[U-Boot] [PATCH v5 0/8] ARMv7: PSCI: add PSCI v1.0 support

[Chen-Yu Tsai <wens@csie.org>]

Hi,

On Tue, Jun 14, 2016 at 3:01 PM,  <macro.wave.z@gmail.com> wrote:
> From: Hongbo Zhang <hongbo.zhang@nxp.com>
>
> v5 changes:
> - Give up fixing the potential bug of PSCI stack overlap with secure text end
> when there is more CPUs in system. Because I just want to keep this series as
> simple as it could be: adding basic PSCI v1.0 support and adding more PSCI
> v1.0 implements of our platform.
> While too compplicated patches in assembly language won't call for effective
> reviews, even I think there is potential bug of PSCI stack, let's fix it in
> sepetated patch later.

I've done some patches fixing the stack allocation issue:

https://github.com/wens/u-boot-sunxi/commits/c-psci-part2

These patches are ready, but I want to add a secure data section still.
The data section will be for variables such as target PC, core/cluster
power status, context ID, etc.. IMHO this is better than putting stuff
at the top or bottom of the stack, and can also be referenced directly.

Regards
ChenYu

> - Move the patch of factoring out psci_cpu_on_common to earlier place 2/8, so
> that the following patches can only update the psci_cpu_on_common instead of
> touching each platform's psci_cpu_on, this reduces patches size obviously and
> make it easier for review.
>
> v4 changes:
> - since there is already PSCI v0.2 function IDs definition merged in 5a07abb,
> I give up my previous patches 1/11 and 2/11, and move previous 7/11 "ARMv7:
> PSCI: add PSCI v1.0 functions skeleton" as current first one 1/9
> - accept Andre's comment to add the missed "arm,psci-0,2" into compatible
> string
>
> v3 changes:
> - patch 3/11, re-init the stack pointer to address like start of page instead
> of page end, because for ARM push operation, the stack pointer is encreased
> before storing data.
> - patch 10/11, delete the previous un-implemented cpu_suspend function for ls1
> platform, because there is default blank functions for all those are not
> implemented in specific platform.
>
>
> v2 changes:
> - re-organize psci_cpu_on_common, this code should be called by each platform's
> psci_cpu_on, should not be a function calling each psci_cpu_on, all related
> functions are updated due to this change
> - update some registers usage, e.g. if r10 is used without push/pop, u-boot
> cannot launch rt-kernel
> - update some comments to be clearer, re-organize all patches for easier review
> - add patch to check already_on or on_pending for LS102XA
>
> This patch set contains two parts:
> ARMv7 PSCI common framework: fix some issues and add v1.0 support
> NXP (was Freescale) LS102XA: codes enhancement and add v1.0 implementation
> And this patch set was initially created by Dongsheng Wang.
>
> Hongbo Zhang (8):
>   ARMv7: PSCI: add PSCI v1.0 functions skeleton
>   ARMv7: PSCI: factor out reusable psci_cpu_on_common
>   ARMv7: PSCI: update the place of saving target PC
>   ARMv7: PSCI: add codes to save context ID for CPU_ON
>   ARMv7: PSCI: ls102xa: check target CPU ID before further operations
>   ARMv7: PSCI: ls102xa: check ALREADY_ON or ON_PENDING for CPU_ON
>   ARMv7: PSCI: ls102xa: add more PSCI v1.0 functions implemention
>   ARMv7: PSCI: ls102xa: move secure text section into OCRAM
>
>  arch/arm/cpu/armv7/ls102xa/psci.S          | 169 +++++++++++++++++++++++++++--
>  arch/arm/cpu/armv7/mx7/psci.S              |   5 +-
>  arch/arm/cpu/armv7/nonsec_virt.S           |   7 ++
>  arch/arm/cpu/armv7/psci.S                  |  99 ++++++++++++++++-
>  arch/arm/cpu/armv7/sunxi/psci_sun6i.S      |   5 +-
>  arch/arm/cpu/armv7/sunxi/psci_sun7i.S      |   5 +-
>  arch/arm/cpu/armv7/virt-dt.c               |  10 +-
>  arch/arm/include/asm/arch-ls102xa/config.h |   3 +-
>  arch/arm/include/asm/psci.h                |  31 ++++++
>  arch/arm/mach-tegra/psci.S                 |   5 +-
>  board/freescale/ls1021aqds/Makefile        |   1 +
>  board/freescale/ls1021aqds/psci.S          |  36 ++++++
>  board/freescale/ls1021atwr/Makefile        |   1 +
>  board/freescale/ls1021atwr/psci.S          |  28 +++++
>  include/configs/ls1021aqds.h               |   3 +
>  include/configs/ls1021atwr.h               |   3 +
>  16 files changed, 383 insertions(+), 28 deletions(-)
>  create mode 100644 board/freescale/ls1021aqds/psci.S
>  create mode 100644 board/freescale/ls1021atwr/psci.S
>
> --
> 2.1.4
>