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New seperate read/write handlers for getHostPt

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2448
This commit is contained in:
Sjoerd van der Berg 2006-01-30 10:04:46 +00:00
parent b45c282867
commit 28588c997b
1 changed files with 9 additions and 19 deletions
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28
src/hardware/memory.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: memory.cpp,v 1.42 2006-01-07 14:17:53 c2woody Exp $ */
/* $Id: memory.cpp,v 1.43 2006-01-30 10:04:46 harekiet Exp $ */
#include "dosbox.h"
#include "mem.h"
@ -47,7 +47,7 @@ static struct MemoryBlock {
Bitu start_page;
Bitu end_page;
Bitu pages;
HostPt address;
PageHandler *handler;
} lfb;
struct {
bool enabled;
@ -69,9 +69,6 @@ public:
void writeb(PhysPt addr,Bitu val) {
LOG_MSG("Illegal write to %x, CS:IP %8x:%8x",addr,SegValue(cs),reg_eip);
}
HostPt GetHostPt(Bitu phys_page) {
return 0;
}
};
class RAMPageHandler : public PageHandler {
@ -79,7 +76,10 @@ public:
RAMPageHandler() {
flags=PFLAG_READABLE|PFLAG_WRITEABLE;
}
HostPt GetHostPt(Bitu phys_page) {
HostPt GetHostReadPt(Bitu phys_page) {
return MemBase+phys_page*MEM_PAGESIZE;
}
HostPt GetHostWritePt(Bitu phys_page) {
return MemBase+phys_page*MEM_PAGESIZE;
}
};
@ -100,24 +100,14 @@ public:
}
};
class LFBPageHandler : public RAMPageHandler {
public:
LFBPageHandler() {
flags=PFLAG_READABLE|PFLAG_WRITEABLE|PFLAG_NOCODE;
}
HostPt GetHostPt(Bitu phys_page) {
return memory.lfb.address+(phys_page-memory.lfb.start_page)*4096;
}
};
static IllegalPageHandler illegal_page_handler;
static RAMPageHandler ram_page_handler;
static ROMPageHandler rom_page_handler;
static LFBPageHandler lfb_page_handler;
void MEM_SetLFB(Bitu page,Bitu pages,HostPt pt) {
memory.lfb.address=pt;
void MEM_SetLFB(Bitu page, Bitu pages, PageHandler *handler) {
memory.lfb.handler=handler;
memory.lfb.start_page=page;
memory.lfb.end_page=page+pages;
memory.lfb.pages=pages;
@ -128,7 +118,7 @@ PageHandler * MEM_GetPageHandler(Bitu phys_page) {
if (phys_page<memory.pages) {
return memory.phandlers[phys_page];
} else if ((phys_page>=memory.lfb.start_page) && (phys_page<memory.lfb.end_page)) {
return &lfb_page_handler;
return memory.lfb.handler;
}
return &illegal_page_handler;
}