Commit graph

80 commits

Author SHA1 Message Date
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Cédric Schieli
3e10fcde3f arm: add save_boot_params for ARM1176
Implement a hook to allow boards to save boot-time CPU state for later
use. When U-Boot is chain-loaded by another bootloader, CPU registers may
contain useful information such as system configuration information. This
feature mirrors the equivalent ARMv7 feature.

Signed-off-by: Cédric Schieli <cschieli@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
2016-11-21 14:07:31 -05:00
Yuichiro Goto
ba10b852fe ARM: start.S: fix typo
Fix typo in comment about position of 'A' bit in several start.S.

Signed-off-by: Yuichiro Goto <goto.yuichiro@espark.co.jp>
2016-02-29 14:49:35 -05:00
Alexander Stein
2085ae74de arm1136/arm1176: Merge cache handling code
As both cores are similar merge the cache handling code for both CPUs
to arm11 directory.

Signed-off-by: Alexander Stein <alexanders83@web.de>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
[trini: Add hunk to arch/arm/cpu/arm1136/Makefile]
Signed-off-by: Tom Rini <trini@konsulko.com>
2015-08-12 20:47:41 -04:00
Albert ARIBAUD
b491d9757d Merge branch 'u-boot/master' 2015-04-10 14:22:23 +02:00
Masahiro Yamada
ddf6bd4876 ARM: bcm283x: merge BCM2835/BCM2836 directories into mach-bcm283x
BCM2835 (used on Raspberry Pi) and BCM2836 (used on Raspberry Pi 2)
are similar enough.  One of the biggest differences is the ARM
processor.  It is reasonable to collect the source files into a
single place, arch/arm/mach-bcm283x/.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
2015-03-28 09:03:09 -04:00
Masahiro Yamada
79d75d7527 ARM: move -march=* and -mtune= options to arch/arm/Makefile
My main motivations for this commit are:

[1] Follow the arch/arm/Makefile style of Linux Kernel

[2] Maintain compiler options systematically
  Currently, we give -march=* and -mtune=* options inconsistently:
  Only some of the CPUs pass -march=* and -mtune=* options.
  By collecting such options into the single place arch/arm/Makefile
  we can tell which options are missing at a glance.

[3] Prepare for deprecating arch/*/cpu/*/config.mk

Note:
  This commit just moves the compiler options so as not to change
  the behavior at all.  It does not care about the correctness of
  the given options.  Fox example, "-march=armv5te" might be better
  than "-march=armv4" for ARM946EJS, but it is beyond the scope this
  commit.  Also, filling the missing -march=* and -tune=* is left
  to follow-up patches.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
2015-03-27 16:55:22 +01:00
Rob Herring
7682a99826 remove unnecessary version.h includes
Various files are needlessly rebuilt every time due to the version and
build time changing. As version.h is not actually needed, remove the
include.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Macpaul Lin <macpaul@andestech.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: York Sun <yorksun@freescale.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Philippe Reynes <tremyfr@yahoo.fr>
Cc: Eric Jarrige <eric.jarrige@armadeus.org>
Cc: "David Müller" <d.mueller@elsoft.ch>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Robert Baldyga <r.baldyga@samsung.com>
Cc: Torsten Koschorrek <koschorrek@synertronixx.de>
Cc: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Łukasz Majewski <l.majewski@samsung.com>
2015-03-24 10:50:50 -04:00
Masahiro Yamada
50b82c4b70 ARM: remove tnetv107x board support
This is still a non-generic board.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Chan-Taek Park <c-park@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
2015-02-24 17:07:24 -05:00
Masahiro Yamada
d648964fc2 kconfig: remove unneeded dependency on !SPL_BUILD
Now CONFIG_SPL_BUILD is not defined in Kconfig, so
"!depends on SPL_BUILD" and "if !SPL_BUILD" are redundant.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2015-02-24 17:06:27 -05:00
Stephen Warren
4641429695 rpi: add support for Raspberry Pi 2 model B
USB doesn't seem to work yet; the controller detects the on-board Hub/
Ethernet device but can't read the descriptors from it. I haven't
investigated yet.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2015-02-21 08:28:16 -05:00
Stephen Warren
a033171b2e bcm2835/rpi: add SPDX license tags for some files
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2015-02-21 08:27:08 -05:00
Simon Glass
34e609ca82 dm: Move Raspberry Pi driver model CONFIGs to Kconfig
Remove driver model CONFIGs from the board config header and use Kconfig
instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-02-12 10:35:34 -07:00
Masahiro Yamada
56f31e872e kbuild: use SoC-specific CONFIG to descend into SoC directory
Use "obj-$(CONFIG_FOO) += foo/" where it is possible.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-23 06:49:02 -05:00
Masahiro Yamada
165ecd26f0 kbuild: Descend into SOC directory from CPU directory
Some CPUs of some architectures have SOC directories.
At present, the build system directly descends into SOC directories
from the top Makefile, but it should generally descend into each
directory from its parent directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-23 06:49:02 -05:00
Masahiro Yamada
b41411954d linux/kernel.h: sync min, max, min3, max3 macros with Linux
U-Boot has never cared about the type when we get max/min of two
values, but Linux Kernel does.  This commit gets min, max, min3, max3
macros synced with the kernel introducing type checks.

Many of references of those macros must be fixed to suppress warnings.
We have two options:
 - Use min, max, min3, max3 only when the arguments have the same type
   (or add casts to the arguments)
 - Use min_t/max_t instead with the appropriate type for the first
   argument

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Pavel Machek <pavel@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
[trini: Fixup arch/blackfin/lib/string.c]
Signed-off-by: Tom Rini <trini@ti.com>
2014-11-23 06:48:30 -05:00
Masahiro Yamada
c79cba37b3 cosmetic: replace MIN, MAX with min, max
The macro MIN, MAX is defined as the aliase of min, max,
respectively.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-24 18:30:29 -04:00
Albert ARIBAUD
41623c91b0 arm: move exception handling out of start.S files
Exception handling is basically identical for all ARM targets.
Factorize it out of the various start.S files and into a
single vectors.S file, and adjust linker scripts accordingly.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2014-05-15 16:24:53 +02:00
Albert ARIBAUD
60a4f39fcd arm: remove unused _end_vect and _vectors_end symbols
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2014-05-15 16:24:47 +02:00
Albert ARIBAUD
b60eff31f3 arm: remove unneeded symbol offsets and _TEXT_BASE
Remove the last uses of symbol offsets in ARM U-Boot.
Remove some needless uses of _TEXT_BASE.
Remove all _TEXT_BASE definitions.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2014-02-26 21:18:12 +01:00
Stephen Warren
3cd534e455 ARM: bcm2835: config.mk isn't needed
The entries in config.mk were needed so that U-Boot could be built
with an old version of the Raspberry Pi Foundation's toolchain. Without
them, the build would error out with:

...-ld: error: .../libgcc.a(_bswapsi2.o) uses VFP register arguments,
u-boot does not

However, none of the 3 toolchains in the latest version of their
tools.git, nor the Ubuntu/Linaro ARM compilers in at least Ubuntu Quantal
or Saucy, need these options set in order to compile a working U-Boot.
Hence, remove the options for simplicity.

Reported-by: Tom Rini <trini@ti.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
2014-02-13 15:06:02 +01:00
Masahiro Yamada
bf1af3d872 ARM: merge commonly-defined PLATFORM_RELFLAGS
Before this commit, all arch/arm/cpu/${CPU}/config.mk except ARMv8
had the same option:
$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))

This commit moves it into arch/arm/config.mk.

If the compiler does not support the option,
it is ignored by $(call cc-option,...).
So this commit gives no harm to ARMv8.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-01-24 16:59:08 -05:00
Darwin Rambo
de351d6be6 lib: time: add weak timer_init() function
If timer_init() is made a weak stub function, then it allows us to
remove several empty timer_init functions for those boards that
already have a timer initialized when u-boot starts. Architectures
that use the timer framework may also remove the need for timer.c.

Signed-off-by: Darwin Rambo <drambo@broadcom.com>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
2014-01-24 16:59:06 -05:00
Stephen Warren
004c10598b ARM: bcm2835: fix mailbox timeout
My original intention was to have a 100ms timeout. However, the timer
operations used return values in ms not us, so we ended up with a 100s
timeout instead. Fixing this exposes that some operations need longer
to operate than 100ms, so bump the timeout up to a whole second.

Reported-by: Andre Heider <a.heider@gmail.com>
Reviewed-by: Andre Heider <a.heider@gmail.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2014-01-20 17:11:39 -05:00
Masahiro Yamada
fa8f95084d ARM: convert makefiles to Kbuild style
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2013-10-31 12:53:39 -04:00
Masahiro Yamada
3102274d8b ARM: refactor compiler options in config.mk
Every ARM cpu config.mk (arch/arm/cpu/{CPUDIR}/config.mk) defines:

PLATFORM_RELFLAGS += -fno-common -ffixed-r8 -msoft-float

So, this patch moves the common compiler options to arch/arm/config.mk.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2013-09-23 17:03:05 +02:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Albert ARIBAUD
3da0e5750b arm: factorize relocate_code routine
Replace all relocate_code routines from ARM start.S files
with a single instance in file arch/arm/lib/relocate.S.
For PXA, this requires moving the dcache unlocking code
from within relocate_code into c_runtime_cpu_setup.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Tested-by: Simon Glass <sjg@chromium.org>
2013-05-30 20:24:38 +02:00
Albert ARIBAUD
fa6c7413d1 arm: do not compile relocate_code() for SPL builds
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Tested-by: Simon Glass <sjg@chromium.org>
2013-05-30 20:24:07 +02:00
Tetsuyuki Kobayashi
4411b2aea7 BUGFIX: arm: data abort in get_bad_stack_swi
When swi instruction is executed, it is expected to get message
"software interrupt" in console and dump registers and reboot, as
do_software_interrupt() in arch/arm/lib/interrupts.c.
But, actually it causes data abort accessing wrong address in get_bad_stack_swi
macro in arch/arm/cpu/v7/start.S.
This patch fixes this problem.

The same mistake in arch/arm/cpu/{arm1136,arm1176,pxa}/start.S.

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
2013-04-13 11:12:46 +02:00
Benoît Thébaudeau
9ce8e2386c arm1176: Remove unused MMU setup from start.S
Following the removal of the smdk6400 board, the MMU setup code in
arm1176/start.S becomes unused, so remove it. It will still be possible to
restore it later from the Git history if necessary, in which case it should be
moved out of the relocate_code() function.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:09 +02:00
Benoît Thébaudeau
66f30bf983 arm: Remove deprecated and now unused NAND SPL
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:08 +02:00
Benoît Thébaudeau
e53232250b arm: Remove support for unused s3c64xx
Following the removal of the smdk6400 board, the s3c64xx SoC becomes unused, so
remove associated code. It will still be possible to restore it later from the
Git history if necessary.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:08 +02:00
Benoît Thébaudeau
5c6db120fc arm: Remove unused relocate_code() parameters
Commit e05e5de7fa made the 2 1st parameters of
ARM's relocate_code() useless since it moved the code handling them to crt0.S.
So, drop these parameters.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:07 +02:00
Benoît Thébaudeau
7086e91b0e arm: relocate_code(): Use __image_copy_end for end of relocation
Use __image_copy_end instead of __bss_start for the end of the image to
relocate. This is the same as commit 033ca72, but applied to all ARM start.S.

This is a more appropriate symbol naming for an image copy & relocate feature,
and this also saves a useless copy of data put between __image_copy_end and
__bss_start in linker scripts (e.g. relocation information, or MMU
initialization tables used only before jumping to the relocated image).

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:05 +02:00
Benoît Thébaudeau
4b3db1cd31 arm: relocate_code(): Remove useless relocation offset computation
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:05 +02:00
Benoît Thébaudeau
959eaa74b8 arm: relocate_code() is no longer noreturn
Commit e05e5de7fa made ARM's relocate_code()
return to its caller, but it did not update its declaration accordingly.

Fixing this function declaration fixes dropped C code following calls to
relocate_code().

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
2013-04-12 07:55:05 +02:00
Benoît Thébaudeau
508611bcb7 arm: start.S: Fix _TEXT_BASE for SPL
_TEXT_BASE must be set to CONFIG_SPL_TEXT_BASE for generic SPL, and to
CONFIG_SYS_TEXT_BASE for non-SPL builds.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: Tom Rini <trini@ti.com>
2013-04-12 07:55:05 +02:00
Stephen Warren
5eaa215607 ARM: bcm2835: fix get_timer() to return ms
Apparently, CONFIG_SYS_HZ must be 1000. Change this, and fix the timer
driver to conform to this.

Have the timer implementation export a custom API get_timer_us() for use
by the BCM2835 MMC API, which needs us resolution for a HW workaround.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2013-04-04 08:14:54 +02:00
Stephen Warren
88077280c4 ARM: bcm2835: add mailbox driver
The BCM2835 SoC contains (at least) two CPUs; the VideoCore (a/k/a "GPU")
and the ARM CPU. The ARM CPU is often thought of as the main CPU.
However, the VideoCore actually controls the initial SoC boot, and hides
much of the hardware behind a protocol. This protocol is transported
using the SoC's mailbox hardware module.

Here, we add a very simplistic driver for the mailbox module, and define
a few structures for the property messages.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2013-03-20 15:29:20 +01:00
Simon Glass
3929fb0a14 Replace __bss_end__ with __bss_end
Note this is a tree-wide change affecting multiple architectures.

At present we use __bss_start, but mostly __bss_end__. This seems
inconsistent and in a number of places __bss_end is used instead.

Change to use __bss_end for the BSS end symbol throughout U-Boot. This
makes it possible to use the asm-generic/sections.h file on all
archs.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-03-15 16:13:54 -04:00
Albert ARIBAUD
e05e5de7fa arm: move C runtime setup code in crt0.S
Move all the C runtime setup code from every start.S
in arch/arm into arch/arm/lib/crt0.S. This covers
the code sequence from setting up the initial stack
to calling into board_init_r().

Also, rewrite the C runtime setup and make functions
board_init_*() and relocate_code() behave according to
normal C semantics (no jumping across the C stack any
more, etc).

Some SPL targets had to be touched because they use
start.S explicitly or for some reason; the relevant
maintainers and custodians are cc:ed.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2013-01-08 22:14:50 +01:00
Ashok Kumar Reddy
4debcc2c22 ARM: arm1176: Define arch_cpu_init() for s3c64xx
arch_cpu_init() is removed from cpu level to SOC level for arm1176
in commit 4ea6d6b,the same is done for s3c64xx

Signed-off-by: Ashok Kumar Reddy <ashokkourla2000@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2012-11-15 21:08:19 +09:00
Kim Phillips
eef1cf2d5c include/linux/byteorder: import latest endian definitions from linux
u-boot's byteorder headers did not contain endianness attributions
for use with sparse, causing a lot of false positives.  Import the
kernel's latest definitions, and enable them by including compiler.h
and types.h.  They come with 'const' added for some swab functions, so
fix those up, too:

include/linux/byteorder/big_endian.h:46:2: warning: passing argument 1 of '__swab64p' discards 'const' qualifier from pointer target type [enabled by default]

Also, note: u-boot's historic __BYTE_ORDER definition has been
preserved (for the time being at least).

We also remove ad-hoc barrier() definitions, since we're including
compiler.h in files that hadn't in the past:

macb.c:54:0: warning: "barrier" redefined [enabled by default]

In addition, including compiler.h in byteorder changes the 'noinline'
definition to expand to __attribute__((noinline)).  This fixes
arch/powerpc/lib/bootm.c:

bootm.c:329:16: error: attribute '__attribute__': unknown attribute
bootm.c:329:16: error: expected ')' before '__attribute__'
bootm.c:329:25: error: expected identifier or '(' before ')' token

powerpc sparse builds yield:

include/common.h:356:22: error: marked inline, but without a definition

the unknown-reason inlining without a definition is considered obsolete
given it was part of the 2002 initial commit, and no arm version was
'fixed.'

also fixed:
ydirectenv.h:60:0: warning: "inline" redefined [enabled by default]

and:

Configuring for devconcenter - Board: intip, Options: DEVCONCENTER
make[1]: *** [4xx_ibm_ddr2_autocalib.o] Error 1
make: *** [arch/powerpc/cpu/ppc4xx/libppc4xx.o] Error 2
powerpc-fsl-linux-size: './u-boot': No such file
4xx_ibm_ddr2_autocalib.c: In function 'DQS_autocalibration':
include/asm/ppc4xx-sdram.h:1407:13: sorry, unimplemented: inlining failed in call to 'ppc4xx_ibm_ddr2_register_dump': function body not available
4xx_ibm_ddr2_autocalib.c:1243:32: sorry, unimplemented: called from here

and:

In file included from crc32.c:50:0:
crc32table.h:4:1: warning: implicit declaration of function '___constant_swab32' [-Wimplicit-function-declaration]
crc32table.h:4:1: error: initializer element is not constant
crc32table.h:4:1: error: (near initialization for 'crc32table_le[0]')

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
[trini: Remove '#endif' in include/common.h around setenv portion]
Signed-off-by: Tom Rini <trini@ti.com>
2012-11-04 11:00:34 -07:00
Marek Vasut
d731282e7c dm: wdt: arm: Move tnetv107x into drivers/watchdog/
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Oliver Brown <obrown@adventnetworks.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: U-Boot DM <u-boot-dm@lists.denx.de>
2012-10-18 06:52:02 +02:00
Zhong Hongbo
76abfa5781 arm: Fixed the offset for the no relocation.
When the u-boot address of destination equal to  __start,
no relocation. relocation offset(r9) = 0.

Signed-off-by: Zhong Hongbo <bocui107@gmail.com>
Tested-by: Stefano Babic <sbabic@denx.de>
2012-10-04 16:41:15 +02:00
Stephen Warren
59d63f7d2c ARM: arm1176: Define arch_cpu_init() at the SoC level
Commit 86c6326 "ARM: arm1176: enable instruction cache in
arch_cpu_init()" defined arch_cpu_init() in a file that is shared across
all arm1176 SoCs. tnetv107x already implemented this function, which
caused linking to break. Move the new conflicting arch_cpu_init() into
arm1176/bcm2835/init.c so that it doesn't conflict; grep indicates this
function is usually defined at the SoC-level, not the CPU-level, at least
for ARM.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Marek Vasut <marex@denx.de>
2012-09-25 13:27:58 -07:00
Stephen Warren
efad6cf881 ARM: add basic support for the Broadcom BCM2835 SoC
This SoC is used in the Raspberry Pi, for example.

For more details, see:
http://www.broadcom.com/products/BCM2835
http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf.

Initial support is enough to boot to a serial console, execute a minimal
set of U-Boot commands, download data over a serial port, and boot a
Linux kernel. No storage or network drivers are implemented.

GPIO driver originally by Vikram Narayanan <vikram186@gmail.com>
with many fixes from myself.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2012-09-01 14:58:21 +02:00
Stephen Warren
86c632651d ARM: arm1176: enable instruction cache in arch_cpu_init()
Note that this affects all users of the ARM1176 CPU that enable
CONFIG_ARCH_CPU_INIT, not just the BCM2835 SoC, potentially such as
tnetv107x.

Cc: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2012-09-01 14:58:20 +02:00
Zhong Hongbo
448217d4b2 arm: Fix to mistake clean the memory space
In currently, when __bss_start is equal to __bss_end__,
The bss loop will clear all the things in memory space.

But just only when __bss_end__ greater than __bss_start__,
we do the clear bss section operation.

Signed-off-by: Zhong Hongbo <bocui107@gmail.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
2012-07-20 14:24:08 +02:00