For some time there have been repeated reports about build problems
with some ARM (cross) tool chains. Especially issues about
(in)compatibility with the tool chain provided runtime support
library libgcc.a caused to add and support a private implementation
of such runtime support code in U-Boot. A closer look at the code
indicated that some of these issues are actually home-made. This
patch attempts to clean up some of the most obvious problems and make
building of U-Boot with different tool chains easier:
- Even though all ARM systems basicy used the same compiler options
to select a specific ABI from the tool chain, the code for this was
distributed over all cpu/*/config.mk files. We move this one level
up into lib_arm/config.mk instead.
- So far, we only checked if "-mapcs-32" was supported by the tool
chain; if yes, this was used, if not, "-mabi=apcs-gnu" was
selected, no matter if the tool chain actually understood this
option. There was no support for EABI conformant tool chains.
This patch implements the following logic:
1) If the tool chain supports
"-mabi=aapcs-linux -mno-thumb-interwork"
we use these options (EABI conformant tool chain).
2) Otherwise, we check first if
"-mapcs-32"
is supported, and then check for
"-mabi=apcs-gnu"
If one test succeeds, we use the first found option.
3) In case 2), we also test if "-mno-thumb-interwork", and use
this if the test succeeds. [For "-mabi=aapcs-linux" we set
"-mno-thumb-interwork" mandatorily.]
This way we use a similar logic for the compile options as the
Linux kernel does.
- Some EABI conformant tool chains cause external references to
utility functions like raise(); such functions are provided in the
new file lib_arm/eabi_compat.c
Note that lib_arm/config.mk gets parsed several times, so we must
make sure to add eabi_compat.o only once to the linker list.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Dirk Behme <dirk.behme@googlemail.com>
Cc: Magnus Lilja <lilja.magnus@gmail.com>
Cc: Tom Rix <Tom.Rix@windriver.com>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Sergey Kubushyn <ksi@koi8.net>
Tested-by: Magnus Lilja <lilja.magnus@gmail.com>
Tested-by: Andrzej Wolski <awolski@poczta.fm>
Tested-by: Gaye Abdoulaye Walsimou <walsimou@walsimou.com>
Tested-by: Tom Rix <Tom.Rix@windriver.com>
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
all arm init the IRQ stack the same way
so unify it in lib_arm/interrupts.c and then call arch specific interrupt init
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
all arm boards except a few use the same cpu linker script
so move it to cpu/$(CPU)
that could be overwrite in following order
SOC
BOARD
via the corresponding config.mk
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
actually the timer init use the interrupt_init as init callback
which make the interrupt and timer implementation difficult to follow
so now rename it as int timer_init(void) and use interrupt_init for interrupt
btw also remane the corresponding file to the functionnality implemented
as ixp arch implement two timer - one based on interrupt - so all the timer
related code is moved to timer.c
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This warning is issued by modern ARM-EABI GCC on non-thumb targets.
Signed-off-by: Vladimir Panfilov <pvr@emcraft.com>
Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).
Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Modifications are based on the linux kernel approach and
support two use cases:
1) Add O= to the make command line
'make O=/tmp/build all'
2) Set environement variable BUILD_DIR to point to the desired location
'export BUILD_DIR=/tmp/build'
'make'
The second approach can also be used with a MAKEALL script
'export BUILD_DIR=/tmp/build'
'./MAKEALL'
Command line 'O=' setting overrides BUILD_DIR environent variable.
When none of the above methods is used the local build is performed and
the object files are placed in the source directory.
Correct addessing errors in platform files.
Split off common core module data from Integrator header files to
include/armcoremodule.h.
Patch by Peter Pearse, 04 Oct 2005
- remove all references to CONFIG_INIT_CRITICAL for ARM based boards
- introduce two new configuration options instead:
CONFIG_SKIP_LOWLEVEL_INIT and CONFIG_SKIP_RELOCATE_UBOOT
Reset monitor size back to 256 so environment can be written
to flash on MPC85xx ADS and CDS releases.
* Patch by Paolo Broggini, 02 Sep 2004:
Make BSS clearing on ARM systems more robust
* Patch by Yue Hu and Joe, 01 Sep 2004:
- add PCI support for ixp425;
- add EEPRO100 suppor tfor ixdp425 board.
* Fix problem with protected sector detection in driver/cfi_flash.c
* Patch by Sascha Hauer, 28 Jun:
- add generic support for Motorola i.MX architecture
- add support for mx1ads, mx1fs2 and scb9328 boards
* Patches by Marc Leeman, 23 Jul 2004:
- Add define for the PCI/Memory Buffer Configuration Register
- corrected comments in cpu/mpc824x/cpu_init.c
* Add support for multiple serial interfaces
(for example to allow modem dial-in / dial-out)
- update mach-types.h to latest arm.linux.org.uk master list
- Set correct OMAP1610 bi_arch_number for build target
* Patch by Curt Brune, 06 Jul 2004:
evb4510: add support for timer interrupt; cleanup
Add support for NET+50 CPU and ModNET50 board
* Patch by Sam Song, 10 Feb 2004:
Fix typos in cfi_flash.c
* Patch by Leon Kukovec, 10 Feb 2004
Fixed long dir entry slot id calculation in get_vfatname
* Patch by Robin Gilks, 10 Feb 2004:
add "itest" command (operators: -eq, -ne, -lt, -gt, -le, -ge, ==,
!=, <>, <, >, <=, >=)
ARM memory layout fixes: the abort-stack is now set up in the
correct RAM area, and the BSS is zeroed out as it should be.
Furthermore, the magic variables 'armboot_end' and 'armboot_end_data'
of the linker scripts are replaced by '__bss_start' and '_end',
resp., which is a further step to eliminate unnecessary differences
between the implementation of the CPU architectures.
Move most of the timer interrupt related PPC code to ppc_lib/interrupts.c
* Patch by Anders Larsen, 17 Sep 2003:
Bring ARM memory layout in sync with the documentation:
stack and malloc-heap are now located _below_ the U-Boot code
