u-boot.git/arch/arm/include/asm/global_data.h, branch v2023.07

arm64: Use level-2 for largest block mappings when FEAT_HAFDBS is present

2023-04-25T19:31:27Z

In order to make invalidation by VA more efficient, set the largest block mapping to 2MB, mapping it onto level-2. This has no material impact on u-boot's runtime performance, and allows a huge speedup when cleaning the cache. Signed-off-by: Marc Zyngier [ Paul: pick from the Android tree. Rebase to the upstream ] Signed-off-by: Ying-Chun Liu (PaulLiu) Cc: Tom Rini Link: https://android.googlesource.com/platform/external/u-boot/+/417a73581a72ff6d6ee4b0938117b8a23e32f7e8

arm64: Use FEAT_HAFDBS to track dirty pages when available

2023-04-25T19:31:27Z

Some recent arm64 cores have a facility that allows the page table walker to track the dirty state of a page. This makes it really efficient to perform CMOs by VA as we only need to look at dirty pages. Signed-off-by: Marc Zyngier [ Paul: pick from the Android tree. Rebase to the upstream ] Signed-off-by: Ying-Chun Liu (PaulLiu) Cc: Tom Rini Link: https://android.googlesource.com/platform/external/u-boot/+/3c433724e6f830a6b2edd5ec3d4a504794887263

imx: imx8ulp: Adjust handshake to sync TRDC and XRDC completion

2023-03-29T18:15:42Z

To fit the DBD_EN fused part, we re-design the TRDC and XRDC assignment. M33 will be the TRDC owner and needs to configure TRDC. A35 is the XRDC owner, ATF will configure XRDC. The handshake between U-boot and M33 image is used to sync TRDC and XRDC configuration completion. Once the handshake is done, A35 and M33 can access the allowed resources in others domain. The handshake is needed when M33 is booted or DBD_EN fused, because both cases will enable the TRDC. If handshake is timeout, the boot will hang. We use SIM GPR0 to pass the info from SPL to u-boot, because before the handshake, u-boot can't access SEC SIM and FSB. Signed-off-by: Ye Li Reviewed-by: Jacky Bai

global: Move remaining CONFIG_SYS_* to CFG_SYS_*

2022-12-05T21:06:08Z

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini Reviewed-by: Simon Glass

Makefile: Allow LTO to be disabled for a build

2022-09-02T20:20:11Z

LTO (Link-Time Optimisation) is an very useful feature which can significantly reduce the size of U-Boot binaries. So far it has been made available for selected ARM boards and sandbox. However, incremental builds are much slower when LTO is used. For example, an incremental build of sandbox takes 2.1 seconds on my machine, but 6.7 seconds with LTO enabled. Add a NO_LTO parameter to the build, similar to NO_SDL, so it can be disabled during development if needed, for faster builds. Add some documentation about LTO while we are here. Signed-off-by: Simon Glass

imx: imx9: Get the chip revision through S400 API

2022-07-26T09:29:01Z

Update the get chip revision methond to use S400 API, also record other information like lifecycle and UID to global data. Signed-off-by: Peng Fan

misc: imx: S400_API: Move S400 MU and API to a common place

2022-07-26T09:29:00Z

Since iMX9 uses S401 which shares the API with iMX8ULP. So move S400 MU driver and API to a common place and selected by CONFIG_IMX_SENTINEL Signed-off-by: Ye Li Signed-off-by: Peng Fan

driver: misc: Add MU and S400 API to communicate with Sentinel

2021-08-09T12:46:50Z

Add MU driver and S400 API. Need enable MISC driver to work Signed-off-by: Ye Li

global_data: Ensure we have when symbols are not in Kconfig yet

2021-06-23T12:45:03Z

All symbols that are defined in Kconfig will always be defined (or not) prior to preprocessing due to the -include directive while building. However, symbols which are not yet migrated will only be defined (or not) once the board config.h is included, via . While the end goal must be to migrate all symbols, today we have cases where the size of gd will get mismatched within the build, based on include order. Mitigate this by making sure that any that uses symbols not in Kconfig does start with . Remove this when not needed. Cc: Alexey Brodkin Cc: Eugeniy Paltsev Cc: Huan Wang Cc: Angelo Dureghello Cc: Rick Chen Signed-off-by: Tom Rini

ARM: make gd a function call for LTO and set via set_gd()

2021-05-24T18:21:30Z

On ARM, the gd pointer is stored in registers r9 / x18. For this the -ffixed-r9 / -ffixed-x18 flag is used when compiling, but using global register variables causes errors when building with LTO, and these errors are very difficult to overcome. Richard Biener says [1]: Note that global register vars shouldn't be used with LTO and if they are restricted to just a few compilation units the recommended fix is to build those CUs without -flto. We cannot do this for U-Boot since all CUs use -ffixed-reg flag. It seems that with LTO we could in fact store the gd pointer differently and gain performance or size benefit by allowing the compiler to use r9 / x18. But this would need more work. So for now, when building with LTO, go the clang way, and instead of declaring gd a global register variable, we make it a function call via macro. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68384 Signed-off-by: Marek Behún Reviewed-by: Simon Glass