map.h

小型操作系统,以VC为开发环境,需要boachs调试

/***************************************************************************
**     File name   : map.h
**     Author      : x.cheng
**     Create date :
**
**	   Comment:
**        内存映射头文件
**
**     Revisions:
**     $Log: map.h,v $
**     Revision 1.3  2005/08/19 15:00:32  x.cheng
**     using vector to store free page, so change free memory start address
**
**     Revision 1.2  2005/07/27 08:04:01  x.cheng
**     KernelEnd_...bug fixing...
**
**     Revision 1.1.1.1  2005/07/27 06:53:15  x.cheng
**     add into repositories
**
**
***************************************************************************/
#ifndef __MAP_H__
#define __MAP_H__

// --- V86-required address space ------------------------------------- //

//! BIOS Interrupt Vector Table (IVT) start address.
#define BIOS_IVT_START		0x00000000
//! BIOS Interrupt Vector Table (IVT) end address.
#define BIOS_IVT_END		0x00001000

//! Video Buffer area start address.
#define VIDEO_BUF_START		0x000A0000
//! Video Buffer area end address.
#define VIDEO_BUF_END		0x000C0000

//! ROM BIOS memory start address.
#define BIOS_ROM_START		0x000C0000
//! ROM BIOS memory end address.
#define BIOS_ROM_END		0x00100000

// --- Kernel virtual address space ----------------------------------- //
#define KERNEL_VIRTUAL_START		0xC0000000

//! Kernel virtual start address.
//! \note Must be (PAGE_SIZE*1024) aligned!!!
#define KERNEL_LINK_VIRTUAL_ADDRESS_START		0xC0100000

extern  unsigned char* g_pucMemoryBitmapEnd;
#define KERNEL_FREE_MEMORY_START	g_pucMemoryBitmapEnd
// Kernel virtual address linkage end
extern unsigned long KernelEnd_;
#define KERNEL_LINK_VIRTUAL_ADDRESS_END		&KernelEnd_

#define KERNEL_HEAP_START_ADDRESS		0xD0000000	// Kernel heap start address.

#define KERNEL_HEAP_END_ADDRESS			0xE0000000	// Kernel heap end address.

//! Some physical memory (first 16MB of physical memory are mapped here)
//! start address.
#define KERNEL_PHYS_MEM_START		0xE0000000

//! Some physical memory (first 16MB of physical memory are mapped here)
//! end address.
#define KERNEL_PHYS_MEM_END		0xE1000000


//! Temporary memory area start address.
#define KERNEL_TEMP_START_ADDRESS		0xE1000000
//! Temporary memory area end address.
#define KERNEL_TEMP_END_ADDRESS			0xFFC00000

//! Page tables area(4MB) start address.
#define PAGE_TABLE_AREA_START_ADDRESS		(0xFFC00000)
#define PAGE_TABLE_MAP		(0xFFC00000)

//! Page tables area end address. 0xFFC00000+0x3FF000 = 0xFFFFF000
	//因为我们把页目录映射到了最后
#define PAGE_DIR_TABLE_START_ADDRESS	\
		(PAGE_TABLE_AREA_START_ADDRESS + (PAGE_TABLE_AREA_START_ADDRESS / (1024)))
#define PAGE_DIR_MAP		(0xFFC00000 + (PAGE_TABLE_MAP / (1024)))


#endif /* end of  __MAP_H__ */