From 3dac4b35a45e4e67a8f577e2eb21a457e9908c94 Mon Sep 17 00:00:00 2001
From: "Evgeny Grechnikov (Diamond)" <diamondz@land.ru>
Date: Wed, 9 Jul 2008 21:46:35 +0000
Subject: [PATCH] fixed problem with extremely slow work on some machines

git-svn-id: svn://kolibrios.org@821 a494cfbc-eb01-0410-851d-a64ba20cac60
---
 kernel/trunk/core/memory.inc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/trunk/core/memory.inc b/kernel/trunk/core/memory.inc
index 16adfec298..aad54f1dd9 100644
--- a/kernel/trunk/core/memory.inc
+++ b/kernel/trunk/core/memory.inc
@@ -1159,8 +1159,14 @@ proc init_mtrr
            mov ecx, 0x2FF
            wrmsr                ;disable all MTRR
 
-           stdcall set_mtrr, dword 0,dword 0,[MEM_AMOUNT],MEM_WB
-           stdcall set_mtrr, dword 1,[LFBAddress],[LFBSize],MEM_WC
+           mov eax, [MEM_AMOUNT]
+; round eax up to next power of 2
+           dec eax
+           bsr ecx, eax
+           mov eax, 2
+           shl eax, cl
+           stdcall set_mtrr, edx,edx,eax,MEM_WB
+           stdcall set_mtrr, 1,[LFBAddress],[LFBSize],MEM_WC
            xor edx, edx
            xor eax, eax
            mov ecx, 0x204