[U-Boot] [PATCH 00/10] sunxi: Add basic PSCI support to enable SMP on the A80's first cluster

[Hans de Goede]

Hi,

On 09-11-16 11:21, Chen-Yu Tsai wrote:
> Hi everyone,
>
> This series adds basic PSCI support for the A80 to enable SMP on the
> first cluster. This at least allows people to use more than one core.
> The term "basic" is used because the series does not add support for
> multi-cluster cache and power management.
>
> The PSCI code is based on existing code for all the single cluster
> SoCs, and the kernel patches for MCPM SMP I did some time ago.
>
> Unfortunately only SMP works at this time. The last patch does not
> actually work. While the system is indeed booted non-secure, tested
> by trying to write to secure SRAM and the results not sticking, reads
> from the GIC CPU interface shows that it's still returning the secure
> copy of registers, and since we use a secure monitor FIQ to do core
> power down, the FIQ gets passed to the kernel. The patch is included
> so people with in-depth ARM knowledge could probably help work out
> what is wrong.

Cools stuff, when I find some time I will review and merge
patches 1-9 to sunxi-next.

First a question though, do you see any chance that merging this might
get in the way of enabling support for both clusters in the future?

Since the interface between u-boot and the kernel here is well defined
(and outside our control) I guess in the worst case, we would need to
revert some bits of this series from u-boot if they turn out to be non
suitable, right?

Regards,

Hans



>
>
> Regards
> ChenYu
>
> Chen-Yu Tsai (10):
>   ARM: PSCI: Set ARMV7_PSCI_NR_CPUS default to 8 for sun9i/A80
>   sunxi: Add CCI-400 and CPUCFG registers base address for sun9i/A80
>   sunxi: Add base address of secure SRAM B for sun9i/A80
>   sunxi: Use secure SRAM B for secure RAM for sun9i/A80
>   sunxi: Add PRCM register definition for sun9i/A80
>   sunxi: Add CPUCFG register definitions for sun9i/A80
>   sunxi: Add support for TZPC on sun9i/A80
>   sunxi: Add basic PSCI implementation for A80
>   sunxi: Enable PSCI on sun9i/A80
>   sunxi: Add PSCI core power off support for A80's first cluster
>
>  arch/arm/cpu/armv7/Kconfig                     |   1 +
>  arch/arm/cpu/armv7/sunxi/Makefile              |   5 +
>  arch/arm/cpu/armv7/sunxi/psci-mcpm.c           | 322 +++++++++++++++++++++++++
>  arch/arm/cpu/armv7/sunxi/tzpc.c                |   6 +
>  arch/arm/include/asm/arch-sunxi/cpu_sun9i.h    |   5 +
>  arch/arm/include/asm/arch-sunxi/cpucfg_sun9i.h |  51 ++++
>  arch/arm/include/asm/arch-sunxi/prcm_sun9i.h   |  55 +++++
>  arch/arm/include/asm/arch-sunxi/tzpc.h         |   4 +
>  arch/arm/mach-sunxi/board.c                    |   3 +-
>  board/sunxi/Kconfig                            |   4 +
>  include/configs/sun9i.h                        |   4 +
>  11 files changed, 459 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/cpu/armv7/sunxi/psci-mcpm.c
>  create mode 100644 arch/arm/include/asm/arch-sunxi/cpucfg_sun9i.h
>  create mode 100644 arch/arm/include/asm/arch-sunxi/prcm_sun9i.h
>