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2019-07-09ubispl: add support for loading volumes by nameHamish Guthrie1-0/+6
The motivation is to use the UBI atomic volume rename functionality to allow double copy software updates on UBI. To that end the SPL is configured to always load the same volume name (e.g. "u-boot"), whereas a software updater always installs into the secondary volume "u-boot_r". After successful installation, these two volume names are switched. This extension is protected by #ifdefs as it will somewhat slow down loading of volumes by id. This is because the code needs to disable the optimization of ignoring all volume ids which are not to-be-loaded, since these can only be resolved after attaching. This adds two vtbl related functions from Linux, which are taken from the same kernel version as the current main U-Boot UBI code (Linux 4.2 64291f7db5bd8). Signed-off-by: Hamish Guthrie <hamish.guthrie@kistler.com> Signed-off-by: Markus Klotzbuecher <markus.klotzbuecher@kistler.com> Reviewed-by: Heiko Schocher <hs@denx.de> Cc: Kyungmin Park <kmpark@infradead.org>
2018-05-07SPDX: Convert all of our multiple license tags to Linux Kernel styleTom Rini1-2/+1
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 multiple licenses (in these cases, dual license) declared in the SPDX-License-Identifier tag. In this case we change from listing "LICENSE-A LICENSE-B" or "LICENSE-A or LICENSE-B" or "(LICENSE-A OR LICENSE-B)" to "LICENSE-A OR LICENSE-B" as per the Linux Kernel style document. Note that parenthesis are allowed so when they were used before we continue to use them. Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Tom Rini <trini@konsulko.com>
2016-07-22spl: Lightweight UBI and UBI fastmap supportThomas Gleixner1-0/+90
Booting a payload out of NAND FLASH from the SPL is a crux today, as it requires hard partioned FLASH. Not a brilliant idea with the reliability of todays NAND FLASH chips. The upstream UBI + UBI fastmap implementation which is about to brought to u-boot is too heavy weight for SPLs as it provides way more functionality than needed for a SPL and does not even fit into the restricted SPL areas which are loaded from the SoC boot ROM. So this provides a fast and lightweight implementation of UBI scanning and UBI fastmap attach. The scan and logical to physical block mapping code is developed from scratch, while the fastmap implementation is lifted from the linux kernel source and stripped down to fit the SPL needs. The text foot print on the board which I used for development is: 6854 0 0 6854 1abd drivers/mtd/ubispl/built-in.o Attaching a NAND chip with 4096 physical eraseblocks (4 blocks are reserved for the SPL) takes: In full scan mode: 1172ms In fastmap mode: 95ms The code requires quite some storage. The largest and unknown part of it is the number of fastmap blocks to read. Therefor the data structure is not put into the BSS. The code requires a pointer to free memory handed in which is initialized by the UBI attach code itself. See doc/README.ubispl for further information on how to use it. This shares the ubi-media.h and crc32 implementation of drivers/mtd/ubi There is no way to share the fastmap code, as UBISPL only utilizes the slightly modified functions ubi_attach_fastmap() and ubi_scan_fastmap() from the original kernel ubi fastmap implementation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Acked-by: Heiko Schocher <hs@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com>