pm.c

来自「适合KS8695X」· C语言 代码 · 共 540 行 · 第 1/2 页

}

void PMAPI PM_freePhysicalAddr(void *ptr,ulong limit)
{
    /* TODO: This function will free a physical memory mapping previously */
    /*       allocated with PM_mapPhysicalAddr() if at all possible. If */
    /*       you can't free physical memory mappings, simply do nothing. */
}

ulong PMAPI PM_getPhysicalAddr(void *p)
{
    /* TODO: This function should find the physical address of a linear */
    /*       address. */
    return 0xFFFFFFFFUL;
}

void PMAPI PM_sleep(ulong milliseconds)
{
    /* TODO: Put the process to sleep for milliseconds */
}

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;
	}
    return 0;
}

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;
}

void * PMAPI PM_mallocShared(long size)
{
    /* TODO: This is used to allocate memory that is shared between process */
    /*       that all access the common Nucleus drivers via a common display */
    /*       driver DLL. If your OS does not support shared memory (or if */
    /*       the display driver does not need to allocate shared memory */
    /*       for each process address space), this should just call PM_malloc. */
    return PM_malloc(size);
}

void PMAPI PM_freeShared(void *ptr)
{
    /* TODO: Free the shared memory block. This will be called in the context */
    /*       of the original calling process that allocated the shared */
    /*       memory with PM_mallocShared. Simply call free if you do not */
    /*       need this. */
    PM_free(ptr);
}

void * PMAPI PM_mapToProcess(void *base,ulong limit)
{
    /* TODO: This function is used to map a physical memory mapping */
    /*       previously allocated with PM_mapPhysicalAddr into the */
    /*       address space of the calling process. If the memory mapping */
    /*       allocated by PM_mapPhysicalAddr is global to all processes, */
    /*       simply return the pointer. */
    return base;
}

void * PMAPI PM_mapRealPointer(uint r_seg,uint r_off)
{
    /* No BIOS access on the BeOS */
    return NULL;
}

void * PMAPI PM_allocRealSeg(uint size,uint *r_seg,uint *r_off)
{
    /* No BIOS access on the BeOS */
    return NULL;
}

void PMAPI PM_freeRealSeg(void *mem)
{
    /* No BIOS access on the BeOS */
}

void PMAPI DPMI_int86(int intno, DPMI_regs *regs)
{
    /* No BIOS access on the BeOS */
}

int PMAPI PM_int86(int intno, RMREGS *in, RMREGS *out)
{
    /* No BIOS access on the BeOS */
    return 0;
}

int PMAPI PM_int86x(int intno, RMREGS *in, RMREGS *out,
    RMSREGS *sregs)
{
    /* No BIOS access on the BeOS */
    return 0;
}

void PMAPI PM_callRealMode(uint seg,uint off, RMREGS *in,
    RMSREGS *sregs)
{
    /* No BIOS access on the BeOS */
}

void PMAPI PM_availableMemory(ulong *physical,ulong *total)
{
    /* TODO: Report the amount of available memory, both the amount of */
    /*       physical memory left and the amount of virtual memory left. */
    /*       If the OS does not provide these services, report 0's. */
    *physical = *total = 0;
}

void * PMAPI PM_allocLockedMem(uint size,ulong *physAddr,ibool contiguous,ibool below16Meg)
{
    /* TODO: Allocate a block of locked, physical memory of the specified */
    /*       size. This is used for bus master operations. If this is not */
    /*       supported by the OS, return NULL and bus mastering will not */
    /*       be used. */
    return NULL;
}

void PMAPI PM_freeLockedMem(void *p,uint size,ibool contiguous)
{
    /* TODO: Free a memory block allocated with PM_allocLockedMem. */
}

void PMAPI PM_setBankA(int bank)
{
    /* No BIOS access on the BeOS */
}

void PMAPI PM_setBankAB(int bank)
{
    /* No BIOS access on the BeOS */
}

void PMAPI PM_setCRTStart(int x,int y,int waitVRT)
{
    /* No BIOS access on the BeOS */
}

ibool PMAPI PM_enableWriteCombine(ulong base,ulong length,uint type)
{
    /* TODO: This function should enable Pentium Pro and Pentium II MTRR */
    /*       write combining for the passed in physical memory base address */
    /*       and length. Normally this is done via calls to an OS specific */
    /*       device driver as this can only be done at ring 0. */
    /* */
    /* NOTE: This is a *very* important function to implement! If you do */
    /*       not implement, graphics performance on the latest Intel chips */
    /*       will be severly impaired. For sample code that can be used */
    /*       directly in a ring 0 device driver, see the MSDOS implementation */
    /*       which includes assembler code to do this directly (if the */
    /*       program is running at ring 0). */
    return false;
}

ibool PMAPI PM_doBIOSPOST(ushort axVal,ulong BIOSPhysAddr,void *mappedBIOS)
{
    /* TODO: This function is used to run the BIOS POST code on a secondary */
    /*       controller to initialise it for use. This is not necessary */
    /*       for multi-controller operation, but it will make it a lot */
    /*       more convenicent for end users (otherwise they have to boot */
    /*       the system once with the secondary controller as primary, and */
    /*       then boot with both controllers installed). */
    /* */
    /*       Even if you don't support full BIOS access, it would be */
    /*       adviseable to be able to POST the secondary controllers in the */
    /*       system using this function as a minimum requirement. Some */
    /*       graphics hardware has registers that contain values that only */
    /*       the BIOS knows about, which makes bring up a card from cold */
    /*       reset difficult if the BIOS has not POST'ed it. */
    return false;
}

/****************************************************************************
REMARKS:
Function to find the first file matching a search criteria in a directory.
****************************************************************************/
ulong PMAPI PM_findFirstFile(
    const char *filename,
    PM_findData *findData)
{
    (void)filename;
    (void)findData;
    return PM_FILE_INVALID;
}

/****************************************************************************
REMARKS:
Function to find the next file matching a search criteria in a directory.
****************************************************************************/
ibool PMAPI PM_findNextFile(
    ulong handle,
    PM_findData *findData)
{
    (void)handle;
    (void)findData;
    return false;
}

/****************************************************************************
REMARKS:
Function to close the find process
****************************************************************************/
void PMAPI PM_findClose(
    ulong handle)
{
    (void)handle;
}

/****************************************************************************
REMARKS:
Function to determine if a drive is a valid drive or not. Under Unix this
function will return false for anything except a value of 3 (considered
the root drive, and equivalent to C: for non-Unix systems). The drive
numbering is:

    1   - Drive A:
    2   - Drive B:
    3   - Drive C:
    etc

****************************************************************************/
ibool PMAPI PM_driveValid(
    char drive)
{
    if (drive == 3)
	return true;
    return false;
}

/****************************************************************************
REMARKS:
Function to get the current working directory for the specififed drive.
Under Unix this will always return the current working directory regardless
of what the value of 'drive' is.
****************************************************************************/
void PMAPI PM_getdcwd(
    int drive,
    char *dir,
    int len)
{
    (void)drive;
    getcwd(dir,len);
}

/****************************************************************************
REMARKS:
Function to change the file attributes for a specific file.
****************************************************************************/
void PMAPI PM_setFileAttr(
    const char *filename,
    uint attrib)
{
    /* TODO: Set the file attributes for a file */
    (void)filename;
    (void)attrib;
}