memdef_depend.h

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	memdef.h
 *
 *	Memory map definitions
 */

#ifndef __SYS_MEMDEF_DEPEND_H__
#define __SYS_MEMDEF_DEPEND_H__

#include <tk/sysdef.h>

#define	PAGESIZE	4096		/* Page size (number of bytes) */

/*
 * Memory maps of T-Engine/S1C38000
 *
 * # Process-specific space
 *
 *   0x40000000 +-----------------------+
 *              | Program	        |
 *              | (text,data,bss)       |
 *              +-----------------------+   --
 *              | Local memory	        |   ^  Allocate logical space
 *              | User stack            |   |  by memory management.
 *              |                       |   v
 *   0x50000000 +-----------------------+   --
 *              | (Not used)            |*1
 *   0x7fffffff +-----------------------+
 *
 * # System space
 *
 *   0x80000000 +-----------------------+   --
 *              | Shared memory         |   ^
 *              | System memory	        |   |  Allocate logical space
 *              | Disk map	        |   |  by memory management.
 *              | Outer shell, driver   |   v
 *   0xc0000000 +-----------------------+   --
 *              | For program map   	|
 *   0xd0000000 +-----------------------+
 *              | For I/O space map     |
 *   0xe0000000 +-----------------------+
 *
 * # Physical space (directly can be seen from: logical address = physical address)
 *
 *   0x00000000 +-----------------------+   --
 *              | Monitor	        |   ^
 *              | ROM disk	        |   |	ROM area
 *   0x00800000 +-----------------------+   |
 *              | (for extension)       |*1 v
 *   0x01000000 +-----------------------+   --
 *              | (Open to user)        |*2
 *              | Peripheral device     |*2
 *   0x08000000 +-----------------------+
 *              | (Not used)            |*1
 *   0x10000000 +-----------------------+   --
 *              | Page directory        |   ^
 *              | Monitor, etc          |   |
 *              | SYSCONF               |   |	RAM area
 *              | DEVCONF               |   |
 *              +-----------------------+   |
 *              | Page frame	        |   |
 *              | Page table	        |   |
 *   0x12000000 +-----------------------+   +  <- Can be specified by SYSCONF:RealMemEnd
 *              | (for RAM extension)   |*1 v
 *   0x18000000 +-----------------------+   --
 *              | (Not used)            |*1
 *   0x40000000 +-----------------------+
 *
 *   0xe0000000 +-----------------------+
 *              | (Not used)            |*1
 *   0xe8000000 +-----------------------+
 *              | Built-in device       |*2
 *   0xffffffff +-----------------------+
 *
 * * In physical space areas, set the page table at system startup so that logical and
 *   physical addresses become identical (logical address = physical address). However,
 *   disable any user-level access.
 * * In areas indicated by *1, do not perform mapping and disable access.
 * * In areas indicated by *2, turn off cache and write buffer.
 */

/*
 * Conversion between physical and logical addresses in real memory area
 */
#define	toLogicalAddress(paddr)		(VP)(paddr)
#define	toPhysicalAddress(laddr)	(VP)(laddr)

/*
 * Range of address in real memory area
 */
#define	REALMEMORY_TOP			0x10000000U
#define	REALMEMORY_END			0x18000000U

/*
 * Range of address in local space (0x40000000  -  0x50000000)
 */
#define	LOCALSPACE_TOP			( TOP_PDIR_ENTRIES * 0x00100000U )
#define	LOCALSPACE_END			( (TOP_PDIR_ENTRIES + NUM_PDIR_ENTRIES) * 0x00100000U )

/*
 * Range of address in shared/system memory space
 */
#define	SYSSPACE_TOP			0x80000000U
#define	SYSSPACE_END			0xc0000000U

/*
 * Range of address in system program map space
 */
#define	SYSPRGSPACE_TOP			0xc0000000U
#define	SYSPRGSPACE_END			0xd0000000U

/*
 * Range of address in I/O space
 */
#define	IOSPACE_TOP			0xd0000000U
#define	IOSPACE_END			0xe0000000U

/*
 * Within ROM area: True
 */
#define	isROM(addr)			( (UW)(addr) < 0x01000000U )

/*
 * Within logical space: True
 */
#define	isLogicalSpace(addr)		(  ((UW)(addr) >= 0x40000000U) \
					&& ((UW)(addr) <  0xe0000000U) )

/*
 * Range of section corresponding to logical space
 */
#define	LOGICALSPACE_SECTION_TOP	( 0x40000000U / (1024 * 1024) )
#define	LOGICALSPACE_SECTION_END	( 0xe0000000U / (1024 * 1024) )

#endif