MFC r335125-r335127, r335148, r335224

r335125:
libsa: cstyle cleanup for open/close/read/write sources

r335126:
libsa: f_rabuf could be NULL

It is possible that we will not get RA buffer from open(), therefore
we must validate RA.

r335127:
libsa: remobe unneeded check before free()

free() is checking for NULL, remove duplicate check.

r335148:
libsa: open() should use NULL instead of typecasted 0

r335224:
Remove empty directory

MFC r330005-r330007, r330021, r330029, r330622, r331207: Solo loader.conf(5)

r330005:
Go back to one loader.conf

We really only need one loader.conf. The other loader.conf was created
because the current one took forever to parse in FORTH. That will be
fixed in the next commit.

r330006:
Take a meat cleaver to defaults/loader.conf

Remove almost all of the _load=XXX options (kept only those relevant
to splash screens, since there were other settings).
Remove the excessively cutesy comment blocks.
Remove excessive comments and replace with similar content
Remove gratuitous blank lines (while leaving some)

We have too many modules to list them all here. There's no purpose in
doing so and it's a giant hassle to maintain. In addition the extra
~500 lines slow this down on small platforms. It slowed it down
so much small platforms forked, which caused other issues...
This is a compromise between those two extremes.

r330007:
loader.conf is loader agnostic, so remove 4th references.

r330021:
These two directories build man pages, so it's incorrect to tag them
NO_OBJ. Also, make sure the loader.conf.5 man gets built and installed.

r330029:
Fix a typo: "now" -> "no".

r330622:
loader.conf(5): Document some other settings

These tend to have less coverage in other places and they don't have
defaults as of yet, so mention them here:
- fdt_overlays
- kernels_autodetect (lualoader only)

r331207:
loader.conf: remove obsolete non-x86 beastie menu statement

As of r330005 the same loader.conf defaults are used on all platforms.

MFC r330004: Add NO_OBJ to those directories that don't make anything.

For directories that don't many anything, add NO_OBJ=t just before we
include bsd.init.mk. This prevents them from creating an OBJ
directory. In addition, prevent defs.mk from creating the machine
related links in these cases. They aren't needed and break, at least
on stable, the read-only src tree build.

PR: 226074

MFC Loader Fixes Final: r327612,r327703,r327704,r327878,r327879,r327881,
r328007,r328029,r328030,r328031,r328061,r328156,r328169,r328288,r328289,
r328290,r328291,r328292,r328411,r328536,r328603,r328614,r328642,r328769,
r328779,r328780,r328781,r328782,r328783,r328806,r328808,r328826,r328835,
r328911,r328986,r328987,r328990,r328999,r329000,r329019,r329050,r329054,
r329060

r327612: Invent new #defines for the biospci_{read,write}_config function

r327703: Define __dmadat after #include'ing ufsread.c.

r327704: Fix printf missing format variables warnings.

r327878: Add GUID for UEFI boot manager variables.

r327879: Report the boot order and where we are in that boot order.

r327881: Allow this file to be included

r328007: Fix booting on some arm64 systems after r327879 by fixing the call
to utf8_to_ucs2

r328029: When returning an error and freeing allocated memory from
ucs2_to_utf8, NULL the return pointer.

r328030: Check the return value from utf8_to_ucs2 instead of whether or not
uv is NULL.

r328031: Need to free uv after we're done using it.

r328061: utf8_to_ucs2() should check for malloc failure

r328156: stand: Move sections around to fix stand/ build with ld.lld on
armv7

r328169: Remove extra copy of bootinfo.c. It's a bit rotted copy of the one
in efi/loader.

r328288: Fix some resource leaks.

r328289: Don't leak memory when displaying help.

r328290: On malloc failure, be sure to close the include file that triggered
it.

r328291: getenv does not return tainted data in the boot loader. Attempt to
clue Coverity into that fact.

r328292: There's no tainted data here, tag it as such to avoid false
positives.

r328411: loader.efi: add missing EFI GUIDs

r328536: loader: support for mixed-endianness ELF/loader and POWER8

r328603: Add missing non-POWERPC case to give the scr value something
non-zero.

r328614: Move libstand.3 to libsa.3. Update libsa.3 to include functions

r328642: Break out the interpreters (simple and forth) w/o ifdefs.

r328769: Centralize several variables.

r328779: Retire pnp.4th and the code needed only for 4th words used here.

r328780: These 4th words were an attempt to allow integration into the boot
loader scripts. However, that path won't be taken after all it
seems.

r328781: Remove pcibios forth support.

r328782: Now that we no longer conditionally compile some files outside of
ficl

r328783: Invent new LDR_INTERP for the loader interpreter to use.

r328806: We need more heap space to properly load newer powerpc kernels.

r328808: Implement strcoll as strcmp.

r328826: Make cross-endian loader changes apply only to powerpc

r328835: Fix regression introduced in r328806, preventing boot on many
platforms.

r328911: Ignore relocation tables for non-memory-resident sections.

r328986: Fix relative location of USB sources after recent move.

r328987: A more definitions to kernel emulation shim in order to build
stand/usb.

r328990: Move the stand/usb test loader into its own directory.

r328999: Fix indentation to FreeBSD standard for interp files

r329000: Move simple interpreter 'perform' into interp.c and call it

r329019: Move to tabs for indentation and to 8-space notches, per style(9).

r329050: Fix build of userboot.so

r329054: Set script.lang in the environment to either 'forth' or 'simple' to
reflect what scripting language was compiled into the loader.

r329060: loader: fix endianness conversion

PR: 225323

MFC Loader Fixes 2017q4p7: r324844,r326089,r326926,r326440,r326484,r326494,
r326588,r326708,r326784,r326914,r327390,r328446,r326090,r326143,r326144,
r326182,r326384,r326421,r326440,r326441,r326442,r326443,r326444,r326445,
r326446,r326447,r326448,r326484,r326485,r326486,r326487,r326488,r326490,
r326491,r326492,r326493,r326494,r326495,r326504,r326507,r326509,r326584,
r326585,r326586,r326587,r326588,r326589,r326590,r326591,r326592,r326593,
r326594,r326600,r326616,r326671,r326707,r326708,r326709,r326710,r326711,
r326712,r326714,r326720,r326768,r326772,r326784,r326792,r326812,r326854,
r326855,r326856,r326858,r326886,r326887,r326914,r326926,r326927,r326960,
r326961,r326962,r326963,r327351,r327453,r327390,r327523,r327524,r326489,
r327880,r328437,r328438,r328439,r328441,r328446,r328448,r328449,r328612,
r328613,r328615

While here, undo our libfdt hack of not including <stdlib.h> if we're
compiling _STANDALONE.

r324844: When building standalone, don't define errno. Let the definition from
stand.h override. This is similar to what we do in the kernel.

r326089: loader.efi: efipart does not recognize partitionless disks

r326090: net_parse_rootpath() has no parameters

r326143: Fix theoretical integer overflow issues. If the product here is

r326144: Mark the func pointer as __dead2. It looks up loader_main, which

r326182: Modify all FreeBSD bootloaders on PowerPC AIM (Book-S) systems

r326384: Use const pointers to avoid casting away constness.

r326421: loader.efi: efipart should exclude iPXE stub block protocol

r326440: Remove stale dependency on ufsread.c

r326441: Minor flags cleanup

r326442: Cleanup CFALGS usage here

r326443: We don't need both _STAND and _STANDALONE, use the latter.

r326444: Move geli to common DO32 stuff

r326445: Fix random() and srandom() prototypes to match the standard.

r326446: Undefine _STANDALONE since this is test code.

r326447: Tweaks to the beri boot loader so that it builds w/o warnings.

r326448: Fix all warnings related to geli and ZFS support on x86.

r326484: Const poison the propname.

r326485: Delcare md_load in libofw.h. Make all prototypes match for ofw

r326486: Include machine/md_var to pick up __syncicache prototype.

r326487: Cast mdp (a vm_offset_t) to void * to match prototype.

r326488: e_entry can be smaller than a pointer. Cast it to an intptr_t

r326490: Declare our strange brand of main().

r326491: Disconnet ps3 from the build. There's too many warnings to fix.

r326492: Cast void * pointer to char * so the arg matches the %s format.

r326493: Provide a md_load64 prototype.

r326494: Mark two things as unused (since they are only sometimes used)

r326495: Now it's safe to bump WARNS to 1.

r326504: Switch to proper MK_LOADER_GELI tests.

r326507: increase maximum size of zfsboot

r326509: loader.efi: add note about iPXE into the efipart.c

r326584: When building standalone, include stand.h rather than the kernel

r326585: Include ficl.h before anything else

r326586: No need to include the userland md5.h, the kernel one is just fine.

r326587: Use the kernel relative paths, rather than the userland relative
paths

r326588: Need to include skein in the include path

r326589: Make sure we include the right path for skein.h

r326590: Prefer stdint.h to inttypes.h

r326591: This isn't NetBSD specific code. Include these for any kernel /

r326592: Don't inherit CFLAGS. This a specialized test program.

r326593: Stop building with the standard system headers.

r326594: Now that we offer a semi-sane standards-ish set of #include files,
stop hacking includes with sed.

r326600: Since this is contrib code, create an upstreamable version of my

r326616: dhcp_try_rfc1048() is not used any more

r326671: Avoid setting -Wno-tentative-definition-incomplete-type with gcc.

r326707: Add partial support signal.h functioanlity. Pull in
machine/signal.h

r326708: Remove _KERNEL hack now that errno.h does the right thing when
built standalone.

r326709: Provide implementations for iscntrl, ispunct and isgraph.

r326710: Put the files we're copying over into a few variables and clean
hings up.

r326711: Const poison a couple of interfaces.

r326712: Create interp class.

r326714: boot1.c needs EFI_ZFS_BOOT too, so add it globally.

r326720: This path belongs in ficl/Makefile, not the common defines for
users

r326768: Fix a comment to be more accurate

r326772: Fix regression with lua import

r326784: Revert part of 362772. It was causing problems for includes

r326792: Attempt to unbreak buildworld

r326812: Revert r326792, r326784, r326772, r326712

r326854: libefi: make efichar.h more usable in stand code

r326855: Cargo cut a fix for the regressions r326585 caused.

r326856: Fix comments after bump in size.

r326858: Revert r326855: Cargo cut a fix for the regressions r326585 caused.

r326886: Panic in sbrk if setheap hasn't been called yet. This is preferable
o a mysterious crash

r326887: Remove the 'mini libstand in libstand' that util.[ch] provided.

r326914: Move loader-only defines to loader.mk from defs.mk

r326926: Move loader help file definitions to being 100% inside of
loader.mk.

r326927: libficl is only ever used in a loader (never a boot) program. Move
it.

r326960: Simplify things a little. The RETURN macro isn't required.

r326961: Interact is always called with NULL. Simplify code a little

r326962: Hoist btx include stuff to i386/Makefile.inc

r326963: No need to use relative paths like this here.

r327351: Fix ubldr. uboot/lib uses defines for the loader.

r327453: Add a validbcd() routine that uses the bcd2bin_data[] array

r327390: Garbage-collect loader.ps3. It is currently disconnected from the
build and kboot replaces.

r327523: Don't clobber system LDFLAGS for beri boot loaders.

r327524: Use 'extern uint8_t' instead of 'extern void' for external symbols.

r326489: Allow this file to be used in libsa without warning...

r327880: Move getsecs() prototype to stand.h from net.h so it can be used

r328437: Split panic routine

r328438: Implement abort() as a call to panic.

r328439: Provide abs form stdlib.h.

r328441: abort() should be marked __dead2 since it won't return.

r328446: Now that exit is __dead2, we need to tag ub_exit() as __dead2.

r328448: Make exit() never return until host_exit can be written.

r328449: Tag unreachable places as such. I left the while (1); in place

r328612: Move strtold wrapper from strtol.c to its own strtold.c.

r328613: Kill copies of strtol and strtoul.

r328615: Update stand.h for changes for strto*l

PR: 223969

MFC r326038,r326069,r326072: More stand simplification and fixes

r326038: Move some more common stuff up to Makefile.inc.

r326069: Fix gptzfsboot for cases with GELI.

r326072: Unbreak riscv build in universe.

MFC r325834,r325997,326502: Move sys/boot to stand/

This is effectively a direct commit to stable/11, due to differences between
stable/11 and head. Changes to DTS in sys/boot/fdt/dts were often
accompanied by kernel changes. Many of these were also risc-v updates that
likely had many more dependencies to MFC.

Because of this, sys/boot/fdt/dts remains as-is while everything else in
sys/boot relocates to stand/.

r325834: Move sys/boot to stand. Fix all references to new location

r325997: Remove empty directories.

r326502: Document the sys/boot -> stand move in hier.7 and the top-level README.

MFC Loader Fixes 2017q4p6: r324649,r324650,r324651,r324652,r324653,r324654,
r324700,r324702,r324709,r324717,r324719,r324841,r324842,r324843,r324845,
r324850,r324876,r324877,r324878,r324879,r324880,r324881,r324883,r324980,
r324981,r324982,r324995,r325014,r325093,r325094,r325114,r325170,r325171,
r325172,r325173,r325174,r325175,r325176,r325248,r325286,r325310,r325332,
r325338,r325339,r325376,r325377,r325379,r325380,r325382,r325478,r325479,
r325480,r325482,r325483,r325484,r325485,r325556,r325641,r325681,r325685,
r325686,r325687,r325688,r325689,r325690,r325691,r325692,r325693,r325694,
r325743,r325744,r325748,r325775,r325779,r325780

r324649: Move common/Makefile.inc to sys/boot/loader.mk.

r324650: tweak style

r324651: create defs.mk for common definitions

r324652: Move all the ficl common code into ficl.mk

r324653: LOADER_foo_SUPPORTED

r324654: Explicitly inlcude SYSDIR in the include path

r324700: loader: initialize dv_cleanup in md.c to eliminate clang warning

r324702: We need to include disk.o in libuboot.a when we're building with
support for disk access.

r324709: Revert "Unify boot1 with loader" change r324646

r324717: libsa/ip.c: misplaced comment, ip_v is half char, not ip_p

r324719: libsa/ip: stop read loop on bad fragments

r324841: Use BOOTDIR more consistently in defs.mk rather than repeat
sys/boot.

r324842: Introduce BOOTOBJ: The top level object directory for the boot tree

r324843: Stopgap fix to the mistmatch between LOADER_GELI_SUPPORT and
LOADER_NO_GELI_SUPPORT.

r324845: Use BOOTOBJ and BOOTDIR to find geli includes and libraries.

r324850: Define LIBSA32 to LIBSA on i386 to fix build.

r324876: Move fdt and uboot defines into common uboot.mk.

r324877: End source directories with SRC rather than a hodgepodge of names

r324878: Make at91 boot loader compile again.

r324879: Prefer SRCTOP paths for bits we're grabbing from libc.

r324880: Use BOOTSRC here.

r324881: Use SYSDIR instead of ${.CURDIR}/../..<etc>/sys.

r324883: Use preferred defined paths, rather than relative paths in fdt.

r324980: Use BOOTDIR consistently.

r324981: Move BINDIR definition to defs.mk, and override where it isn't
/boot

r324982: Remove sys/boot/arm/at91 and ixp425

r324995: loader.efi: Make framebuffer commands available for arm64

r325014: Add a 'place holder' arm struct efi_fb until a real one comes

r325093: Define new EFI variables

r325094: Cleanup non-arch Makefiles

r325114: Use defs.mk defins in most MD code

r325170: Use defs.mk values for userboot

r325171: Use defs.mk name and prefer bsd.init.mk

r325172: Remove the -nostdlib stuff I added. Instead, fix LDFLAGS to be
honored correctly with the new Makefile.inc include order.

r325173: We don't need to build a special ficl for userboot.

r325174: Minor cleanup

r325175: For amd64, compile both zfs and zfs32 libraries.

r325176: Actually add zfs32/Makefile

r325248: loader ptblread() is broken with >512B sectors

r325286: efipart_strategy is using wrong offset with >512B sectors

r325310: zfs.c:vdev_read() needs to be careful about large sectors

r325332: loader: re-enable gzip support for x86

r325338: loader: fix BOOTSRC -> BOOTOBJ in a library path

r325339: This used to have bzip2 support too.

r325376: WIP: centralize machine links

r325377: mostly libsa

r325379: Revert "mostly libsa"

r325380: Revert "WIP: centralize machine links"

r325382: Cleanup stray libstand names to be libsa names.

r325478: Powerpc is a 32-bit boot loader.

r325479: Define LIBFICL32 to be libficl.a on i386 and libficl32.a on amd64.

r325480: Use DO32 for all the places that we need to flag we're building a
32-bit version of a library.

r325482: Move machine and other link creation to defs.mk

r325483: MACHINE can never be powerpc64, so cleanup code that thinks it can.

r325484: Prefer bsd.init.mk to src.opts.mk

r325485: Centralize all 32-bit builds on 64-bit platform stuff.

r325556: loader: set options before including bsd.init.mk

r325641: loader.efi: efi_devpath_is_prefix should return bool

r325681: boot1: avoid using NULL device path

r325685: libsa32 isn't needed for i386. It's already a 32-bit platform.

r325686: Simplify this if to a direct assignment.

r325687: Remove all the empty help files from the powerpc build.

r325688: FDT support doesn't make sense for ps3, remove it.

r325689: Remove LOADER_FDT_SUPPORT as a Makefile variable.

r325690: Remove LOADER_ZFS_SUPPORT as a Makefile variable

r325691: Remove useless PNP define here.

r325692: Replace LOADER_FIREWIRE_SUPPORT variable

r325693: Move LOADER_{NO,}_GELI_SUPPORT to MK_LOADER_GELI

r325694: Install the 4th files in sys/boot/forth instead of each loader

r325743: Make sure the proper loader.rc gets installed.

r325744: boot1: also check for NULL device

r325748: Use proper include file.

r325775: Add loader.conf to the list of files that are MD.

r325779: Add /boot/dts to the list of default modules.

r325780: Don't add /boot/dt*s* but /boot/dt*b*. Stupid think-o.

MFC Loader Fixes 2017q4p5: r324557,r324558,r324559,r324646,r324647

r324557: Rename exit to efi_exit to avoid clashing with libsa exit
definition

r324558: Define prototype for exit and ensure references

r324559: Move panic back into libsa. It's documented in libstand(3) to
belong there.

r324646: Unify boot1 with loader.

r324647: Move orphaned man pages into new man directory from common.

MFC Loader Fixes 2017q4p3: r324460,r324471

r324460: Rather than laying whack-a-mole with including the path to stand.h,
always include it.

r324471: Fix typos: `stand alon{e,g}` should be spelled like `standalone`

MFC Loader Fixes 2017q4p1: r324321,r324359,r324360,r324388,r324449,r324450,
r324451,r324452

r324321: This README file was quite relevant for FreeBSD 3 or 4. No more.

r324359: Add efi_devpath_is_prefix

r324360: Encapsulate ZFS preferences into efi_zfs_is_preferred

r324388: Unbreak building efiboot with MK_ZFS == no

r324449: Prefer ${LIBSTAND} to -lstand

r324450: Define SASRC and use it

r324451: Add missing -I${SASRC} in a couple of places so that stand.h
doesn't accidentally come in via host pollution.

r324452: Define LIBSA* and use them instead of overloaded LIBSTAND

Back out MFC r324558: Define prototype for exit and ensure references

This went terribly wrong

MFC Loader Fixes 2017q3: r320547,r320553,r321621,r321844,r321969,r321991,
r322037,r322038,r322039,r322040,r322056,r322074,r322542,r322592,r322593,
r322896,r322923,r323671,r322930,r322931,r322932,r322933,r322934,r322935,
r322936,r322937,r322938,r322939,r322941,r323062,r323063,r323064,r323065,
r323100,r323131,r323174,r323258,r323261,r323272,r323367,r323379,r323389,
r323407,r323428,r323436,r323494,r323496,r323497,r323541,r323554,r323589,
r323707,r323867,r323885,r323886,r323895,r323896,r323897,r323905,r323906,
r323907,r323908,r323909,r323952,r323991,r324099,r324558,r326445,r326609,
r326610

This batch includes a special kludge to fix powerpc loader build; <stdlib.h>
was included after <stand.h> there, causing problems with DEBUG_MALLOC bits.
Include <stdlib.h> a little bit earlier to fix the build with the intention
of removing this when eventually libsa silently replaces stdlib.h with
stand.h.

r320547: Link EFI/uboot loaders with -znotext

r320553: Integer underflow in efipart_realstrategy when I/O starts after end
of disk

r321621: Always set the receive mask in loader.efi.

r321844: Clean up style in print_state(..) and pager_printf(..)

r321969: Fix the return types for printf and putchar to match their libc

r321991: Revert r321969

r322037: Add stpcpy and stpncpy to libstand

r322038: Add definitions and utilities for EFI drivers

r322039: Move EFI ZFS functions to libefi

r322040: Add EFI utility functions to libefi

r322056: Move EFI fmtdev functionality to libefi

r322074: libefi/time.c cstyle cleanup

r322542: loader.efi: repace XXX with real comments in trap.c

r322592: Remove unused defines.

r322593: Define proposed GUID for FreeBSD boot loader variables.

r322896: Make spinconsole platform independent and hook it up into EFI
loader

r322923: Hide length of geli passphrase during boot.

r323671: Fix language used in the r322923.

r322930: Move efi_main into efi/loader

r322931: Cleanup efi_main return type

r322932: Use the loader.efi conventions for the various EFI tables.

r322933: No need for MK_ZFS around these: they are by their nature only
active when MK_ZFS is true.

r322934: _STAND is sometimes defined on the command line. Make the define
here match.

r322935: Fix warnings due to type mismatch.

r322936: Remove useless 'static' for an enum definition.

r322937: Forward declare struct dsk to avoid warnings when building libi386.

r322938: Link in libefi for boot1

r322939: Use efi_devpath_str for debug path info.

r322941: Eliminate redunant device path matching.

r323062: Make efichar.c routines available to libefi.

r323063: boot1.efi: print more info about where boot1.efi is loaded from

r323064: Exit rather than panic for most errors.

r323065: Save where we're booted from

r323100: libstand: nfs_readlink() should return proper return code

r323131: Revert r322941: Eliminate redundant device matching functions

r323174: Fix loader bug causing too many pages allocation when bootloader
is U-Boot

r323258: ucs2len

r323261: Fix armv6 build

r323272: Be consistent and do return (1);

r323367: Mark init_chroot and init_script variables as deprecated.

r323379: It's been pointed out that init_script at least is useful w/o

r323389: loader.efi: chain loader should provide proper device handle

r323407: boot1 generate-fat: generate all templates at once

r323428: r323389 breaks the kernel build when WITHOUT_ZFS is defined in
src.conf

r323436: boot1: remove BOOT1_MAXSIZE default value

r323494: loader should support large_dnode

r323496: libstand: tftp_open() can leak pkt on error

r323497: libefi: efipart_open should check the status from disk_open

r323541: libefi: efipart_realstrategy rsize pointer may be NULL

r323554: Increase EFI boot file size frok 128k to 384k

r323589: loader: biosmem.c cstyle cleanup

r323707: loader: biosmem allocate heap just below 4GB

r323867: libefi: devicename.c cleanups

r323885: libefi: efi_devpath_match() should return bool

r323886: libefi: efipart.c should use calloc()

r323895: libefi: efi_devpath_match local len should be unsigned

r323896: r323885 did miss efilib.h update

r323897: efilib.h: typo in structure member description

r323905: libefi: pdinfo_t pd_unit and pd_open should be unsigned

r323906: libefi: efipart_strategy() should return ENXIO when there is no
media

r323907: libefi: efipart.c cstyle fix for efipart_print_common()

r323908: libefi: efipart_hdinfo_add_filepath should check strtol result

r323909: libefi: define EISA PNP constants

r323952: After the r317886 support for TFTP and NFS can be enable
simultaneously.

r323991: libefi: efipart_floppy() will should not pass acpi pointer if the
HID test fails

r324099: Compile loader as Little-Endian on PPC64/POWER8

r324558: Define prototype for exit and ensure references

r326445: Fix random() and srandom() prototypes to match the standard.

r326609: Make putenv and getenv match the userland definition

r326610: Fix random() prototype to match the system.

PR: 219000 221001 222215
Relnotes: yes ("The length of the geli passphrase is hidden during boot")

MFC (conceptually) r328107: Add /boot/overlays

This is a direct commit to stable/11, due to path changes in HEAD. Diffs
have been applied on top of stable/11, with exception to the change to
forth/loader.conf. forth/loader.conf has seen additional changes in HEAD
mthat are not being MFC'd to stable/11, so the addition of /boot/overlays to
its module_path is not necessary.

MFC r328107: stand: Add /boot/overlays for separation of overlays from DTB

This matches directory structure used commonly in Linux-land, and it's
cleaner than mixing overlays into the existing module paths. Overlays are
still mixed in by specifying fdt_overlays in loader.conf(5).

MFC (conceptually) r326752, r326754:

This is a direct commit to 11-stable, because the code has moved and
the directories have been restructured in 12-current, but it just hand-
applies the same patches to the corresponding files in their old locations.

r326752:
Save and restore r9 register in arm ubldr. In old gcc 4.2, r9 was a callee-
saved register, but in arm EABI it may be either callee-saved or dedicated
to some special purpose (such as a TLS pointer). It appears clang does not
treat it as a callee-saved register (instead using it as another work
register, similar to r12).

Another important side effect of these changes is that saving an extra
register in the push/pop statements keeps the stack aligned to an 8-byte
boundary during the self_reloc() call, as it always should have been.

As stated in the PR...

Essentially the important caller-saved registers are pushed (r0, r1, r9, lr)
before the relocation call, and popped after. Then r8/r9 are saved as usual
for the syscall trampoline, and lr is stored in r8 (now free) as a
callee-saved value before calling into `main`.

The call to `main` can no longer be a tail call because we must restore r9
especially after main returns (although since we have used r8 to hold lr we
must also restore this).

r326754:
When building for arm arches, set PKTALIGN to the max cache line size
supported by the arch, to meet u-boot's requirement that I/O be done
in cache-aligned chunks.

PR: 223977 224008

MFC r316119 (by ngie):

self_reloc.c: Pass -Wno-error=maybe-uninitialized to gcc versions
greater than 4.2.1

MFC r316374, r316377:

Preserve the registers containing argc, argv, and return address values
passed in from u-boot across the call to self_reloc and any other early-init
code, and restore them before calling main().

Correct a comment... the stack used by ubldr is the same stack u-boot was
running on when it jumped to the ubldr entry point. None of the arches
that use this code set up a different stack in their start.S routines.

MFC r314505:
Split the ficl CFLAGS when they refer to an arch-specific include path.

This is a minimal attempt to keep consistency in the Makefiles so that
moving ficl to somwehere like contrib will be less error prone.

MFC r310124 (by andrew):

Add -fPIC to the ubldr build. Without this the self relocation code will
try to use an absolute address in a switch statement, jumping to an invalid
memory location.

Sponsored by: ABT Systems Ltd

PR: 216504

MFC r310267: Deduplicate loader vers.c Makefile rules

The Makefile rule to create vers.c for loader version info was
previously duplicated in each of the various loader Makefiles.
Instead, share a common rule in Makefile.inc.

Sponsored by: The FreeBSD Foundation

MFC r307238:

Stop closing the network device when netbooting for loaders using the common
dev_net.c code.

The NETIF_OPEN_CLOSE_ONCE flag was added in r201932 to prevent that behaviour
on some architectures (sparc64 and powerpc64) the default was left to always
open and close the device for each open and close of a file by the loader
because it was necessary for u-boot on arm.

Since it has been added, the flag was turned on for every arches including the
u-boot loader for arm.

This also fixes netbooting on RPi3 (tested by gonzo@)

For the loader.efi it greatly speeds up netbooting

Reviewed by: emaste, gonzo, tsoome
Approved by: gonzo
MFC after: 1 month
Sponsored by: Gandi.net
Differential Revision: https://reviews.freebsd.org/D8230

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

sys/boot: spelling fixes in comments.

No functional change.

Cleanup unnecessary semicolons from the kernel.

Found with devel/coccinelle.

Align the start of the text segment to an 8-byte boundary. This fixes
alignment aborts in ubldr.bin for RPi that started happening with clang 3.8
(earlier clang apparently didn't generate strd instructions that trigger
the alignment fault). The abort happened in ubldr.bin and not ubldr (elf
version) because the elf headers are 0xf4 bytes long, and stripping them
off left everything 4-byte aligned.

While here, also stop aligning the data segment to a page boundary, align
it to 8 bytes instead (aligning to a page just needlessly makes the file
bigger); pointed out by andrew@.

RBX_ defines are in rbx.h, move it there.

Differential Revision: https://reviews.freebsd.org/D5038

Move all the separate copies of the same strings into paths.h. There's
nothing machine specific about these.

Differential Revision: https://reviews.freebsd.org/D5038

Revert r293903

Revert r293903 as EFI shouldn't be built on this platform that the this
was reported on.

Sponsored by: Multiplay

Fix GCC warnings causing build failure after r293724

Disable some compiler warnings for GCC (non-standard compiler) fixing
build failures introduced by r293724, which enabled WARNS in the EFI boot
code, when compiling with none standard compiler (GCC).

Raised by: ian
MFC after: 2 weeks
X-MFC-With: r293268
Sponsored by: Multiplay

move the prototype to the lib.h header.. This makes more sense, and
it's an API between boot2.c and arm_init.S which calls it..

other fixes to make boot2 compile for IXP... Properly end the asm
sections, and for some reason, main needs a prototype... If someone
has a better fix, I'm all ears...

Pointed out by: Berislav Purgar

revert r278579, this is in a different compile environment than the
kernel, and needs to be named cpu_id...

Pointed out by: Berislav Purgar

Install loader.rc with ARM u-boot loader (ubldr).

loader.rc is the responsible to read and process loader.conf variables.

This fix the issue of loader.conf being silently ignored.

MFC after: 3 days

Enable the NETIF_OPEN_CLOSE_ONCE option for ubldr. This keeps the network
interface open continuously instead of closing it after each filesystem
access and reopening it before the next (causing it to re-obtain network
params each time). This vastly speeds up netbooting.

Re-link ubldr when any of its libraries change.

Create a relocatable instance of ubldr for ARM. The original ubldr,
static-linked to run at a fixed position, is still installed to maintain
compatibility with existing configurations. The makefile now also creates
and installs ubldr.bin, a stripped binary (no elf headers) with an entry
point offset of 0 that can be loaded by u-boot at any address and launched
with "go ${loadaddr}".

To use ubldr.bin, U-Boot must still be built with the CONFIG_API option,
but no longer needs the CONFIG_ELF option.

Move the text section to the start of the output file, so that when you
create a stripped .bin file from it the entry point is the first byte of
the file. (Will allow "load $addr $file ; go $addr" in u-boot.)

Revert .PATH changes to fix mips build.

Reported by: bz
Pointy hat to: jkim

Install newly added brand-*.4th and logo-*.4th files and reduce duplication.

Reviewed by: dteske
Pointy hat to: dteske

Summary: Update CPU identification call to recent version.

Create a custom /boot/defaults/loader.conf for ARM. This differs from the
standard file in the following ways:

- modules_path includes /boot/dtb
- It doesn't contain 533 lines, of which 500 are either commented out,
empty, or something_which_doesnt_work_on_arm_anyway=NO

The standard defaults file takes 40+ seconds to process on an arm beaglebone
board. This one takes just a couple seconds.

This gets installed instead of the original because of the .PATH magic in
the makefile.

Convert a couple lingering NO_FORTH conditionals to test MK_FORTH.

Start to allow platforms other than U-Boot to use the FDT code in loader by
moving U-Boot specific code from libfdt.a to a new libuboot_fdt.a. This
needs to be a new library for linking to work correctly.

Differential Revision: https://reviews.freebsd.org/D1054
Reviewed by: ian, rpaulo (earlier version)
MFC after: 1 week

Remove MK_ARM_EABI, the armeb issues have been fixed. The code to support
the oabi is still in the tree, but it is expected this will be removed
as developers work on surrounding code.

With this commit the ARM EABI is the only supported supported ABI by
FreeBSD on ARMa 32-bit processors.

X-MFC after: never
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D876

Add a 'ubenv import' command to import environment variables from the
u-boot env into the loader(8) env (which also gets them into the kernel
env). You can import selected variables or the whole environment. Each
u-boot var=value becomes uboot.var=value in the loader env. You can also
use 'ubenv show' to display uboot vars without importing them.

Enable at91 systems to boot from high capacity SD cards.

This also fixes a few minor violations of the SD protocol, such as running
the bus at high speed during the card identification sequence.

The sdcard_init() routine now probes for SDHC cards so that later read
requests can make needed adjustments between block and byte offsets based
on card type.

There is a new MCI_readblocks() function that takes block number and block
count parameters instead of byte-offset values. Using this routine, boot
loader code can load a kernel from any location on an SDHC or standard SD.

The old MCI_read() interface remains unchanged so that existing customized
boot loader code will still keep working without changes. Using this
routine, boot loaders can load a kernel from anywhere in the first 4GB of
an SDHC card (or of course any location on a standard SD card).

A new sdcard_use4wire() routine allows boot loaders to request 4-bit
transfers; it should be called after sdcard_init(). The sdcard_init()
routine no longer assumes the hardware is 4-wire capable and by default
sets things up for 1-bit transfers. (4-wire mode is unreliable on
at91rm9200, works on later SoCs.)

PR: 155894
Submitted by: me. years ago.

The 'flags' variable is conflicting with some inline code in a header file
("variable flags shadows a global..."), just rename this variable to
wish away the problem.

Eliminate "no previous prototype for main" warnings.

Silence a clang warning about a while loop with an empty body.

Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit. Instead use (1U << 31) which gets the
expected result.

This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.

A similar change was made in OpenBSD.

Discussed with: -arch, rdivacky
Reviewed by: cperciva

Recent versions of U-Boot require us to also backup and restore r9 for API
calls to work.

Always build ubldr as a soft-float binary as there is no support for VFP
this early on in the boot process.

Fix ixp425 boot2 with ARM EABI:
- libkern is missing __aeabi_llsl, implement this by calling __ashldi3.
- Because of how the asm entry macros are defined the boot2 code
requires the unwind symbols to exist, include them in boot2.

Approved by: re (marius)

Install Forth infrastructure along with ubldr.

Note: loader.rc is installed as loader.rc.sample
so that by default, none of this is actually used.

Convert old make variable modifiers :U and :L to bmake :tu and :tl.

Reviewed by: sjg

When running on armv6, set alignment checking to modulo-4 mode rather
than modulo-8, because clang emits ldrd and strd instructions for
addresses that are only 4-byte aligned

Provide verbose help for fdt commands on platforms that use it.

* Add the integer div & mod functions and ARM EABI support functions to
libstand.
* Stop linking the ARM U-Boot loader against libgcc now libstand has the
required symbols.

Link against compiler-rt to pull in the required __aeabi_* functions

Ignore a warning in ubldr where clang doesn't understand the %D printf
specifier from libstand.

Handle LOADER_NO_DISK_SUPPORT knob in the arm and powerpc ubldr.

Use the pin number rather than the hybrid pin number + name.

Generalize this for loading the loader into the SPI. Plus trim about
100 bytes from the binary with silly tricks. Hope to get this small
enough to run on the models that have 4k SRAM. We are close compiled
for the at91rm9200, but still need to trim for the target.

Allow other SOCs to be compiled in, first step.

Strip out the useless junk. All we really care about is the text,
data and bss sections. All the rest is needed for normal binaries,
but boot loaders aren't normal.

Allow the load address used by ARM ubldr to be set via Make argument.

In particular, this simplifies scripts that build system
images.

Use 32-bit ufs_ino_t instead of ino_t to keep boot2 small and prevent
unnecessary 64-bit math on 32-bit machines.

Sponsored by: Google Summer of Code 2011

Import work done under project/nand (@235533) into head.

The NAND Flash environment consists of several distinct components:
- NAND framework (drivers harness for NAND controllers and NAND chips)
- NAND simulator (NANDsim)
- NAND file system (NAND FS)
- Companion tools and utilities
- Documentation (manual pages)

This work is still experimental. Please use with caution.

Obtained from: Semihalf
Supported by: FreeBSD Foundation, Juniper Networks

Add support for passing in the board ID.

# This doesn't implement the full Linux boot ABI for arm yet.
# since there's no ATAGs list passed in for r2, and r0 has
# boot options rather than 0 as specified in the standard.
# Commited code to the tree won't touch any of this anyway, but
# future code may be able to use this.

Hack to unbreak boot2 for at91rm9200 boot loader. When the at91sam
code came in, it moved things around which wound up breaking the
build. We have to do this bit of a hack to avoid duplication of a lot
of #defines.

Remove some redundant register loads.

Discussed on: arm@

Replace `inline static' by `static inline'.

If I interpret the C standard correctly, the storage specifier should be
placed before the inline keyword. While at it, replace __inline by
inline in the files affected.

Look for /boot/config in addition to /boot.config, with the former taking
precedence over the latter if it exists.

MFC after: 3 weeks

Allow ixp425 boot2 to compile after r219452

No need to list an obsolete arm compiler here.

Don't need __DYNAMIC here. it is commented out and a.out only -- these are all ELF.

We no longer need the OUTPUT_FORMAT line, so fix the build by removing it.

Fix typos.

PR: bin/148894
Submitted by: olgeni

MFtbemd:

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

It turns out that the OUTPUT_FORMAT should do the right thing for both endians...

MF tbemd: differentiate between arm and armeb

Fix conditional FDT support in loader(8).

Initial loader(8) support for Flattened Device Tree.

o This is disabled by default for now, and can be enabled using WITH_FDT at
build time.

o Tested with ARM and PowerPC.

Reviewed by: imp
Sponsored by: The FreeBSD Foundation

BWCT boards can have 128MB SDRAM.

fix signed warning

Merge support for Gateworks Cambria boards:
o add support for IXP435 cpu's (e.g. 64 irq's)
o add support for Cambria-specific devices: npe, led's (front panel and
octal latch), ehci, mcu, ide cf
o redo memory mapping for xscale/ixp4xx boards: previously memory
was assumed aliased to 0x10000000 but this appears to be true only
for ixp425 systems and breaks operation on others; rework so memory
is assumed to start at 0
o rework NPE configuration support to use NPE id's instead of port #'s;
these changes also rename the associated MAC's to follow the NPE's
they are attached to
o update npe firmware to latest rev (same license) and update default fw
imageid's to match; in particular this adds NPE-A and crypto support
o re-style NPE fw handling code and add a console msg identifying the
attributes of the loaded fw
o fix numerous problems with handling failures during npe setup
o fix npe rx q setup; need to spin waiting for mailbox responses during
early boot stages as qmgr interrupts are not delivered; this fixes
the problem where all 8 traffic classifications were not tied to the
rx q (and eliminates the console msg "remember to fix rx q setup")
o add DELAY to npe MII wait logic for IXP435
o strip down builtin phys->virt address translation table in resource
handling to just those resources that require it and add a console msg
to alert people when this (kludge) table needs to be extended
o purge a bunch of dead netbsd-ism's
o cleanup avila led driver
o add Cambria support to boot2 and rework code for better multi-board support

Notes:
1. NPE-A doesn't work and causes NPE-C to stop working; it is disabled
in the hints
2. USB isn't working yet; controller communicates ok but device
discovery fails
3. Cambria support must be configured separately from IXP425 boards;
multi-board support is TBD

Sponsored by: Hobnob, Gateworks (board donation)
Reviewed by: imp

Let ARM loader(8) build with the man page.

Initial storage functionality for U-Boot support library.

- Only non-sliced bsdlabel style partitioning is currently supported (but provisions
are made towards GPT support, which should follow soon)
- Enable storage support in loader on ARM

Obtained from: Semihalf

Initial support of loader(8) for ARM machines running U-Boot.

This uses the common U-Boot support lib (sys/boot/uboot, already used on
FreeBSD/powerpc), and assumes the underlying firmware has the modern API for
stand-alone apps enabled in the config (CONFIG_API).

Only netbooting is supported at the moment.

Obtained from: Marvell, Semihalf

More diff reductions against ixp425/boot2/boot2.c. This time, we
bring in FIXUP_BOOT_DRV functionality as an #ifdef. This is not
enabled at this time, and the md5 remains constant with this change.
Apart from the 'accept any partitioning scheme on the device' changes,
this was the biggest delta...

# and yes, we'll merge these into one source file if we can do that in a
# way that makes sense.

Obtained from: sys/boot/arm/ixp425/boot2/boot2.c

Diff reduction with boot/arm/at91/boot2/boot2.c: indent this statement
correctly.

don't hardcode cc

Submitted by: Andrey Eltsov

Add a boot loader for ixp425 based boards like the Gateworks Avila
and ADI Pronghorn Metro with Redboot on them.

Bring in the trivial differences between this code and John Hay's new
code. Added a copyright for the work I did to this file a couple of
years ago. Add John's copyright too, since I'm sure I'll be pulling
more into this code. This also implements a new -n option to not
allow breaking into the boot sequence which was original in the patch
John posted (not in the original i386 code I based this boot2.c on,
only the name is the same). I haven't checked to see if he did that,
or if it was one of Sam's improvements.

Submitted by: jhay@

Remove XMODEM_DL support. It never was complete and only serves to
increase the diffs with other arm boot2 loaders.

Indent with 8-space tabs. This reduces the diffs to the newer ixp425
boot2 and may make it easier to merge these files in the future...

Enable GCC stack protection (aka Propolice) for userland:
- It is opt-out for now so as to give it maximum testing, but it may be
turned opt-in for stable branches depending on the consensus. You
can turn it off with WITHOUT_SSP.
- WITHOUT_SSP was previously used to disable the build of GNU libssp.
It is harmless to steal the knob as SSP symbols have been provided
by libc for a long time, GNU libssp should not have been much used.
- SSP is disabled in a few corners such as system bootstrap programs
(sys/boot), process bootstrap code (rtld, csu) and SSP symbols themselves.
- It should be safe to use -fstack-protector-all to build world, however
libc will be automatically downgraded to -fstack-protector because it
breaks rtld otherwise.
- This option is unavailable on ia64.

Enable GCC stack protection (aka Propolice) for kernel:
- It is opt-out for now so as to give it maximum testing.
- Do not compile your kernel with -fstack-protector-all, it won't work.

Submitted by: Jeremie Le Hen <jeremie@le-hen.org>

- remove code from oroginal file, which is not required on BWCT boards
- Be more chatty on startup, since we have enough code space on
AT91RM9200
- init DS1672 charging
- init USART GPIO

BWCT boards uses two different SPI flash chips
check for both status codes

Use the smaller cgbase() macro in ufsread.c if UFS_SMALL_CGBASE is
defined. This lets each boot program choose which version of cgbase() it
wants to use rather than forcing ufsread.c to have that knowledge.

MFC after: 1 week
Discussed with: imp

Fix signedness to make gcc happy.

Load the bytes into the EMAC's MAC address register in the proper
order. The kernel used to shuffle them around to get things right,
but that was recently fixed. This makes our boot loader match the
behavior of most other boot loaders for the atmel parts. This bug was
inherited from the Kwikbyte loader that we started from.

This bug was discovered by Bj?\027.A?\027Nvrn K?\027Nvnig back in June, but fell on the
floor. He provided patches to the kernel, include backwards
compatibility options that were similar to Olivier's if_ate.c commit.

Don't pass RB_BOOTINFO to the kernel. There's no bootinfo actually
passed into the kernel, and the kernel will soon grow that ability on
arm.

Approved by: re@ (blanket)

Use the .S version for now. I have a version optimized for size p4,
but I'm unsure of its provenance, so rather than add it here, revert
the migration to it.

Approved by: re@ (blanket)

MFp4:
Add support for the CENTIPAD board (http://www.harerod.de/centipad/index.html)
(which is a very cool, very small ARM board)
Add support for KB9202B (it has different memory)
Make BOOT_FLAVOR settable
Minor cleanup nits

Approved by: re@

Loop on sdcard init. This helps if one hasn't plugged in the card
fast enough, or there's other issues that cause the first try to fail.

RTC_TIMR's RTC_SEC field is BCD. That makes it unsuitable for
GetSeconds(). Instead, use CRTR register shifted right 15. This
gives us a range of 32 seconds we can do for timeout.

Shift to using == rather than < or > for calculating the timeout,
since if we can't read the ST_CTRT register twice in a second we have
even bigger problems to worry about, and == deals with the 'wrap'
issue.

This lets me type at the boot2 prompt again! Woo Hoo!

Bogusness noticed by: tisco
Pointy Hat to: That silly imp guy

Since we're about to set ST_RTMR to 1 to increase the accuracy of the
CRTR register to be 1/32768th of a second in init, we don't need to do
it here.

All SD cards have a block size of 512. The READ_BL_LEN field in the
CSD is usually 512 (well, 9), but for 2GB (and the rogue 4GB SD cards)
it is 1024 (or 2048 for 4GB). This value doesn't work for the block
read commands (which really want 512). Hardcode 512 for those. This
may break really old MMC cards that don't have a 512 block size (I've
never seen one: make my day and send me one :-), but since the MMC
side of the house is currently broken, it should only have the effect
that 2GB (and non-conforming 4GB) SD cards will work.

My 'non-conforming' 4GB SD card also works now too. The
non-conforming 4GB SD cards were sold for a while before the SD
association was worried they would be (a) incompatible (different FAT
flavor on them) and (b) confusing for the new SDHC standard and
cracked down on suppliers' bogus use of the SD trademark...

Various buglets fixed (from submitter):

The changes to getstr() is so that the character that is
passed in to it, is also processed just as the rest. I also
removed one of the getc() calls otherwise you loose every
second character.

I also changed the strcpy of kname, so that it only happens if
kname is '\0'. This is so that one can pass a kernel in
through /boot.config.

The last change to boot2.c is in parse(). If you tried to type
a kernel name to boot, the first character was lost, the arg--
fix that.

Submitted by: jhay

Fix problem where memcmp would return true in the case where the
character after the character that was the same.

Submitted by: jhay

Fix off by one error in length of the string.

Submitted by: jhay

Remove vestiges of very specific fpga support for my company's board.
It isn't relevant to FreeBSD as a whole, breaks the build, and isn't
even needed for my company's boards anymore...

MFC After: 2 weeks

MFp4: differences for bwct ethernet attachment

MFp4: Differences in flash part for bwct. need a more generic way to cope.

MFp4: Add timeout to eeprom access for lame eeprom that go awol

MFp4: bwct memory size and PLL parameters

MFp4: bwct boot rom is different. need a more generic way to cope long term.

MFp4: Delay a second or two after the upload before printing Done.
Add an automatic reset for remote operational luvin' goodness.

MFp4: bwct is a new board choice.

Mfp4: Remove mci_device.c. It should have been removed when it was
merged ito sd-card.c, but this is an imperfect world.

Move to using a common arm_init.S. These things are more similar than
different at this point.

MFp4: Don't fix the size at 8k, and some minor cleanups. andre@ contributed
to fixing this problem.

MFp4: Improvements, including the ability to download to an arbitrary
part of the spi flash.

Tweaks for better boot flavor support.

Mfp4: We no longer need ee.h included here.

MFp4: boot2 should now build

MFp4: boot on KB9202 correctly. Also, reduce the size of the SD/MMC driver
somewhat.

MFp4: Support KB9202 booting better

Fix typo

MFp4: Make boot2 work on Kwikbyte KB9202 boards.

MFp4: Merge a slightly more generic build infrastructure.

MFp4: Remove bogus \r

Don't descend into at91 until we sort out the boot loader issues more generally

MFp4: default to not loading the fpga

MFp4: Update to smaller code footprint.

MFp4: Move to smaller code footprint.

MFp4: Move to smaller code. This was somehow forgotten before.

There's no fpga.c, so omit it.

MFp4:

Massive update. The highlights:
o dramatically cut memory usage by writing better, less intertwingled
code.
o implement booting off mmc/sd cards (sd only tested one at the moment)
o start to split out board specific stuff for boot2.

Build at91

Support compiling as part of world

MFp4: changes since .s -> .S rename. Use correct header for size

MFp4: First cut at making spi and/or sd card booting work, needs work

MFp4:

Tidy up a bit. Make sure that the burned image matches the downloaded
one.

MFp4:

Simplify life a little for such a simple program.

MFp4: Integrate a boatload of bug fixes from p4. We're right on the
8k boundary with this program still.

text data bss dec hex filename
7925 4 4476 12405 3075 bootiic.out

so we have like 293 bytes left before we have to play games. There
may be ways to reduce that somewhat, but they start to be very board
specific.

MFp4:

Reach over into the arm tree to grab some at91 definitions.
Better warnings
Lots of build tweaks

MFp4: remove obsolete files

MFp4:
Remove obsolete files in list
Add spi flash reading routines

MFp4: Numerous changes from p4 to try to improve tftp downloading,
reduce code footprint, etc. While some problems still remain, the
reliability of tftp is much improved.

MFp4: consolidate #include files down to lib.h

MFp4: These will migrate to the boot specific directories because they
are too hard to share between the different boot loaders.

MFp4: Make it clearer that the address passed to the eeprom routines is
really an offset within the eeprom device, and not a IIC address.

MFp4: Catchup with migration of some defines.

MFp4: Tweaks for our board.

MFp4: Increase character timeout to 10. Make it a #define for easier
changes in the future. This helps with getting started and to
overcome the really sucky level of granuality this timeout has in
getc. A timeout of 1 means 'wait until top of next second' rather
than 'wait for at least a second'.

Add a dummy makefile to keep build happy

MFp4:
Make getc(0) polling (this has the happy side effect of saving
8 bytes in the generated code).

MFp4: Loop forever getting characters... A kludge for now.

MFp4: Integrate support for building tag support for linux booting.

MFp4:
Init eeprom here now that we don't init the eeprom in arm_init.s
and read in the second 8k of the data.
Tweak formatting.

Move from arm_init.s -> .S. #ifdef linux vs freebsd defaults for the
boot loader (linux booting helps regression testing). No repo copy
because of limited history.

MFp4: formatting nits and minor style changes that likely won't matter.

Allow one to enable building tags. Check the size of the boot imag.

MFp4:

On the KB9202 go ahead and enable the flash controller so the boot
loader can access the parallel flash.

MFp4:

Make this compile, assuming that you have linux installed in a
sensible place. tag_list is disabled by default, since we don't
distribute linux, but it is desirable to allow the boot loader to boot
Linux or FreeBSD (mostly for testing).

MFp4:
Minor diffs to reduce diffs to p4.

spi flash updating boot loader. upload this file for the recovery
xmodem download. Then download the image you want in the flash.
This will burn the image into the flash. You must then reset the
unit and the new flash image will be used for booting...

iic eeprom updating boot loader. upload this file for the recovery
xmodem download. Then download the image you want in the eeprom.
This will burn the image into the eeprom. You must then reset the
unit and the new eeprom image will be used for booting...

Add boot0iic and boot0spi. These are 'shortcut' boot loaders designed
to replace either a bad iic eeprom with one you download with xmodem,
or likewise with a spi flash.

MFp4 (checkpoint of work in progress):

o Use a directory layout that is more akin to the i386 boot layout.
o Create a libat91 for library routines that are used by one or more
of the boot loaders.
o Create bootiic for booting from an iic part.
o Create bootspi for booting from an spi part.
o Optimize the size of many of these routines (especially emac.c). Except
for the emac.c optimizations, all these have been tested.
o eliminate the inc directory, libat91 superceeds it.
o Move linker.cfg up a layer to allow it to be shared.

Fix style nit noticed by bde.

Add commented out define for TSC board's boot0.

MFp4:

For 32-bit SDRAM systems, enable D16 to D31 in the PIO controller.
Otherwise they read back as 0xffff.

Shave 8 bytes from the object size by using AT91C_BASE_PIOA directly
and by not assigning PIO_BSR to 0 in the DBGU init. That's a nop in
two ways (everything defaults to peripheral A, and writing 0 changes
nothing).

Merge from p4:

Many places used #define FOO ((unsigned int) 0x23) where a simpler
#define FOO 0x23u would have sufficed. This practice is overly
verbose and has the disadvantage that you can't say

#if FOO == BAR
#endif

because the extra "unsigned int" tokens choke cpp's little brain.
Migrate to the latter style to allow use in preprocessor statements.
The two are the same semantically anyway in a C context (at least for
the uses they are put to presently, C gurus can explain to me how they
differ).

Need at91rm9200_lowlevel.h for SDRAM_BASE definition.

Common register definition for AT91RM9200

Recovery boot loader for the AT91 family of processors. Download it
via xmodem to the DBGU port when the AT91 comes up in recovery mode.
The recovery loader will then load your program via xmodem into SDRAM
at 1MB which can do its things. It needs to be tweaked to the
specific board one is using, but it fits in < 1kB (all of Atmel's ARM
products have at least 8kb of SRAM that I can tell, so this should
work for them all).

Parts of this code were provided by Kwikbyte with copyright
specifically disclaimed. I heavily modified it to act as a recovery
loader (before it was a bootstrap loader) and to optimize for size
(before I started the size was closer to 8k).

Bootstrap loaders for SPI and IIC to follow.