pm.c

该源码是AT91rm9200的U-boot原代码。

    PM_backslash(path);
    strcat(path,"config");
    return path;
}

/****************************************************************************
REMARKS:
Return a unique identifier for the machine if possible.
****************************************************************************/
const char * PMAPI PM_getUniqueID(void)
{
    return PM_getMachineName();
}

/****************************************************************************
REMARKS:
Get the name of the machine on the network.
****************************************************************************/
const char * PMAPI PM_getMachineName(void)
{
    static char name[256];

    if (REG_queryString(szMachineNameKey,szMachineName,name,sizeof(name)))
        return name;
    if (REG_queryString(szMachineNameKeyNT,szMachineName,name,sizeof(name)))
        return name;
    return "Unknown";
}

/****************************************************************************
REMARKS:
Check if a key has been pressed.
****************************************************************************/
int PMAPI PM_kbhit(void)
{
    // Not used in NT drivers
    return true;
}

/****************************************************************************
REMARKS:
Wait for and return the next keypress.
****************************************************************************/
int PMAPI PM_getch(void)
{
    // Not used in NT drivers
    return 0xD;
}

/****************************************************************************
REMARKS:
Open a console for output to the screen, creating the main event handling
window if necessary.
****************************************************************************/
PM_HWND PMAPI PM_openConsole(
    PM_HWND hwndUser,
    int device,
    int xRes,
    int yRes,
    int bpp,
    ibool fullScreen)
{
    // Not used in NT drivers
    (void)hwndUser;
    (void)device;
    (void)xRes;
    (void)yRes;
    (void)bpp;
    (void)fullScreen;
    return NULL;
}

/****************************************************************************
REMARKS:
Find the size of the console state buffer.
****************************************************************************/
int PMAPI PM_getConsoleStateSize(void)
{
    // Not used in NT drivers
    return 1;
}

/****************************************************************************
REMARKS:
Save the state of the console.
****************************************************************************/
void PMAPI PM_saveConsoleState(
    void *stateBuf,
    PM_HWND hwndConsole)
{
    // Not used in NT drivers
    (void)stateBuf;
    (void)hwndConsole;
}

/****************************************************************************
REMARKS:
Set the suspend application callback for the fullscreen console.
****************************************************************************/
void PMAPI PM_setSuspendAppCallback(
    PM_saveState_cb saveState)
{
    // Not used in NT drivers
    (void)saveState;
}

/****************************************************************************
REMARKS:
Restore the console state.
****************************************************************************/
void PMAPI PM_restoreConsoleState(
    const void *stateBuf,
    PM_HWND hwndConsole)
{
    // Not used in NT drivers
    (void)stateBuf;
    (void)hwndConsole;
}

/****************************************************************************
REMARKS:
Close the fullscreen console.
****************************************************************************/
void PMAPI PM_closeConsole(
    PM_HWND hwndConsole)
{
    // Not used in NT drivers
    (void)hwndConsole;
}

/****************************************************************************
REMARKS:
Set the location of the OS console cursor.
****************************************************************************/
void PMAPI PM_setOSCursorLocation(
    int x,
    int y)
{
    /* Nothing to do for Windows */
    (void)x;
    (void)y;
}

/****************************************************************************
REMARKS:
Set the width of the OS console.
****************************************************************************/
void PMAPI PM_setOSScreenWidth(
    int width,
    int height)
{
    /* Nothing to do for Windows */
    (void)width;
    (void)height;
}

/****************************************************************************
REMARKS:
Maps a shared memory block into process address space. Does nothing since
the memory blocks are already globally mapped into all processes.
****************************************************************************/
void * PMAPI PM_mapToProcess(
    void *base,
    ulong limit)
{
    // Not used anymore
    (void)base;
    (void)limit;
    return NULL;
}

/****************************************************************************
REMARKS:
Execute the POST on the secondary BIOS for a controller.
****************************************************************************/
ibool PMAPI PM_doBIOSPOST(
    ushort axVal,
    ulong BIOSPhysAddr,
    void *mappedBIOS,
    ulong BIOSLen)
{
    // This may not be possible in NT and should be done by the OS anyway
    (void)axVal;
    (void)BIOSPhysAddr;
    (void)mappedBIOS;
    (void)BIOSLen;
    return false;
}

/****************************************************************************
REMARKS:
Return a pointer to the real mode BIOS data area.
****************************************************************************/
void * PMAPI PM_getBIOSPointer(void)
{
    // Note that on NT this probably does not do what we expect!
    return PM_mapPhysicalAddr(0x400, 0x1000, true);
}

/****************************************************************************
REMARKS:
Return a pointer to 0xA0000 physical VGA graphics framebuffer.
****************************************************************************/
void * PMAPI PM_getA0000Pointer(void)
{
    return PM_mapPhysicalAddr(0xA0000,0xFFFF,false);
}

/****************************************************************************
REMARKS:
Sleep for the specified number of milliseconds.
****************************************************************************/
void PMAPI PM_sleep(
    ulong milliseconds)
{
    // We never use this in NT drivers
    (void)milliseconds;
}

/****************************************************************************
REMARKS:
Return the base I/O port for the specified COM port.
****************************************************************************/
int PMAPI PM_getCOMPort(int port)
{
    // TODO: Re-code this to determine real values using the Plug and Play
    //       manager for the OS.
    switch (port) {
        case 0: return 0x3F8;
        case 1: return 0x2F8;
        case 2: return 0x3E8;
        case 3: return 0x2E8;
        }
    return 0;
}

/****************************************************************************
REMARKS:
Return the base I/O port for the specified LPT port.
****************************************************************************/
int PMAPI PM_getLPTPort(int port)
{
    // TODO: Re-code this to determine real values using the Plug and Play
    //       manager for the OS.
    switch (port) {
        case 0: return 0x3BC;
        case 1: return 0x378;
        case 2: return 0x278;
        }
    return 0;
}

/****************************************************************************
REMARKS:
Returns available memory. Not possible under Windows.
****************************************************************************/
void PMAPI PM_availableMemory(
    ulong *physical,
    ulong *total)
{
    *physical = *total = 0;
}

/****************************************************************************
REMARKS:
OS specific shared libraries not supported inside a VxD
****************************************************************************/
PM_MODULE PMAPI PM_loadLibrary(
    const char *szDLLName)
{
    // Not used in NT drivers
    (void)szDLLName;
    return NULL;
}

/****************************************************************************
REMARKS:
OS specific shared libraries not supported inside a VxD
****************************************************************************/
void * PMAPI PM_getProcAddress(
    PM_MODULE hModule,
    const char *szProcName)
{
    // Not used in NT drivers
    (void)hModule;
    (void)szProcName;
    return NULL;
}

/****************************************************************************
REMARKS:
OS specific shared libraries not supported inside a VxD
****************************************************************************/
void PMAPI PM_freeLibrary(
    PM_MODULE hModule)
{
    // Not used in NT drivers
    (void)hModule;
}

/****************************************************************************
REMARKS:
Function to find the first file matching a search criteria in a directory.
****************************************************************************/
void *PMAPI PM_findFirstFile(
    const char *filename,
    PM_findData *findData)
{
    // TODO: This function should start a directory enumeration search
    //       given the filename (with wildcards). The data should be
    //       converted and returned in the findData standard form.
    (void)filename;