Re: [linux-yocto] [PATCH 052/269] arch/arm: arm changes to support the axxia BSP
On 03/02/2018 12:46 PM, Daniel Dragomir wrote: From: Charlie Paul These files were changed to support the LSI axxia 5500 board. I'm finally looking at these, sorry for the delay. See some questions below. I have questions, since this commit log has no details. :D Signed-off-by: Charlie Paul Signed-off-by: John Jacques --- arch/arm/Kconfig | 84 ++- arch/arm/Kconfig.debug| 4 ++ arch/arm/Makefile | 2 +- arch/arm/include/asm/kmap_types.h | 5 +++ arch/arm/include/asm/spinlock.h | 6 +++ arch/arm/kernel/head.S| 8 arch/arm/kernel/irq.c | 2 +- arch/arm/kernel/perf_event_v7.c | 3 +- arch/arm/tools/mach-types | 1 + 9 files changed, 111 insertions(+), 4 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c0fcab6..0f6c9e0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -359,6 +359,29 @@ config ARM_SINGLE_ARMV7M select SPARSE_IRQ select USE_OF +config ARCH_AXXIA + bool "LSI Axxia family" + select ARCH_PHYS_ADDR_T_64BIT + select ARCH_DMA_ADDR_T_64BIT + select ARCH_WANT_OPTIONAL_GPIOLIB + select ARM_AMBA + select COMMON_CLK + select CLKDEV_LOOKUP + select CLKSRC_MMIO + select GENERIC_CLOCKEVENTS + select HAVE_CLK + select HAVE_PATA_PLATFORM + select ARM_TIMER_SP804 + select ICST + select NEED_MACH_IO_H + select ZONE_DMA + select PCI + select PCI_DOMAINS if PCI + select ARCH_SUPPORTS_MSI if PCI + select HAS_RAPIDIO + help + This enables support for the LSI Axxia boards. + config ARCH_EBSA110 bool "EBSA-110" select ARCH_USES_GETTIMEOFFSET @@ -839,6 +862,8 @@ source "arch/arm/mach-ux500/Kconfig" source "arch/arm/mach-versatile/Kconfig" +source "arch/arm/mach-axxia/Kconfig" + source "arch/arm/mach-vexpress/Kconfig" source "arch/arm/plat-versatile/Kconfig" @@ -1268,6 +1293,19 @@ source "drivers/pci/Kconfig" source "drivers/pcmcia/Kconfig" +config HAS_RAPIDIO + bool + default n + +config RAPIDIO + bool "RapidIO support" + depends on HAS_RAPIDIO || PCI Shouldn't this be an "&&", not an "||" ? This is going to get turned on for every config that has PCI, which from the HAS_RAPIDIO doesn't look to be the intent. + help + If you say Y here, the kernel will include drivers and + infrastructure code to support RapidIO interconnect devices. + +source "drivers/rapidio/Kconfig" + endmenu menu "Kernel Features" @@ -1438,12 +1476,46 @@ config NR_CPUS depends on SMP default "4" +menu "Support for hot-pluggable CPUs" + config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" - depends on SMP + depends on SMP && HOTPLUG I don't see why this is being changed. Depending on SMP should still be enough. help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. +choice + prompt "CPU Power Down Mode" + default HOTPLUG_CPU_COMPLETE_POWER_DOWN + help + This is used to select how the CPU is going to be powered down. If LOW POWER + is selected then the CPU enters a WFI state and waits for an interrupt to + wake up. If COMPLETE POWER down is selected the CPU power is turned off. The only + way to power on the CPU is to execute a command. + +config HOTPLUG_CPU_COMPLETE_POWER_DOWN + bool "Power off the CPU" + help + This will power off the CPU completely. The irqs are migrated + to another CPU. + +config HOTPLUG_CPU_LOW_POWER + bool "Low Power CPU (wfi)" + help + This will put the CPU into a low power mode wfi mode. When an interrupt + is received the CPU will power on again. + +endchoice + +config HOTPLUG_CPU_L2_POWER_DOWN + bool "Power Off L2 Cache" + depends on HOTPLUG_CPU_COMPLETE_POWER_DOWN + default n if HOTPLUG_CPU_LOW_POWER + help + Select this if you want to power down the L2 cache when + all CPUS of a cluster have been powered off. + +endmenu config ARM_PSCI bool "Support for the ARM Power State Coordination Interface (PSCI)" @@ -1456,6 +1528,16 @@ config ARM_PSCI 0022A ("Power State Coordination Interface System Software on ARM processors"). +config LOCAL_TIMERS + bool "Use local timer interrupts" + depends on SMP + default y A new option, should never be default 'y'. This should be default 'n' and just add it to your config frags, or select it in the top level board Kconfig. + help + Enable support for local timers on SMP platforms, rather then the + legacy IPI broadcast method. Local timers all
[linux-yocto] [PATCH 052/269] arch/arm: arm changes to support the axxia BSP
From: Charlie Paul These files were changed to support the LSI axxia 5500 board. Signed-off-by: Charlie Paul Signed-off-by: John Jacques --- arch/arm/Kconfig | 84 ++- arch/arm/Kconfig.debug| 4 ++ arch/arm/Makefile | 2 +- arch/arm/include/asm/kmap_types.h | 5 +++ arch/arm/include/asm/spinlock.h | 6 +++ arch/arm/kernel/head.S| 8 arch/arm/kernel/irq.c | 2 +- arch/arm/kernel/perf_event_v7.c | 3 +- arch/arm/tools/mach-types | 1 + 9 files changed, 111 insertions(+), 4 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c0fcab6..0f6c9e0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -359,6 +359,29 @@ config ARM_SINGLE_ARMV7M select SPARSE_IRQ select USE_OF +config ARCH_AXXIA + bool "LSI Axxia family" + select ARCH_PHYS_ADDR_T_64BIT + select ARCH_DMA_ADDR_T_64BIT + select ARCH_WANT_OPTIONAL_GPIOLIB + select ARM_AMBA + select COMMON_CLK + select CLKDEV_LOOKUP + select CLKSRC_MMIO + select GENERIC_CLOCKEVENTS + select HAVE_CLK + select HAVE_PATA_PLATFORM + select ARM_TIMER_SP804 + select ICST + select NEED_MACH_IO_H + select ZONE_DMA + select PCI + select PCI_DOMAINS if PCI + select ARCH_SUPPORTS_MSI if PCI + select HAS_RAPIDIO + help + This enables support for the LSI Axxia boards. + config ARCH_EBSA110 bool "EBSA-110" select ARCH_USES_GETTIMEOFFSET @@ -839,6 +862,8 @@ source "arch/arm/mach-ux500/Kconfig" source "arch/arm/mach-versatile/Kconfig" +source "arch/arm/mach-axxia/Kconfig" + source "arch/arm/mach-vexpress/Kconfig" source "arch/arm/plat-versatile/Kconfig" @@ -1268,6 +1293,19 @@ source "drivers/pci/Kconfig" source "drivers/pcmcia/Kconfig" +config HAS_RAPIDIO + bool + default n + +config RAPIDIO + bool "RapidIO support" + depends on HAS_RAPIDIO || PCI + help + If you say Y here, the kernel will include drivers and + infrastructure code to support RapidIO interconnect devices. + +source "drivers/rapidio/Kconfig" + endmenu menu "Kernel Features" @@ -1438,12 +1476,46 @@ config NR_CPUS depends on SMP default "4" +menu "Support for hot-pluggable CPUs" + config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" - depends on SMP + depends on SMP && HOTPLUG help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. +choice + prompt "CPU Power Down Mode" + default HOTPLUG_CPU_COMPLETE_POWER_DOWN + help + This is used to select how the CPU is going to be powered down. If LOW POWER + is selected then the CPU enters a WFI state and waits for an interrupt to + wake up. If COMPLETE POWER down is selected the CPU power is turned off. The only + way to power on the CPU is to execute a command. + +config HOTPLUG_CPU_COMPLETE_POWER_DOWN + bool "Power off the CPU" + help + This will power off the CPU completely. The irqs are migrated + to another CPU. + +config HOTPLUG_CPU_LOW_POWER + bool "Low Power CPU (wfi)" + help + This will put the CPU into a low power mode wfi mode. When an interrupt + is received the CPU will power on again. + +endchoice + +config HOTPLUG_CPU_L2_POWER_DOWN + bool "Power Off L2 Cache" + depends on HOTPLUG_CPU_COMPLETE_POWER_DOWN + default n if HOTPLUG_CPU_LOW_POWER + help + Select this if you want to power down the L2 cache when + all CPUS of a cluster have been powered off. + +endmenu config ARM_PSCI bool "Support for the ARM Power State Coordination Interface (PSCI)" @@ -1456,6 +1528,16 @@ config ARM_PSCI 0022A ("Power State Coordination Interface System Software on ARM processors"). +config LOCAL_TIMERS + bool "Use local timer interrupts" + depends on SMP + default y + help + Enable support for local timers on SMP platforms, rather then the + legacy IPI broadcast method. Local timers allows the system + accounting to be spread across the timer interval, preventing a + "thundering herd" at every timer tick. + # The GPIO number here must be sorted by descending number. In case of # a multiplatform kernel, we just want the highest value required by the # selected platforms. diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 426d271..4f58e22 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -145,6 +145,10 @@ choice Say Y here if you want kernel low-level debugging support on the USART3 port of sama5d4. + config DEBUG