nuttx

History

Lup Yuen Lee bdf60d7966 risc-v/bl808, sg2000: Configure MMU to cache Kernel Text, Data and Heap (T-Head C906)

This PR configures the BL808 and SG2000 MMU (inside T-Head C906) to cache the the Kernel Text, Data and Heap.  We set the MMU Flags (Shareable, Bufferable and Cacheable) as explained in this article: https://lupyuen.github.io/articles/plic3#appendix-mmu-caching-for-t-head-c906

This PR fixes the Slow Memory Access for NuttX Kernel in BL808 and SG2000: https://github.com/apache/nuttx/issues/12696

In the next PR, we will fix the Slow Memory Access for NuttX Apps, by caching the User Text and Data.

arch/risc-v/src/bl808/bl808_mm_init.c: Added MMU Flags (Shareable, Bufferable and Cacheable) for BL808 Kernel Text, Data and Heap

arch/risc-v/src/sg2000/sg2000_mm_init.c: Added MMU Flags (Shareable, Bufferable and Cacheable) for SG2000 Kernel Text, Data and Heap

2024-07-17 12:08:04 -03:00

arm

/rp2040 Rename the RP2040-specific PWM_MULTICHAN definition to avoid confusion with the global PWM_MULTICHAN

2024-07-16 20:09:10 +08:00

arm64

zynq-mpsoc: add support for mio/emio

2024-07-16 18:50:52 -03:00

avr

at32uc3a0: Initial work for SimpleMachines' Mizar32-A

2024-07-15 20:46:41 +08:00

ceva

Revert "irq: remove restore_critical_section in irq"