Commit graph

25643 commits

Author SHA1 Message Date
Bo Shen
abe307ddb8 ARM: atmel: add pcr related definition
Using CPU_HAS_PCR micro to present the SoC has pcr
(peripheral control register).

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:19 +02:00
Bo Shen
b24c1a10b5 ARM: atmel: use pcr to enable or disable peripheral clock
When use pcr (peripheral control register), then we won't need
to care about the peripheral ID.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:18 +02:00
Bo Shen
7b1dc26fae ARM: atmel: sama5d3: add timings register
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:17 +02:00
Bo Shen
d6b7943464 ARM: atmel: sama5d3xek: enable NOR flash support
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:16 +02:00
Bo Shen
a931b13774 ARM: atmel: sama5d3xek: add nor flash init function
Add NOR flash hardware init function, including SMC and PIO
configuration.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:15 +02:00
Wu, Josh
14b3b44eda mtd: atmel-nand: use pmecc_readl(b)/pmecc_writel to access the pmecc register
We defined the macro pmecc_readl(b)/pmecc_writel for pmecc register access.
But in the driver we also use the readl(b)/writel.
To keep consistent, this patch make all use pmecc_readl(b)/pmecc_writel.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
2014-09-19 00:11:13 +02:00
Masahiro Yamada
9170818a4e kconfiglib: change SPDX-License-Identifier to ISC
Commit f219e01311 (tools: Import Kconfiglib)
added SPDX GPL-2.0+ to this library by mistake.
It should be ISC.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Ulf Magnusson <ulfalizer@gmail.com>
2014-09-17 21:03:18 -04:00
Tom Rini
e38b15b061 Merge branch 'master' of git://git.denx.de/u-boot-arm 2014-09-17 18:01:04 -04:00
Albert ARIBAUD
c292adae17 Merge branch 'u-boot-imx/master' into 'u-boot-arm/master' 2014-09-17 23:35:34 +02:00
Tom Rini
1ee30aeed4 Revert "ARM: SPL: do not set gd again"
At the high level, the problem is that we set gd multiple times (and
still do, even after the commit we're reverting).  We set important
parts of gd to the copy which is not above stack but rather in the data
section.  For the release, we're going to revert this change and for the
next release we shall correct things to only, really, set gd once to an
appropriate location and ensure that comments about it are correct too.

This reverts commit f0c3a6c4ad.

Acked-by: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: Tom Rini <trini@ti.com>
2014-09-16 12:24:00 -04:00
Masahiro Yamada
016a954ee9 kconfig: armv8: move CONFIG_ARM64 to Kconfig
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-16 12:24:00 -04:00
Masahiro Yamada
8813fdaf4b vexpress64: kconfig: consolidate CONFIG_TARGET_VEXPRESS_AEMV8A_SEMI
We do not have to distinguish CONFIG_TARGET_VEXPRESS_AEMV8A_SEMI
from CONFIG_TARGET_VEXPRESS_AEMV8A.  Rename the former to the latter.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Steve Rae <srae@broadcom.com>
Cc: David Feng <fenghua@phytium.com.cn>
2014-09-16 12:24:00 -04:00
Gerhard Sittig
f395e75e27 net: dns: fix for DNS queries sent to the wrong MAC address
When a DNS query is sent out, the ethernet packet can get directed to
the MAC address of a server that was communicated to before.  This is
wrong when the previously stored MAC address corresponds to a different
server's IP address, i.e. when the IP address of the previous and the
current communication are different.

The error can get reproduced by running a sequence of e.g. a TFTP
download and a DNS query, where the TFTP and DNS servers reside on
individual machines.

The fix is to clear the server's MAC address that might be left from a
previous operation, and to fetch the peer's MAC address in a new ARP
lookup, before the DNS query is sent.  This is the approach taken in
other network services, like 8e52533d10 ("net: tftpsrv: Get correct
client MAC address").

Reported-by: Dirk Zimoch <dirk.zimoch@psi.ch>
Signed-off-by: Gerhard Sittig <gsi@denx.de>
2014-09-16 12:24:00 -04:00
Masahiro Yamada
11b5db6787 kconfig: add sanity checks for SPL configuration
For the SPL configuration, "make <dir>/<target>" is used.
Here,
  <dir> is either "spl" or "tpl"
  <target> is one of "config", "menuconfig", "xconfig", etc.

This commit adds two checks:

[1] If <dir> is given an unsupported subimage, the configuration
    should error out like this:

  $ make qpl/menuconfig
  ***
  *** "make qpl/menuconfig" is not supported.
  ***

[2] Make sure that "CONFIG_SPL" is enabled in the ".config" before
    running "make spl/menuconfig.  Otherwise, the SPL image
    is not built at all.  Having "spl/.config" makes no sense.
    In such a case, the configuration should exit with a message:

  $ make spl/menuconfig
  ***
  *** Create ".config" with "CONFIG_SPL" enabled
  *** before "make spl/menuconfig".
  ***

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Suggested-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:59 -04:00
Simon Glass
ad6e48e509 net: usb: Add SMSC copyright to smsc95xx driver
This driver was upstreamed without an SMSC copyright, even thought it seems
that SMSC was the original author.

See the kernel version for a code comparison:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f7ca802bdae2ca41022618391c70c2876d92190

It's not clear who actually moved this code, or whether the kernel was the
original source, or somewhere else, but it probably should still have the
SMSC copyright.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:59 -04:00
maxin.john@enea.com
5da163d665 mtdcore: Fix a build error with CONFIG_CMD_MTDPARTS_SPREAD
This patch fixes the build error for CONFIG_CMD_MTDPARTS_SPREAD

Signed-off-by: Maxin B. John <maxin.john@enea.com>
2014-09-16 12:23:59 -04:00
Khoronzhuk, Ivan
7206111e52 mtd: nand: davinci_nand: update write_page function for keystone RBL
After mtd was synced with Linux 3.14
(ff94bc40af)
the number of parameters for write_page function of nand_chip was
changed. The additional two var were needed for subpage write.
As keystone has no supbage write they are not needed. So correct
only function definition by upgrading it's parameter list.
That helps to get ritd of compilation warning.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
2014-09-16 12:23:59 -04:00
Masahiro Yamada
c970dffedb generic_board: do not set gd->fdt_blob unless CONFIG_OF_CONTROL=y
gd->fdt_blob is used for FDT control of U-Boot.
If CONFIG_OF_CONTROL is not defined, it is useless.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:59 -04:00
Masahiro Yamada
8e71443211 kbuild: standalone: simplify clean-files
Files added $(extra-) are removed by "make clean".
Besides, wildcard "*.srec *.bin" is simpler.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-16 12:23:59 -04:00
Masahiro Yamada
021f049597 scripts/Makefile.clean: clean also $(extra-m) and $(extra-)
This commit is a backport from Linux Kernel,
commit 9d5db8949f1ecf4019785b04d8986835d3c0e99e,
written by me.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
8caaec6260 kconfig: show an error message when defconfig is not found
When a non-existing defconfig is specified,
display an easy-to-understand message
(fake the error message on Linux Kernel):

  $ make foo_defconfig
  ***
  *** Can't find default configuration "confis/foo_defconfig"!
  ***

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
2014-09-16 12:23:58 -04:00
Gabriel Huau
ec3b48201d common: fix include guards for CONFIG_MP
This was breaking the build for some boards:
MPC8536DS MPC8536DS_36BIT MPC8536DS_SDCARD MPC8536DS_SPIFLASH qemu-ppce500

Include only these features for some PPC boards if the configuration for MultiProcessor
is enabled.

Signed-off-by: Gabriel Huau <contact@huau-gabriel.fr>
Cc: Tom Rini <trini@ti.com>
Cc: York Sun <yorksun@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
f458e3559b kconfig: fix a bug of "make config"
Since 3ff291f371
(kconfig: convert Kconfig helper script into a shell script),
"make config" is not working because of a missing '$' before '(Q)'.

Besides, "make config" should be invoked via scripts/multiconfig.sh
to avoid a warning message:
Kconfig:11:warning: environment variable KCONFIG_OBJDIR undefined

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
dee745bf3d kconfig: fix savedefconfig to handle TPL correctly
Since 3ff291f371
(kconfig: convert Kconfig helper script into a shell script),
"make savedefconfig" of TPL boards has not been working.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.o.rg
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
8dffe663a2 kconfig: fix whitespace handling bug of savedefconfig
Commit 3ff291f371
(kconfig: convert Kconfig helper script into a shell script)
introduced another regression.

Shell usually handles whitespaces as separators,
so "make saveconfig" outputs

  # CONFIG_FOO is not set

into:

  #
  CONFIG_FOO
  is
  not
  set

Whitespaces should not be treated as separators here.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
93481b9f6b kconfig: fix savedefconfig to output empty defconfig
Commit 3ff291f371
(kconfig: convert Kconfig helper script into a shell script)
introduced a minor regression.

make alldefconfig; make savedefconfig
should create an empty 'defconfig'.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:58 -04:00
Masahiro Yamada
2d5db193ee standalone: use GCC_VERSION defined in compiler-gcc.h
Now GCC_VERSION is defined in include/linux/compiler-gcc.h
(with a little different definition).
Use it and delete the one in examples/standlone/stub.c.

This should work on Clang too because __GNUC__, __GNUC_MINOR__,
__GNUC_PATCHLEVEL__ are also defined on Clang.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-09-16 12:23:57 -04:00
Masahiro Yamada
fb8ffd7cfc compiler*.h: sync include/linux/compiler*.h with Linux 3.16
Copy them from Linux v3.16 tag.
My main motivation of this commit is to add compiler-clang.h.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-09-16 12:23:57 -04:00
Steve Rae
e6ca1ad604 implement the Android sparse image format
update to provide usable implementation to U-Boot

Signed-off-by: Steve Rae <srae@broadcom.com>
2014-09-16 12:23:57 -04:00
Steve Rae
1c39d856db cleanup code which handles the Android sparse image format
- port dprintf() to debug()
- update formatting

Signed-off-by: Steve Rae <srae@broadcom.com>
2014-09-16 12:23:57 -04:00
Steve Rae
20465c73b4 update code which handles Android sparse image format
- remove unnecessary functions

Signed-off-by: Steve Rae <srae@broadcom.com>
2014-09-16 12:23:57 -04:00
Steve Rae
b4e4bbe5ab add code to handle Android sparse image format
Add original file (pristine) from :
  https://www.codeaurora.org/cgit/quic/la/kernel/lk/plain/app/aboot/aboot.c?h=master
[3b5092d20b]

Signed-off-by: Steve Rae <srae@broadcom.com>
2014-09-16 12:23:57 -04:00
Masahiro Yamada
5a8608e586 cmd_mem: add static to internally used functions
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:57 -04:00
Peng Fan
f9f040b215 kgdb: Remove first_entry for kgdb
There are two ways to run into handle_exception, run command 'kgdb' and
encounter a breakpoint which triggers exception handling.

The origin source code only saves regs when first run command 'kgdb'.
Take the following for example, When run 'kgdb', regs is saved to entry_regs.
When run 'bootz', regs is not saved. However, if we set a breakpoint, then
continue. When breakpoint is reached, run `quit`, and Now return to the
instruction which follows kgdb, but not bootz.This may cause errors. So,
save regs for each handle_exception call to return to the correct place.
Example:
Target      |    Host
=>kgdb      |    (gdb)b bootz
            |    (gdb)c
=>bootz     |
            |    (gdb)Here stop because of breakpoint
            |    (gdb)q

Signed-off-by: Peng Fan <van.freenix@gmail.com>
2014-09-16 12:23:56 -04:00
Masahiro Yamada
f6c8f38ec6 tools/genboardscfg.py: improve performance more with Kconfiglib
The idea of using Kconfiglib was given by Tom Rini.
It allows us to scan lots of defconfigs very quickly.
This commit also uses multiprocessing for further acceleration.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Suggested-by: Tom Rini <trini@ti.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-09-16 12:23:56 -04:00
Masahiro Yamada
f219e01311 tools: Import Kconfiglib
Kconfiglib is the flexible Python Kconfig parser and library
created by Ulf Magnusson.
(https://github.com/ulfalizer/Kconfiglib)

This commit imports kconfiglib.py from
commit ce84c22e58fa59cb93679d4ead03c3cd1387965e,
with ISC SPDX-License-Identifier.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Cc: Ulf Magnusson <ulfalizer@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
2014-09-16 12:23:56 -04:00
Masahiro Yamada
c25a1784d0 SPDX: Add ISC SPDX-License-Identifier
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
2014-09-16 12:23:56 -04:00
Masahiro Yamada
3b61297024 kbuild: force to define __UBOOT__ in all the C sources
U-Boot has imported various source files from other projects,
mostly Linux.

Something like

  #ifdef __UBOOT__
    [ modification for U-Boot ]
  #else
    [ original code ]
  #endif

is an often used strategy for clarification of adjusted parts,
that is, easier re-sync in future.

Instead of defining __UBOOT__ in each source file,
passing it from the top Makefile would be easier.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
2014-09-16 12:23:56 -04:00
Thierry Reding
5d9f423ddb rtl8169: Defer network packet processing
When network protocol errors occur (such as a file not being found on a
TFTP server), the processing done by the NetReceive() function will end
up calling the driver's .halt() implementation. However, after that the
device no longer has access to the memory buffers and will cause errors
such as this in the rtl_recv() function when trying to hand descriptors
back to the device:

	pci_hose_bus_to_phys: invalid physical address

This can be fixed by deferring processing of network packets until the
descriptors have been handed back. That way rtl_halt() tearing down
network buffers is not going to prevent access to the buffers.

Reported-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-09-16 12:23:45 -04:00
Vasili Galka
9f680d2d97 openrisc: Fix a few type cast related warnings
Use size_t type for positive offsets instead of the loff_t type. The
later is defined as long long, which is larger than the pointer type
on OpenRISC architecture and therefore the following warning was
generated:

"warning: cast to pointer from integer of different size"

Signed-off-by: Vasili Galka <vvv444@gmail.com>
2014-09-15 13:32:56 -04:00
Vasili Galka
5d69a5d178 Fix a few printf argument verification warnings
The parameters of size_t type shall be formatted using "%zu" and not
using "%d".

Precision argument for the "%.*s" parameters shall be of int type.

Signed-off-by: Vasili Galka <vvv444@gmail.com>
2014-09-15 13:32:55 -04:00
Masahiro Yamada
2dd2cde11c cosmetic: README.scrapyard: add NIOS2 boards
Commit 70fbc461 removed obsolete PCI5441 and PK1C20 boards.
This commit adds them to README.scrapyard and also fills
some commit IDs and dates for removed boards.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
2014-09-15 13:32:55 -04:00
Masahiro Yamada
461be2f96e kconfig: remove redundant "string" type in arch and board Kconfigs
Now the types of CONFIG_SYS_{ARCH, CPU, SOC, VENDOR, BOARD, CONFIG_NAME}
are specified in arch/Kconfig.

We can delete the ones in arch and board Kconfig files.

This commit can be easily reproduced by the following command:

find . -name Kconfig -a ! -path ./arch/Kconfig | xargs sed -i -e '
/config[[:space:]]SYS_\(ARCH\|CPU\|SOC\|\VENDOR\|BOARD\|CONFIG_NAME\)/ {
    N
    s/\n[[:space:]]*string//
}
'

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-13 16:43:55 -04:00
Masahiro Yamada
3174e4e812 kconfig: add CONFIG_SYS_{ARCH, CPU, ...} type def to arch/Kconfig
This commit adds the type definitions (+ help messages) of
CONFIG_SYS_{ARCH, CPU, SOC, VENDOR, BOARD, CONFIG_NAME} to arch/Kconfig,
which would save lots of type defs for taget boards.
(See also the next commit.)

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-13 16:43:50 -04:00
Tom Rini
8d028d404f Merge branch 'master' of git://git.denx.de/u-boot-dm 2014-09-13 16:32:52 -04:00
Tom Rini
114cc4290b Merge branch 'master' of git://git.denx.de/u-boot-arm 2014-09-12 11:27:46 -04:00
Benoît Thébaudeau
a7f99bf139 arm: Fix _start for CONFIG_SYS_DV_NOR_BOOT_CFG
The boards using CONFIG_SYS_DV_NOR_BOOT_CFG (i.e. calimain,
da850evm_direct_nor and enbw_cmc) had the _start symbol defined after
the CONFIG_SYS_DV_NOR_BOOT_CFG word rather than before it in
arch/arm/lib/vectors.S. Because of that, if by lack of luck
'gd->mon_len = (ulong)&__bss_end - (ulong)_start' (see setup_mon_len())
was a multiple of 4 kiB (see reserve_uboot()), then the last BSS word
overlapped the first word of the following reserved RAM area (or went
beyond the top of RAM without such an area) after relocation because
__image_copy_start did not match _start (see relocate_code()).

This was broken by commit 41623c9 'arm: move exception handling out of
start.S files', which defined _start twice (before and after the
CONFIG_SYS_DV_NOR_BOOT_CFG word), then by commit 0a26e1d 'arm: fix a
double-definition error of _start symbol', which kept the definition of
the _start symbol after the CONFIG_SYS_DV_NOR_BOOT_CFG word. This new
commit fixes this issue by restoring the original behavior, i.e. by
defining the _start symbol before the CONFIG_SYS_DV_NOR_BOOT_CFG word.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Manfred Rudigier <manfred.rudigier@omicron.at>
Cc: Christian Riesch <christian.riesch@omicron.at>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Heiko Schocher <hs@denx.de>
2014-09-11 18:04:39 +02:00
Benoît Thébaudeau
58f9e1ae63 arm: Make reset position-independent
Some boards, like mx31pdk and tx25, require the beginning of the SPL
code to be position-independent. For these two boards, this is because
they use the i.MX external NAND boot, which starts by executing the
first NAND Flash page from the NFC page buffer. The SPL then needs to
copy itself to its actual link address in order to free the NFC page
buffer and use it to load the non-SPL image from Flash before running
it. This means that the SPL runtime address differs from its link
address between the reset and the initial copy performed by
board_init_f(), so this part of the SPL binary must be
position-independent.

This requirement was broken by commit 41623c9 'arm: move exception
handling out of start.S files', which used an absolute address to branch
to the reset routine. This new commit restores the original behavior,
which just performed a relative branch. This fixes the boot of mx31pdk
and tx25.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Reported-by: Helmut Raiger <helmut.raiger@hale.at>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Magnus Lilja <lilja.magnus@gmail.com>
Cc: John Rigby <jcrigby@gmail.com>
Tested-by: Magnus Lilja <lilja.magnus@gmail.com>
2014-09-11 18:04:34 +02:00
Ye.Li
4c97f16911 imx: mx6slevk: Change to use generic board
Enable CONFIG_SYS_GENERIC_BOARD for imx6slevk to use generic board.

Signed-off-by: Ye.Li <B37916@freescale.com>
2014-09-11 11:04:26 +02:00
Ye.Li
9500fac7ea imx: mx6q/dlarm2: Change to use generic board
Enable the CONFIG_SYS_GENERIC_BOARD for imx6q/dl arm2 board to
use generic board.

Signed-off-by: Ye.Li <B37916@freescale.com>
2014-09-11 11:02:39 +02:00