55eceb2203
* Add configUSE_TASK_FPU_SUPPORT to AARCH64 port NEON SIMD is required by standard AARCH64 and its registers are frequently utilized by standard functions such as memcpy(). This means that even simple tasks that do not use any floating point arithmetics may still alter the contents of the FPU registers. For this reason it makes sense to add support for configUSE_TASK_FPU_SUPPORT to be able to enforce FPU register saving and restoring globally. The implementation was largely adopted from the ARM_CA9 port. However, the FPU registers must be placed on the stack before the critical nesting count to match the AARCH64 portASM.S. |
10 months ago | |
|---|---|---|
| .. | ||
| README.md | 11 months ago | |
| port.c | 10 months ago | |
| portASM.S | 1 year ago | |
| portmacro.h | 10 months ago | |
README.md
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 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