Commit Graph

23 Commits

Author SHA1 Message Date
Simon Glass
51bb33846a bootm: Support string substitution in bootargs
In some cases it is necessary to pass parameters to Linux so that it will
boot correctly. For example, the rootdev parameter is often used to
specify the root device. However the root device may change depending on
whence U-Boot loads the kernel. At present it is necessary to build up
the command line by adding device strings to it one by one.

It is often more convenient to provide a template for bootargs, with
U-Boot doing the substitution from other environment variables.

Add a way to substitute strings in the bootargs variable. This allows
things like "rootdev=${rootdev}" to be used in bootargs, with the
${rootdev} substitution providing the UUID of the root device.

For example, to substitute the GUID of the kernel partition:

  setenv bootargs "console=/dev/ttyS0 rootdev=${uuid}/PARTNROFF=1
		kern_guid=${uuid}"
  part uuid mmc 2:2 uuid
  bootm

This is particularly useful when the command line from another place. For
example, Chrome OS stores the command line next to the kernel itself. It
depends on the kernel version being used as well as the hardware features,
so it is extremely difficult to devise a U-Boot script that works on all
boards and kernel versions. With this feature, the command line can be
read from disk and used directly, with a few substitutions set up.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 19:48:29 -05:00
Simon Glass
4448fe8e4e bootm: Allow updating the bootargs in a buffer
At present we only support updating the 'bootargs' environment
variable. Add another function to update a buffer instead. This will
allow zimage to use this feature.

Also add a lot more tests to cover various cases.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Simon Glass
b3c01678fd bootm: Update bootm_process_cmdline_env() to use flags
At present only one transformation is supported: making the Linux console
silent. To prepare for adding more, convert the boolean parameter into a
flag value.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Simon Glass
d9477a0a4d bootm: Add a bool parameter to bootm_process_cmdline_env()
This function will soon do more than just handle the 'silent linux'
feature. As a first step, update it to take a boolean parameter,
indicating whether or not the processing is required.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Simon Glass
4dcb81545a bootm: Rename fixup_silent_linux()
We want to add more processing to this function. Before doing so, rename
it to bootm_process_cmdline_env(), which is more generic.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Simon Glass
4ae42643d0 bootm: Update fixup_silent_linux() to return an error
At present this function fails silently on error. Update it to produce
an error code. Report this error to the user and abort the boot, since it
likely will prevent a successful start.

No tests are added at this stage, since additional refactoring is taking
place in subsequent patches.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Simon Glass
f158ba15ee bootm: Add tests for fixup_silent_linux()
This function currently has no tests. Export it so that we can implement
a simple test on sandbox. Use IS_ENABLED() to remove the unused code,
instead #ifdef.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-04 16:09:26 -05:00
Heinrich Schuchardt
73fdb9558e bootm: add {arch,board}_preboot_os() to bootm.h
Functions that are used in multiple C modules should be defined in an
include.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Michael Walle <michael@walle.cc>
2020-10-14 11:16:34 -04:00
Tero Kristo
fbde7589ce common: bootm: add checks to verify if ramdisk / fdtimage overlaps OS image
These cases are typically fatal and are difficult to debug for random
users. Add checks for detecting overlapping images and abort if overlap
is detected.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
2020-07-17 08:51:01 -04:00
Simon Glass
0914011310 command: Remove the cmd_tbl_t typedef
We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-18 18:36:55 -04:00
Julius Werner
2090854cd2 common: Move bootm_decomp_image() to image.c (as image_decomp())
Upcoming patches want to add decompression to use cases that are no
longer directly related to booting. It makes sense to retain a single
decompression routine, but it should no longer be in bootm.c (which is
not compiled for all configurations). This patch moves
bootm_decomp_image() to image.c and renames it to image_decomp() in
preparation of those upcoming patches.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
[trini: Fix warning around handle_decomp_error being unused]
Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-29 09:30:42 -04:00
Fabrice Fontaine
93e078807f Make FIT support really optional
Due to some mistakes in the source code, it was not possible to really
turn FIT support off. This commit fixes the problem by means of the
following changes:

- Enclose "bootm_host_load_image" and "bootm_host_load_images" between
  checks for CONFIG_FIT_SIGNATURE, in common/bootm.c.

- Enclose the declaration of "bootm_host_load_images" between checks for
  CONFIG_FIT_SIGNATURE, in common/bootm.h.

- Condition the compilation and linking of fit_common.o fit_image.o
  image-host.o common/image-fit.o to CONFIG_FIT=y, in tools/Makefile.

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
[fabio: adapt for 2016.07]
Signed-off-by: Fabio Estevam <festevam@gmail.com>
[Ricardo: fix conditional compilation and linking of the files mentioned above
for 2016.07]
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
[Jörg: adapt for 2019.01]
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
[Retrieved from:
https://git.buildroot.net/buildroot/tree/package/uboot-tools/0003-Make-FIT-support-really-optional.patch]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
2019-05-09 19:52:55 -04:00
Heinrich Schuchardt
f6c6df7ebc efi_loader: refactor switch to non-secure mode
Refactor the switch from supervisor to hypervisor to a new function called
at the beginning of do_bootefi().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
2019-02-13 09:40:06 +01:00
Bin Meng
f2a53c7665 bootm: vxworks: Make do_bootm_vxworks() non-static
For future extension to other architectures, make do_bootm_vxworks()
a non-static function.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2018-12-31 08:08:51 -05:00
Simon Glass
896019b18b Add a comment for board_quiesce_devices()
This exported function should have a comment describing what it does. Also
it should really be removed in favour of device_remove(), which handles
this sort of thing now. Add a comment with a TODO.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2018-06-03 15:27:21 +02:00
Simon Glass
329da4850c Define board_quiesce_devices() in a shared location
This undocumented function relies on arch-specific code to declare a nop
weak version. Add the weak function in common code instead to avoid having
to duplicate the same function in each arch.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2018-06-03 15:27:21 +02:00
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
Karl Apsite
d52e8575d9 Combine bootm_find_<thing> functions together
bootm_find_ramdisk_fdt() renamed to bootm_find_images() for readability.

The function bootm_find_ramdisk_fdt() appears to be a simple wrapper for
bootm_find_ramdisk(), bootm_find_fdt(), and now bootm_find_loadables().
I didn't see any other callers entering a bootm_find<thing>, so removing
the wrapper, and condensing these together hopefully makes the code a
little simpler.

Signed-off-by: Karl Apsite <Karl.Apsite@dornerworks.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-05-28 08:18:21 -04:00
Simon Glass
081cc19747 bootm: Export bootm_decomp_image()
Export this function for testing. Also add a parameter so that values other
than CONFIG_SYS_BOOTM_LEN can be used for the maximum uncompressed size.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-14 11:35:43 -05:00
Jeroen Hofstee
f1bd871ad1 bootm: add prototype for arch_preboot_os
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
2014-10-25 15:27:36 -04:00
Tom Rini
d2b2ffe310 cmd_bootm.c: Add 'booti' for ARM64 Linux kernel Images
The default format for arm64 Linux kernels is the "Image" format,
described in Documentation/arm64/booting.txt.  This, along with an
optional gzip compression on top is all that is generated by default.
The Image format has a magic number within the header for verification,
a text_offset where the Image must be run from, an image_size that
includes the BSS and reserved fields.

This does not support automatic detection of a gzip compressed image.

Signed-off-by: Tom Rini <trini@ti.com>
2014-08-30 07:46:41 -04:00
Simon Glass
ce1400f694 Enhance fit_check_sign to check all images
At present this tool only checks the configuration signing. Have it also
look at each of the images in the configuration and confirm that they
verify.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de> (v1)
2014-06-19 11:19:02 -04:00
Simon Glass
b639640371 bootm: Split out code from cmd_bootm.c
This file has code in three different categories:
- Command processing
- OS-specific boot code
- Locating images and setting up to boot

Only the first category really belongs in a file called cmd_bootm.c.

Leave the command processing code where it is. Split out the OS-specific
boot code into bootm_os.c. Split out the other code into bootm.c

Header files and extern declarations are tidied but otherwise no code
changes are made, to make it easier to review.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-06-19 11:18:58 -04:00