# References Source: [https://docs.qualcomm.com/doc/80-70015-12/topic/references.html](https://docs.qualcomm.com/doc/80-70015-12/topic/references.html) ## Related documents Source: [https://docs.qualcomm.com/doc/80-70015-12/topic/references.html](https://docs.qualcomm.com/doc/80-70015-12/topic/references.html) | Title | Number | | --- | --- | | **Qualcomm Technologies, Inc.** | **Qualcomm Technologies, Inc.** | | [Qualcomm Linux Security
Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70015-11) | 80-70015-11 | | [Qualcomm Linux Boot
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Documentation](https://qpm.qualcomm.com/assets/userguide/external/book/0.UserGuide/UserGuide.html) | | [Arm System Memory Management Unit
Architecture Specification, IHI0062D](https://developer.arm.com/documentation/ihi0062/dc) | [Arm System Memory Management Unit
Architecture Specification, IHI0062D](https://developer.arm.com/documentation/ihi0062/dc) | | [https://docs.kernel.org/trace/coresight/coresight-perf.html](https://docs.kernel.org/trace/coresight/coresight-perf.html) | [https://docs.kernel.org/trace/coresight/coresight-perf.html](https://docs.kernel.org/trace/coresight/coresight-perf.html) | | [https://docs.kernel.org/trace/coresight/index.html](https://docs.kernel.org/trace/coresight/index.html) | [https://docs.kernel.org/trace/coresight/index.html](https://docs.kernel.org/trace/coresight/index.html) | | [https://perf.wiki.kernel.org/index.php/Tutorial](https://perf.wiki.kernel.org/index.php/Tutorial) | [https://perf.wiki.kernel.org/index.php/Tutorial](https://perf.wiki.kernel.org/index.php/Tutorial) | | [https://man7.org/linux/man-pages/man1/ltrace.1.html](https://man7.org/linux/man-pages/man1/ltrace.1.html) | [https://man7.org/linux/man-pages/man1/ltrace.1.html](https://man7.org/linux/man-pages/man1/ltrace.1.html) | | [https://man7.org/linux/man-pages/man1/gdb.1.html](https://man7.org/linux/man-pages/man1/gdb.1.html) | [https://man7.org/linux/man-pages/man1/gdb.1.html](https://man7.org/linux/man-pages/man1/gdb.1.html) | | [https://man7.org/linux/man-pages/man5/core.5.html](https://man7.org/linux/man-pages/man5/core.5.html) | [https://man7.org/linux/man-pages/man5/core.5.html](https://man7.org/linux/man-pages/man5/core.5.html) | | [https://man7.org/linux/man-pages/man1/gdbserver.1.html](https://man7.org/linux/man-pages/man1/gdbserver.1.html) | [https://man7.org/linux/man-pages/man1/gdbserver.1.html](https://man7.org/linux/man-pages/man1/gdbserver.1.html) | | [https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu](https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu) | [https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu](https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu) | | [https://man7.org/linux/man-pages/man8/crash.8.html](https://man7.org/linux/man-pages/man8/crash.8.html) | [https://man7.org/linux/man-pages/man8/crash.8.html](https://man7.org/linux/man-pages/man8/crash.8.html) | ## Acronyms and terms Source: [https://docs.qualcomm.com/doc/80-70015-12/topic/references.html](https://docs.qualcomm.com/doc/80-70015-12/topic/references.html) | Acronym or term | Definition | | --- | --- | | aDSP | Application digital signal processor | | AHB | Advanced High-performance Bus | | AOP | Always-on-processor | | APSS | Application processor subsystem | | cDSP | Compute DSP | | CMA | Contiguous memory allocator | | CNoC | Config network-on-chip | | DCC | Data capture and compare | | DDR | Double data rate | | FAR | Fault address register | | FIQ | Fast interrupt request | | FSR | Fault status register | | GDB | GNU debugger | | GFP | Get free pages | | HLOS | High-level OS | | KASLR | Kernel address space layout randomization | | LPASS | Low-power audio subsystem | | NoC | Network-on-chip
It is a bus connecting subsystems on the SoC. There
are various types of NoCs such as System NoC (SNoC), Config NoC
(CNoC), Multimedia NoC (MMNoC). | | PCB | Printed circuit board | | PMIC | Power management IC
PMIC is the power supply block of the
chipset. | | PS\_HOLD | Power-supply hold signal line from the SoC to the PMIC | | QCAP | Qualcomm crash analysis portal | | SNoC | System network-on-chip | | SPM | Subsystem power manager | | SMMU | System memory management unit | | SS | Subsystem | | TRACE32 | Lauterbach TRACE32 software | | TBU | Translation buffer unit. Arm^®^ SMMU IP component. | | TCM | Tightly coupled memory | | TEE | Trusted execution environment | | TSENS | Temperature sensor
This sensor captures the junction temperature of
the chipset. | | TZ | TrustZone | | WD | Watchdog
A watchdog is a fixed-length counter that enables a
system to recover from an unexpected hardware or software
catastrophe. | | WD Bark | Watchdog timeout that results in a bark interrupt and a kernel
panic. | | WB Bite | Watchdog timeout that occurs if a watchdog is not petted even after
WD Bark, resulting in a bite interrupt in secure mode. This issue
further leads to a system reset. | | WPSS | Wireless local area network processor subsystem | | XBL | eXtensible Boot Loader | | xPU | External protection unit
It is a module in the Qualcomm TEE and is
meant for protecting memory regions, addresses, and
registers. | Last Published: Oct 14, 2024 [Previous Topic Debug non-HLOS](https://docs.qualcomm.com/bundle/publicresource/80-70015-12/topics/debug-non-hlos-subsystems.md) [Next Topic Archive](https://docs.qualcomm.com/bundle/publicresource/80-70015-12/topics/Archive.md)