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]>

3 files changed, 51 insertions, 0 deletions

diff --git a/include/smbios.h b/include/smbios.h
index 752a25250d3..293d6795cf3 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -309,6 +309,24 @@ struct __packed smbios_type9 {
 	char eos[SMBIOS_STRUCT_EOS_BYTES];
 };
 
+enum {
+	SMBIOS_MEM_NONE = 0,
+	SMBIOS_MEM_CUSTOM = 1,
+	SMBIOS_MEM_FDT_MEM_NODE = 2,
+	SMBIOS_MEM_FDT_MEMCON_NODE = 3
+};
+
+struct __packed smbios_type16 {
+	struct smbios_header hdr;
+	u8 location;
+	u8 use;
+	u8 mem_err_corr;
+	u32 max_cap;
+	u16 mem_err_info_hdl;
+	u16 num_of_mem_dev;
+	u64 ext_max_cap;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
 struct __packed smbios_type32 {
 	u8 type;
 	u8 length;
diff --git a/include/smbios_def.h b/include/smbios_def.h
index ef9cb02ed25..c6850a5d6f5 100644
--- a/include/smbios_def.h
+++ b/include/smbios_def.h
@@ -280,4 +280,33 @@
 /* Slot segment group number */
 #define SMBIOS_SYSSLOT_SGGNUM_UND	0
 
+/* Physical Memory Array */
+
+/* Location */
+#define SMBIOS_MA_LOCATION_OTHER	1
+#define SMBIOS_MA_LOCATION_UNKNOWN	2
+#define SMBIOS_MA_LOCATION_MOTHERBOARD	3
+
+/* Use */
+#define SMBIOS_MA_USE_OTHER		1
+#define SMBIOS_MA_USE_UNKNOWN		2
+#define SMBIOS_MA_USE_SYSTEM		3
+#define SMBIOS_MA_USE_VIDEO		4
+#define SMBIOS_MA_USE_FLASH		5
+#define SMBIOS_MA_USE_NVRAM		6
+#define SMBIOS_MA_USE_CACHE		7
+
+/* Error Correction Type */
+#define SMBIOS_MA_ERRCORR_OTHER		1
+#define SMBIOS_MA_ERRCORR_UNKNOWN	2
+#define SMBIOS_MA_ERRCORR_NONE		3
+#define SMBIOS_MA_ERRCORR_PARITY	4
+#define SMBIOS_MA_ERRCORR_SBITECC	5
+#define SMBIOS_MA_ERRCORR_MBITECC	6
+#define SMBIOS_MA_ERRCORR_CRC		7
+
+/* Error Information Handle */
+#define SMBIOS_MA_ERRINFO_NONE		0xFFFE
+#define SMBIOS_MA_ERRINFO_NOERR		0xFFFF
+
 #endif /* _SMBIOS_DEF_H_ */
diff --git a/include/sysinfo.h b/include/sysinfo.h
index e87cf969fcd..54eb64a204a 100644
--- a/include/sysinfo.h
+++ b/include/sysinfo.h
@@ -12,6 +12,7 @@
 struct udevice;
 
 #define SYSINFO_CACHE_LVL_MAX 3
+#define SYSINFO_MEM_HANDLE_MAX 8
 
 /*
  * This uclass encapsulates hardware methods to gather information about a
@@ -149,6 +150,9 @@ enum sysinfo_id {
 	SYSID_SM_CACHE_INFO_END =
 		SYSID_SM_CACHE_INST_SIZE2 + SYSINFO_CACHE_LVL_MAX - 1,
 
+	/* Memory Array (Type 16) */
+	SYSID_SM_MEMARRAY_HANDLE,
+
 	/* For show_board_info() */
 	SYSID_BOARD_MODEL,
 	SYSID_BOARD_MANUFACTURER,