Concepts

Describes the architecture and technology features of the Kernel that are important for a base port.

• Kernel Architecture 2 Architecture
  The Kernel Architecture 2 component has a modular architecture that allows ports of it to be created for different phone hardware architectures.
• ASSP/Variant Architecture
  A base port must provide a software layer called the ASSP/Variant.
• Interrupt Dispatcher
  The ASSP/Variant part of the base port must implement an interrupt dispatcher to manage interrupts.
• Flexible Memory Model Guide
  Overview of the Symbian platform flexible memory model
• Nanokernel
  The nanokernel is the core of the Kernel, and is a small real-time operating system (RTOS) designed to run Symbian platform.
• Personality Layer for Real Time Applications
  A base port can add a software layer called a personality layer to the Kernel to provide an emulation of a real time operating system (RTOS)
• Personality Layer Design
  Provides some guidelines for the design of a personality layer for real time Applications for the Kernel.
• Platform Security Settings
  Describes the platform security setting in the variant project header file
• Power Management
  The kernel provides a framework for managing power within the system, and the management of the transition between power states.
• Power States
  Describes three power states that are defined by the kernel.
• RAM Zones
  A RAM zone is a physically contiguous section of RAM address space that has a preference value and a unique ID.
• Timers
  The kernel implements timing functions using a 1 millisecond tick timer.
• Validity Checks
  The Kernel can be configured to check that programs meet various pre-conditions before they call kernel-side functions.
• Vector Floating Point (VFP)
  ARM provide a hardware floating point coprocessor that provides floating point computation that is fully compliant with IEEE Std 754-1985.
• CSPRNG Implementation in Kernel