From 46bb1d3157f9ad575c83a4bfa1e32b0d21bc8546 Mon Sep 17 00:00:00 2001
From: Kartik Agaram <vc@akkartik.com>
Date: Sat, 14 Sep 2019 01:42:29 -0700
Subject: 5650 - support a second OS: soso

https://github.com/ozkl/soso

+ Much smaller than Linux; builds instantly
+ Supports graphics
- No network support
- Doesn't work on a cloud server (yet?)
---
 kernel.soso/vmm.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 kernel.soso/vmm.h

(limited to 'kernel.soso/vmm.h')

diff --git a/kernel.soso/vmm.h b/kernel.soso/vmm.h
new file mode 100644
index 00000000..f7955afb
--- /dev/null
+++ b/kernel.soso/vmm.h
@@ -0,0 +1,48 @@
+#ifndef VMM_H
+#define VMM_H
+
+#include "common.h"
+
+typedef struct Process Process;
+typedef struct List List;
+
+extern uint32 *gKernelPageDirectory;
+
+extern uint8 gKernelPageHeapBitmap[];
+
+
+#define SET_PAGEFRAME_USED(bitmap, pageIndex)	bitmap[((uint32) pageIndex)/8] |= (1 << (((uint32) pageIndex)%8))
+#define SET_PAGEFRAME_UNUSED(bitmap, p_addr)	bitmap[((uint32) p_addr/PAGESIZE_4M)/8] &= ~(1 << (((uint32) p_addr/PAGESIZE_4M)%8))
+#define IS_PAGEFRAME_USED(bitmap, pageIndex)	(bitmap[((uint32) pageIndex)/8] & (1 << (((uint32) pageIndex)%8)))
+
+#define SET_PAGEHEAP_USED(pageIndex)	gKernelPageHeapBitmap[((uint32) pageIndex)/8] |= (1 << (((uint32) pageIndex)%8))
+#define SET_PAGEHEAP_UNUSED(p_addr)	gKernelPageHeapBitmap[((uint32) p_addr/PAGESIZE_4K)/8] &= ~(1 << (((uint32) p_addr/PAGESIZE_4K)%8))
+#define IS_PAGEHEAP_USED(pageIndex)	(gKernelPageHeapBitmap[((uint32) pageIndex)/8] & (1 << (((uint32) pageIndex)%8)))
+
+char* getPageFrame4M();
+void releasePageFrame4M(uint32 p_addr);
+
+uint32 *getPdFromReservedArea4K();
+void releasePdFromReservedArea4K(uint32 *);
+
+void initializeMemory(uint32 high_mem);
+
+uint32 *createPd();
+void destroyPd(uint32 *);
+uint32 *copyPd(uint32* pd);
+
+BOOL addPageToPd(uint32* pd, char *v_addr, char *p_addr, int flags);
+BOOL removePageFromPd(uint32* pd, char *v_addr, BOOL releasePageFrame);
+
+void enablePaging();
+void disablePaging();
+
+uint32 getTotalPageCount();
+uint32 getUsedPageCount();
+uint32 getFreePageCount();
+
+void initializeProcessMmap(Process* process);
+void* mapMemory(Process* process, uint32 nBytes, uint32 pAddress, List* pAddressList);
+BOOL unmapMemory(Process* process, uint32 nBytes, uint32 vAddress);
+
+#endif // VMM_H
-- 
cgit 1.4.1-2-gfad0