Commit graph

8 commits

Author SHA1 Message Date
Mike Frysinger
fb5166ce35 Blackfin: add init.elf helper code
This creates a standalone ELF that executes just the Blackfin initcode.
This is useful for people who want to program the low level aspects of
the CPU (memory/clocks/etc...) and can easily be used with JTAG for
quick booting while developing.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-12 02:17:45 -04:00
Mike Frysinger
a972b8d701 gpio: generalize for all generic gpio providers
The Blackfin gpio command isn't terribly Blackfin-specific.  So generalize
the few pieces into two new optional helpers:
	name_to_gpio() - turn a string name into a GPIO #
	gpio_status() - display current pin bindings (think /proc/gpio)

Once these pieces are pulled out, we can relocate the cmd_gpio.c into the
common directory.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-04-13 15:56:51 -04:00
Mike Frysinger
4024242669 Blackfin: drop initcode.o from combined object
We explicitly link in the initcode.o in the Blackfin linker script, so
there is no need to merge it into the main common object for the linker
to pull in itself.  This also fixes duplicate symbol errors with the new
partial linking logic.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-11-19 19:17:57 -05:00
Sebastien Carlier
6d8962e814 Switch from archive libraries to partial linking
Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
2010-11-17 21:02:18 +01:00
Mike Frysinger
c5530555f8 Blackfin: unify custom gpio commands
Now that we have a unified gpio layer, the misc partial gpio commands
can be unified and made complete (support all possible gpios).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-07-05 05:30:07 -04:00
Mike Frysinger
4638b21f2e Blackfin: import gpio/portmux layer from Linux
The current pinmux handling has spread throughout Blackfin drivers and
board code and is getting hideous to maintain.  So import the gpio and
portmux layer from the Blackfin Linux code.  This should spur a serious
of cleanups across the Blackfin tree.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-07-05 05:30:07 -04:00
Mike Frysinger
a5384ae49a Blackfin: implement bootcount support
The default storage location for bootcount is EVT0.  This version uses
one 32bit value and combines the magic/count value in the upper/lower
16bits.  If there is demand for more, should be easy to do.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-07-05 04:18:18 -04:00
Peter Tyser
c6fb83d217 blackfin: Move cpu/blackfin/* to arch/blackfin/cpu/*
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2010-04-13 09:13:25 +02:00
Renamed from cpu/blackfin/Makefile (Browse further)