| # Armv8-A architecture support |
| |
| The Armv8-A architecture introduces the ability to use 64-bit and 32-bit |
| Execution states, known as AArch64 and AArch32 respectively. The AArch64 |
| Execution state supports the A64 instruction set. It holds addresses in 64-bit |
| registers and allows instructions in the base instruction set to use 64-bit |
| registers for their processing. |
| |
| The AArch32 Execution state is a 32-bit Execution state that preserves |
| backwards compatibility with the Armv7-A architecture, enhancing that profile |
| so that it can support some features included in the AArch64 state. It supports |
| the T32 and A32 instruction sets. Follow the |
| [link](https://developer.arm.com/Architectures/A-Profile%20Architecture) |
| for more information. |
| |
| ## ARM_AARCH64 port |
| |
| This port adds support for Armv8-A architecture AArch64 execution state. |
| This port is generic and can be used as a starting point for Armv8-A |
| application processors. |
| |
| * ARM_AARCH64 |
| * Memory mapped interface to access Arm GIC registers |
