--- /dev/null
+/*
+ * Copyright (C) 2002-2015 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.
+ */
+
+#ifndef DOSBOX_MEM_H
+#define DOSBOX_MEM_H
+
+#ifndef DOSBOX_DOSBOX_H
+#include "dosbox.h"
+#endif
+
+typedef Bit32u PhysPt;
+typedef Bit8u * HostPt;
+typedef Bit32u RealPt;
+
+typedef Bit32s MemHandle;
+
+#define MEM_PAGESIZE 4096
+
+extern HostPt MemBase;
+HostPt GetMemBase(void);
+
+bool MEM_A20_Enabled(void);
+void MEM_A20_Enable(bool enable);
+
+/* Memory management / EMS mapping */
+HostPt MEM_GetBlockPage(void);
+Bitu MEM_FreeTotal(void); //Free 4 kb pages
+Bitu MEM_FreeLargest(void); //Largest free 4 kb pages block
+Bitu MEM_TotalPages(void); //Total amount of 4 kb pages
+Bitu MEM_AllocatedPages(MemHandle handle); // amount of allocated pages of handle
+MemHandle MEM_AllocatePages(Bitu pages,bool sequence);
+MemHandle MEM_GetNextFreePage(void);
+PhysPt MEM_AllocatePage(void);
+void MEM_ReleasePages(MemHandle handle);
+bool MEM_ReAllocatePages(MemHandle & handle,Bitu pages,bool sequence);
+
+MemHandle MEM_NextHandle(MemHandle handle);
+MemHandle MEM_NextHandleAt(MemHandle handle,Bitu where);
+
+/*
+ The folowing six functions are used everywhere in the end so these should be changed for
+ Working on big or little endian machines
+*/
+
+#if defined(WORDS_BIGENDIAN) || !defined(C_UNALIGNED_MEMORY)
+
+static INLINE Bit8u host_readb(HostPt off) {
+ return off[0];
+}
+static INLINE Bit16u host_readw(HostPt off) {
+ return off[0] | (off[1] << 8);
+}
+static INLINE Bit32u host_readd(HostPt off) {
+ return off[0] | (off[1] << 8) | (off[2] << 16) | (off[3] << 24);
+}
+static INLINE void host_writeb(HostPt off,Bit8u val) {
+ off[0]=val;
+}
+static INLINE void host_writew(HostPt off,Bit16u val) {
+ off[0]=(Bit8u)(val);
+ off[1]=(Bit8u)(val >> 8);
+}
+static INLINE void host_writed(HostPt off,Bit32u val) {
+ off[0]=(Bit8u)(val);
+ off[1]=(Bit8u)(val >> 8);
+ off[2]=(Bit8u)(val >> 16);
+ off[3]=(Bit8u)(val >> 24);
+}
+
+#else
+
+static INLINE Bit8u host_readb(HostPt off) {
+ return *(Bit8u *)off;
+}
+static INLINE Bit16u host_readw(HostPt off) {
+ return *(Bit16u *)off;
+}
+static INLINE Bit32u host_readd(HostPt off) {
+ return *(Bit32u *)off;
+}
+static INLINE void host_writeb(HostPt off,Bit8u val) {
+ *(Bit8u *)(off)=val;
+}
+static INLINE void host_writew(HostPt off,Bit16u val) {
+ *(Bit16u *)(off)=val;
+}
+static INLINE void host_writed(HostPt off,Bit32u val) {
+ *(Bit32u *)(off)=val;
+}
+
+#endif
+
+
+static INLINE void var_write(Bit8u * var, Bit8u val) {
+ host_writeb((HostPt)var, val);
+}
+
+static INLINE void var_write(Bit16u * var, Bit16u val) {
+ host_writew((HostPt)var, val);
+}
+
+static INLINE void var_write(Bit32u * var, Bit32u val) {
+ host_writed((HostPt)var, val);
+}
+
+/* The Folowing six functions are slower but they recognize the paged memory system */
+
+Bit8u mem_readb(PhysPt pt);
+Bit16u mem_readw(PhysPt pt);
+Bit32u mem_readd(PhysPt pt);
+
+void mem_writeb(PhysPt pt,Bit8u val);
+void mem_writew(PhysPt pt,Bit16u val);
+void mem_writed(PhysPt pt,Bit32u val);
+
+static INLINE void phys_writeb(PhysPt addr,Bit8u val) {
+ host_writeb(MemBase+addr,val);
+}
+static INLINE void phys_writew(PhysPt addr,Bit16u val){
+ host_writew(MemBase+addr,val);
+}
+static INLINE void phys_writed(PhysPt addr,Bit32u val){
+ host_writed(MemBase+addr,val);
+}
+
+static INLINE Bit8u phys_readb(PhysPt addr) {
+ return host_readb(MemBase+addr);
+}
+static INLINE Bit16u phys_readw(PhysPt addr){
+ return host_readw(MemBase+addr);
+}
+static INLINE Bit32u phys_readd(PhysPt addr){
+ return host_readd(MemBase+addr);
+}
+
+/* These don't check for alignment, better be sure it's correct */
+
+void MEM_BlockWrite(PhysPt pt,void const * const data,Bitu size);
+void MEM_BlockRead(PhysPt pt,void * data,Bitu size);
+void MEM_BlockCopy(PhysPt dest,PhysPt src,Bitu size);
+void MEM_StrCopy(PhysPt pt,char * data,Bitu size);
+
+void mem_memcpy(PhysPt dest,PhysPt src,Bitu size);
+Bitu mem_strlen(PhysPt pt);
+void mem_strcpy(PhysPt dest,PhysPt src);
+
+/* The folowing functions are all shortcuts to the above functions using physical addressing */
+
+static INLINE Bit8u real_readb(Bit16u seg,Bit16u off) {
+ return mem_readb((seg<<4)+off);
+}
+static INLINE Bit16u real_readw(Bit16u seg,Bit16u off) {
+ return mem_readw((seg<<4)+off);
+}
+static INLINE Bit32u real_readd(Bit16u seg,Bit16u off) {
+ return mem_readd((seg<<4)+off);
+}
+
+static INLINE void real_writeb(Bit16u seg,Bit16u off,Bit8u val) {
+ mem_writeb(((seg<<4)+off),val);
+}
+static INLINE void real_writew(Bit16u seg,Bit16u off,Bit16u val) {
+ mem_writew(((seg<<4)+off),val);
+}
+static INLINE void real_writed(Bit16u seg,Bit16u off,Bit32u val) {
+ mem_writed(((seg<<4)+off),val);
+}
+
+
+static INLINE Bit16u RealSeg(RealPt pt) {
+ return (Bit16u)(pt>>16);
+}
+
+static INLINE Bit16u RealOff(RealPt pt) {
+ return (Bit16u)(pt&0xffff);
+}
+
+static INLINE PhysPt Real2Phys(RealPt pt) {
+ return (RealSeg(pt)<<4) +RealOff(pt);
+}
+
+static INLINE PhysPt PhysMake(Bit16u seg,Bit16u off) {
+ return (seg<<4)+off;
+}
+
+static INLINE RealPt RealMake(Bit16u seg,Bit16u off) {
+ return (seg<<16)+off;
+}
+
+static INLINE void RealSetVec(Bit8u vec,RealPt pt) {
+ mem_writed(vec<<2,pt);
+}
+
+static INLINE void RealSetVec(Bit8u vec,RealPt pt,RealPt &old) {
+ old = mem_readd(vec<<2);
+ mem_writed(vec<<2,pt);
+}
+
+static INLINE RealPt RealGetVec(Bit8u vec) {
+ return mem_readd(vec<<2);
+}
+
+#endif
+
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