[PATCH v2 06/13] verdin-imx8mm: adjust dram size in case bl32 is used

Igor Opaniuk
2020-03-27T10:28:18Z

Adjust DRAM size in case BL32 secure payload is loaded (OP-TEE/Trusty),
so during MMU initialization U-Boot won't touch this mem area.

BL32 is loaded to the end of DRAM, bl32 payload size is read from
rom_pointer[1]. This relates to the issue described in
59efa6b52b("imx8m: Fix MMU table issue for OPTEE memory").

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

board/toradex/verdin-imx8mm/verdin-imx8mm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/board/toradex/verdin-imx8mm/verdin-imx8mm.c b/board/toradex/verdin-imx8mm/verdin-imx8mm.c
index 16b9fa1ec1..cb9b4e3b0a 100644
--- a/board/toradex/verdin-imx8mm/verdin-imx8mm.c
+++ b/board/toradex/verdin-imx8mm/verdin-imx8mm.c
@@ -5,6 +5,7 @@

#include <common.h>
#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <miiphy.h>
#include <netdev.h>
@@ -13,7 +14,11 @@ DECLARE_GLOBAL_DATA_PTR;

int dram_init(void)
{
- gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
+ /* rom_pointer[1] contains the size of TEE occupies */
+ if (rom_pointer[1])
+ gd->ram_size = PHYS_SDRAM_SIZE - rom_pointer[1];
+ else
+ gd->ram_size = PHYS_SDRAM_SIZE;

return 0;
}
--
2.17.1