www.pudn.com > vxworks0108.rar > vmLib.h

/* vmLib.h - header for architecture independent mmu interface */



#ifndef __INCvmLibh
#define __INCvmLibh

#ifdef __cplusplus
extern "C" {
#endif

#include "vxWorks.h"
#include "mmu603lib.h"


/* status codes */

#define S_vmLib_NOT_PAGE_ALIGNED		(M_vmLib | 1)
#define S_vmLib_BAD_STATE_PARAM			(M_vmLib | 2)
#define S_vmLib_BAD_MASK_PARAM			(M_vmLib | 3)
#define S_vmLib_ADDR_IN_GLOBAL_SPACE		(M_vmLib | 4)
#define S_vmLib_TEXT_PROTECTION_UNAVAILABLE	(M_vmLib | 5)
#if (CPU_FAMILY == ARM)
#define S_vmLib_NO_FREE_REGIONS			(M_vmLib | 6)
#define S_vmLib_ADDRS_NOT_EQUAL			(M_vmLib | 7)
#endif

/* physical memory descriptor is used to map virtual memory in sysLib 
 * and usrConfig.
 */

typedef struct phys_mem_desc
    {
    void *virtualAddr;
    void *physicalAddr;
    UINT len;
    UINT initialStateMask;      /* mask parameter to vmStateSet */
    UINT initialState;          /* state parameter to vmStateSet */
    } PHYS_MEM_DESC;

IMPORT PHYS_MEM_DESC sysPhysMemDesc[];
IMPORT int sysPhysMemDescNumEnt;



/* state mask constants for vmStateSet vmStateGet. These
 * constants define the bit fields in the page state. 
 */

#define VM_STATE_MASK_VALID                     0x03
#define VM_STATE_MASK_WRITABLE                  0x0c
#define VM_STATE_MASK_CACHEABLE                 0x30
#define VM_STATE_MASK_MEM_COHERENCY		0x40
#define VM_STATE_MASK_GUARDED			0x80

/* state mask constant for ARM: bufferable, not cacheable */

#define VM_STATE_MASK_BUFFERABLE		0x80

/* additional state mask constants for XScale: extended page table support */

#define VM_STATE_MASK_EX_CACHEABLE              0x40
#define VM_STATE_MASK_EX_BUFFERABLE		0xC0

/* state constants for vmStateSet and vmStateGet.  These
 * values are or'ed together to form the page state.  Additional
 * values may be defined by specific architectures below. 
 */

#define VM_STATE_VALID                          0x01
#define VM_STATE_VALID_NOT                      0x00
#define VM_STATE_WRITABLE                       0x04
#define VM_STATE_WRITABLE_NOT                   0x00
#define VM_STATE_CACHEABLE              	0x10
#define VM_STATE_CACHEABLE_NOT          	0x00

/* additional cache states for MC68040 and ARM710A */
#define VM_STATE_CACHEABLE_WRITETHROUGH		0x20

/* additional cache states for MC68040 */
#define VM_STATE_CACHEABLE_NOT_NON_SERIAL	0x30

/* additional cache states for MC68060 */
#define VM_STATE_CACHEABLE_NOT_IMPRECISE	0x30

/* additional cache states for the powerPc */
#define VM_STATE_MEM_COHERENCY			0x40
#define VM_STATE_MEM_COHERENCY_NOT		0x00
#define VM_STATE_GUARDED			0x80
#define VM_STATE_GUARDED_NOT			0x00
#define VM_STATE_ACCESS_NOT			0x08

/* since MEM_COHERENCY and GUARDED state bits are already added,
 * we use them for Pentium by renaming it as follows:
 *   VM_STATE_WBACK         = VM_STATE_MEM_COHERENCY
 *   VM_STATE_WBACK_NOT	    = VM_STATE_MEM_COHERENCY_NOT
 *   VM_STATE_GLOBAL        = VM_STATE_GUARDED
 *   VM_STATE_GLOBAL_NOT    = VM_STATE_GUARDED_NOT
 * their meanings are:
 *   VM_STATE_WBACK         = set page cache-write-back bit
 *   VM_STATE_WBACK_NOT     = not set page cache-write-back bit
 *   VM_STATE_GLOBAL        = set page global bit
 *   VM_STATE_GLOBAL_NOT    = not set page global bit
 */

#define VM_STATE_MASK_WBACK			VM_STATE_MASK_MEM_COHERENCY
#define VM_STATE_MASK_GLOBAL			VM_STATE_MASK_GUARDED
#define VM_STATE_WBACK				VM_STATE_MEM_COHERENCY
#define VM_STATE_WBACK_NOT			VM_STATE_MEM_COHERENCY_NOT
#define VM_STATE_GLOBAL				VM_STATE_GUARDED
#define VM_STATE_GLOBAL_NOT			VM_STATE_GUARDED_NOT

/* additional cache state for ARM: bufferable, not cacheable */

#define VM_STATE_BUFFERABLE			0x80
#define VM_STATE_BUFFERABLE_NOT			0x00

/* additional cache states for XScale: extended page table support */
#define VM_STATE_EX_CACHEABLE              	0x40
#define VM_STATE_EX_CACHEABLE_NOT          	0x00
#define VM_STATE_EX_BUFFERABLE			0xC0
#define VM_STATE_EX_BUFFERABLE_NOT		0x00

/* additional cache states for ARM SA-1100 */

#define VM_STATE_CACHEABLE_MINICACHE		0x30

/* additional device type states for sun1e */

#define VM_STATE_MASK_DEVICE_SPACE		0xc0

#define VM_STATE_DS_MEM				0x00
#define VM_STATE_DS_IO				0x40
#define VM_STATE_DS_VME_D16			0x80
#define VM_STATE_DS_VME_D32			0xc0



#endif /* __INCvmLibh */