Merge git://git.denx.de/u-boot-mips

MIPS: Stop building position independent code

U-Boot has up until now built with -fpic for the MIPS architecture,
producing position independent code which uses indirection through a
global offset t

MIPS: Stop building position independent code

U-Boot has up until now built with -fpic for the MIPS architecture,
producing position independent code which uses indirection through a
global offset table, making relocation fairly straightforward as it
simply involves patching up GOT entries.

Using -fpic does however have some downsides. The biggest of these is
that generated code is bloated in various ways. For example, function
calls are indirected through the GOT & the t9 register:

8f998064 lw t9,-32668(gp)
0320f809 jalr t9

Without -fpic the call is simply:

0f803f01 jal be00fc04 <puts>

This is more compact & faster (due to the lack of the load & the
dependency the jump has on its result). It is also easier to read &
debug because the disassembly shows what function is being called,
rather than just an offset from gp which would then have to be looked up
in the ELF to discover the target function.

Another disadvantage of -fpic is that each function begins with a
sequence to calculate the value of the gp register, for example:

3c1c0004 lui gp,0x4
279c3384 addiu gp,gp,13188
0399e021 addu gp,gp,t9

Without using -fpic this sequence no longer appears at the start of each
function, reducing code size considerably.

This patch switches U-Boot from building with -fpic to building with
-fno-pic, in order to gain the benefits described above. The cost of
this is an extra step during the build process to extract relocation
data from the ELF & write it into a new .rel section in a compact
format, plus the added complexity of dealing with multiple types of
relocation rather than the single type that applied to the GOT. The
benefit is smaller, cleaner, more debuggable code. The relocate_code()
function is reimplemented in C to handle the new relocation scheme,
which also makes it easier to read & debug.

Taking maltael_defconfig as an example the size of u-boot.bin built
using the Codescape MIPS 2016.05-06 toolchain (gcc 4.9.2, binutils
2.24.90) shrinks from 254KiB to 224KiB.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: u-boot@lists.denx.de
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Tested-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-mips

MIPS: add support for generating u-boot.elf

Define PLATFORM_ELFFLAGS for MIPS in order to be able to generate u-boot.elf

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

Merge branch 'master' of git://git.denx.de/u-boot

Signed-off-by: Stefano Babic <sbabic@denx.de>

Merge branch 'master' of git://git.denx.de/u-boot-mips

MIPS: provide a default u-boot-spl.lds

Provide a default linker script for SPL binaries. Start address
and size of text section and BSS section are configurable. All
sections are arranged in a way t

MIPS: provide a default u-boot-spl.lds

Provide a default linker script for SPL binaries. Start address
and size of text section and BSS section are configurable. All
sections are arranged in a way that only relevant sections are
kept in the code section for maximum size reduction. All other
sections are kept but moved outside the code section to help
with debugging.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-mips

MIPS: Kconfig: optimize gcc -march and -mtune setup

Move setup of -march to arch/mips/Makefile and follow the design on ARM.
Also add a possibility to chose specific CPU tune options.

Signed-off-by

MIPS: Kconfig: optimize gcc -march and -mtune setup

Move setup of -march to arch/mips/Makefile and follow the design on ARM.
Also add a possibility to chose specific CPU tune options.

Signed-off-by: Wills Wang <wills.wang@live.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

MIPS: add initial infrastructure for device-tree files

Prepare sub-folder for device-tree files. Make support for
device-tree on MIPS available in Kbuild/Kconfig.

Signed-off-by: Daniel Schwierzeck

MIPS: add initial infrastructure for device-tree files

Prepare sub-folder for device-tree files. Make support for
device-tree on MIPS available in Kbuild/Kconfig.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>

show more ...

MIPS: do not build position-independent executables for SPL

SPL binaries are usually linked to a fixed address in SRAM.
Furthermore SPL binaries do not need to relocate itself. Thus
do not build the

MIPS: do not build position-independent executables for SPL

SPL binaries are usually linked to a fixed address in SRAM.
Furthermore SPL binaries do not need to relocate itself. Thus
do not build them as position-independent binaries which helps
to largely reduce the size of SPL binaries.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

Merge branch 'u-boot/master'

generic-board: move __HAVE_ARCH_GENERIC_BOARD to Kconfig

Move the option to Kconfig renaming it to CONFIG_HAVE_GENERIC_BOARD.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed

generic-board: move __HAVE_ARCH_GENERIC_BOARD to Kconfig

Move the option to Kconfig renaming it to CONFIG_HAVE_GENERIC_BOARD.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-mips

MIPS: add .padding section to linker script

Commit 79fd7e649e287228a1445820a72f7dd33baedb96

MIPS: always keep all sections in u-boot ELF binary.

Always keep all sections in u-boot ELF bina

MIPS: add .padding section to linker script

Commit 79fd7e649e287228a1445820a72f7dd33baedb96

MIPS: always keep all sections in u-boot ELF binary.

Always keep all sections in u-boot ELF binary. Move all unneeded
sections after _end to avoid allocating space in the final binary.
Also remove .deadcode section which is now obsolete.

removed section .deadcode because the original symptoms were not
visible anymore. Unfortuneatly the binutils bug still exists.

The size of .rel.dyn section is often bigger than needed for all
entries. But objcopy only allocates space as much as required for all
reloc entries. Thus there is a gap between the last entry and
__rel_dyn_end in u-boot.bin. If u-boot is booted from RAM (e.g. in
SPL scenarios) that area could contain garbage data which could lead
to CPU exceptions during relocation.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

MIPS: refactor setting of compiler options

Refactor and unify all compiler settings in arch/mips/config.mk.
Also add tune flags for each supported CPU type.

Signed-off-by: Daniel Schwierzeck <danie

MIPS: refactor setting of compiler options

Refactor and unify all compiler settings in arch/mips/config.mk.
Also add tune flags for each supported CPU type.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arm

Conflicts:
boards.cfg

Signed-off-by: Stefano Babic <sbabic@denx.de>

kconfig: delete redundant CONFIG_${ARCH} definition

CONFIG_${ARCH} is defined by Kconfig.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Merge branch 'master' of git://git.denx.de/u-boot-arm

Merge branch 'u-boot/master'

Conflicts:
drivers/net/Makefile

(trivial merge)

Merge branch 'master' of git://git.denx.de/u-boot-mips

MIPS: allow use of generic board

This patch allows MIPS boards to make use of generic board, replacing
arch/mips/lib/board.c with common/board_{f,r}.c and struct bd_info with
the asm-generic version

MIPS: allow use of generic board

This patch allows MIPS boards to make use of generic board, replacing
arch/mips/lib/board.c with common/board_{f,r}.c and struct bd_info with
the asm-generic version.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

show more ...

MIPS: always keep all sections in u-boot ELF binary.

Always keep all sections in u-boot ELF binary. Move all unneeded
sections after _end to avoid allocating space in the final binary.
Also remove .

MIPS: always keep all sections in u-boot ELF binary.

Always keep all sections in u-boot ELF binary. Move all unneeded
sections after _end to avoid allocating space in the final binary.
Also remove .deadcode section which is now obsolete.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arm into master

Conflicts:
arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg
arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg

Signed-off-by: Stefano Babic

Merge branch 'master' of git://git.denx.de/u-boot-arm into master

Conflicts:
arch/arm/cpu/arm926ejs/mxs/mxsimage.mx23.cfg
arch/arm/cpu/arm926ejs/mxs/mxsimage.mx28.cfg

Signed-off-by: Stefano Babic <sbabic@denx.de>

show more ...

Merge branch 'master' of git://git.denx.de/u-boot-arm