AT32: say RAM size

firmware/console/eficonsole.cpp

@@ -94,6 +94,7 @@ static void sayHello() {
 		(mcuSerId == 0x0d) ? "AT32F435" : ((mcuSerId == 0x0e) ? "AT32F437" : "UNKNOWN"),
 		'A' + mcuRevision);
 	efiPrintf("MCU F_SIZE %d KB", flashSize);
+	efiPrintf("MCU RAM %d KB", at32GetRamSizeKb());
 #else
 #define MCU_REVISION_MASK  0xfff
 	int mcuRevision = DBGMCU->IDCODE & MCU_REVISION_MASK;

firmware/hw_layer/ports/at32/at32_common.cpp

@@ -65,3 +65,31 @@ int at32GetMcuType(uint32_t id, const char **pn, const char **package, uint32_t
     /* unknown */
     return -1;
 }
+
+int at32GetRamSizeKb(void)
+{
+    uint8_t EOPB0 = *(__IO uint16_t *) (0x1FFFC010);
+    /* TODO: check inverted value */
+
+    switch ((*(__IO uint16_t *) (FLASHSIZE_BASE))) {
+    case 256:
+        EOPB0 &= 0x03;
+        if (EOPB0 == 3)
+            EOPB0 = 2;
+        return 512 - (64 * EOPB0);
+    case 448:
+        EOPB0 &= 0x07;
+        if (EOPB0 > 5)
+            EOPB0 = 5;
+        return 512 - (64 * EOPB0);
+    case 1024:
+    case 4032:
+        EOPB0 &= 0x07;
+        if (EOPB0 > 6)
+            EOPB0 = 6;
+        return 512 - (64 * EOPB0);
+    default:
+        return 0;
+    }
+    return 0;
+}

firmware/hw_layer/ports/mpu_util.h

@@ -78,6 +78,7 @@ BOR_Result_t BOR_Set(BOR_Level_t BORValue);
 
 #ifdef AT32F4XX
 int at32GetMcuType(uint32_t id, const char **pn, const char **package, uint32_t *flashSize);
+int at32GetRamSizeKb(void);
 #endif
 
 extern "C"