[PATCH] rockchip: rk3568: Include all addressable DRAM in memory map

Jonas Karlman jonas at kwiboo.se
Thu Jan 29 20:31:50 CET 2026


Rockchip RK356x supports up to 8 GiB DRAM, however U-Boot only includes
the initial 4 GiB in its memory map, something that matches gd->ram_top
and current expected memory available for use in U-Boot.

Add the remaining 4-8 GiB range to the memory map to more correctly
describe available and addressable DRAM of RK356x. While at it also add
the missing UL suffix to the PCIe address range for consistency.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 arch/arm/mach-rockchip/rk3568/rk3568.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-rockchip/rk3568/rk3568.c b/arch/arm/mach-rockchip/rk3568/rk3568.c
index c2b96902d2dd..2b1eafee37c9 100644
--- a/arch/arm/mach-rockchip/rk3568/rk3568.c
+++ b/arch/arm/mach-rockchip/rk3568/rk3568.c
@@ -72,9 +72,15 @@ static struct mm_region rk3568_mem_map[] = {
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
 	}, {
-		.virt = 0x300000000,
-		.phys = 0x300000000,
-		.size = 0x0c0c00000,
+		.virt = 0x100000000UL,
+		.phys = 0x100000000UL,
+		.size = 0x100000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x300000000UL,
+		.phys = 0x300000000UL,
+		.size = 0x0c0c00000UL,
 		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
 			 PTE_BLOCK_NON_SHARE |
 			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
-- 
2.52.0



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