2 files changed, 15 insertions, 0 deletions
diff --git a/src/soc/intel/icelake/include/soc/systemagent.h b/src/soc/intel/icelake/include/soc/systemagent.h
index 297ee5d56c..90465a248b 100644
--- a/src/soc/intel/icelake/include/soc/systemagent.h
+++ b/src/soc/intel/icelake/include/soc/systemagent.h
@@ -15,6 +15,7 @@
 #define  D_LCK		(1 << 4)
 #define  G_SMRAME	(1 << 3)
 #define  C_BASE_SEG	((0 << 2) | (1 << 1) | (0 << 0))
+#define CAPID0_A	0xe4
 
 #define BIOS_RESET_CPL		0x5da8
 #define EDRAMBAR		0x5408
diff --git a/src/soc/intel/icelake/systemagent.c b/src/soc/intel/icelake/systemagent.c
index ac96d81adf..c9fe0a97eb 100644
--- a/src/soc/intel/icelake/systemagent.c
+++ b/src/soc/intel/icelake/systemagent.c
@@ -52,3 +52,17 @@ void soc_systemagent_init(struct device *dev)
 	/* Enable BIOS Reset CPL */
 	enable_bios_reset_cpl();
 }
+
+uint32_t soc_systemagent_max_chan_capacity_mib(u8 capid0_a_ddrsz)
+{
+	switch (capid0_a_ddrsz) {
+	case 1:
+		return 8192;
+	case 2:
+		return 4096;
+	case 3:
+		return 2048;
+	default:
+		return 65536;
+	}
+}