Merge patch series "global_data: Reduce size of struct global_data"

Simon Glass <sjg@chromium.org> says:

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

1 files changed, 1 insertions, 0 deletions

diff --git a/include/env_internal.h b/include/env_internal.h
index 0a267e35592..c1c0727e4d0 100644
--- a/include/env_internal.h
+++ b/include/env_internal.h
@@ -100,6 +100,7 @@ extern const char default_environment[];
 #include <env_flags.h>
 #include <search.h>
 
+/* this is stored as bits in gd->env_has_init so is limited to 16 entries */
 enum env_location {
 	ENVL_UNKNOWN,
 	ENVL_EEPROM,