3 The **CMSIS-Core (Cortex-A)** component implements the basic run-time system for a Cortex-A device and gives the user access to the processor core and the device peripherals.
6 - **Hardware Abstraction Layer (HAL)** for Cortex-A processor registers with standardized definitions for the GIC, FPU, MMU, Cache, and core access functions.
7 - **System exception names** to interface to system exceptions without having compatibility issues.
8 - **Methods to organize header files** that makes it easy to learn new Cortex-A microcontroller products and improve software portability. This includes naming conventions for device-specific interrupts.
9 - **Methods for system initialization** to be used by each MCU vendor. For example, the standardized SystemInit() function is essential for configuring the clock system of the device.
10 - **Intrinsic functions** used to generate CPU instructions that are not supported by standard C functions.
11 - A variable to determine the **system clock frequency** which simplifies the setup of the system timers.
13 The following sections provide details about the CMSIS-Core (Cortex-A):
15 - \ref using_pg describes the project setup and shows a simple program example.
16 - \ref templates_pg describes the files of the CMSIS-Core (Cortex-A) in detail and explains how to adapt template files provided by Arm to silicon vendor devices.
17 - \ref coreMISRA_Exceptions_pg describes the violations to the MISRA standard.
18 - [**API Reference**](modules.html) describes the features and functions of the \ref device_h_pg in detail.
19 - [**Data Structures**](annotated.html) describe the data structures of the \ref device_h_pg in detail.
21 ## Access to CMSIS-Core (Cortex-A)
23 CMSIS-Core is actively maintained in the [**CMSIS 6 GitHub repository**](https://github.com/ARM-software/CMSIS_6) and released as part of the [**CMSIS Software Pack**](../General/cmsis_pack.html).
25 The following directories and files relevant to CMSIS-Core (Cortex-A) are present in the **ARM::CMSIS** Pack:
28 :---------------------------------|:------------------------------------------------------------------------
29 📂 CMSIS | CMSIS Base software components folder
30 ┣ 📂 Documentation/html/Core_A | A local copy of this CMSIS-Core (A) documentation
31 ┗ 📂 Core | CMSIS-Core files
32   ┣ 📂 Include | \ref CMSIS_Processor_files.
33    â”— 📂 a-profile| Header files specific for Arm A-Profile.
34   â”— 📂 Template | \ref template_files_sec
36 ## Processor Support {#ref_v7A}
38 CMSIS supports a selected subset of [Cortex-A processors](https://www.arm.com/products/silicon-ip-cpu?families=cortex-m&showall=true).
40 \anchor ref_man_ca_sec
41 **Cortex-A Technical Reference Manuals**
43 The following Technical Reference Manuals describe the various Arm Cortex-A processors:
45 - [Cortex-A5](https://developer.arm.com/documentation/ddi0433) (Armv7-A architecture)
46 - [Cortex-A7](https://developer.arm.com/documentation/ddi0464) (Armv7-A architecture)
47 - [Cortex-A9](https://developer.arm.com/documentation/100511) (Armv7-A architecture)
49 ## Tested and Verified Toolchains {#tested_tools_sec}
51 The \ref templates_pg delivered with this CMSIS-Core release have been tested and verified with the following toolchains:
53 - Arm Compiler for Embedded 6.22
54 - IAR C/C++ Compiler for Arm 9.40
55 - GNU Arm Embedded Toolchain 13.2.1