smbios: add support for dynamic generation of Type 16 table

This commit implements SMBIOS Type 16 (Physical Memory Array)
generation with a hybrid approach supporting both:

1. Explicit definition via Device Tree 'smbios' node:
   Child node under '/smbios/smbios/memory-array' will be used to
   populate as individual Type 16 structure directly.
   - Properties follow SMBIOS field names with lowercase letters and
     hyphen-separated words (e.g., 'memory-error-correction',
     'maximum-capacity', 'extended-maximum-capacity', etc.).
   - This method supports precise platform-defined overrides and system
     descriptions.

2. Fallback to automatic DT-based discovery:
   If child node under '/smbios/smbios/memory-array' does not exist,
   the implementation will:
   - Scan all top-level 'memory@' nodes to populate Type 16 structure with
     inferred size and location data.
   - Scan nodes named or marked as 'memory-controller' and parse
     associated 'dimm@' subnodes (if present) to extract DIMM sizes and
     map them accordingly.

This dual-mode support enables flexible firmware SMBIOS reporting while
aligning with spec-compliant naming and runtime-detected memory topology.

Type 16 support is under GENERATE_SMBIOS_TABLE_VERBOSE to avoid
increasing rom size for those platforms which only require basic SMBIOS
support.

Signed-off-by: Raymond Mao <[email protected]>
Tested-by: Ilias Apalodimas <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/sysinfo/smbios.c b/drivers/sysinfo/smbios.c
index 99104274f72..ff5873c940e 100644
--- a/drivers/sysinfo/smbios.c
+++ b/drivers/sysinfo/smbios.c
@@ -24,6 +24,7 @@ struct sysinfo_plat_priv {
 	struct smbios_type7 t7[SYSINFO_CACHE_LVL_MAX];
 	u16 cache_handles[SYSINFO_CACHE_LVL_MAX];
 	u8 cache_level;
+	u16 marray_handles[SYSINFO_MEM_HANDLE_MAX];
 };
 
 static void smbios_cache_info_dump(struct smbios_type7 *cache_info)
@@ -165,6 +166,10 @@ static int sysinfo_plat_get_data(struct udevice *dev, int id, void **buf,
 		*buf = &priv->cache_handles[0];
 		*size = sizeof(priv->cache_handles);
 		break;
+	case SYSID_SM_MEMARRAY_HANDLE:
+		*buf = &priv->marray_handles[0];
+		*size = sizeof(priv->marray_handles);
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}