xref: /src/lib/libpthread/arch/m68k/pthread_md.h

/*	$NetBSD: pthread_md.h,v 1.5 2008/02/10 18:50:55 ad Exp $	*/

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Nathan J. Williams.
 *
 * 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 the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Based on the i386 version.
 */

#ifndef _LIB_PTHREAD_M68K_MD_H
#define _LIB_PTHREAD_M68K_MD_H


static inline long
pthread__sp(void)
{
	long ret;
	__asm("movl %%sp, %0" : "=g" (ret));

	return ret;
}

#define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_A7])
#define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_PC])

/*
 * Usable stack space below the ucontext_t.
 * See comment in pthread_switch.S about STACK_SWITCH.
 */
#define STACKSPACE	12	/* room for 3 integer values */

/*
 * Conversions between struct reg and struct mcontext. Used by
 * libpthread_dbg.
 */

#define PTHREAD_UCONTEXT_TO_REG(reg, uc) do {				\
	memcpy(&(reg)->r_regs, &(uc)->uc_mcontext.__gregs,		\
		_REG_PC * sizeof(__greg_t));				\
	(reg)->r_sr = (uc)->uc_mcontext.__gregs[_REG_PS];		\
	(reg)->r_pc = (uc)->uc_mcontext.__gregs[_REG_PC];		\
	} while (/*CONSTCOND*/0)

#define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
	memcpy(&(uc)->uc_mcontext.__gregs, &(reg)->r_regs,		\
		_REG_PC * sizeof(__greg_t));				\
	(uc)->uc_mcontext.__gregs[_REG_PS] = (reg)->r_sr;		\
	(uc)->uc_mcontext.__gregs[_REG_PC] = (reg)->r_pc;		\
	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;       	\
	} while (/*CONSTCOND*/0)

#define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) do {       			\
	memcpy(&(freg)->r_regs, &(uc)->uc_mcontext.__fpregs.__fp_fpregs,\
		8 * 3 * sizeof(int));					\
	(freg)->r_fpcr = (uc)->uc_mcontext.__fpregs.__fp_pcr;		\
	(freg)->r_fpsr = (uc)->uc_mcontext.__fpregs.__fp_psr;		\
	(freg)->r_fpiar = (uc)->uc_mcontext.__fpregs.__fp_piaddr;      	\
	} while (/*CONSTCOND*/0)

#define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do {       	       		\
	memcpy(&(uc)->uc_mcontext.__fpregs.__fp_fpregs, &(freg)->r_regs,\
		8 * 3 * sizeof(int));					\
	(uc)->uc_mcontext.__fpregs.__fp_pcr = (freg)->r_fpcr;		\
	(uc)->uc_mcontext.__fpregs.__fp_psr = (freg)->r_fpsr;		\
	(uc)->uc_mcontext.__fpregs.__fp_piaddr = (freg)->r_fpiar;      	\
	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
	} while (/*CONSTCOND*/0)

/* m68k will not go SMP */
#define	PTHREAD__ATOMIC_IS_MEMBAR

#endif /* _LIB_PTHREAD_M68K_MD_H */