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| author | Ying-Chun Liu (PaulLiu) <paulliu@debian.org> | 2021-08-23 10:43:06 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2021-10-07 16:53:50 +0200 |
| commit | 5a6af8c19ab8c9a7dd44db9406b68fcb7fe5ee18 (patch) | |
| tree | 94c5ef573d6a13c7527f489a9957cdb705d5fe0e /arch | |
| parent | 0cf5622998542f63943f03d041009a9997cea04f (diff) | |
| download | u-boot-5a6af8c19ab8c9a7dd44db9406b68fcb7fe5ee18.zip u-boot-5a6af8c19ab8c9a7dd44db9406b68fcb7fe5ee18.tar.gz u-boot-5a6af8c19ab8c9a7dd44db9406b68fcb7fe5ee18.tar.bz2 | |
imx8m: Restrict usable memory based on rom_pointer[0]
When TEE is loaded, we need to restrict the memory usage based
on rom_pointer[0]
Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Frieder Schrempf <frieder.schrempf@kontron.de>
Cc: uboot-imx <uboot-imx@nxp.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-imx/imx8m/soc.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index f2ddc83..8635087 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) |