CpuId - 紀錄一下

因為 CE 6.0 沒有辦法 SetKMode，所以只好... 寫一個 driver，然後 load 進去..,

這就是 copy 自 tcpmp getcpuid 的 code 後，run 起來：

• 我們的： 4117B362,1D152152,0,0
• 測試的： 410FB764,1D992992,0,0

第一個，cpu id

4117B362:ref(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0360f/CACEDHJG.html)
所以是 ARM1136, rev2

410FB764: ref (http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0360f/CACEDHJG.html)
所以是 ARM1176 , rev 4

第二個，cache type register

ref : http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0211k/I67616.html

• [31:29] : always 0
• [28:25] : ctype - cache type b1110 means "write back","register 7 operation","format C"
• [24] : separate D and I cache
• [23:12] : D cache size
• [11:0] : I cache size

其中 D 和 I cache size encoding format:

• [11] : P
• [10:9] : always 0
• [8:6] : size
• [5:3] : association (way)
  
• [2] : M
• [1:0] Length

所以
1D152152 : 16K, 4 way, len=32 bytes.
1D992992: 32K, 4 way, len=32 bytes.

---

driver code

GETID.C:
#include <windows.h>
#include <drvlib.h>


//----- Code Control -----
#define GID_DEBUG

#ifdef DEBUG
DBGPARAM dpCurSettings = { TEXT("Getid"), {
TEXT("Verbose"), TEXT(""), TEXT(""), TEXT(""),
TEXT(""), TEXT(""), TEXT(""), TEXT(""),
TEXT(""), TEXT(""), TEXT(""), TEXT(""),
TEXT(""), TEXT(""), TEXT(""), TEXT("")},
0x00000000
};
#endif

extern void GetCpuId(int,DWORD*);

void SafeGetCpuId(int Id, DWORD* p)
{
memset(p,0,4*sizeof(DWORD));
GetCpuId(Id,p);
}


//--- GID_Init
DWORD GID_Init(DWORD dwContext)
{
DWORD CpuId[4];
DWORD dwErr;
TCHAR outmsg[60];

RETAILMSG(1, (TEXT("[GID] GID_Init+\r\n")));

SafeGetCpuId(0,CpuId);
RETAILMSG(1,(TEXT("%X,%X,%X,%X\r\n"),CpuId[0],CpuId[1],CpuId[2],CpuId[3]));
swprintf(outmsg,TEXT("%X,%X,%X,%X"),CpuId[0],CpuId[1],CpuId[2],CpuId[3]);

MessageBox(NULL,outmsg,TEXT("GID"),MB_OK);


RETAILMSG(1, (TEXT("[GID] GID_Init OK \r\n")));
return TRUE;

}



//--- GID_Deinit
BOOL GID_Deinit(DWORD dwContext)
{
RETAILMSG(1, (TEXT("[GID] GID_Deinit+\r\n")));


return TRUE;
}



//--- GID_Open
DWORD GID_Open(DWORD dwData, DWORD dwAccess, DWORD dwShareMode)
{
RETAILMSG(1, (TEXT("[GID] GID_Open+\r\n")));

return dwData;
}



//--- GID_Close
BOOL GID_Close(DWORD Handle)
{
RETAILMSG(1, (TEXT("[GID] GID_Close+\r\n")));

return TRUE;
}



//--- GID_Read
DWORD GID_Read(DWORD Handle, LPVOID pBuffer, DWORD dwNumBytes)
{
RETAILMSG(1, (TEXT("[GID] GID_Read+\r\n")));
return 0;
}



//--- GID_Write
DWORD GID_Write(DWORD Handle, LPCVOID pBuffer, DWORD dwNumBytes)
{
RETAILMSG(1, (TEXT("[GID] GID_Write+\r\n")));


return 0;
}



//--- GID_Seek
DWORD GID_Seek(DWORD Handle, long lDistance, DWORD dwMoveMethod)
{
RETAILMSG(1, (TEXT("[GID] GID_Seek+\r\n")));

return (DWORD) -1;
}



//--- GID_IOControl
BOOL GID_IOControl(
DWORD Handle,
DWORD dwCode,
PBYTE pBufIn,
DWORD dwLenIn,
PBYTE pBufOut,
DWORD dwLenOut,
PDWORD pdwActualOut
)
{

RETAILMSG(1, (TEXT("[GID] GID_IOControl+\r\n")));
return (FALSE);
}

BOOL
GID_DllEntry(
HINSTANCE hinstDll, /*@parm Instance pointer. */
DWORD dwReason, /*@parm Reason routine is called. */
LPVOID lpReserved /*@parm system parameter. */
)
{
if (dwReason == DLL_PROCESS_ATTACH)
{
DisableThreadLibraryCalls((HMODULE) hinstDll);
}


return (TRUE);
}


arm.s
INCLUDE kxarm.h

EXPORT GetCpuId

TEXTAREA

LEAF_ENTRY GetCpuId
export GetCpuId
mrs r0,cpsr

and r0,r0,#15
cmp r0,#15
bne UserMode
mrc p15,0,r0,c0,c0,0
nop
nop
mrc p15,0,r2,c0,c0,1
nop
nop
str r0,[r1,#0]
str r2,[r1,#4]
UserMode
mov pc,lr

ref (http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0360f/CACEDHJG.html) CpuID 取的是 opcode2 = 0 和 1 : cpu id 跟 cache type.
GETID.DEF
LIBRARY getid

EXPORTS
GID_Init
GID_Deinit
GID_Open
GID_Close
GID_Read
GID_Write
GID_IOControl

sources

TARGETNAME=getid
TARGETTYPE=DYNLINK
RELEASETYPE=PLATFORM

DLLENTRY=GID_DllEntry
DEFFILE=$(_TARGETPLATROOT)\SRC\DRIVERS\getid\getid.def

PREPROCESSDEFFILE=1
SYNCHRONIZE_DRAIN=1
WINCEREL=1

TARGETLIBS= \
$(_COMMONSDKROOT)\LIB\$(_CPUINDPATH)\coredll.lib \

SOURCELIBS= \

SOURCES= \
getid.c \
arm.s


load driver 的程式就是以前哪個 activedriverex( ). 改一下 dll name 就可以

---

ref http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0211k/I67616.html
用

c0, Core feature ID registers

好像可以得到更多 cpu feature