sdm845: Add DRAM resources

TEST=build

Change-Id: Icf934caf8b4584ef2633054a5cc7f5be7cc734ee
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Reviewed-on: https://review.coreboot.org/25212
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/soc/qualcomm/sdm845/include/soc/memlayout.ld

@@ -46,7 +46,9 @@ SECTIONS
 	REGION(pmic, 0x14976000, 0xA000, 4096)
 	BSRAM_END(0x14980000)
 
-	DRAM_START(0x90000000)
-	POSTRAM_CBFS_CACHE(0x90000000, 384K)
-	RAMSTAGE(0x90800000, 128K)
+	DRAM_START(0x80000000)
+	/* Various hardware/software subsystems make use of this area */
+	REGION(dram_reserved, 0x85000000, 0x1A800000, 4096)
+	POSTRAM_CBFS_CACHE(0x9F800000, 384K)
+	RAMSTAGE(0x9F860000, 128K)
 }

src/soc/qualcomm/sdm845/include/soc/mmu.h

@@ -16,6 +16,8 @@
 #ifndef _SOC_QUALCOMM_SDM845_MMU_H__
 #define _SOC_QUALCOMM_SDM845_MMU_H__
 
+#define DRAMSIZE4GB 0x100000000
+
 void sdm845_mmu_init(void);
 
 #endif  // _SOC_QUALCOMM_SDM845_MMU_H_

src/soc/qualcomm/sdm845/include/soc/symbols.h

@@ -26,4 +26,8 @@ extern u8 _bsram[];
 extern u8 _ebsram[];
 #define _bsram_size (_ebsram - _bsram)
 
+extern u8 _dram_reserved[];
+extern u8 _edram_reserved[];
+#define _dram_reserved_size (_edram_reserved - _dram_reserved)
+
 #endif // _SOC_QUALCOMM_SDM845_SYMBOLS_H_

src/soc/qualcomm/sdm845/soc.c

@@ -13,12 +13,17 @@
  * GNU General Public License for more details.
  */
 
+#include <symbols.h>
 #include <device/device.h>
 #include <timestamp.h>
+#include <soc/mmu.h>
+#include <soc/symbols.h>
 
 static void soc_read_resources(device_t dev)
 {
-
+	ram_resource(dev, 0, (uintptr_t)_dram / KiB, DRAMSIZE4GB / KiB);
+	reserved_ram_resource(dev, 1, (uintptr_t)_dram_reserved / KiB,
+				_dram_reserved_size / KiB);
 }
 
 static void soc_init(device_t dev)