From 3438080f00d3c82b8a9776bcf725ebbbce677b35 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Fri, 12 Jan 2024 14:13:19 -0500
Subject: kernel/amd64: pmap: Document PTE flags further

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/arch/amd64/amd64/pmap.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'sys/arch/amd64')

diff --git a/sys/arch/amd64/amd64/pmap.c b/sys/arch/amd64/amd64/pmap.c
index 3cae745..cc9c2e8 100644
--- a/sys/arch/amd64/amd64/pmap.c
+++ b/sys/arch/amd64/amd64/pmap.c
@@ -33,6 +33,11 @@
 #include <machine/asm/tlb.h>
 #include <assert.h>
 
+/*
+ * Page-Table Entry (PTE) flags
+ *
+ * See Intel SDM Vol 3A, Section 4.5, Table 4-19
+ */
 #define PTE_ADDR_MASK   0x000FFFFFFFFFF000
 #define PTE_P           __BIT(0)        /* Present */
 #define PTE_RW          __BIT(1)        /* Writable */
-- 
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