All architectures but MIPS are using --gc-sections on final linking.
This patch introduces that feature for MIPS to reduce the memory and
flash footprint.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Thomas Lange <thomas@corelatus.se>
Cc: Vlad Lungu <vlad.lungu@windriver.com>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

Rename STANDALONE_LOAD_ADDR into CONFIG_STANDALONE_LOAD_ADDR
and allow that the architecture-specific default value gets
overwritten by defining the value in the board header file.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Cc: Tsi Chung Liew <tsi-chung.liew@freescale.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

Commit 44c6e659 "rename _end to __bss_end__ broke building of a large
number of systems (at least all PowerPC?):

libstubs.o: In function `app_startup':
examples/standalone/stubs.c:197: undefined reference to `__bss_end__'

The rename should not be done for the files in the
examples/standalone/ directory, as these are not using the code from
start.S, but do their own BSS clearing, and either use their own
linker scripts or the ones provided by the compilers.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>

Currently, _end is used for end of BSS section.  We want _end to mean
end of u-boot image, so we rename _end to __bss_end__ first.

Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com>

One more place that was missed during the do_reset() unification.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

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>

Using -fno-toplevel-reorder causes gcc to not reorder functions.  This
ensures that an application's entry point will be the first function in
the application's source file.

This change, along with commit 620bbba5
should cause a standalone application's entry point to be at the base of
the compiled binary.  Previously, the entry point could change depending
on gcc version and flags.

Note -fno-toplevel-reorder is only available in gcc version 4.2 or
greater.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

From the document, if set all arguments in "OUTPUT_FORMAT" to
"tradbigmips", then even add "-EL" to gcc we still get EB format.

pb1x00 is only used in Little-endian, so its default endian should be
set to LE.

Signed-off-by: Xiangfu Liu <xiangfu@openmobilefree.net>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>

The smc911x_detect function in /net/driver/net/smc911x.c
returns a 0 if everything was ok (a chip was found) and -1 else.
In the standalone example 'smc911x_eeprom' the return value
of smc911x_detect is interpreted in a different way
(0 for error, !0 as OK).
This leads to the error that the chip will not be detected.

Signed-off-by: Juergen Kilb <j.kilb@phytec.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>

Change the return type of the *printf() functions to the standard
"int"; no changes are needed but returning the already available
length count.

This will save a few additional strlen() calls later...

Signed-off-by: Wolfgang Denk <wd@denx.de>

Previously, standalone applications were compiled with gcc flags that
produced relocatable executables on the PowerPC architecture (eg with
the -mrelocatable and -fPIC flags).  There's no reason for these
applications to be fully relocatable at this time since no relocation
fixups are performed on standalone applications.

Additionally, removing the gcc relocation flags results in the entry
point of applications residing at the base of the image.  When
a standalone application was relocatable, the entry point was generally
located at an offset into the image which was confusing and prone to
errors.

This change moves the entry point of PowerPC standalone applications
from 0x40004 (usually) to 0x40000.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>

The nios-32 arch is obsolete and broken. So it is removed.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>

The "-ffixed-r15" option doesn't work well for gcc4. Since we
don't use gp for small data with option "-G0", we can use gp
as global data pointer. This allows compiler to use r15. It
is necessary for gcc4 to work properly.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

Now that the other architecture-specific lib directories have been
moved out of the top-level directory there's not much reason to have the
'_generic' suffix on the common lib directory.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk

This change is intended to clean up the top-level directory structure
and more closely mimic Linux's directory organization.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

Building examples/standalone/eepro100_eeprom triggers this error:

In file included from include/common.h:629,
                 from eepro100_eeprom.c:24:
include/net.h: In function 'NetReadIP':
include/net.h:430: warning: implicit declaration of function 'memcpy'
eepro100_eeprom.c: At top level:
eepro100_eeprom.c:81: error: conflicting types for 'memcpy'
include/net.h:430: error: previous implicit declaration of 'memcpy' was here

Fix this.

Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Wolfgang Denk <wd@denx.de>

Building for a bf533-stamp ends up with this error:
smc91111_eeprom.o: In function `smc91111_eeprom':
examples/standalone/smc91111_eeprom.c:58: undefined reference to `memset'
make[2]: *** [smc91111_eeprom] Error 1

The new eth_struct definition means gcc has to zero out the structure on
the stack, and some gcc versions optimize this with an implicit call to
memset.  So tweak the structure style to avoid that gcc feature.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

Commit 6a45e384 (Make getenv_IPaddr() global)
inadvertently added ' #include "net.h" ' to the standalone programs, creating
duplicate definitions of 'struct eth_device'.  This patch removes the local
definitions and removes other code that breaks due to the change in definition.

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>

According to the PPC reference implementation the udelay() function is
responsible for resetting the watchdog timer as frequently as needed.
Most other architectures do not meet that requirement, so long-running
operations might result in a watchdog reset.

This patch adds a generic udelay() function which takes care of
resetting the watchdog before calling an architecture-specific
__udelay().

Signed-off-by: Ingo van Lil <inguin@gmx.de>

Since the Makefile now controls the compilation of this, there is no need
for CONFIG checking nor the stub function.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Some versions of 'make' do not handle trailing white-spaces
properly. Trailing spaces in ELF causes a 'fake' source to
be added to the variable COBJS; leading to build failure
(listed below). The problem was found with GNU Make 3.80.

Using text-function 'strip' as a workaround for the problem.

make[1]: Entering directory `/home/sanjeev/u-boot/examples/standalone'
arm-none-linux-gnueabi-gcc -g  -Os   -fno-common -ffixed-r8 -msoft-float
-D__KERNEL__ -DTEXT_BASE=0x80e80000 -I/home/sanjeev/u-boot/include
-fno-builtin -ffreestanding -nostdinc -isystem /opt/codesourcery/2009q1-
203/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/include -pipe  -DCONFIG_
ARM -D__ARM__ -marm  -mabi=aapcs-linux -mno-thumb-interwork -march=armv5
-Wall -Wstrict-prototypes -fno-stack-protector -g  -Os   -fno-common -ff
ixed-r8 -msoft-float   -D__KERNEL__ -DTEXT_BASE=0x80e80000 -I/home/sanje
ev/u-boot/include -fno-builtin -ffreestanding -nostdinc -isystem /opt/co
desourcery/2009q1-203/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/includ
e -pipe  -DCONFIG_ARM -D__ARM__ -marm  -mabi=aapcs-linux -mno-thumb-inte
rwork -march=armv5 -I.. -Bstatic -T u-boot.lds  -Ttext 0x80e80000 -o .c
arm-none-linux-gnueabi-gcc: no input files
make[1]: *** [.c] Error 1
make[1]: Leaving directory `/home/sanjeev/u-boot/examples/standalone'
make: *** [examples/standalone] Error 2
premi #

Signed-off-by: Sanjeev Premi <premi@ti.com>

Fixed typo (s/ElF/ELF/).
Signed-off-by: Wolfgang Denk <wd@denx.de>

	the standalone examples.

Signed-off-by: Scott McNutt <smcnutt@psyent.com>

When the smc911x driver was converted to NET_MULTI, the smc911x eeprom was
missed.  The config option needed updating as well as overhauling of the
rergister read/write functions.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

Signed-off-by: Sergey Mironov <ierton@gmail.com>
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

All in-tree boards that use this controller have CONFIG_NET_MULTI
added
Also:
  - changed CONFIG_DRIVER_SMC91111 to CONFIG_SMC91111
  - cleaned up line lengths
  - modified all boards that override weak function in this driver
  - modified all eeprom standalone apps to work with new driver
  - updated blackfin standalone EEPROM app after testing

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Clean up the arch/cpu/board/config checks as well as redundant setting of
srec/bin variables by using the kbuild VAR-$(...) style.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Rather than maintain/extend the current ifeq($(ARCH)) mess that exists in
the standalone Makefile, push the setting up of LOAD_ADDR out to the arch
config.mk (and rename to STANDALONE_LOAD_ADDR in the process).  This keeps
the common code clean and lets the arch do whatever crazy crap it wants in
its own area.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Atmel DataFlashes by default operate with pages that are slightly bigger
than normal binary sizes (i.e. many are 1056 byte pages rather than 1024
bytes).  However, they also have a "power of 2" mode where the pages show
up with the normal binary size.  The latter mode is required in order to
boot with a Blackfin processor, so many people wish to convert their
DataFlashes on their development systems to this mode.  This standalone
application does just that.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Since the Blackfin ABI favors higher scratch registers by default, use the
last scratch register (P3) for global data rather than the first (P5).
This allows the compiler's register allocator to use higher number scratch
P registers, which in turn better matches the Blackfin instruction set,
which reduces the size of U-Boot by more than 1024 bytes...

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Clean up the arch/cpu/board/config checks as well as redundant setting of
srec/bin variables by using the kbuild VAR-$(...) style.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Rather than maintain/extend the current ifeq($(ARCH)) mess that exists in
the standalone Makefile, push the setting up of LOAD_ADDR out to the arch
config.mk (and rename to STANDALONE_LOAD_ADDR in the process).  This keeps
the common code clean and lets the arch do whatever crazy crap it wants in
its own area.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Atmel DataFlashes by default operate with pages that are slightly bigger
than normal binary sizes (i.e. many are 1056 byte pages rather than 1024
bytes).  However, they also have a "power of 2" mode where the pages show
up with the normal binary size.  The latter mode is required in order to
boot with a Blackfin processor, so many people wish to convert their
DataFlashes on their development systems to this mode.  This standalone
application does just that.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

Since the Blackfin ABI favors higher scratch registers by default, use the
last scratch register (P3) for global data rather than the first (P5).
This allows the compiler's register allocator to use higher number scratch
P registers, which in turn better matches the Blackfin instruction set,
which reduces the size of U-Boot by more than 1024 bytes...

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

The attached patch corrects an error in the examples/Makefile which
causes the applications in the examples directory to hang on OMAP3
based boards. The current Makefile sets -Ttext during linking to
0x0c100000 which is outside of addressable SDRAM memory. The script
corrects the existing ifeq...else...endif logic to look at the VENDOR
tag rather than the CPU tag.

The patch affects the following configs: omap3_beagle_config,
omap3_overo_config, omap3_evm_config, omap3_pandora_config,
omap3_zoom1_config and omap3_zoom2_config.

Signed-off-by: Michael Evans <horse_dung@hotmail.com>

Edited commit message.
Signed-off-by: Wolfgang Denk <wd@denx.de>

Signed-off-by: Wolfgang Denk <wd@denx.de>