xv6-riscv - MIT xv6-RISCV kernel modified to RV64I base integer extension

Age	Commit message (Collapse)	Author
2019-07-30	cut ramdisk	Robert Morris

2019-07-25	comments for timer setup	Robert Morris

2019-07-23	simplify kernel mapping calls	Robert Morris

2019-07-22	-MD and TRAPFRAME	Robert Morris

2019-07-22	Allocate 2 pages per proc, with the top one unmapped.	Frans Kaashoek
	The page below the last proc is unmapped by default (because the kernel doesn't map anything right below the kernel stacks).
2019-07-19	One way of supporting a guard page below kstack: allocate kstacks in	Frans Kaashoek
	procinit() and map them high up (below TRAMPOLNE) with an empty mapping below each stack. Never free a kernel stack. Another way would be to allocate and map them dynamically, but then we need to reload page table when switching processes in scheduler() and/or have a kernel pagetable per proc (if we want k->stack to be the same virtual address in each process). One gotcha: kernel addresses are not equal to physical addresses for stack addresses. A stack address must be translated if we need its physical address (e.g., virtio passes a stack address to the disk).
2019-06-13	clean up virtio code	Robert Morris

2019-06-13	eliminate ramdisk	Robert Morris

2019-06-13	virtio disk driver	Robert Morris

2019-06-11	separate source into kernel/ user/ mkfs/	Robert Morris