--- /dev/null
+/*
+ * Misc. kernel definitions
+ * Copyright (c) 2001,2004 David H. Hovemeyer <daveho@cs.umd.edu>
+ * $Revision: 1.9 $
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "COPYING".
+ */
+
+#ifndef GEEKOS_DEFS_H
+#define GEEKOS_DEFS_H
+
+
+/*Zheng 08/01/2008*/
+#define SYSSEG 0x1000
+#define COMMAND_LINE_SIZE 1024
+
+#define SETUPSECTS 4 /* default nr of setup-sectors */
+#define SYSSIZE 0x7f00 /* system size: # of 16-byte clicks */
+#define ROOT_DEV 0 /* ROOT_DEV is now written by "build" */
+#define SWAP_DEV 0 /* SWAP_DEV is now written by "build" */
+
+/*
+ * Kernel code and data segment selectors.
+ * Keep these up to date with defs.asm.
+ */
+#define KERNEL_CS (1<<3)
+#define KERNEL_DS (2<<3)
+
+
+/*
+ * Address where kernel is loaded
+ */
+#define KERNEL_START_ADDR 0x100000
+
+/*
+ * Kernel and user privilege levels
+ */
+#define KERNEL_PRIVILEGE 0
+#define USER_PRIVILEGE 3
+
+
+/*
+ * Software interrupt for syscalls
+ */
+#define SYSCALL_INT 0x90
+
+/*
+ * The windows versions of gcc use slightly different
+ * names for the bss begin and end symbols than the Linux version.
+ */
+#if defined(GNU_WIN32)
+# define BSS_START _bss_start__
+# define BSS_END _bss_end__
+#else
+# define BSS_START __bss_start
+# define BSS_END end
+#endif
+
+/*
+ * x86 has 4096 byte pages
+ */
+#define PAGE_POWER 12
+#define PAGE_SIZE (1<<PAGE_POWER)
+#define PAGE_MASK (~(0xffffffff << PAGE_POWER))
+
+#define KERNEL_THREAD_OBJECT (PAGE_SIZE)
+#define KERNEL_STACK (PAGE_SIZE * 2)
+
+
+
+// Where we load the vm's kernel image (1MB)
+//#define VM_KERNEL_TARGET (0x100000)
+
+
+
+
+
+#endif /* GEEKOS_DEFS_H */
