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| author | Tom Rini <[email protected]> | 2022-10-07 11:23:19 -0400 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-10-07 11:23:19 -0400 |
| commit | 5c3801df300e28fc59bc66fde9b5ba488b6bdd9a (patch) | |
| tree | 8a49c5cdd61cd29a2ee0f3b015d26c43a45fef9d /doc/develop | |
| parent | 2afa989fbecf25ea23902a9c480f179ba608785a (diff) | |
| parent | 2a6218369c9bddf143682a4cceb4d65bf3a9166d (diff) | |
Merge branch '2022-10-06-assorted-platform-and-board-updates'
- Assorted platform updates for developerbox, armv8 platforms in
general, TI K3 and AM65 platforms, nuvoton NPCM845 SoC and then clock
driver, ftgpio010 support, and common/board_f cleanups.
Diffstat (limited to 'doc/develop')
| -rw-r--r-- | doc/develop/global_data.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/develop/global_data.rst b/doc/develop/global_data.rst index 2ac893de491..d143f27eedd 100644 --- a/doc/develop/global_data.rst +++ b/doc/develop/global_data.rst @@ -36,6 +36,11 @@ On most architectures the global data pointer is stored in a register. The sandbox, x86_64, and Xtensa are notable exceptions. +Current implementation uses a register for the GD pointer because this results +in smaller code. However, using plain global data for the GD pointer would be +possible too (and simpler, as it does not require the reservation of a specific +register for it), but the resulting code is bigger. + Clang for ARM does not support assigning a global register. When using Clang gd is defined as an inline function using assembly code. This adds a few bytes to the code size. |