Hello everyone,
This is a V4 of my series that adds SMP support for Allwinner sun8i-a83t.
Based on sunxi's tree, sunxi/for-next branch.
Changes since v3:
- Take into account Maxime's reviews:
- split the first patch into 4 new patches: add sun9i device tree
parsing, rename some variables, add a83t support and finally,
add hotplug support.
- Move the code of previous patch 07 (to disable CPU0 disabling)
into hotplug support patch (see patch 04)
- Remove the patch that added PRCM register because it is already
available. Because of that, update the device tree parsing to use
"sun8i-a83t-r-ccu".
- Use a variable to know which SoC we currently have
- Take into account Chen-Yu's reviews: create two iounmap functions
to release the resources of the device tree parsing.
- Take into account Marc's review: Update the code to initialize CNTVOFF
register. As there is already assembly code in the driver, I decided
to create an assembly file not to mix assembly and C code.
For that, I create 3 new patches: move the current assembly code that
handles the cluster cache enabling into a file, move the cpu_resume entry
in this file and finally, add a new assembly entry to initialize the timer
offset for boot CPU and secondary CPUs.
Changes since v2:
- Rebased my modifications according to new Chen Yu's patch series
that adds SMP support for sun9i-a80 (without MCPM).
- Split the device-tree patches into 3 patches for CPUCFG, R_CPUCFG
and PRCM registers for more visibility.
- The hotplug of CPU0 is currently not working (even after trying what
Allwinner's code is doing) so remove the possibility of disabling
this CPU. Created a new patch for it.
Changes since v1:
- Add Chen Yu's patch in my series (see path 01)
- Add new compatibles for prcm and cpucfg registers for sun8i-a83t.
Create two functions to separate the DT parsing of sun9i-a80 and
sun8i-a83t.
- Thanks to Maxime's review: order device tree's nodes according
to physical addresses, remove unused label and fix registers' sizes.
Update the commit log and commit title of my last patch (see
patch 05).
Patch 01: Create a function that handles all the current code doing a
device tree parsing.
Patch 02: Rename a register to prepare the a83t support with different
registers.
Patch 03: Convert the sunxi SMP driver to add support for A83T.
This SoC has a bit flip that needs to be handled.
Patch 04: Add hotplug support for a83t. Remove the possibilite to
disable the CPU0 because CPU0 hotplug is currently not working for
this SoC.
Patch 05-06: Add registers nodes (cpucfg and r_cpucfg) needed
for SMP bringup.
Patch 07: Add CCI-400 node for a83t.
Patch 08: Move the current assembly code into an assembly file
Patch 09: Move another assemble code (for resuming) into this file
Patch 10: Add a new entry to initialize the timer offset for all CPUs.
If you have any remarks/questions, let me know.
Thank you in advance,
Mylène
Mylène Josserand (10):
ARM: sun9i: smp: Add sun9i dt parsing function
ARM: sun9i: smp: Rename clusters's power-off register
ARM: sun8i: smp: Add support for A83T
ARM: sun8i: smp: Add hotplug support for sun8i-a83t
ARM: dts: sun8i: Add CPUCFG device node for A83T dtsi
ARM: dts: sun8i: Add R_CPUCFG device node for the A83T dtsi
ARM: dts: sun8i: a83t: Add CCI-400 node
ARM: sunxi: smp: Move assembly code into a file
ARM: sunxi: smp: Move cpu_resume assembly entry into file
ARM: sunxi: smp: Add initialization of CNTVOFF
arch/arm/boot/dts/sun8i-a83t.dtsi | 51 ++++++
arch/arm/mach-sunxi/Kconfig | 2 +-
arch/arm/mach-sunxi/Makefile | 1 +
arch/arm/mach-sunxi/headsmp.S | 99 +++++++++++
arch/arm/mach-sunxi/mc_smp.c | 350 ++++++++++++++++++++++++--------------
arch/arm/mach-sunxi/sunxi.c | 4 +
6 files changed, 383 insertions(+), 124 deletions(-)
create mode 100644 arch/arm/mach-sunxi/headsmp.S
--
2.11.0
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