# References ## Related documents | Title | Number | | --- | --- | |
**Qualcomm Technologies, Inc.** |
**Qualcomm Technologies, Inc.** | | [Qualcomm Linux Kernel Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-3/kernel_landing_page.html) | 80-70020-3 | | [Qualcomm Linux Boot Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/landing-page.html) | 80-70020-4 | | [Qualcomm Linux Security Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-11/security-home-page.html) | 80-70020-11 | | [Qualcomm Linux Bluetooth Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-13/bt-landing-page.html) | 80-70020-13 | | [Qualcomm Linux Wi-Fi Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-14/wifi_landing_page.html) | 80-70020-14 | | [Qualcomm Linux Yocto Guide](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-27/yocto_landing_page.html) | 80-70020-27 | |
**Resources** |
**Resources** | |
[Qualcomm® Package Manager 3 Documentation](https://qpm.qualcomm.com/assets/userguide/external/book/0.UserGuide/UserGuide.html) |
[Qualcomm® Package Manager 3 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 | 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 | | EUD | Embedded USB debugger | | FAR | Fault address register | | FIQ | Fast interrupt request | | FSR | Fault status register | | GDB | GNU debugger | | GFP | Get free pages | | HLOS | High-level OS | | IRQ | Interrupt request | | KASAN | Kernel address sanitizer | | KASLR | Kernel address space layout randomization | | LPASS | Low-power audio subsystem | | NoC | Network-on-chip:
It's 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 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 isn't 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
is a module in the Qualcomm TEE meant for protecting memory regions, addresses, and registers. | Last Published: Jul 06, 2025 [Previous Topic Debug non-HLOS](https://docs.qualcomm.com/bundle/publicresource/80-70020-12/topics/debug-non-hlos-subsystems.md) Source: [https://docs.qualcomm.com/doc/80-70020-12/topic/references.html](https://docs.qualcomm.com/doc/80-70020-12/topic/references.html)