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prevent write-through for recompiler code pages in rom area (pitfall2 pcjr booter)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3445
This commit is contained in:
Sebastian Strohhäcker 2009-07-12 20:13:05 +00:00
parent 4ed39f7fd3
commit 4b15cbd0a1
1 changed files with 44 additions and 0 deletions
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44
src/cpu/core_dyn_x86/cache.h
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@ -1,3 +1,23 @@
/*
* Copyright (C) 2002-2009 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: cache.h,v 1.20 2009-07-12 20:13:05 c2woody Exp $ */
class CacheBlock {
public:
void Clear(void);
@ -88,6 +108,10 @@ public:
return is_current_block;
}
void writeb(PhysPt addr,Bitu val){
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("wb:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readb(hostmem+addr)==(Bit8u)val) return;
host_writeb(hostmem+addr,val);
@ -104,6 +128,10 @@ public:
InvalidateRange(addr,addr);
}
void writew(PhysPt addr,Bitu val){
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("ww:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readw(hostmem+addr)==(Bit16u)val) return;
host_writew(hostmem+addr,val);
@ -120,6 +148,10 @@ public:
InvalidateRange(addr,addr+1);
}
void writed(PhysPt addr,Bitu val){
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("wd:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readd(hostmem+addr)==(Bit32u)val) return;
host_writed(hostmem+addr,val);
@ -136,6 +168,10 @@ public:
InvalidateRange(addr,addr+3);
}
bool writeb_checked(PhysPt addr,Bitu val) {
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return false;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("cb:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readb(hostmem+addr)==(Bit8u)val) return false;
if (!*(Bit8u*)&write_map[addr]) {
@ -158,6 +194,10 @@ public:
return false;
}
bool writew_checked(PhysPt addr,Bitu val) {
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return false;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("cw:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readw(hostmem+addr)==(Bit16u)val) return false;
if (!*(Bit16u*)&write_map[addr]) {
@ -180,6 +220,10 @@ public:
return false;
}
bool writed_checked(PhysPt addr,Bitu val) {
if (GCC_UNLIKELY(old_pagehandler->flags&PFLAG_HASROM)) return false;
if (GCC_UNLIKELY((old_pagehandler->flags&PFLAG_READABLE)!=PFLAG_READABLE)) {
E_Exit("cd:non-readable code page found that is no ROM page");
}
addr&=4095;
if (host_readd(hostmem+addr)==(Bit32u)val) return false;
if (!*(Bit32u*)&write_map[addr]) {