asm-generic: add legacy I/O header files

#ifndef __ASM_GENERIC_DMA_H

#define __ASM_GENERIC_DMA_H

/*

 * This file traditionally describes the i8237 PC style DMA controller.

 * Most architectures don't have these any more and can get the minimal

 * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.

 *

 * Some code relies on seeing MAX_DMA_ADDRESS though.

 */

#define MAX_DMA_ADDRESS PAGE_OFFSET

extern int request_dma(unsigned int dmanr, const char *device_id);

extern void free_dma(unsigned int dmanr);

#endif /* __ASM_GENERIC_DMA_H */

#ifndef __ASM_GENERIC_HW_IRQ_H

#define __ASM_GENERIC_HW_IRQ_H

/*

 * hw_irq.h has internal declarations for the low-level interrupt

 * controller, like the original i8259A.

 * In general, this is not needed for new architectures.

 */

#endif /* __ASM_GENERIC_HW_IRQ_H */

#ifndef __ASM_GENERIC_PARPORT_H

#define __ASM_GENERIC_PARPORT_H

/*

 * An ISA bus may have i8255 parallel ports at well-known

 * locations in the I/O space, which are scanned by

 * parport_pc_find_isa_ports.

 *

 * Without ISA support, the driver will only attach

 * to devices on the PCI bus.

 */

static int __devinit parport_pc_find_isa_ports(int autoirq, int autodma);

static int __devinit parport_pc_find_nonpci_ports(int autoirq, int autodma)

{

#ifdef CONFIG_ISA

	return parport_pc_find_isa_ports(autoirq, autodma);

#else

	return 0;

#endif

}

#endif /* __ASM_GENERIC_PARPORT_H */

#ifndef __ASM_GENERIC_SERIAL_H

#define __ASM_GENERIC_SERIAL_H

/*

 * This should not be an architecture specific #define, oh well.

 *

 * Traditionally, it just describes i8250 and related serial ports

 * that have this clock rate.

 */

#define BASE_BAUD (1843200 / 16)

#endif /* __ASM_GENERIC_SERIAL_H */

#ifndef __ASM_GENERIC_TIMEX_H

#define __ASM_GENERIC_TIMEX_H

/*

 * If you have a cycle counter, return the value here.

 */

typedef unsigned long cycles_t;

#ifndef get_cycles

static inline cycles_t get_cycles(void)

{

	return 0;

}

#endif

/*

 * Architectures are encouraged to implement read_current_timer

 * and define this in order to avoid the expensive delay loop

 * calibration during boot.

 */

#undef ARCH_HAS_READ_CURRENT_TIMER

#endif /* __ASM_GENERIC_TIMEX_H */