257 lines
9.7 KiB
Plaintext
257 lines
9.7 KiB
Plaintext
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What: /sys/devices/platform/firmware\:zynqmp-firmware/ggs*
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Date: March 2020
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KernelVersion: 5.6
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Contact: "Jolly Shah" <jollys@xilinx.com>
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Description:
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Read/Write PMU global general storage register value,
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GLOBAL_GEN_STORAGE{0:3}.
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Global general storage register that can be used
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by system to pass information between masters.
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The register is reset during system or power-on
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resets. Three registers are used by the FSBL and
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other Xilinx software products: GLOBAL_GEN_STORAGE{4:6}.
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Usage::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
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# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
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Example::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
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# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
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Users: Xilinx
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What: /sys/devices/platform/firmware\:zynqmp-firmware/pggs*
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Date: March 2020
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KernelVersion: 5.6
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Contact: "Jolly Shah" <jollys@xilinx.com>
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Description:
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Read/Write PMU persistent global general storage register
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value, PERS_GLOB_GEN_STORAGE{0:3}.
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Persistent global general storage register that
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can be used by system to pass information between
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masters.
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This register is only reset by the power-on reset
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and maintains its value through a system reset.
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Four registers are used by the FSBL and other Xilinx
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software products: PERS_GLOB_GEN_STORAGE{4:7}.
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Register is reset only by a POR reset.
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Usage::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
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# echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
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Example::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
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# echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/pggs0
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Users: Xilinx
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What: /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
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Date: March 2020
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KernelVersion: 5.6
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Contact: "Jolly Shah" <jollys@xilinx.com>
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Description:
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This sysfs interface allows to set the shutdown scope for the
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next shutdown request. When the next shutdown is performed, the
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platform specific portion of PSCI-system_off can use the chosen
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shutdown scope.
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Following are available shutdown scopes(subtypes):
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subsystem:
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Only the APU along with all of its peripherals
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not used by other processing units will be
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shut down. This may result in the FPD power
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domain being shut down provided that no other
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processing unit uses FPD peripherals or DRAM.
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ps_only:
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The complete PS will be shut down, including the
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RPU, PMU, etc. Only the PL domain (FPGA)
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remains untouched.
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system:
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The complete system/device is shut down.
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Usage::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
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# echo <scope> > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
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Example::
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
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# echo "subsystem" > /sys/devices/platform/firmware\:zynqmp-firmware/shutdown_scope
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Users: Xilinx
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What: /sys/devices/platform/firmware\:zynqmp-firmware/health_status
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Date: March 2020
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KernelVersion: 5.6
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Contact: "Jolly Shah" <jollys@xilinx.com>
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Description:
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This sysfs interface allows to set the health status. If PMUFW
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is compiled with CHECK_HEALTHY_BOOT, it will check the healthy
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bit on FPD WDT expiration. If healthy bit is set by a user
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application running in Linux, PMUFW will do APU only restart. If
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healthy bit is not set during FPD WDT expiration, PMUFW will do
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system restart.
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Usage:
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Set healthy bit::
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
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Unset healthy bit::
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# echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status
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Users: Xilinx
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What: /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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Date: Feb 2022
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KernelVersion: 5.18
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Contact: "Ronak Jain" <ronak.jain@xilinx.com>
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Description:
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This sysfs interface allows user to configure features at
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runtime. The user can enable or disable features running at
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firmware as well as the user can configure the parameters of
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the features at runtime. The supported features are over
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temperature and external watchdog. Here, the external watchdog
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is completely different than the /dev/watchdog as the external
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watchdog is running on the firmware and it is used to monitor
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the health of firmware not APU(Linux). Also, the external
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watchdog is interfaced outside of the zynqmp soc.
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The supported config ids are for the feature configuration is,
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1. PM_FEATURE_OVERTEMP_STATUS = 1, the user can enable or
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disable the over temperature feature.
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2. PM_FEATURE_OVERTEMP_VALUE = 2, the user can configure the
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over temperature limit in Degree Celsius.
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3. PM_FEATURE_EXTWDT_STATUS = 3, the user can enable or disable
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the external watchdog feature.
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4. PM_FEATURE_EXTWDT_VALUE = 4, the user can configure the
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external watchdog feature.
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Usage:
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Select over temperature config ID to enable/disable feature
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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Check over temperature config ID is selected or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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The expected result is 1.
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Select over temperature config ID to configure OT limit
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# echo 2 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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Check over temperature config ID is selected or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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The expected result is 2.
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Select external watchdog config ID to enable/disable feature
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# echo 3 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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Check external watchdog config ID is selected or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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The expected result is 3.
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Select external watchdog config ID to configure time interval
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# echo 4 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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Check external watchdog config ID is selected or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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The expected result is 4.
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Users: Xilinx
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What: /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Date: Feb 2022
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KernelVersion: 5.18
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Contact: "Ronak Jain" <ronak.jain@xilinx.com>
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Description:
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This sysfs interface allows to configure features at runtime.
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The user can enable or disable features running at firmware.
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Also, the user can configure the parameters of the features
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at runtime. The supported features are over temperature and
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external watchdog. Here, the external watchdog is completely
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different than the /dev/watchdog as the external watchdog is
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running on the firmware and it is used to monitor the health
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of firmware not APU(Linux). Also, the external watchdog is
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interfaced outside of the zynqmp soc.
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By default the features are disabled in the firmware. The user
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can enable features by querying appropriate config id of the
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features.
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The default limit for the over temperature is 90 Degree Celsius.
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The default timer interval for the external watchdog is 570ms.
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The supported config ids are for the feature configuration is,
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1. PM_FEATURE_OVERTEMP_STATUS = 1, the user can enable or
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disable the over temperature feature.
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2. PM_FEATURE_OVERTEMP_VALUE = 2, the user can configure the
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over temperature limit in Degree Celsius.
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3. PM_FEATURE_EXTWDT_STATUS = 3, the user can enable or disable
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the external watchdog feature.
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4. PM_FEATURE_EXTWDT_VALUE = 4, the user can configure the
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external watchdog feature.
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Usage:
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Enable over temperature feature
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the over temperature feature is enabled or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 1.
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Disable over temperature feature
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the over temperature feature is disabled or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 0.
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Configure over temperature limit to 50 Degree Celsius
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# echo 2 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 50 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the over temperature limit is configured or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 50.
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Enable external watchdog feature
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# echo 3 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 1 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the external watchdog feature is enabled or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 1.
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Disable external watchdog feature
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# echo 3 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the external watchdog feature is disabled or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 0.
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Configure external watchdog timer interval to 500ms
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# echo 4 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_id
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# echo 500 > /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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Check whether the external watchdog timer interval is configured or not
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# cat /sys/devices/platform/firmware\:zynqmp-firmware/feature_config_value
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The expected result is 500.
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Users: Xilinx
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