[U-Boot] [PATCH 3/8] sun8i: Extend stack size to allow for up to 8 CPUs

[Chen-Yu Tsai]

Hi,

On Tue, May 17, 2016 at 10:38 AM,  <tpearson at raptorengineering.com> wrote:
> ---
>  arch/arm/cpu/armv7/psci.S             | 1 +
>  arch/arm/cpu/armv7/sunxi/psci_sun6i.S | 4 ++--
>  arch/arm/cpu/armv7/sunxi/psci_sun7i.S | 4 ++--
>  3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
> index 87c0c0b..18a0cc2 100644
> --- a/arch/arm/cpu/armv7/psci.S
> +++ b/arch/arm/cpu/armv7/psci.S
> @@ -203,6 +203,7 @@ ENTRY(psci_get_cpu_stack_top)
>         add     r5, r5, #0x2000                 @ Skip two pages
>         lsr     r5, r5, #12                     @ Align to start of page

Why not just change this line instead?

ChenYu

>         lsl     r5, r5, #12
> +       add     r5, r5, #0x1000                 @ Skip an additional page
>         sub     r5, r5, #4                      @ reserve 1 word for target PC
>         sub     r0, r5, r0                      @ here's our stack!
>
> diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S b/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
> index 90b5bfd..d35b63e 100644
> --- a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
> +++ b/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
> @@ -32,8 +32,8 @@
>   *     ._secure_text section
>   * text_end to ALIGN_PAGE(text_end):
>   *     nothing
> - * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x1000)
> - *     1kB of stack per CPU (4 CPUs max).
> + * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x2000)
> + *     1kB of stack per CPU (8 CPUs max).
>   */
>
>         .pushsection ._secure.text, "ax"
> diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
> index e15d587..b8ac50e 100644
> --- a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
> +++ b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
> @@ -32,8 +32,8 @@
>   *     ._secure_text section
>   * text_end to ALIGN_PAGE(text_end):
>   *     nothing
> - * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x1000)
> - *     1kB of stack per CPU (4 CPUs max).
> + * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x2000)
> + *     1kB of stack per CPU (8 CPUs max).
>   */
>
>         .pushsection ._secure.text, "ax"
> --
> 2.8.0.rc3
>
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