/*	$NetBSD: cpufunc.h,v 1.6 2004/01/23 04:03:38 simonb Exp $	*/

/*
 * Copyright (c) 1996 Matthias Pfaller.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Matthias Pfaller.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _NS532_CPUFUNC_H_
#define	_NS532_CPUFUNC_H_

/*
 * Load a mmu register.
 */
#define	lmr(reg, src) __asm __volatile("lmr " #reg ",%0" : : "g" (src))

/*
 * Store a mmu register.
 */
#define	smr(reg, dst) __asm __volatile("smr " #reg ",%0" : "=g" (dst) :)

/*
 * Load the FPU status register.
 */
#define	lfsr(src) __asm __volatile("lfsr %0" : : "g" (src))

/*
 * Store the FPU status register.
 */
#define	sfsr(src) __asm __volatile("sfsr %0" : "=g" (src) :)

/*
 * Load a processor register.
 */
#define	lprd(reg, src) __asm __volatile("lprd " #reg ",%0" : : "g" (src))
#define	lprw(reg, src) __asm __volatile("lprw " #reg ",%0" : : "g" (src))
#define	lprb(reg, src) __asm __volatile("lprb " #reg ",%0" : : "g" (src))

/*
 * Store a processor register.
 */
#define	sprd(reg, dst) __asm __volatile("sprd " #reg ",%0" : "=g" (dst) :)
#define	sprw(reg, dst) __asm __volatile("sprw " #reg ",%0" : "=g" ((short) (dst)) :)
#define	sprb(reg, dst) __asm __volatile("sprb " #reg ",%0" : "=g" ((char) (dst)) :)

/*
 * Move data. This can be used to force
 * gcc to load a register variable.
 */
#define	movd(src, dst) __asm __volatile("movd %1,%0" : "=g" (dst) : "g" (src))

/*
 * movs[bdw] for fast blockmoves.
 * movs[bdw](from, to, n) update "from" and "to".
 * movs[bdw]nu(from, to, n) do not update "from" and "to".
 */
#define	movs(type, from, to, n) \
	register int r0 __asm ("r0") = n; \
	register void *r1 __asm("r1") = from; \
	register void *r2 __asm("r2") = to; \
	__asm __volatile ("movs" type \
		: "+r" (r0), "+r" (r1), "+r" (r2) \
		: \
		: "memory" \
	);
#define	movs_update(type, from, to, n) do { \
		movs(type, from, to, n); \
		from = r1; to = r2; \
	} while (0)

#define	movs_noupdate(type, from, to, n) do { \
		movs(type, from, to, n); \
	} while (0)

#define	movsd(from, to, n)	movs_update("d", from, to, n)
#define	movsw(from, to, n)	movs_update("w", from, to, n)
#define	movsb(from, to, n)	movs_update("b", from, to, n)

#define	movsdnu(from, to, n)	movs_noupdate("d", from, to, n)
#define	movswnu(from, to, n)	movs_noupdate("w", from, to, n)
#define	movsbnu(from, to, n)	movs_noupdate("b", from, to, n)

/*
 * Invalidate data and/or instruction cache lines.
 */
#define	cinv(mode, adr) __asm __volatile("cinv " #mode ",%0" : : "g" (adr))

/*
 * Load the ptb. This loads ptb0 and ptb1 to
 * avoid a cpu-bug when using dual address
 * space instructions.
 */
#define	load_ptb(src) __asm __volatile("lmr ptb0,%0; lmr ptb1,%0" : : "g" (src))

/*
 * Flush tlb. Just to be save this flushes
 * kernelmode and usermode translations.
 */
#define	tlbflush() __asm __volatile("smr ptb0,r0; lmr ptb0,r0; lmr ptb1,r0" : : : "r0")
#define	tlbflush_entry(p) do { \
		lmr(ivar0, p); \
		lmr(ivar1, p); \
	} while(0)

/*
 * Trigger a T_BPT.
 */
#define	breakpoint() __asm __volatile("bpt")

/*
 * Bits in the cfg register.
 */
#define	CFG_I	0x0001		/* Enable vectored interrupts */
#define	CFG_F	0x0002		/* Enable floating-point instruction set */
#define	CFG_M	0x0004		/* Enable memory management instruction set */
#define	CFG_ONE	0x00f0		/* Must be one */
#define	CFG_DE	0x0100		/* Enable direct exception mode */
#define	CFG_DC	0x0200		/* Enable data cache */
#define	CFG_LDC	0x0400		/* Lock data cache */
#define	CFG_IC	0x0800		/* Enable instruction cache */
#define	CFG_LIC	0x1000		/* Lock instruction cache */
#define	CFG_PF	0x2000		/* Enable pipelined floating-point execution */

#endif /* !_NS532_CPUFUNC_H_ */