asm.h

/*-
 * Copyright (c) 2015-2018 Ruslan Bukin <[email protected]>
 * All rights reserved.
 *
 * Portions of this software were developed by SRI International and the
 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * Portions of this software were developed by the University of Cambridge
 * Computer Laboratory as part of the CTSRD Project, with support from the
 * UK Higher Education Innovation Fund (HEIF).
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#ifndef _MACHINE_ASM_H_
#define	_MACHINE_ASM_H_

#undef __FBSDID
#if !defined(lint) && !defined(STRIP_FBSDID)
#define	__FBSDID(s)	.ident s
#else
#define	__FBSDID(s)	/* nothing */
#endif /* not lint and not STRIP_FBSDID */

#define	_C_LABEL(x)	x

#define	ENTRY(sym)						\
	.text; .globl sym; .type sym,@function; .align 4; sym: .cfi_startproc;
#define	END(sym) .cfi_endproc; .size sym, . - sym

#define	EENTRY(sym)						\
	.globl	sym; sym:
#define	EEND(sym)

#define	WEAK_REFERENCE(sym, alias)				\
	.weak alias;						\
	.set alias,sym

#define	SET_FAULT_HANDLER(handler, tmp)					\
	ld	tmp, PC_CURTHREAD(tp);					\
	ld	tmp, TD_PCB(tmp);		/* Load the pcb */	\
	sd	handler, PCB_ONFAULT(tmp)	/* Set the handler */

#define	ENTER_USER_ACCESS(tmp)						\
	li	tmp, SSTATUS_SUM;					\
	csrs	sstatus, tmp

#define	EXIT_USER_ACCESS(tmp)						\
	li	tmp, SSTATUS_SUM;					\
	csrc	sstatus, tmp

#define	SBI_CALL(ext, func)						\
	li	a7, ext;						\
	li	a6, func;						\
	ecall

#endif /* _MACHINE_ASM_H_ */