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libpayload: Add API to get physical memory size

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sysinfo contains both CBMEM_ID_MEMINFO and CBMEM_ID_MEM_CHIP.
This new function allows to easily retrieve the amount of memory the
system has based on the mentioned CBMEM entries structures.

BUG=b:450374306
TEST=Checked on Google/Brya/Omnigul (x86) - MEMINFO
TEST=Checked on Google/Rauru/Navi (ARM64) - MEM_CHIP

Change-Id: Iaf69c54dfb3d2eaffbccacee8bee3be425b78a3f
Signed-off-by: Jakub Czapiga <czapiga@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90430
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jakub Czapiga 2025-12-09 10:18:38 +00:00 • committed by Matt DeVillier
commit c109fc92ff
2 changed files with 29 additions and 0 deletions
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9
payloads/libpayload/include/libpayload.h
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@ -493,6 +493,15 @@ u8 *sha1(const u8 *data, size_t len, u8 *buf);
*/
int sysinfo_have_multiboot(unsigned long *addr);
/**
* Check CBMEM_ID_MEM_CHIP and CBMEM_ID_MEMINFO, extract physical memory size
* present in the system.
*
* @returns physical memory detected in the system or zero in case of failure
*/
size_t sysinfo_get_physical_memory_size_mib(void);
/** @} */
/**