Latest revision as of 01:10, 30 January 2016

Chrome EC

The Chrome EC is used in almost all Chrome OS devices, and an increasing number of accessories, like Google's Type C chargers. It is based on the Chromium EC code base.

Building the Chrome EC

Building in the ChromiumOS environment

Getting started building EC images quickly

Building outside of the ChromiumOS chroot

Build requirements

You will need:

GNU Make 4.1 (older versions are having trouble with the Makefiles)
an ARM cross compiler (I used coreboot's armv7-a-eabi- toolchain)

Patches required

Patching up the code:

https://chromium-review.googlesource.com/#/c/322435/

Build instructions

Let's go:

$ sudo aptitude install libftdi-dev
$ git clone https://chromium.googlesource.com/chromiumos/platform/vboot_reference
$ cd vboot_reference
$ make
[..]
$ cp build/futility/futility ~/bin
$ cd ..
$ git clone https://chromium.googlesource.com/chromiumos/platform/ec
[..]
$ cd ec
$ CROSS_COMPILE=armv7-a-eabi- HOST_CROSS_COMPILE= make BOARD=chell
[..]
$

Build all boards:

ls -1 board/ | grep -v OWNERS | grep -v host | \
while read n; do
  echo "**************** $n"
  CROSS_COMPILE=armv7-a-eabi- HOST_CROSS_COMPILE= make BOARD=$n -j
done

Issues

Targets not building

cr50 (make issue with -C)
glados,kunimitsu,wheatley: `memset' referenced in section `.text' of /tmp/cc3Dv6dh.ltrans2.ltrans.o: defined in discarded section `.text' of build/wheatley/RO/common/util.o (symbol from plugin)
it8380dev: armv7-a-eabi-gcc: error: unrecognized argument in option '-march=v3m'
Not real targets, but in board/: host, OWNERS

@@ Line 10: / Line 10: @@
 == Building outside of the ChromiumOS chroot ==
+=== Build requirements ===
 You will need:
 * GNU Make 4.1 (older versions are having trouble with the Makefiles)
 * an ARM cross compiler (I used coreboot's armv7-a-eabi- toolchain)
+=== Patches required ===
 Patching up the code:
- diff --git a/Makefile.toolchain b/Makefile.toolchain
+* https://chromium-review.googlesource.com/#/c/322435/
- index f015726..759dfb0 100644
- --- a/Makefile.toolchain
- +++ b/Makefile.toolchain
- @@ -48,6 +48,9 @@ CFLAGS=$(CPPFLAGS) $(CFLAGS_CPU) $(CFLAGS_DEBUG) $(CFLAGS_WARN) $(CFLAGS_y)
-  CFLAGS+= -ffunction-sections -fshort-wchar
-  CFLAGS+= -fno-delete-null-pointer-checks -fconserve-stack
- +CFLAGS+= -ffreestanding
- +CPPFLAGS+= -ffreestanding
- +
-  FTDIVERSION=$(shell $(PKG_CONFIG) --modversion libftdi1 2>/dev/null)
-  ifneq ($(FTDIVERSION),)
-    LIBFTDI_NAME=ftdi1
-and
- diff --git a/include/timer.h b/include/timer.h
+=== Build instructions ===
- index 5f92207..1a43604 100644
- --- a/include/timer.h
- +++ b/include/timer.h
- @@ -8,7 +8,7 @@
-  #ifndef __CROS_EC_TIMER_H
-  #define __CROS_EC_TIMER_H
- -#include <sys/types.h>
- +typedef long clock_t;
-  #include "common.h"
-  #include "task_id.h"
 Let's go:
@@ Line 63: / Line 40: @@
   [..]
   $
+Build all boards:
+ ls -1 board/ | grep -v OWNERS | grep -v host | \
+ while read n; do
+   echo "**************** $n"
+   CROSS_COMPILE=armv7-a-eabi- HOST_CROSS_COMPILE= make BOARD=$n -j
+ done
+=== Issues ===
+Targets not building
+* cr50 (make issue with -C)
+* glados,kunimitsu,wheatley: `memset' referenced in section `.text' of /tmp/cc3Dv6dh.ltrans2.ltrans.o: defined in discarded section `.text' of build/wheatley/RO/common/util.o (symbol from plugin)
+* it8380dev: armv7-a-eabi-gcc: error: unrecognized argument in option '-march=v3m'
+* Not real targets, but in board/: host, OWNERS

Chrome EC: Difference between revisions