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