On Wed, Jul 24, 2024 at 09:08:47AM -0600, Simon Glass wrote: > The global data structure has grown quite a lot over the years, being > the best place to put an important pointer or something that must be > accessed before and after relocation. > > This series attempts to reduce the size a little, by moving some things > out and shrinking and aligning some fields. > > Some fields are needed during init but not afterwards. To deal with this > a new 'boardf' structure is created, which sits on the stack and is only > present during board_init_f(). It is possible that more fields could > move to this struct, but for now only 4 are moved. > > An assumption is made that an int is 32-bits wide on all architectures, > which seems to be true, but maintainers should be able to confirm. > > Mostly the code-size impact is neutral, but the patch > 'Use less space for environment fields' does increase U-Boot's size by > about 30 bytes on aarch64. > > For firefly-rk3399 (64-bit) the size of global reduces from 456 to 368 > bytes. For SPL it reduces from 416 to 272 bytes. > > There are other things which could be attempted, for example: > - Using hlist instead of list for some lists > - Checking that only necessary fields are present in SPL
This is good, thanks for doing this. I'm planning to grab this in to -next once I open it. -- Tom
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