diff options
| author | Marek Vasut <[email protected]> | 2022-04-14 15:51:46 +0200 |
|---|---|---|
| committer | Stefano Babic <[email protected]> | 2022-04-21 14:38:03 +0200 |
| commit | 74f88b72219e178dc05d8c81e21048212b04cd09 (patch) | |
| tree | 26b4b5f31723067405c6d823368697ffc9623cc0 | |
| parent | 2e26a76eb0e2b80c3118267f065af0db58db654c (diff) | |
ARM: imx: imx8m: Fix board_get_usable_ram_top()
The 4 GiB boundary is at 0xffffffff+1 , not at 0x80000000, fix this.
The PHYS_SDRAM of i.MX8M is at 0x40000000 , so to restrict ram_top
below 4 GiB, the ram_top has to be set to 0xffffffff as it is not
an offset from the start of PHYS_SDRAM, but rather a physical address
marking the topmost allowed DRAM address.
Fixes: e27bddff4b9 ("imx8m: Restrict usable memory to space below 4G boundary")
Signed-off-by: Marek Vasut <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: Frieder Schrempf <[email protected]>
Cc: Peng Fan <[email protected]>
Cc: Stefano Babic <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
Reviewed-by: Frieder Schrempf <[email protected]>
| -rw-r--r-- | arch/arm/mach-imx/imx8m/soc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index 8171631db10..e7fe7c2fd88 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -331,7 +331,7 @@ phys_size_t get_effective_memsize(void) ulong board_get_usable_ram_top(ulong total_size) { - ulong top_addr = PHYS_SDRAM + gd->ram_size; + ulong top_addr; /* * Some IPs have their accessible address space restricted by @@ -339,8 +339,7 @@ ulong board_get_usable_ram_top(ulong total_size) * space below the 4G address boundary (which is 3GiB big), * even when the effective available memory is bigger. */ - if (top_addr > 0x80000000) - top_addr = 0x80000000; + top_addr = clamp_val((u64)PHYS_SDRAM + gd->ram_size, 0, 0xffffffff); /* * rom_pointer[0] stores the TEE memory start address. |