[PATCH v2] arch: arm: mach-k3: Delete tifs node in DT fixup
Neha Malcom Francis
n-francis at ti.com
Wed Apr 26 11:26:50 CEST 2023
Hi Udit
On 20/04/23 13:41, Udit Kumar wrote:
> This patch deletes tifs DT node as part of fixup.
>
> TISCI API reported msmc_size, does not include
> 64KB reserved size for tifs aka MSMC comms memory.
>
> As part of fixup, original code uses TISCI API
> reported msmc_size as size for sram DT node.
>
> tifs node is similar to l3-cache, which should
> hold address above msms_size, and should be deleted
> before passing control to OS.
>
> Documentation
> https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/general/core.html?highlight=msmc#tisci-msg-query-msmc
>
> Signed-off-by: Udit Kumar <u-kumar1 at ti.com>
> ---
> Changes since v1:
> https://lore.kernel.org/all/20230419061352.3156023-1-u-kumar1@ti.com/
> - moved tifs check above l3 as
>
> arch/arm/mach-k3/common.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
> index a2adb791f6..33b1f10d58 100644
> --- a/arch/arm/mach-k3/common.c
> +++ b/arch/arm/mach-k3/common.c
> @@ -351,6 +351,7 @@ int fdt_fixup_msmc_ram(void *blob, char *parent_path, char *node_name)
> subnode, addr, size);
> if (addr + size > msmc_size ||
> !strncmp(fdt_get_name(blob, subnode, &len), "sysfw", 5) ||
> + !strncmp(fdt_get_name(blob, subnode, &len), "tifs", 4) ||
> !strncmp(fdt_get_name(blob, subnode, &len), "l3cache", 7)) {
> fdt_del_node(blob, subnode);
> debug("%s: deleting subnode %d\n", __func__, subnode);
Reviewed-by: Neha Malcom Francis <n-francis at ti.com>
I do have a general doubt; why do we have only atf-sram sub-node in
msmc_sram in all other devices (j721e, j7200 and am65) except j721s2?
--
Thanking You
Neha Malcom Francis
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