[PATCH V3 0/5] SMP support for Armada XP

Gregory CLEMENT gregory.clement at free-electrons.com
Wed Nov 14 17:20:32 EST 2012


The purpose of this patch set is to add the SMP support for the Armada
XP SoCs. Beside the SMP support itself brought by the last 3 patches,
this patch set also adds the support for the coherency fabric unit and
the power management service unit.

The coherency fabric is responsible for ensuring hardware coherency
between all CPUs and between CPUs and I/O masters. This unit is also
available for Armada 370 and will be used in an incoming patch set
for hardware I/O cache coherency.

The power management service unit is responsible for powering down and
waking up CPUs and other SOC units.

The original code is from Yehuda Yitschak, it was reworked by myself
and reviewed by Yehuda.

This patch set is based on 3.7-rc5 and depends one the framework clock
support which should be being included in the marvell branch
maintained by Jason Cooper. The git branch called
ArmadaXP-SMP-for-3.8-V3 is also available at

V2 -> V3:
- Rebased on to v3.7-rc5
- removed the unnecessary used of __iomem flag for a pointer to a
  function. the second parameter of armada_xp_boot_cpu is now just a
  void *.
- removed the dsb() call in armada_xp_boot_cpu(), as the following
  writel calls dsb if needed.
- Change the PJ4B mask for proc_info in arch/arm/mm/proc-v7.S to be
  less restrictive, the last 4 bits contain revision information
- Merge the multiple 'or' instruction in a single instruction in

V1 -> V2:
- Rebased on to v3.7-rc3
- Fixed typos found by Alexandre Belloni
- Added clk_prepare_enable() before getting rate clk in
- Add explanation in the binding documentation about the per-CPU
  interrupt registers: the address of the virtual register must be
- Removed the armada_xp prefix in the coherency.c file to be more
  compliant with the name convention of the other files.
- Coherency_init is now called from armada_370_xp_dt_init() and is no
  more an early_init() call. As the device tree is not available from
  an early_init(), it was useless to call coherency_init() so
  early. The need to be able to call some function very early during
  the boot were already resolved by using the hard code address of the

Yehuda Yitschak (5):
  arm: mvebu: Added support for coherency fabric in mach-mvebu
  arm: mvebu: Added initial support for power managmement service unit
  arm: mvebu: Added IPI support via doorbells
  arm: mm: Added support for PJ4B cpu and init routines
  arm: mvebu: Added SMP support for Armada XP

 .../devicetree/bindings/arm/armada-370-xp-mpic.txt |   12 +-
 .../devicetree/bindings/arm/armada-370-xp-pmsu.txt |   20 ++++
 .../devicetree/bindings/arm/coherency-fabric.txt   |   16 +++
 arch/arm/boot/dts/armada-370-xp.dtsi               |    5 +
 arch/arm/boot/dts/armada-xp.dtsi                   |   12 +-
 arch/arm/configs/mvebu_defconfig                   |    3 +
 arch/arm/mach-mvebu/Kconfig                        |    3 +-
 arch/arm/mach-mvebu/Makefile                       |    4 +-
 arch/arm/mach-mvebu/armada-370-xp.c                |    3 +
 arch/arm/mach-mvebu/armada-370-xp.h                |   10 ++
 arch/arm/mach-mvebu/coherency.c                    |   89 ++++++++++++++
 arch/arm/mach-mvebu/coherency.h                    |   24 ++++
 arch/arm/mach-mvebu/common.h                       |    6 +
 arch/arm/mach-mvebu/headsmp.S                      |   66 +++++++++++
 arch/arm/mach-mvebu/hotplug.c                      |   30 +++++
 arch/arm/mach-mvebu/irq-armada-370-xp.c            |   92 ++++++++++++++-
 arch/arm/mach-mvebu/platsmp.c                      |  124 ++++++++++++++++++++
 arch/arm/mach-mvebu/pmsu.c                         |   75 ++++++++++++
 arch/arm/mach-mvebu/pmsu.h                         |   16 +++
 arch/arm/mm/Kconfig                                |    4 +
 arch/arm/mm/proc-v7.S                              |   51 ++++++++
 21 files changed, 653 insertions(+), 12 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/armada-370-xp-pmsu.txt
 create mode 100644 Documentation/devicetree/bindings/arm/coherency-fabric.txt
 create mode 100644 arch/arm/mach-mvebu/coherency.c
 create mode 100644 arch/arm/mach-mvebu/coherency.h
 create mode 100644 arch/arm/mach-mvebu/headsmp.S
 create mode 100644 arch/arm/mach-mvebu/hotplug.c
 create mode 100644 arch/arm/mach-mvebu/platsmp.c
 create mode 100644 arch/arm/mach-mvebu/pmsu.c
 create mode 100644 arch/arm/mach-mvebu/pmsu.h


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