[v7 07/18] arm: socfpga: Add secure register access helper functions for SoC 64bits

[Tan, Ley Foon]

> -----Original Message-----
> From: Lim, Elly Siew Chin <elly.siew.chin.lim at intel.com>
> Sent: Thursday, December 24, 2020 6:21 PM
> To: u-boot at lists.denx.de
> Cc: Marek Vasut <marex at denx.de>; Tan, Ley Foon
> <ley.foon.tan at intel.com>; See, Chin Liang <chin.liang.see at intel.com>;
> Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>; Chee, Tien Fong
> <tien.fong.chee at intel.com>; Westergreen, Dalon
> <dalon.westergreen at intel.com>; Simon Glass <sjg at chromium.org>; Gan,
> Yau Wai <yau.wai.gan at intel.com>; Lim, Elly Siew Chin
> <elly.siew.chin.lim at intel.com>
> Subject: [v7 07/18] arm: socfpga: Add secure register access helper functions
> for SoC 64bits
> 
> These secure register access functions allow U-Boot proper running at EL2
> (non-secure) to access System Manager's secure registers by calling the ATF's
> PSCI runtime services (EL3/secure).
> 
> Signed-off-by: Siew Chin Lim <elly.siew.chin.lim at intel.com>
> 
> ---
> v5
> ---
> Return error code instead of hang the system if fail to access the secure
> register.
> 
> ---
> v6
> ---
> Directly return 'ret' after SMC call in write and update function.
> 
> ---
> v7
> ---
> Simplify the code to "return invoke_smc(..." in write and update function.
> ---
>  arch/arm/mach-socfpga/Makefile                     |  1 +
>  .../mach-socfpga/include/mach/secure_reg_helper.h  | 19 +++++
>  arch/arm/mach-socfpga/secure_reg_helper.c          | 89

Reviewed-by: Ley Foon Tan <ley.foon.tan at intel.com>
 
Regards
Ley Foon