Previously the version string was special cased in the USB stack
because the build system prevented the inclusion of ec_version.h in
any file other than common/version.c. This lead to common/version.c
being the only place that the USB version string could be computed
and thus the special case of filling in the version string descriptor
at run time. This made the USB stack more complex, and lead to the
common/version.c file including usb.h, which is actually STM32
specific.
Now, the portion of ec_version.h that is deterministic is only
updated when something in the tree actually changes (by way of a
conditional in the makefile), and ec_version.h no longer has to
depend on all object files (other than the special version.o).
This allows anyone to include ec_version.h as needed. In particular,
each board that wants to define a USB version string can directly
include ec_version.h and do so.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
BRANCH=None
BUG=None
TEST=make buildall -j
touch files and verify rebuilds happen correctly
Change-Id: Ic84d0b9da90f82ebb4630fb550ec841071e25a49
Reviewed-on: https://chromium-review.googlesource.com/227211
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
The serial console works. Nothing else is implemented yet.
BUG=none
BRANCH=ToT
TEST=make buildall -j
To build,
make BOARD=cr50 hex
Testing the result requires a development board. I have one. It
works with HW revision m3.dist_20140918_094011
Change-Id: I718d93572d315d13e96ef6f296c3c2796e928e66
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/226268
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
The Zinger RW is now signed with 2048-bit RSA key (using SHA-256 as
digest).
This CL implements the verification mechanism.
note: the RSA key used for signing must be provided as a .pem file.
The path to .pem file must be provided in the PEM environment variable.
By default, it's using the dev key stored in zinger_dev_key.pem.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=samus
BUG=chrome-os-partner:28336
TEST=on Zinger, run with properly signed RW firmware and corrupted
firmware and check the serial traces.
Change-Id: Ia58482458904a3ed72d6b0e95996cae86a0ead83
Reviewed-on: https://chromium-review.googlesource.com/220178
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
This ensures that nothing previously flashed to the baord can
interfere with the flashing operation (by wedging the MCU or
putting it into a state that the falshing code can't handle).
This also adds a dependency on ec.bin to the flash
target, ensuring that the firmware image is up to date
when flashing.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
BRANCH=none
TEST=make buildall -j
Change-Id: I8cdfa6f5c84ed84d6b6e6b30d6683a23087f2c63
Reviewed-on: https://chromium-review.googlesource.com/215991
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
Previously if you were working on a single board you had to add BOARD=
to all of your make command lines. Now if you are in a board directory
you can just use "make", or "make clean", or any other top level make
command.
This commit also adds support for a top level "make flash" command that
can be used from the board directories as well. This command uses
openocd and requires that the board provides an openocd-flash.cfg file.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
BRANCH=none
TEST=(from a few board directories) make clean; make -j
(from the discovery-stm32f072 directory) make flash
Change-Id: Ie09a74881371169a2c3cd9cd9922f39f4873f1a6
Reviewed-on: https://chromium-review.googlesource.com/209669
Tested-by: Anton Staaf <robotboy@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Queue: Anton Staaf <robotboy@chromium.org>
When not using gold as the linker the ordering of libraries
with respect to objects and source files is important.
Previously the build placed -l libraries before source and
objects on the gcc command line. This doesn't work with
the default ld linker because since none of the symbols in
the libraries are yet required they are thrown out before
their uses are found in the objects and source.
BUG=none
BRANCH=none
TEST=make buildall
Change-Id: Ic9f83ba6138d6592d3b6e28de6fb0688e664f480
Reviewed-on: https://chromium-review.googlesource.com/202469
Tested-by: Anton Staaf <robotboy@google.com>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Anton Staaf <robotboy@google.com>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
'make buildall' spews out a long long long message, and when an error
occurs, it's sometimes hard to spot the error message. By adding a
explicit success message after a successful run, one can just look for
that success message to determine if it failed.
BUG=None
TEST=Build and see success message.
TEST=Introduce an error, build, and check there is no success message.
BRANCH=None
Change-Id: Ia5468342ad2eb5378c3e10774ed81c5c91f002a2
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/200618
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
For targets not using the common runtime functions, the current test
content does not make much sense and fails to build properly :
de-activate the tests build in that case.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=chrome-os-partner:28480
TEST=USE=usbpd emerge-samus chromeos-ec
Change-Id: Ic6477861b5a86916f29a9f6bb70ed0def3661886
Reviewed-on: https://chromium-review.googlesource.com/197883
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
These are not currently checked by gerrit, but will be at some point
in the not-too-distant future.
The board/ directory gets additional owners to make it easier for
partner eng to make changes in ToT.
BUG=chrome-os-partner:27404
BRANCH=none
TEST=none (since gerrit doesn't check owners yet)
Change-Id: Ie21b9530fcc6d708ab987d9de80676f91faa72b9
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/191947
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This enforces that "make buildall" runs at least once after the last
file change.
TEST=Try to upload without running "make buildall"
TEST=Change a file without re-running "make buildall", and try to
upload.
BUG=None
BRANCH=None
Change-Id: Ia4abb3c0e17cf4d559975574f398d74c7986c89f
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/185116
Reviewed-by: Dave Parker <dparker@chromium.org>
Vim cannot tell the file type of Makefile.rules by itself. Adding this
tag to save myself from the nightmare of reading the file without syntax
highlighting.
BUG=None
TEST=Open the file with vim and emacs. Both get the correct file type.
BRANCH=None
Change-Id: Ibcc920c0fb7c9575427b29a90b9973ecf3420b3c
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/184791
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Doug Anderson <dianders@chromium.org>
Initial support for the ITE IT8380 chip with the following peripherals :
- 8250-like UART module.
- HW timer (with a 128-us tick period).
- GPIO with pins initialization and edge interrupt support.
other functions are stubbed.
- Clock : basic fixed frequency setup only.
It also add the dev board configuration as a test vehicle.
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=chrome-os-partner:23575
TEST=make BOARD=it8380dev
on IT8380 dev board, use the EC serial console, use gettime from
console.
Change-Id: Id4bf37d1beb21d1a4bee404c9a0bc500025fe787
Reviewed-on: https://chromium-review.googlesource.com/175481
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Alec Berg <alecaberg@chromium.org>
Tested-by: Alec Berg <alecaberg@chromium.org>
By merging make_all.sh to Makefile, parallel make can be made faster.
Previously, if one does 'util/make_all.sh -j32', most of the time is
spent on waiting for linking. Now that we invoke sub-make, linking an
executable doesn't block the next board.
With '-j32', the new 'make buildall' takes about 7 seconds, while the
original 'util/make_all.sh' takes about 27 seconds.
BUG=None
TEST=make buildall -j32
BRANCH=None
Change-Id: I7c2f0d1e928a9b60a8a9070bdcb71b00a3d534cd
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/181091
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Instead of hardcoding the common files for host utils in the generic
rules, let's declare them in the build.mk file using the same system as
the Linux kernel build.
if a binary "foo" declared in "host-util-bin" or "build-util-bin" has a
matching "foo-objs" variable, it will be build from all objects declared
in "foo-objs" else it uses directly "foo.o" (single source file).
This is preparatory to add new "build" tools sharing common sources.
note: the dependencies on the utils are a bit less fine-grained as a
result of this change, but given the low number of tools, that should be
acceptable.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=none
TEST=./util/make_all.sh
Change-Id: Ieffce7ca6f5b685ffb7d1f4626b99aff07b61443
Reviewed-on: https://chromium-review.googlesource.com/176174
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
This adds a 'xrefs' target to create various cross-reference files from the
EC sources. In particular, it generates these files in the target build
directory:
cscope.files - for the cscope browsing tool
TAGS - for emacs
tags - for vi
It parses the dependency files generated by a build, so that only those
source files actually used to create the EC binary are scanned.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=manual
Inside the chroot:
make BOARD=link xrefs
ls -l build/link/cscope.files
If you install the ctags and etags programs in the chroot, you should also
see build/$BOARD/tags or build/$BOARD/TAGS, respectively. If those programs
don't exist, those steps will be silently skipped.
Note: You can install ctags with "sudo emerge ctags". AFAICT, installing
etags requires the entire emacs suite, so it's probably simpler to just copy
the etags binary from your build host into the chroot's /opt/bin/
If you don't have ctags or etags in the chroot, you can still run
make BOARD=link CROSS_COMPILE= xrefs
outside the chroot, provided you've built the EC image first.
Change-Id: I8e16ef19b0f4e79aba887c308e58982fef8fa21f
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/175224
QEMU tests served us well, but it has been more and more difficult to
maintain as we now have more chips and use more functionality from each
EC chip. With emulator tests in place to test common code and hardware
test to test per-chip/per-board drivers, it's time to remove QEMU tests
to simplify our code base.
QEMU tests that are covered by other emulator tests are removed
completely; tests that are not covered are left alone for now to
preserve the test logic.
BUG=chrome-os-partner:18343
TEST=util/make_all.sh
BRANCH=None
Change-Id: I5a4dd2f5ac42f7f66f86fdce0b62dbd2c65bf66a
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174669
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
The common/ subdir was getting cluttered. Move drivers for external
components to a new driver/ tree, and move what used to be called
chipset_*.c to a new power/ directory.
This does not move/rename header files or CONFIG options. That will
be done in subsequent steps, since moving and modifying .c files in
the same CL is harder to review.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=build all boards; pass unit tests
Change-Id: I67a3003dc8564783a320335cf0e9620a21982d5e
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/173601
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Vic Yang <victoryang@chromium.org>
flock leaves the lock file and git complains about it. Let's move the
lock file to /tmp/ec-lcov-lock.
BUG=chrome-os-partner:19235
TEST=make coverage and check .lcov_lock is in /tmp
BRANCH=None
Change-Id: Id6d68af327b53aa1c0c7ae9186149126d8a5cc37
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/62858
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
By 'make coverage', lcov is used to generate test coverage report in
HTML format stored in coverage_rpt folder.
BUG=chrome-os-partner:19235
TEST=Generate a report.
BRANCH=None
Change-Id: I44142eaaeb897cf09179764781120370920144cd
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/58203
This is the first version of pthread-based RTOS emulator. With this, we
will be able to test high-level modules entirely on the host machine.
BUG=chrome-os-partner:19325
TEST='make runtests' and see tests passing.
BRANCH=None
Change-Id: I1f5fcd76aa84bdb46c7d35c5e60ae5d92fd3a319
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49954
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
This puts a copy of test binaries at build/${BOARD}/test-*.bin. This way
it is easier for us to get all test binaries.
BUG=chrome-os-partner:19057
TEST='make tests' and check build/${BOARD}/test-*.bin
BRANCH=None
Change-Id: I8394cea6bee95f00fc01d725d2494ca5e222f47d
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49608
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Some tests are not applicable to all boards. This change makes test-list
a per-board parameter so a test can be enabled/disabled for individual
boards. Also disable all the tests that don't compile now.
BUG=chrome-os-partner:18598
TEST=make tests for all boards
BRANCH=None
Change-Id: Id2d18e23856f5c64dbdc7c6ca5949f8ad61b5cc0
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49452
This creates cscope.files and an emacs TAGS file for the specified BOARD. If
you don't have etags installed, it just creates cscope.files.
BUG=none
BRANCH=none
TEST=manual
make BOARD=link tags
ls
Change-Id: I9b27ba42ac4e85822c5a5a6e8cb5b5148a3435c3
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49356
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This changes current TASK() syntax to TASK_BASE() and TASK_NORMAL(),
where TASK_BASE is necessary for the EC to boot on a board and
TASK_NORMAL represents the task that can be removed in a test binary.
Tasks introduced by a test should be listed as TASK_TEST().
Note that this CL breaks current tests (many of them are broken anyway),
which will be fixed in up coming CLs.
BUG=chrome-os-partner:18598
TEST=Build link/bds/spring/snow/daisy/mccroskey. (mccroskey failed for
unrelated issue)
BRANCH=none
Change-Id: Ic645cdae0906ed21dc473553f1f43c2537ec4bb9
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47531
This copies the parts of sha256.c that we need from vboot_reference,
and removes the explicit dependency on vboot_reference. That
dependency was a good idea when we were doing full verified boot in
the EC, but is now overkill and makes it harder for others to reuse
the EC code. This also lets us call EC functions directly instead of
needing vboot_stub.cc; that reduces code size by ~100 bytes.
BUG=chrome-os-partner:15579
BRANCH=none
TEST=vboot_hash ro, then compare with result of sha256sum build/link/ec.RO.flat
Change-Id: I0f236174291df3e7f3c75e960fe9ab32af305a61
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36589
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Basically re-use the gec lock code from flashrom package.
BUG=chrome-os-partner:12319
TEST=Build and run on link. Only build on snow.
while true; do ectool hello; done & ; run 10 instances.
; expect all instances runs okay.
Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
Change-Id: I11d5824f46810c6f5a04a564a81387cdea081697
Reviewed-on: https://gerrit.chromium.org/gerrit/29763
Reviewed-by: Randall Spangler <rspangler@chromium.org>
When we do parallel 'make', it fails intermittently. We might be hitting
a make bug: http://savannah.gnu.org/bugs/?30653
Let's remove the intermediate file for now and see if this happens
again.
BUG=chrome-os-partner:11614
TEST=Repeatedly remove some file and parallel make. This originally
gave an error once every two time. It doesn't now.
Change-Id: Iaaf48e7d19b11dad30bc70cd50e73c195caf17b4
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/28105
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
All of our current EC configs have RO and a single RW image. Calling
that image 'A' is confusing, particularly when combined with EC
software sync (where the RW image is updated from either the A or B AP
RW firmware). So, rename it.
This changes all the build artifacts and constants. Internal EC
commands and host commands still refer to A/B; that will be fixed in
part 2.
BUG=none
TEST=build link, snow, bds
Change-Id: Icfed4914745f0799bb71befb6a6563cfd8bc90ab
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27649
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
And if RW B isn't enabled, it's not even linked.
BUG=chrome-os-partner:10881
TEST=on link, should be no B image, and 'sysjump B' should fail
On BDS, still should be A and B images
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Change-Id: Icb2af07881cc7e28b9b877f45824486a22fde8d7
Reviewed-on: https://gerrit.chromium.org/gerrit/26116
This produces a host binary running on the application processor and
which is able to re-flash th EC firmware over the AP-to-EC link (either
LPC or I2C).
The payload (ie the EC firmware) to use is embedded inside the flasher
binary.
This is just aimed at testing and developer upgrade. The auto-update
flow is using flashrom.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=None
TEST=build for link/daisy/snow/bds and tests
On Snow, run burn_my_ec from the serial console and see that the EC was
correctly re-flashed.
Change-Id: I7f90e773678a7ef3d8dc6dbacf54e80f3294607b
Reviewed-on: https://gerrit.chromium.org/gerrit/24236
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
*.dis files can always be generated by *.elf files, so we can remove it from
default build targets, and only generate that on demand (make dis).
This also speeds up building time from 6.637s to 4.9s.
BUG=chromium-os:31379
TEST=emerge-link chromeos-ec
make # no *.dis
make dis # get *.dis
Change-Id: Ibc5305501ae72a0733f401863ea1d4c1f17aa34f
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Preparatory work to re-use the tools on ARM boards using I2C
communications.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=None
TEST=make BOARD=link && make BOARD=bds && make BOard=DAISY
Change-Id: I31d41f30c3231a4a9349b939bf6bba871ed4c383
BUG=chrome-os-partner:7459
TEST=manual
In the chroot:
cd src/platform/ec
make BOARD=link
The firmware image (build/link/ec.bin) is signed with dev-keys. Reflash the
EC and try it, and it should verify and reboot into RW A.
Additional tests (setting USE_RO_NORMAL, poking random values into VBLOCK_A
or FW_MAIN_A to force RW B to run, etc.) are left as an exercise for the
reader. I've done them and they work, though.
Change-Id: I29a23ea69aef02a11aebd4af3b043f6864723523
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
This is very basic, so you can only rely on RO_SECTION, RW_SECTION_A, and
RW_SECTION_B for now. We'll fill in more regions as we add vboot stuff.
Still, you should be able to do things like this:
flashrom -p internal:bus=lpc -r ec.bin
flashrom -p internal:bus=lpc -w ec.bin -i RW_SECTION:ec.B.flat
BUG=chrome-os-partner:8198
TEST=manual
Build the image, look for the FMAP in it.
cd src/platform/ec
make BOARD=link
dump_fmap ./build/link/ec.bin
Change-Id: I0adbbfb8e975faae805bda271873fcef46590cf4
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Add build information (date/time/builder) which can be displayed at the
EC console.
Generate a version from the board name and the branch tag.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=chromium-os:27013
TEST=on BDS, run version command on the console.
inspect the built binary.
Change-Id: Idb1f68898ba6b811d02919f17ab4536ed9f8934a
Allow to display the verbose command lines even when building the test
programs.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=None
TEST="make tests" with and without V=1
Change-Id: Ib1195c7e069d7823c2eb7b2311bd5f3c6cd6c835
Preparatory work to introduce a second SoC : 3/5
We split the drivers files which contain SoC specific drivers from the
OS files which only depend the actual CPU core.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=None
TEST=run EC firmware on BDS and test a few commands on the console.
Change-Id: I598f8b23e074da9bd6b0e2ce6689c1075fe854f0
You can now enable/disable tasks more easily.
To conditionally compile a C file depending on the task FOO activation,
just write something like that in the build.mk file :
common-$(CONFIG_TASK_FOO)+=foo_source.o
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=None
TEST=make all BOARD=link && make qemu-tests
Change-Id: I760fb248e1599d13190ccd937a68ef47da17b510
This provides a pty for the EC UART channel on the BD-ICDI-B FTDI
daughtercard for EC debugging.
Signed-off-by: Randall Spangler <rspangler@chromium.org>
BUG=none
TEST=make && build/bds/util/ec_uartd (with EC attached to FTDI board)
Change-Id: I51fe50d0da6345962affb860b923425197a04fa1
Build is the system doing the build (e.g. 64-bit linux) and host is the
target platform on top of the ec (e.g. 32-bit Chromium OS).
Necessary to get ectool properly compiling for Chromium OS.
Signed-off-by: Randall Spangler <rspangler@chromium.org>
BUG=none
TEST=make && file build/bds/util/ectool; ectool should be a 32-bit binary
Change-Id: I50eba4c164ece236646a7c6087b1b86769beeb28
