serial in the override, but ConOut
960 * has no serial, so we have to sort out which case it really is.
962 switch (howto & CON_MASK) {
964 setenv("console", "comconsole", 1);
967 setenv("console", "efi comconsole", 1);
970 setenv("console", "comconsole efi", 1);
972 /* case VIDEO_ONLY can't happen -- it's the first if above */
978 * howto is set now how we want to export the flags to the kernel, so
979 * set the env based on it.
981 boot_howto_to_env(howto);
983 if (efi_copy_init()) {
984 printf("failed to allocate staging area\n");
985 return (EFI_BUFFER_TOO_SMALL);
988 if ((s = getenv("fail_timeout")) != NULL)
989 fail_timeout = strtol(s, NULL, 10);
991 printf("%s\n", bootprog_info);
992 printf(" Command line arguments:");
993 for (i = 0; i < argc; i++)
994 printf(" %S", argv[i]);
997 printf(" EFI version: %d.%02d\n", ST->Hdr.Revision >> 16,
998 ST->Hdr.Revision & 0xffff);
999 printf(" EFI Firmware: %S (rev %d.%02d)\n", ST->FirmwareVendor,
1000 ST->FirmwareRevision >> 16, ST->FirmwareRevision & 0xffff);
1001 printf(" Console: %s (%#x)\n", getenv("console"), howto);
1003 /* Determine the devpath of our image so we can prefer it. */
1004 text = efi_devpath_name(boot_img->FilePath);
1006 printf(" Load Path: %S\n", text);
1007 efi_setenv_freebsd_wcs("LoaderPath", text);
1008 efi_free_devpath_name(text);
1011 rv = OpenProtocolByHandle(boot_img->DeviceHandle, &devid,
1013 if (rv == EFI_SUCCESS) {
1014 text = efi_devpath_name(imgpath);
1016 printf(" Load Device: %S\n", text);
1017 efi_setenv_freebsd_wcs("LoaderDev", text);
1018 efi_free_devpath_name(text);
1022 if (getenv("uefi_ignore_boot_mgr") != NULL) {
1023 printf(" Ignoring UEFI boot manager\n");
1024 uefi_boot_mgr = false;
1026 uefi_boot_mgr = true;
1028 sz = sizeof(boot_current);
1029 rv = efi_global_getenv("BootCurrent", &boot_current, &sz);
1030 if (rv == EFI_SUCCESS)
1031 printf(" BootCurrent: %04x\n", boot_current);
1033 boot_current = 0xffff;
1034 uefi_boot_mgr = false;
1037 sz = sizeof(boot_order);
1038 rv = efi_global_getenv("BootOrder", &boot_order, &sz);
1039 if (rv == EFI_SUCCESS) {
1040 printf(" BootOrder:");
1041 for (i = 0; i < sz / sizeof(boot_order[0]); i++)
1042 printf(" %04x%s", boot_order[i],
1043 boot_order[i] == boot_current ? "[*]" : "");
1045 is_last = boot_order[(sz / sizeof(boot_order[0])) - 1] == boot_current;
1047 } else if (uefi_boot_mgr) {
1049 * u-boot doesn't set BootOrder, but otherwise participates in the
1050 * boot manager protocol. So we fake it here and don't consider it
1053 bosz = sizeof(boot_order[0]);
1054 boot_order[0] = boot_current;
1060 * Next, find the boot info structure the UEFI boot manager is
1061 * supposed to setup. We need this so we can walk through it to
1062 * find where we are in the booting process and what to try to
1065 if (uefi_boot_mgr) {
1066 snprintf(buf, sizeof(buf), "Boot%04X", boot_current);
1067 sz = sizeof(boot_info);
1068 rv = efi_global_getenv(buf, &boot_info, &sz);
1069 if (rv == EFI_SUCCESS)
1072 uefi_boot_mgr = false;
1076 * Disable the watchdog timer. By default the boot manager sets
1077 * the timer to 5 minutes before invoking a boot option. If we
1078 * want to return to the boot manager, we have to disable the
1079 * watchdog timer and since we're an interactive program, we don't
1080 * want to wait until the user types "quit". The timer may have
1081 * fired by then. We don't care if this fails. It does not prevent
1082 * normal functioning in any way...
1084 BS->SetWatchdogTimer(0, 0, 0, NULL);
1087 * Initialize the trusted/forbidden certificates from UEFI.
1088 * They will be later used to verify the manifest(s),
1089 * which should contain hashes of verified files.
1090 * This needs to be initialized before any configuration files
1093 #ifdef EFI_SECUREBOOT
1098 * Try and find a good currdev based on the image that was booted.
1099 * It might be desirable here to have a short pause to allow falling
1100 * through to the boot loader instead of returning instantly to follow
1101 * the boot protocol and also allow an escape hatch for users wishing
1102 * to try something different.
1104 if (find_currdev(uefi_boot_mgr, is_last, boot_info, bisz) != 0)
1105 if (uefi_boot_mgr &&
1106 !interactive_interrupt("Failed to find bootable partition"))
1107 return (EFI_NOT_FOUND);
1109 efi_init_environment();
1111 #if !defined(__arm__)
1112 for (k = 0; k < ST->NumberOfTableEntries; k++) {
1113 guid = &ST->ConfigurationTable[k].VendorGuid;
1114 if (!memcmp(guid, &smbios, sizeof(EFI_GUID))) {
1117 snprintf(buf, sizeof(buf), "%p",
1118 ST->ConfigurationTable[k].VendorTable);
1119 setenv("hint.smbios.0.mem", buf, 1);
1120 smbios_detect(ST->ConfigurationTable[k].VendorTable);
1126 interact(); /* doesn't return */
1128 return (EFI_SUCCESS); /* keep compiler happy */
1131 COMMAND_SET(poweroff, "poweroff", "power off the system", command_poweroff);
1134 command_poweroff(int argc __unused, char *argv[] __unused)
1138 for (i = 0; devsw[i] != NULL; ++i)
1139 if (devsw[i]->dv_cleanup != NULL)
1140 (devsw[i]->dv_cleanup)();
1142 RS->ResetSystem(EfiResetShutdown, EFI_SUCCESS, 0, NULL);
1148 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
1151 command_reboot(int argc, char *argv[])
1155 for (i = 0; devsw[i] != NULL; ++i)
1156 if (devsw[i]->dv_cleanup != NULL)
1157 (devsw[i]->dv_cleanup)();
1159 RS->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
1165 COMMAND_SET(quit, "quit", "exit the loader", command_quit);
1168 command_quit(int argc, char *argv[])
1174 COMMAND_SET(memmap, "memmap", "print memory map", command_memmap);
1177 command_memmap(int argc __unused, char *argv[] __unused)
1180 EFI_MEMORY_DESCRIPTOR *map, *p;
1188 status = BS->GetMemoryMap(&sz, 0, &key, &dsz, &dver);
1189 if (status != EFI_BUFFER_TOO_SMALL) {
1190 printf("Can't determine memory map size\n");
1194 status = BS->GetMemoryMap(&sz, map, &key, &dsz, &dver);
1195 if (EFI_ERROR(status)) {
1196 printf("Can't read memory map\n");
1201 snprintf(line, sizeof(line), "%23s %12s %12s %8s %4s\n",
1202 "Type", "Physical", "Virtual", "#Pages", "Attr");
1204 if (pager_output(line)) {
1209 for (i = 0, p = map; i < ndesc;
1210 i++, p = NextMemoryDescriptor(p, dsz)) {
1211 snprintf(line, sizeof(line), "%23s %012jx %012jx %08jx ",
1212 efi_memory_type(p->Type), (uintmax_t)p->PhysicalStart,
1213 (uintmax_t)p->VirtualStart, (uintmax_t)p->NumberOfPages);
1214 if (pager_output(line))
1217 if (p->Attribute & EFI_MEMORY_UC)
1219 if (p->Attribute & EFI_MEMORY_WC)
1221 if (p->Attribute & EFI_MEMORY_WT)
1223 if (p->Attribute & EFI_MEMORY_WB)
1225 if (p->Attribute & EFI_MEMORY_UCE)
1227 if (p->Attribute & EFI_MEMORY_WP)
1229 if (p->Attribute & EFI_MEMORY_RP)
1231 if (p->Attribute & EFI_MEMORY_XP)
1233 if (p->Attribute & EFI_MEMORY_NV)
1235 if (p->Attribute & EFI_MEMORY_MORE_RELIABLE)
1237 if (p->Attribute & EFI_MEMORY_RO)
1239 if (pager_output("\n"))
1247 COMMAND_SET(configuration, "configuration", "print configuration tables",
1248 command_configuration);
1251 command_configuration(int argc, char *argv[])
1256 printf("NumberOfTableEntries=%lu\n",
1257 (unsigned long)ST->NumberOfTableEntries);
1259 for (i = 0; i < ST->NumberOfTableEntries; i++) {
1263 guid = &ST->ConfigurationTable[i].VendorGuid;
1265 if (efi_guid_to_name(guid, &name) == true) {
1269 printf("Error while translating UUID to name");
1271 printf(" at %p\n", ST->ConfigurationTable[i].VendorTable);
1278 COMMAND_SET(mode, "mode", "change or display EFI text modes", command_mode);
1281 command_mode(int argc, char *argv[])
1288 SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
1290 conout = ST->ConOut;
1293 mode = strtol(argv[1], &cp, 0);
1294 if (cp[0] != '\0') {
1295 printf("Invalid mode\n");
1298 status = conout->QueryMode(conout, mode, &cols, &rows);
1299 if (EFI_ERROR(status)) {
1300 printf("invalid mode %d\n", mode);
1303 status = conout->SetMode(conout, mode);
1304 if (EFI_ERROR(status)) {
1305 printf("couldn't set mode %d\n", mode);
1308 (void) efi_cons_update_mode();
1312 printf("Current mode: %d\n", conout->Mode->Mode);
1313 for (i = 0; i <= conout->Mode->MaxMode; i++) {
1314 status = conout->QueryMode(conout, i, &cols, &rows);
1315 if (EFI_ERROR(status))
1317 printf("Mode %d: %u columns, %u rows\n", i, (unsigned)cols,
1322 printf("Select a mode with the command \"mode <number>\"\n");
1327 COMMAND_SET(lsefi, "lsefi", "list EFI handles", command_lsefi);
1330 command_lsefi(int argc __unused, char *argv[] __unused)
1333 EFI_HANDLE *buffer = NULL;
1335 UINTN bufsz = 0, i, j;
1339 status = BS->LocateHandle(AllHandles, NULL, NULL, &bufsz, buffer);
1340 if (status != EFI_BUFFER_TOO_SMALL) {
1341 snprintf(command_errbuf, sizeof (command_errbuf),
1342 "unexpected error: %lld", (long long)status);
1345 if ((buffer = malloc(bufsz)) == NULL) {
1346 sprintf(command_errbuf, "out of memory");
1350 status = BS->LocateHandle(AllHandles, NULL, NULL, &bufsz, buffer);
1351 if (EFI_ERROR(status)) {
1353 snprintf(command_errbuf, sizeof (command_errbuf),
1354 "LocateHandle() error: %lld", (long long)status);
1359 for (i = 0; i < (bufsz / sizeof (EFI_HANDLE)); i++) {
1361 EFI_GUID **protocols = NULL;
1364 printf("Handle %p", handle);
1365 if (pager_output("\n"))
1369 status = BS->ProtocolsPerHandle(handle, &protocols, &nproto);
1370 if (EFI_ERROR(status)) {
1371 snprintf(command_errbuf, sizeof (command_errbuf),
1372 "ProtocolsPerHandle() error: %lld",
1377 for (j = 0; j < nproto; j++) {
1378 if (efi_guid_to_name(protocols[j], &name) == true) {
1379 printf(" %s", name);
1382 printf("Error while translating UUID to name");
1384 if ((ret = pager_output("\n")) != 0)
1387 BS->FreePool(protocols);
1396 #ifdef LOADER_FDT_SUPPORT
1397 extern int command_fdt_internal(int argc, char *argv[]);
1400 * Since proper fdt command handling function is defined in fdt_loader_cmd.c,
1401 * and declaring it as extern is in contradiction with COMMAND_SET() macro
1402 * (which uses static pointer), we're defining wrapper function, which
1403 * calls the proper fdt handling routine.
1406 command_fdt(int argc, char *argv[])
1409 return (command_fdt_internal(argc, argv));
1412 COMMAND_SET(fdt, "fdt", "flattened device tree handling", command_fdt);
1416 * Chain load another efi loader.
1419 command_chain(int argc, char *argv[])
1421 EFI_GUID LoadedImageGUID = LOADED_IMAGE_PROTOCOL;
1422 EFI_HANDLE loaderhandle;
1423 EFI_LOADED_IMAGE *loaded_image;
1426 struct devdesc *dev;
1432 command_errmsg = "wrong number of arguments";
1438 if ((fd = open(name, O_RDONLY)) < 0) {
1439 command_errmsg = "no such file";
1443 #ifdef LOADER_VERIEXEC
1444 if (verify_file(fd, name, 0, VE_MUST) < 0) {
1445 sprintf(command_errbuf, "can't verify: %s", name);
1451 if (fstat(fd, &st) < -1) {
1452 command_errmsg = "stat failed";
1457 status = BS->AllocatePool(EfiLoaderCode, (UINTN)st.st_size, &buf);
1458 if (status != EFI_SUCCESS) {
1459 command_errmsg = "failed to allocate buffer";
1463 if (read(fd, buf, st.st_size) != st.st_size) {
1464 command_errmsg = "error while reading the file";
1465 (void)BS->FreePool(buf);
1470 status = BS->LoadImage(FALSE, IH, NULL, buf, st.st_size, &loaderhandle);
1471 (void)BS->FreePool(buf);
1472 if (status != EFI_SUCCESS) {
1473 command_errmsg = "LoadImage failed";
1476 status = OpenProtocolByHandle(loaderhandle, &LoadedImageGUID,
1477 (void **)&loaded_image);
1483 for (i = 2; i < argc; i++)
1484 len += strlen(argv[i]) + 1;
1486 len *= sizeof (*argp);
1487 loaded_image->LoadOptions = argp = malloc (len);
1488 loaded_image->LoadOptionsSize = len;
1489 for (i = 2; i < argc; i++) {
1490 char *ptr = argv[i];
1492 *(argp++) = *(ptr++);
1498 if (efi_getdev((void **)&dev, name, (const char **)&path) == 0) {
1500 struct zfs_devdesc *z_dev;
1502 struct disk_devdesc *d_dev;
1505 switch (dev->d_dev->dv_type) {
1508 z_dev = (struct zfs_devdesc *)dev;
1509 loaded_image->DeviceHandle =
1510 efizfs_get_handle_by_guid(z_dev->pool_guid);
1514 loaded_image->DeviceHandle =
1515 efi_find_handle(dev->d_dev, dev->d_unit);
1518 hd = efiblk_get_pdinfo(dev);
1519 if (STAILQ_EMPTY(&hd->pd_part)) {
1520 loaded_image->DeviceHandle = hd->pd_handle;
1523 d_dev = (struct disk_devdesc *)dev;
1524 STAILQ_FOREACH(pd, &hd->pd_part, pd_link) {
1526 * d_partition should be 255
1528 if (pd->pd_unit == (uint32_t)d_dev->d_slice) {
1529 loaded_image->DeviceHandle =
1539 status = BS->StartImage(loaderhandle, NULL, NULL);
1540 if (status != EFI_SUCCESS) {
1541 command_errmsg = "StartImage failed";
1542 free(loaded_image->LoadOptions);
1543 loaded_image->LoadOptions = NULL;
1544 status = BS->UnloadImage(loaded_image);
1548 return (CMD_ERROR); /* not reached */
1551 COMMAND_SET(chain, "chain", "chain load file", command_chain);