Disintegrate asm/system.h for PA-RISC

#define _ASM_PARISC_ATOMIC_H_

#include <linux/types.h>

#include <asm/system.h>

/*

 * Atomic operations that C can't guarantee us.  Useful for

#ifndef __PARISC_BARRIER_H

#define __PARISC_BARRIER_H

/*

** This is simply the barrier() macro from linux/kernel.h but when serial.c

** uses tqueue.h uses smp_mb() defined using barrier(), linux/kernel.h

** hasn't yet been included yet so it fails, thus repeating the macro here.

**

** PA-RISC architecture allows for weakly ordered memory accesses although

** none of the processors use it. There is a strong ordered bit that is

** set in the O-bit of the page directory entry. Operating systems that

** can not tolerate out of order accesses should set this bit when mapping

** pages. The O-bit of the PSW should also be set to 1 (I don't believe any

** of the processor implemented the PSW O-bit). The PCX-W ERS states that

** the TLB O-bit is not implemented so the page directory does not need to

** have the O-bit set when mapping pages (section 3.1). This section also

** states that the PSW Y, Z, G, and O bits are not implemented.

** So it looks like nothing needs to be done for parisc-linux (yet).

** (thanks to chada for the above comment -ggg)

**

** The __asm__ op below simple prevents gcc/ld from reordering

** instructions across the mb() "call".

*/

#define mb()		__asm__ __volatile__("":::"memory")	/* barrier() */

#define rmb()		mb()

#define wmb()		mb()

#define smp_mb()	mb()

#define smp_rmb()	mb()

#define smp_wmb()	mb()

#define smp_read_barrier_depends()	do { } while(0)

#define read_barrier_depends()		do { } while(0)

#define set_mb(var, value)		do { var = value; mb(); } while (0)

#endif /* __PARISC_BARRIER_H */

#ifndef _PARISC_DELAY_H

#define _PARISC_DELAY_H

#include <asm/system.h>    /* for mfctl() */

#include <asm/special_insns.h>    /* for mfctl() */

#include <asm/processor.h> /* for boot_cpu_data */

#define _ASM_DMA_H

#include <asm/io.h>		/* need byte IO */

#include <asm/system.h>	

#define dma_outb	outb

#define dma_inb		inb

#ifndef __PARISC_EXEC_H

#define __PARISC_EXEC_H

#define arch_align_stack(x) (x)

#endif /* __PARISC_EXEC_H */