From: Igor Opaniuk igor.opaniuk@toradex.com
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/freescale/imx8mm_evk/imx8mm_evk.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/board/freescale/imx8mm_evk/imx8mm_evk.c b/board/freescale/imx8mm_evk/imx8mm_evk.c index c5fd940eeb..53ebb949df 100644 --- a/board/freescale/imx8mm_evk/imx8mm_evk.c +++ b/board/freescale/imx8mm_evk/imx8mm_evk.c @@ -15,7 +15,11 @@ DECLARE_GLOBAL_DATA_PTR;
int dram_init(void) { - gd->ram_size = 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; }