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imx8mm_evk: 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 12:28:19 +02:00 committed by Stefano Babic
parent f8ae0bc7c2
commit 47d430baed
1 changed files with 5 additions and 1 deletions
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6
board/freescale/imx8mm_evk/imx8mm_evk.c
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@ -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;
}