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UPSTREAM: lib/cbmem: allow anyone to use cbmem_possibly_online()

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The cbmem_possibly_online() is a helpful construct. Therefore,
push it into cbmem.h so other users can take advantage of it.

BUG=chrome-os-partner:60592
BRANCH=reef
TEST=None

Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17868
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

Change-Id: If5a1c7815ed03874dcf141014b8ffefb82b7cc92
Reviewed-on: https://chromium-review.googlesource.com/421027
Commit-Ready: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aaron Durbin 2016-12-14 14:40:43 -06:00 • committed by chrome-bot
commit d3937f59c3
2 changed files with 17 additions and 16 deletions
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16
src/include/cbmem.h
View file

@ -158,4 +158,20 @@ void set_top_of_ram(uint64_t ramtop);
void backup_top_of_ram(uint64_t ramtop);
#endif
/*
* Returns 0 for the stages where we know that cbmem does not come online.
* Even if this function returns 1 for romstage, depending upon the point in
* bootup, cbmem might not actually be online.
*/
static inline int cbmem_possibly_online(void)
{
if (ENV_BOOTBLOCK)
return 0;
if (ENV_VERSTAGE && IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK))
return 0;
return 1;
}
#endif /* _CBMEM_H_ */