[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
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
