Investigating issues in implementing the minimal U mode and questions regarding the xv6 implementation
Analysis of xv6 trampoline implementation, page table switching, and sfence.vma usage in U/S mode transitions.
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Implementation of UART interrupts
Implementing UART TX interrupts with buffer management, LSR register handling, and debugging ebreak interrupt issues.
Read moredevlog 12-23
Implementing CLINT timer interrupts with RISC-V privilege mode handling, mscratch usage, and interrupt delegation challenges.
Read moredevlog 12-21
Clarifying IP vs IE interrupt concepts in RISC-V, hardware configuration issues, and trap entry point implementation lessons.
Read morePTE's Confusion Issues and Problem Tracking and Handling
Addressing chicken-and-egg problems in high-address mapping, PTE allocation misconceptions, and implementing ekalloc for boot-time memory management.
Read moredevlog 12-19
Challenges in implementing high-half kernel mapping, modifying kalloc for pre/post-paging allocation strategies.
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