Commit graph

4050 commits

Author SHA1 Message Date
Siva Durga Prasad Paladugu
a4d88920e5 Kconfig: Move config IDENT_STRING to Kconfig
Move the config IDENT_STRING to Kconfig and migrate all boards

[sivadur: Migrate zynq boards]
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
[trini: Update configs, add some default to sunxi Kconfig]
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-20 09:30:23 -04:00
Simon Glass
f73329ee82 Kconfig: tpl: Add some TPL support options to Kconfig
Some of the SPL options have TPL equivalents. Add these to Kconfig so that
we can convert these options over to work from Kconfig.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-16 17:03:40 -04:00
Simon Glass
11bde1cd59 Kconfig: spl: Add SPL support options to Kconfig
There are a lot of SPL options in U-Boot to enable various features and
drivers. Currently these do not use Kconfig. Add them to Kconfig along
with suitable help, and drop them from the README.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-16 17:03:39 -04:00
Simon Glass
76f1f38816 Use separate options for TPL support
At present TPL uses the same options as SPL support. In a few cases the board
config enables or disables the SPL options depending on whether
CONFIG_TPL_BUILD is defined.

With the move to Kconfig, options are determined for the whole build and
(without a hack like an #undef in a header file) cannot be controlled in this
way.

Create new TPL options for these and update users. This will allow Kconfig
conversion to proceed for these boards.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-16 17:03:39 -04:00
Simon Glass
c2ae7d8220 Kconfig: Move SPL settings into their own file
Move the SPL settings into common/spl where most of the SPL code is kept.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-16 17:03:36 -04:00
Heiko Schocher
9dd1d0aa4e common, kconfig: move VERSION_VARIABLE to Kconfig
move VERSION_VARIABLE from board config file into a
Kconfig option.

Signed-off-by: Heiko Schocher <hs@denx.de>
2016-09-09 18:14:18 -04:00
Jonathan Gray
bac17b78da image-fit: switch ENOLINK to ENOENT
ENOLINK is not required by POSIX and does not exist on OpenBSD
and likely other systems.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
2016-09-07 08:49:06 -04:00
Robert P. J. Day
57247d9cbf common/Kconfig: Fix various innocuous typos.
Correct a small number of spelling mistakes.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
2016-09-07 08:49:02 -04:00
Paul Kocialkowski
85a3772973 spl: Rework image header parse to allow abort on raw image and os boot
This reworks spl_set_header_raw_uboot to allow having both os boot
(which comes with a valid header) and aborting when no valid header is
found (thus excluding raw u-boot.bin images).

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-09-06 13:41:38 -04:00
Andreas Bießmann
950fe26de9 image-fit: fix fit_image_load() OS check
Commit 62afc60188 introduced fpga image load via
bootm but broke the OS check in fit_image_load().

This commit removes following compiler warning:

---8<---
In file included from tools/common/image-fit.c:1:
/Volumes/devel/u-boot/tools/../common/image-fit.c:1715:39: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
        os_ok = image_type == IH_TYPE_FLATDT || IH_TYPE_FPGA ||
                                             ^  ~~~~~~~~~~~~
/Volumes/devel/u-boot/tools/../common/image-fit.c:1715:39: note: use '|' for a bitwise operation
        os_ok = image_type == IH_TYPE_FLATDT || IH_TYPE_FPGA ||
                                             ^~
                                             |
1 warning generated.
--->8---

Signed-off-by: Andreas Bießmann <andreas@biessmann.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
2016-09-06 13:18:19 -04:00
Dongpo Li
8c83c0303c net: mii: check phy advertising register when geting link status
When phy autoneg on, the link speed and duplex should be
determined by phy advertising register and
phy link partner ability register.
Check phy advertising register when geting phy link speed and
duplex if autoneg on.

Signed-off-by: Dongpo Li <lidongpo@hisilicon.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2016-08-22 14:21:23 -05:00
James Byrne
fc18e9b3d5 common: cli_readline: Improve command line editing
This improves the cread_line() function so that it will correctly
process the 'Home', 'End', 'Delete' and arrow key escape sequences
produced by various terminal emulators. This makes command line editing
a more pleasant experience.

The previous code only supported the cursor keys and the 'Home' key, and
only for certain terminal emulator configurations. This adds support for
the 'End and 'Delete' keys, and recognises a wider range of escape
sequences. For example, the left arrow key can be 'ESC O D' instead of
'ESC [ D', and the 'Home' key can be 'ESC [ H', 'ESC O H', 'ESC 1 ~' or
'ESC 7 ~', depending on what terminal emulator you use and how it is
configured.

Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Changes for v2
   - Explicitly initialize variable to avoid spurious compiler warning.
Changes for v3
   - Remove unnecessary setting of 'act' to ESC_REJECT (now its default
     value).
2016-08-20 14:03:24 -04:00
Tom Rini
5db28905c9 cmd: Split 'bootz' and 'booti' out from 'bootm'
The bootz and booti commands rely on common functionality that is found
in common/bootm.c and common/bootm_os.c.  They do not however rely on
the rest of cmd/bootm.c to be implemented so split them into their own
files.  Have various Makefiles include the required infrastructure for
CONFIG_CMD_BOOT[IZ] as well as CONFIG_CMD_BOOTM.  Move the declaration
of 'images' over to common/bootm.c.

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-08-20 11:35:07 -04:00
Tom Rini
4cc9699be7 common: env_nand: Ensure that we have nand_info[0] prior to use
Now that nand_info[] is an array of pointers we need to ensure that it's
been populated prior to use.  We may for example have ENV in NAND set in
configurations that run on boards with and without NAND (where default
env is fine enough, such as omap3_beagle and beagleboard (NAND) vs
beagle xM (no NAND)).

Fixes: b616d9b0a7 ("nand: Embed mtd_info in struct nand_chip")
Cc: Scott Wood <oss@buserror.net>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Scott Wood <oss@buserror.net>
2016-08-15 18:46:41 -04:00
Chris Zankel
de5e5cea02 xtensa: add support for the xtensa processor architecture [1/2]
The Xtensa processor architecture is a configurable, extensible,
and synthesizable 32-bit RISC processor core provided by Cadence.

This is the first part of the basic architecture port with changes to
common files. The 'arch/xtensa' directory, and boards and additional
drivers will be in separate commits.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-08-15 18:46:38 -04:00
Joe Hershberger
cc2593128f net: mii: Clean up legacy glue that is not used
The cleanup of the legacy mii registration API that's no longer used now
that the drivers have been converted to use the (more) modern API.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-08-15 15:29:04 -05:00
Tom Rini
f4b0df1823 Merge git://git.denx.de/u-boot-dm 2016-08-12 16:00:50 -04:00
Stephen Warren
11e44fc6bd fdt_support: fdt_translate_address() blob const correctness
The next patch will call fdt_translate_address() from somewhere with a
"const void *blob" rather than a "void *blob", so fdt_translate_address()
must accept a const pointer too. Constify the minimum number of function
parameters to achieve this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Squashed in build fix from Stephen:
Signed-off-by: Simon Glass <sjg@chromium.org>
2016-08-12 09:20:27 -06:00
Andreas Dannenberg
eba3fbd6a1 common: image: Add support for post-processing of images
This commit allows injecting a board/platform/device-specific post-
processing function into the FIT image data loading process, which can
include modifying the size and altering the starting source address of
an image data artifact. This might be desired to do things like strip
headers or footers attached to the images before they were packaged into
the FIT, or to perform operations such as decryption or authentication.
Introduce new configuration option CONFIG_FIT_IMAGE_POST_PROCESS to
allow controlling this feature. If enabled, a platform-specific post-
process function must be provided.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-08-12 09:22:18 -04:00
Mike Looijmans
5aa79f2676 spl_nor.c: Support devicetree sizes different from 16k
The devicetrees for various platforms already exceed 16k. Add a define
CONFIG_SYS_FDT_SIZE to specify the FDT size, and set to 16k for the
two boards that define this CONFIG_SYS_FDT_BASE parameter. This
allows platforms with larger devicetree blobs to boot from NOR.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
2016-08-08 13:32:52 -04:00
Michal Simek
e2f88dfd2d libfdt: Introduce new ARCH_FIXUP_FDT option
Add new Kconfig option to disable arch_fixup_fdt() calls for cases where
U-Boot shouldn't update memory setup in DTB file.
One example of usage of this option is to boot OS with different memory
setup than U-Boot use.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-07-31 19:37:08 -06:00
Tom Rini
fe34b6a484 Merge git://git.denx.de/u-boot-dm 2016-07-27 22:30:20 -04:00
Simon Glass
1e2b3ef865 dm: spl: mmc: Support raw partitions with CONFIG_BLK
Fix up the call in mmc_load_image_raw_partition() to use the correct
function to obtain the MMC device, so that this code can support driver
model.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27 14:15:54 -06:00
Simon Glass
911954859d dm: Use dm_scan_fdt_dev() directly where possible
Quite a few places have a bind() method which just calls dm_scan_fdt_dev().
We may as well call dm_scan_fdt_dev() directly. Update the code to do this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27 14:15:54 -06:00
Simon Glass
2e3f1ff63f dm: Convert users from dm_scan_fdt_node() to dm_scan_fdt_dev()
This new function is more convenient for callers, and handles pre-relocation
situations automatically.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-27 14:15:07 -06:00
Tom Rini
c6f086ddcb Merge branch 'master' of git://git.denx.de/u-boot-video 2016-07-27 15:22:21 -04:00
Alexey Brodkin
b6de2cd7ee splash: Introduce default_splash_locations
This change introduces default_splash_locations which
simplifies splash recovery from the first partition of
USB/MMC/SATA drive.

Given usual mapping of the first partition of external media for
basic boot stuff like uImage/zImage, .dtb etc it looks quite
obvious option to put there splash.bmp as well.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
2016-07-26 08:47:37 +02:00
Alexey Brodkin
d7b60fbfa6 splash: Accommodate DM_USB in splash_init_usb()
Current implementation of splash_init_usb() requires usb_stor_scan()
which doesn't exist in case of DM_USB simply because real probing
happens right in usb_init().

So disable usage of usb_stor_scan() in case of DM_USB.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Robert Winkler <robert.winkler@boundarydevices.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-25 22:42:10 +02:00
mario.six@gdsys.cc
e8fb4358c2 common: fit: Allow U-Boot images to be booted
In certain circumstances it comes in handy to be able to boot into a second
U-Boot. But as of now it is not possible to boot a U-Boot binary that is inside
a FIT image, which is problematic for projects that e.g. need to guarantee a
unbroken chain of trust from SOC all the way into the OS, since the FIT signing
mechanism cannot be used.

This patch adds the capability to load such FIT images.

An example .its snippet (utilizing signature verification) might look
like the following:

images {
	firmware@1 {
		description = "2nd stage U-Boot image";
		data = /incbin/("u-boot-dtb.img.gz");
		type = "firmware";
		arch = "arm";
		os = "u-boot";
		compression = "gzip";
		load = <0x8FFFC0>;
		entry = <0x900000>;
		signature@1 {
			algo = "sha256,rsa4096";
			key-name-hint = "key";
		};
	};
};

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-07-25 12:00:05 -04:00
Lokesh Vutla
3cc1f380e5 spl: fit: Fix the number of bytes read in raw mode
In raw mode a full sector is to be read even if image covers part of
a sector. Number of sectors are calculated as ROUND_UP(size)/sec_size by FIT
framework. This calculation assumes that image is at the 0th offset of a sector,
which is not true always in FIT case. So, include the image offset while
calculating number of sectors.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-07-22 14:46:25 -04:00
Ladislav Michl
431889d6ad spl: zImage support in Falcon mode
Other payload than uImage is currently considered to be raw U-Boot
image. Check also for zImage in Falcon mode.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-07-22 09:53:00 -04:00
Ladislav Michl
bf55cd4f3e spl: support loading from UBI volumes
Add support for loading from UBI volumes on the top of NAND
and OneNAND.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2016-07-22 09:53:00 -04:00
Siva Durga Prasad Paladugu
4d25507f3d Kconfig: Move option CONFIG_SYS_NO_FLASH to Kconfig
Move config option CONFIG_SYS_NO_FLASH as Kconfig
option. All the boards which needs to enable this
option can be done through defconfigs

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2016-07-22 14:06:11 +02:00
Michal Simek
1eefe14f66 spl: Fix compilation warnings for arm64
Make code 64bit aware.

Warnings:
+../arch/arm/lib/spl.c: In function ‘jump_to_image_linux’:
+../arch/arm/lib/spl.c:63:3: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
+../common/spl/spl_fat.c: In function ‘spl_load_image_fat’:
+../common/spl/spl_fat.c:91:33: warning: cast to pointer from integer
of different size [-Wint-to-pointer-cast]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-22 14:03:54 +02:00
Tom Rini
66669fcf80 Merge git://git.denx.de/u-boot-fsl-qoriq
Signed-off-by: Tom Rini <trini@konsulko.com>

Conflicts:
	arch/arm/cpu/armv8/Makefile
	arch/arm/lib/bootm-fdt.c
2016-07-19 16:38:57 -04:00
Robert P. J. Day
62a3b7dd08 Various, unrelated tree-wide typo fixes.
Fix a number of typos, including:

     * "compatble" -> "compatible"
     * "eanbeld" -> "enabled"
     * "envrionment" -> "environment"
     * "FTD" -> "FDT" (for "flattened device tree")
     * "ommitted" -> "omitted"
     * "overriden" -> "overridden"
     * "partiton" -> "partition"
     * "propogate" -> "propagate"
     * "resourse" -> "resource"
     * "rest in piece" -> "rest in peace"
     * "suport" -> "support"
     * "varible" -> "variable"

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
2016-07-16 09:43:12 -04:00
York Sun
50e93b9565 armv8: Add tlb_allocated to arch global data
When secure ram is used, MMU tables have to be put into secure ram.
To use common MMU code, gd->arch.tlb_addr will be used to host TLB
entry pointer. To save allocated memory for later use, tlb_allocated
variable is added to global data structure.

Signed-off-by: York Sun <york.sun@nxp.com>
2016-07-15 09:01:43 -07:00
York Sun
e61a7534e3 armv8: Move secure_ram variable out of generic global data
Secure_ram variable was put in generic global data. But only ARMv8
uses this variable. Move it to ARM specific data structure.

Signed-off-by: York Sun <york.sun@nxp.com>
2016-07-15 09:01:43 -07:00
Tom Rini
1f9ef0dca0 Merge branch 'master' of http://git.denx.de/u-boot-sunxi 2016-07-15 10:44:01 -04:00
Tom Rini
ebe621d5fb Merge git://git.denx.de/u-boot-dm 2016-07-15 08:06:22 -04:00
Siarhei Siamashka
19e99fb4ff sunxi: Support booting from SPI flash
Allwinner devices support SPI flash as one of the possible
bootable media type. The SPI flash chip needs to be connected
to SPI0 pins (port C) to make this work. More information is
available at:

    https://linux-sunxi.org/Bootable_SPI_flash

This patch adds the initial support for booting from SPI flash.
The existing SPI frameworks are not used in order to reduce the
SPL code size. Right now the SPL size grows by ~370 bytes when
CONFIG_SPL_SPI_SUNXI option is enabled.

While there are no popular Allwinner devices with SPI flash at
the moment, testing can be done using a SPI flash module (it
can be bought for ~2$ on ebay) and jumper wires with the boards,
which expose relevant pins on the expansion header. The SPI flash
chips themselves are very cheap (some prices are even listed as
low as 4 cents) and should not cost much if somebody decides to
design a development board with an SPI flash chip soldered on
the PCB.

Another nice feature of the SPI flash is that it can be safely
accessed in a device-independent way (since we know that the
boot ROM is already probing these pins during the boot time).
And if, for example, Olimex boards opted to use SPI flash instead
of EEPROM, then they would have been able to have U-Boot installed
in the SPI flash now and boot the rest of the system from the SATA
hard drive. Hopefully we may see new interesting Allwinner based
development boards in the future, now that the software support
for the SPI flash is in a better shape :-)

Testing can be done by enabling the CONFIG_SPL_SPI_SUNXI option
in a board defconfig, then building U-Boot and finally flashing
the resulting u-boot-sunxi-with-spl.bin binary over USB OTG with
a help of the sunxi-fel tool:

   sunxi-fel spiflash-write 0 u-boot-sunxi-with-spl.bin

The device needs to be switched into FEL (USB recovery) mode first.
The most suitable boards for testing are Orange Pi PC and Pine64.
Because these boards are cheap, have no built-in NAND/eMMC and
expose SPI0 pins on the Raspberry Pi compatible expansion header.
The A13-OLinuXino-Micro board also can be used.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2016-07-15 08:34:34 +02:00
Simon Glass
7d23b9cf2b dm: spl: Bind in all devices in SPL with of-platdata
When CONFIG_OF_PLATDATA is enabled, we cannot use the u-boot,dm-pre-reloc
device tree property since the device tree is not available. However,
dt-platdata.c only includes devices which would have been present in the
device tree, and we can assume that all such devices are needed for SPL.
If they were not needed, they would have been omitted to save space.

So in this case, bind all devices regardless of the u-boot,dm-pre-reloc
setting. This avoids needing to add a DM_FLAG_PRE_RELOC to every driver,
thus affecting U-Boot proper also.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
d223e0a822 dm: spl: Don't set up device tree with of-platdata
When this feature is enabled, we should not access the device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
12c550d4fb spl: Drop include of i2c.h
This file does not appear to use I2C, so drop this include.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Anatolij Gustschin
ba169d981f board_f: prevent misleading "Watchdog enabled" output
Output the "Watchdog enabled" message only if hw_watchdog_init()
call really happened.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
2016-07-14 18:33:09 -04:00
Anatolij Gustschin
46d7a3b3d3 board_f: init designware watchdog if CONFIG_DESIGNWARE_WATCHDOG=y
The designware watchdog init is skipped even if CONFIG_DESIGNWARE_WATCHDOG
is enabled. Fix it.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
2016-07-14 18:33:08 -04:00
Hector Palacios
19e8649e59 bootm: fixup silent Linux out of BOOTM_STATE_LOADOS state
The function fixup_silent_linux() is called in status BOOTM_STATE_LOADOS
to silence Linux if variable 'silent' is set.
Currently only the 'bootm' command state machine contains
BOOTM_STATE_LOADOS, but others like 'booti' or 'bootz' commands do not.
This means silent Linux does not work with these commands.

This patch moves the fixup_silent_linux() call out of the
BOOTM_STATE_LOADOS state and into BOOTM_STATE_OS_PREP, to silence Linux
independently of the used command (booti, bootm or bootz).

Signed-off-by: Hector Palacios <hector.palacios@digi.com>
2016-07-14 18:22:44 -04:00
Simon Glass
b9c771b04c sandbox: Don't exit when bootm completes
At present sandbox exits when the 'bootm' command completes, since it is not
actually able to run the OS that is loaded. Normally 'bootm' failure is
considered a fatal error in U-Boot.

However this is annoying for tests, which may want to examine the state
after a test is complete. In any case there is a 'reset' command which can
be used to exit, if required.

Change the behaviour to return normally from the 'bootm' command on sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Teddy Reed <teddy.reed@gmail.com>
2016-07-14 18:22:32 -04:00
Simon Glass
1426220b0e image: Add functions to obtain category information
Add generic functions which can look up information about a category:

- the number of items in the category
- the category description
- an item long time
- an item short time

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-07-14 18:22:30 -04:00
Simon Glass
30495bff35 image: Add a name for invalid types
At present the name is NULL, which prevents qsort() fromp being used. Use
the name "invalid" instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-07-14 18:22:29 -04:00