[PATCH v3] spl: introduce SPL_XIP to config

[Rick Chen]

> From: Nikita Shubin <nikita.shubin at maquefel.me>
> Sent: Friday, September 02, 2022 4:48 PM
> To: u-boot at lists.denx.de
> Cc: linux at yadro.com; Sean Anderson <seanga2 at gmail.com>; Rick Chen <rickchen36 at gmail.com>; Nikita Shubin <n.shubin at yadro.com>; Rick Jian-Zhi Chen(陳建志) <rick at andestech.com>; Leo Yu-Chi Liang(梁育齊) <ycliang at andestech.com>; Simon Glass <sjg at chromium.org>; Bin Meng <bmeng.cn at gmail.com>; Ilias Apalodimas <ilias.apalodimas at linaro.org>; Heinrich Schuchardt <xypron.glpk at gmx.de>
> Subject: [PATCH v3] spl: introduce SPL_XIP to config
>
> From: Nikita Shubin <n.shubin at yadro.com>
>
> U-Boot and SPL don't necessary share the same location, so we might end with U-Boot SPL in read-only memory (XIP) and U-Boot in read-write memory.
>
> In case of non XIP boot mode, we rely on such variables as "hart_lottery"
> and "available_harts_lock" which we use as atomics.
>
> The problem is that CONFIG_XIP also propagate to main U-Boot, not only SPL, so we need CONFIG_SPL_XIP to distinguish SPL XIP from other XIP modes.
>
> This adds an option special for SPL to behave it in XIP manner and we don't use hart_lottery and available_harts_lock, during start proccess.
>
> Signed-off-by: Nikita Shubin <n.shubin at yadro.com>
> ---
> v2->v3:
> Rick Chen:
>         - move SPL_XIP to arch/riscv/Kconfig right after XIP
>         - change ae350_spl defconfig's to use SPL_XIP instead of XIP
> ---
>  arch/riscv/Kconfig                   | 7 +++++++
>  arch/riscv/cpu/cpu.c                 | 2 +-
>  arch/riscv/cpu/start.S               | 4 ++--
>  arch/riscv/include/asm/global_data.h | 2 +-
>  arch/riscv/lib/asm-offsets.c         | 2 +-
>  arch/riscv/lib/smp.c                 | 2 +-
>  configs/ae350_rv32_spl_xip_defconfig | 2 +-  configs/ae350_rv64_spl_xip_defconfig | 2 +-
>  8 files changed, 15 insertions(+), 8 deletions(-)

Reviewed-by: Rick Chen <rick at andestech.com>