diff options
author | Tom Rini <trini@konsulko.com> | 2022-01-29 13:50:19 -0500 |
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committer | Tom Rini <trini@konsulko.com> | 2022-01-29 13:50:19 -0500 |
commit | c7d042f315d89ab2f0122920829f18a8f8897a05 (patch) | |
tree | 380446358ad24e2ed24e1696d898b019d82eb6cd /doc/board | |
parent | 98a90b2730696c1ba773359b7944f6685ae13344 (diff) | |
parent | 5ee900c14ff57b8c9201d7d42f018b33df3ea42a (diff) | |
download | u-boot-WIP/29Jan2022.zip u-boot-WIP/29Jan2022.tar.gz u-boot-WIP/29Jan2022.tar.bz2 |
Merge tag 'efi-2022-04-rc1-3' of https://source.denx.de/u-boot/custodians/u-boot-efiWIP/29Jan2022
Pull request for efi-2022-04-rc1-3
Documentation:
* update Nokia RX-51 documentation and move it to rst
* describe boot switch settings for HiFive Unmatched board
UEFI:
* fix the checking of images hashes and signatures
* provide the RISCV_EFI_BOOT_PROTOCOL
Diffstat (limited to 'doc/board')
-rw-r--r-- | doc/board/index.rst | 1 | ||||
-rw-r--r-- | doc/board/nokia/index.rst | 9 | ||||
-rw-r--r-- | doc/board/nokia/rx51.rst | 162 | ||||
-rw-r--r-- | doc/board/sifive/unmatched.rst | 7 |
4 files changed, 177 insertions, 2 deletions
diff --git a/doc/board/index.rst b/doc/board/index.rst index 5607e1f..75c34c4 100644 --- a/doc/board/index.rst +++ b/doc/board/index.rst @@ -22,6 +22,7 @@ Board-specific doc intel/index kontron/index microchip/index + nokia/index nxp/index openpiton/index qualcomm/index diff --git a/doc/board/nokia/index.rst b/doc/board/nokia/index.rst new file mode 100644 index 0000000..b68c3c6 --- /dev/null +++ b/doc/board/nokia/index.rst @@ -0,0 +1,9 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +Nokia +===== + +.. toctree:: + :maxdepth: 2 + + rx51 diff --git a/doc/board/nokia/rx51.rst b/doc/board/nokia/rx51.rst new file mode 100644 index 0000000..941f78e --- /dev/null +++ b/doc/board/nokia/rx51.rst @@ -0,0 +1,162 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +Nokia RX-51 aka N900 +==================== + +The ``nokia_rx51_defconfig`` configuration file results in a ``u-boot.bin`` +which can be chainloaded by the Nokia second stage bootloader (NOLO) in QEMU or +on a real N900. It does very little hardware configuration because NOLO has +already configured the board. It is only needed to enable the internal eMMC +memory via the twl4030 regulator which is not enabled by NOLO. + +NOLO is expecting a kernel image and will treat any image it finds in +OneNAND as such. This u-boot is intended to be flashed to the N900 like +a kernel. In order to transparently boot the original kernel, it will be +appended to ``u-boot.bin`` at 0x40000. NOLO will load the entire image into +(random) memory and execute U-Boot, which saves hardware revision, boot reason +and boot mode ATAGs set by NOLO. Then the bootscripts will attempt to load +``uImage``, ``zImage`` or ``boot.scr`` file from a FAT or ext2/3/4 filesystem +on external SD card or internal eMMC memory. If this fails or keyboard is +closed then the appended kernel image will be booted using some generated +and some stored ATAGs (see boot order). + +For generating combined image of U-Boot and kernel (either in uImage or zImage +format) there is a simple script called ``u-boot-gen-combined``. It is available +in following repository: https://github.com/pali/u-boot-maemo. + +To generate the ``combined.bin`` image from ``u-boot.bin`` and ``kernel.bin`` +(in either uImage or zImage format) use: + +.. code-block:: bash + + sh u-boot-gen-combined u-boot.bin kernel.bin combined.bin + +The original Maemo Fremantle PR1.3 zImage kernel binary is available at: +http://repository.maemo.org/pool/maemo5.0/free/k/kernel/kernel_2.6.28-20103103+0m5_armel.deb + +To unpack it (from DEB/AR, TAR and FIASCO) execute the following commands: + +.. code-block:: bash + + ar x kernel_2.6.28-20103103+0m5_armel.deb data.tar.gz + tar -O -xf data.tar.gz ./boot/zImage-2.6.28-20103103+0m5.fiasco > kernel_2.6.28-20103103+0m5.fiasco + 0xFFFF -M kernel_2.6.28-20103103+0m5.fiasco -u + +The flashed image must start with a 2 KiB ``NOLO!img`` header which contains +size of the image. The header consists of the bytes +``NOLO!img\x02\x00\x00\x00\x00\x00\x00\x00`` followed by the 4 byte little +endian size of the image. The rest of the 2 KiB header just contains zero bytes. + +The Nokia proprietary flasher and also the open source 0xFFFF flasher +automatically prepend the required ``NOLO!img`` header and both applications +expect that the image does not contain a ``NOLO!img`` header. Adding a +``NOLO!img`` header is required only in case of using the ``nandwrite`` tool for +flashing. + +The open source 0xFFFF flasher is available in the following repository: +https://github.com/pali/0xFFFF + +It is possible to load ``u-boot.bin`` via USB to the N900 RAM and boot it +without needing to flash it. This is done via 0xFFFF running on the host PC: + +.. code-block:: bash + + 0xFFFF -m u-boot.bin -l -b + +0xFFFF also supports flashing a kernel image either via USB or directly on +N900 device. Flashing u-boot/kernel/combined image is done as: + +.. code-block:: bash + + 0xFFFF -m combined.bin -f + +Via 0xFFFF it is also possible to generate a standard flashable image in +Nokia FIASCO format which contains metadata information like device +identification (RX-51) and version string (v2021.04): + +.. code-block:: bash + + 0xFFFF -m RX-51:v2021.04:kernel:u-boot.bin -g u-boot.fiasco + +There is support for the hardware watchdog. The hardware watchdog is started by +NOLO so U-Boot must reset the watchdog to prevent rebooting the device (but not +very often, max every 2 seconds). There is also support for framebuffer display +output with ANSI escape codes and the N900 hardware keyboard input. + +When U-Boot is starting it sets the IBE bit in the Auxiliary Control Register, +which is needed for Thumb-2 ISA support. This is a workaround for erratum +430973. + +Default boot order +------------------ + +0. if keyboard is closed boot automatically attached kernel image +1. try boot from external SD card +2. try boot from internal eMMC memory +3. try boot from attached kernel image + +Boot from SD or eMMC in this order: + +1. boot from FAT partition + + a. find ``boot.scr`` on first FAT partition + b. find ``uImage`` on first FAT partition + c. find ``zImage`` on first FAT partition + d. same order for 2nd - 4th FAT partition + +2. same as 1. but for ext2/3/4 partition + +Available additional commands/variables +--------------------------------------- + +* run sdboot - Boot from external SD card (see boot order) +* run emmcboot - Boot from internal eMMC memory (see boot order) +* run attachboot - Boot attached kernel image (attached to U-Boot binary) + +\ + +* run scriptload - Load boot script ``${mmcscriptfile}`` +* run scriptboot - Run loaded boot script +* run kernload - Load kernel image ``${mmckernfile}`` +* run initrdload - Load initrd image ``${mmcinitrdfile}`` +* run kernboot - Boot loaded kernel image +* run kerninitrdboot - Boot loaded kernel image with loaded initrd image + +\ + +* run trymmcscriptboot - Try to load and boot script ``${mmcscriptfile}`` +* run trymmckernboot - Try to load and boot kernel image ``${mmckernfile}`` +* run trymmckerninitrdboot - Try to load and boot kernel image ``${mmckernfile}`` + with initrd image ``${mmcinitrdfile}`` + +Additional variables for loading files from mmc +----------------------------------------------- + +* mmc ``${mmcnum}`` (0 - external, 1 - internal) +* partition number ``${mmcpart}`` (1 - 4) +* partition type ``${mmctype}`` (fat, ext2, ext4; ext2 is just alias for ext4) + +Additional variables for booting a kernel +----------------------------------------- + +* ``setup_omap_atag`` - Add OMAP table into atags structure (needed for maemo kernel) +* ``setup_console_atag`` - Enable serial console in OMAP table +* ``setup_boot_reason_atag`` - Change boot reason in OMAP table +* ``setup_boot_mode_atag`` - Change boot mode in OMAP table + +Variable ``setup_omap_atag`` is automatically set when booting attached kernel. +When variable ``setup_omap_atag`` is set, variable ``setup_console_atag`` is unset +and u-boot standard output is set to serial then ``setup_console_atag`` is +automatically set to 1. So output from Maemo kernel would go to serial port. + +UBIFS support +------------- + +UBIFS support is disabled, because U-Boot image is too big and cannot be +flashed with attached kernel image to RX-51 kernel nand area. For enabling +UBIFS support add following lines into file ``configs/nokia_rx51_defconfig``:: + + CONFIG_CMD_UBI=y + CONFIG_CMD_UBIFS=y + CONFIG_MTD_UBI_FASTMAP=y + CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT=1 diff --git a/doc/board/sifive/unmatched.rst b/doc/board/sifive/unmatched.rst index b52a1f6..24a8899 100644 --- a/doc/board/sifive/unmatched.rst +++ b/doc/board/sifive/unmatched.rst @@ -20,8 +20,11 @@ The support for following drivers are already enabled: 4. SiFive SPI Driver. 5. MMC SPI Driver for MMC/SD support. -Booting from uSD using U-Boot SPL ---------------------------------- +Booting from micro SD card using U-Boot SPL +------------------------------------------- + +Booting from an SD card requires that the boot mode selection DIP switches +MSEL[3:0] are set to 1011. Building -------- |