From 4e5595a089c815febd7a0d42ab62940bf13f73ac Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Wed, 29 Dec 2021 18:47:16 +0200
Subject: Preparations for refactoring

---
 arch/riscv/mm.txt | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'arch/riscv/mm.txt')

diff --git a/arch/riscv/mm.txt b/arch/riscv/mm.txt
index 30ffc88..e5c52cb 100644
--- a/arch/riscv/mm.txt
+++ b/arch/riscv/mm.txt
@@ -18,6 +18,12 @@ Offset		| Size		| Purpose
 (first 256KiB page reserved for whatever, next 256KiB reserved for kernel vma,
  next 512KiB reserved for kernel pma?)
 
+Sv39, final answer:
+
+First 255 pages are userspace (uvmem), page 255 is reserved for callstack.
+Following 255 pages are reserved for kernel 'direct mapping', and the 512th page
+is reserved for kernel IO.
+
 Sv48:
 
 Offset		| Size		| Purpose
-- 
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