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/* $FreeBSD$ */
/* $NetBSD: locore.s,v 1.47 1998/03/22 07:26:32 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <machine/asm.h>
#include <assym.s>
/**************************************************************************/
/*
* XentArith:
* System arithmetic trap entry point.
*/
PALVECT(XentArith) /* setup frame, save registers */
/* a0, a1, & a2 already set up */
ldiq a3, ALPHA_KENTRY_ARITH
mov sp, a4 ; .loc 1 __LINE__
CALL(trap)
jmp zero, exception_return
END(XentArith)
/**************************************************************************/
/*
* XentIF:
* System instruction fault trap entry point.
*/
PALVECT(XentIF) /* setup frame, save registers */
/* a0, a1, & a2 already set up */
ldiq a3, ALPHA_KENTRY_IF
mov sp, a4 ; .loc 1 __LINE__
CALL(trap)
jmp zero, exception_return
END(XentIF)
/**************************************************************************/
/*
* XentInt:
* System interrupt entry point.
*/
PALVECT(XentInt) /* setup frame, save registers */
/* a0, a1, & a2 already set up */
mov sp, a3 ; .loc 1 __LINE__
CALL(interrupt)
jmp zero, exception_return
END(XentInt)
/**************************************************************************/
/*
* XentMM:
* System memory management fault entry point.
*/
PALVECT(XentMM) /* setup frame, save registers */
/* a0, a1, & a2 already set up */
ldiq a3, ALPHA_KENTRY_MM
mov sp, a4 ; .loc 1 __LINE__
CALL(trap)
jmp zero, exception_return
END(XentMM)
/**************************************************************************/
/*
* XentSys:
* System call entry point.
*/
ESETUP(XentSys) ; .loc 1 __LINE__
stq v0,(FRAME_V0*8)(sp) /* in case we need to restart */
stq s0,(FRAME_S0*8)(sp)
stq s1,(FRAME_S1*8)(sp)
stq s2,(FRAME_S2*8)(sp)
stq s3,(FRAME_S3*8)(sp)
stq s4,(FRAME_S4*8)(sp)
stq s5,(FRAME_S5*8)(sp)
stq s6,(FRAME_S6*8)(sp)
stq a0,(FRAME_A0*8)(sp)
stq a1,(FRAME_A1*8)(sp)
stq a2,(FRAME_A2*8)(sp)
stq a3,(FRAME_A3*8)(sp)
stq a4,(FRAME_A4*8)(sp)
stq a5,(FRAME_A5*8)(sp)
stq ra,(FRAME_RA*8)(sp)
/* syscall number, passed in v0, is first arg, frame pointer second */
mov v0,a0
mov sp,a1 ; .loc 1 __LINE__
CALL(syscall)
jmp zero, exception_return
END(XentSys)
/**************************************************************************/
/*
* XentUna:
* System unaligned access entry point.
*/
LEAF(XentUna, 3) /* XXX should be NESTED */
.set noat
lda sp,-(FRAME_SW_SIZE*8)(sp)
stq at_reg,(FRAME_AT*8)(sp)
.set at
stq ra,(FRAME_RA*8)(sp)
bsr ra, exception_save_regs /* jmp/CALL trashes pv/t12 */
/* a0, a1, & a2 already set up */
ldiq a3, ALPHA_KENTRY_UNA
mov sp, a4 ; .loc 1 __LINE__
CALL(trap)
jmp zero, exception_return
END(XentUna)
/**************************************************************************/
/*
* console 'restart' routine to be placed in HWRPB.
*/
LEAF(XentRestart, 1) /* XXX should be NESTED */
.set noat
lda sp,-(FRAME_SIZE*8)(sp)
stq at_reg,(FRAME_AT*8)(sp)
.set at
stq v0,(FRAME_V0*8)(sp)
stq a3,(FRAME_A3*8)(sp)
stq a4,(FRAME_A4*8)(sp)
stq a5,(FRAME_A5*8)(sp)
stq s0,(FRAME_S0*8)(sp)
stq s1,(FRAME_S1*8)(sp)
stq s2,(FRAME_S2*8)(sp)
stq s3,(FRAME_S3*8)(sp)
stq s4,(FRAME_S4*8)(sp)
stq s5,(FRAME_S5*8)(sp)
stq s6,(FRAME_S6*8)(sp)
stq t0,(FRAME_T0*8)(sp)
stq t1,(FRAME_T1*8)(sp)
stq t2,(FRAME_T2*8)(sp)
stq t3,(FRAME_T3*8)(sp)
stq t4,(FRAME_T4*8)(sp)
stq t5,(FRAME_T5*8)(sp)
stq t6,(FRAME_T6*8)(sp)
stq t7,(FRAME_T7*8)(sp)
stq t8,(FRAME_T8*8)(sp)
stq t9,(FRAME_T9*8)(sp)
stq t10,(FRAME_T10*8)(sp)
stq t11,(FRAME_T11*8)(sp)
stq t12,(FRAME_T12*8)(sp)
stq ra,(FRAME_RA*8)(sp)
br pv,LXconsole_restart1
LXconsole_restart1: LDGP(pv)
ldq a0,(FRAME_RA*8)(sp) /* a0 = ra */
ldq a1,(FRAME_T11*8)(sp) /* a1 = ai */
ldq a2,(FRAME_T12*8)(sp) /* a2 = pv */
CALL(console_restart)
call_pal PAL_halt
END(XentRestart)
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