This series implements a cpuidle driver for systems built around the MIPS Coherent Processing System (CPS) architecture - that is, systems with a Coherence Manager, Global Interrupt Controller & for CM>=2 a Cluster Power Controller. The first 5 patches provide some infrastructure used to save context across states where CPUs lose power. In this series that is the cpuidle power gated idle state, but in future may also include suspend to RAM. Patches 6 to 11 ensure that clockevent devices are used appropriately allowing CPUs to switch to using tick broadcasts when necessary. Patches 12 to 16 provide various small things for use by later patches in the series. Patches 17 to 25 provide access to a few new instructions via uasm for use by later patches in the series. Patches 26 to 29 make changes to smp-cps in preparation for supporting hotplug & the power gated idle state. Patch 30 introduces code to generate entry points for the various idle states available in the system. Patch 31 makes use of that to implement support for hotplug, powering down cores where possible. Patches 32 to 34 make things a little more foolproof by ensuring that multi-core SMP is not attempted with an unsuitable (non-coherent) CCA, and by setting a suitable CCA by default. Patches 35 & 36 are general infrastructure for supporting cpuidle drivers for the MIPS architecture. Patch 37 allows access to the struct cpuidle_device per-CPU variable defined in generic cpuidle code. Patch 38 adds a cpuidle driver for MIPS CPS systems, making use of the infrastructure added earlier in the series. Finally patch 39 enables the CONFIG_MIPS_CPS SMP implementation by default on Malta, in place of the older & deprecated CONFIG_MIPS_CMP. James Hogan (5): MIPS: PM: Add CPU PM callbacks for general CPU context MIPS: traps: Add CPU PM callback for trap configuration MIPS: c-r4k: Add CPU PM callback for coherency MIPS: tlb-r4k: Add CPU PM callback to reconfigure TLB MIPS: PM: Implement PM helper macros Paul Burton (34): MIPS: mark GIC clockevent device with CLOCK_EVT_FEAT_C3STOP MIPS: allow GIC clockevent device config from other CPUs MIPS: mark R4K clockevent device with CLOCK_EVT_FEAT_C3STOP MIPS: mark R4K clockevent device with CLOCK_EVT_FEAT_PERCPU MIPS: allow R4K clockevent device to function regardless of GIC MIPS: support for generic clockevents broadcast MIPS: introduce cpu_coherent_mask MIPS: CPC: provide functions to retrieve register addresses MIPS: CPC: provide locking functions MIPS: add kmap_noncoherent to wire a cached non-coherent TLB entry MIPS: MT: define write_c0_tchalt macro MIPS: inst.h: define COP0 wait op MIPS: inst.h: define MT yield op MIPS: inst.h: define microMIPS sync op MIPS: inst.h: define microMIPS wait op MIPS: uasm: add a label variant of beq MIPS: uasm: add jalr instruction MIPS: uasm: add sync instruction MIPS: uasm: add wait instruction MIPS: uasm: add MT ASE yield instruction MIPS: smp-cps: rework core/VPE initialisation MIPS: smp-cps: function to determine whether CPS SMP is in use MIPS: smp-cps: flush cache after patching mips_cps_core_entry MIPS: smp-cps: use CPC core-other locking MIPS: pm-cps: add PM state entry code for CPS systems MIPS: smp-cps: hotplug support MIPS: smp-cps: prevent multi-core SMP with unsuitable CCA MIPS: smp-cps: set a coherent default CCA MIPS: smp-cps: duplicate core0 CCA on secondary cores MIPS: cpuidle wait instruction state MIPS: include cpuidle Kconfig menu cpuidle: declare cpuidle_dev in cpuidle.h cpuidle: cpuidle-cps: add MIPS CPS cpuidle driver MIPS: Malta: CPS SMP by default arch/mips/Kconfig | 15 +- arch/mips/configs/maltasmvp_defconfig | 3 +- arch/mips/configs/maltasmvp_eva_defconfig | 3 +- arch/mips/include/asm/cacheflush.h | 6 + arch/mips/include/asm/gic.h | 1 + arch/mips/include/asm/idle.h | 14 + arch/mips/include/asm/mips-cpc.h | 34 +- arch/mips/include/asm/mipsmtregs.h | 2 + arch/mips/include/asm/mmu_context.h | 10 +- arch/mips/include/asm/pgtable.h | 2 + arch/mips/include/asm/pm-cps.h | 51 +++ arch/mips/include/asm/pm.h | 167 +++++++ arch/mips/include/asm/smp-cps.h | 19 +- arch/mips/include/asm/smp.h | 3 + arch/mips/include/asm/uasm.h | 9 + arch/mips/include/uapi/asm/inst.h | 26 +- arch/mips/kernel/Makefile | 3 + arch/mips/kernel/asm-offsets.c | 29 +- arch/mips/kernel/cevt-gic.c | 5 +- arch/mips/kernel/cevt-r4k.c | 10 +- arch/mips/kernel/cps-vec.S | 328 +++++++++++++- arch/mips/kernel/idle.c | 11 + arch/mips/kernel/irq-gic.c | 15 + arch/mips/kernel/mips-cpc.c | 28 ++ arch/mips/kernel/pm-cps.c | 705 ++++++++++++++++++++++++++++++ arch/mips/kernel/pm.c | 99 +++++ arch/mips/kernel/smp-cps.c | 426 +++++++++++------- arch/mips/kernel/smp-gic.c | 11 + arch/mips/kernel/smp.c | 47 ++ arch/mips/kernel/traps.c | 93 +++- arch/mips/mm/c-r4k.c | 24 + arch/mips/mm/init.c | 14 +- arch/mips/mm/tlb-r4k.c | 34 +- arch/mips/mm/uasm-micromips.c | 2 + arch/mips/mm/uasm-mips.c | 4 + arch/mips/mm/uasm.c | 31 +- drivers/cpuidle/Kconfig | 5 + drivers/cpuidle/Kconfig.mips | 17 + drivers/cpuidle/Makefile | 4 + drivers/cpuidle/cpuidle-cps.c | 186 ++++++++ include/linux/cpuidle.h | 1 + 41 files changed, 2261 insertions(+), 236 deletions(-) create mode 100644 arch/mips/include/asm/pm-cps.h create mode 100644 arch/mips/include/asm/pm.h create mode 100644 arch/mips/kernel/pm-cps.c create mode 100644 arch/mips/kernel/pm.c create mode 100644 drivers/cpuidle/Kconfig.mips create mode 100644 drivers/cpuidle/cpuidle-cps.c -- 1.8.5.3
