On 23.08.21 04:43, Ying-Chun Liu wrote:
> From: "Ying-Chun Liu (PaulLiu)" <paul...@debian.org>
>
> When TEE is loaded, we need to restrict the memory usage based
> on rom_pointer[0]
>
> Signed-off-by: Ying-Chun Liu (PaulLiu) <paul...@debian.org>
> Cc: Fabio Estevam <feste...@denx.de>
> Cc: Frieder Schrempf <frieder.schre...@kontron.de>
> Cc: uboot-imx <uboot-...@nxp.com>
Reviewed-by: Frieder Schrempf <frieder.schre...@kontron.de>
> ---
> arch/arm/mach-imx/imx8m/soc.c | 16 +++++++++++++---
> 1 file changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
> index f2ddc834d4..863508776d 100644
> --- a/arch/arm/mach-imx/imx8m/soc.c
> +++ b/arch/arm/mach-imx/imx8m/soc.c
> @@ -298,16 +298,26 @@ phys_size_t get_effective_memsize(void)
>
> ulong board_get_usable_ram_top(ulong total_size)
> {
> + ulong top_addr = PHYS_SDRAM + gd->ram_size;
> +
> /*
> * Some IPs have their accessible address space restricted by
> * the interconnect. Let's make sure U-Boot only ever uses the
> * space below the 4G address boundary (which is 3GiB big),
> * even when the effective available memory is bigger.
> */
> - if (PHYS_SDRAM + gd->ram_size > 0x80000000)
> - return 0x80000000;
> + if (top_addr > 0x80000000)
> + top_addr = 0x80000000;
> +
> + /*
> + * rom_pointer[0] stores the TEE memory start address.
> + * rom_pointer[1] stores the size TEE uses.
> + * We need to reserve the memory region for TEE.
> + */
> + if (rom_pointer[0] && rom_pointer[1] && top_addr > rom_pointer[0])
> + top_addr = rom_pointer[0];
>
> - return PHYS_SDRAM + gd->ram_size;
> + return top_addr;
> }
>
> static u32 get_cpu_variant_type(u32 type)
>
