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verdin-imx8mm: adjust dram size in case bl32 is used

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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>
This commit is contained in:
Igor Opaniuk
2020-03-27 12:28:18 +02:00
committed by Stefano Babic
parent 168fff26a8
commit f8ae0bc7c2
1 changed files with 6 additions and 1 deletions
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7
board/toradex/verdin-imx8mm/verdin-imx8mm.c
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@@ -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;
}