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assym is only to be included by other .s files, and should never actually be assembled by itself. Reviewed by: imp, bdrewery (earlier) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D14180
121 lines
4.7 KiB
ArmAsm
121 lines
4.7 KiB
ArmAsm
/* $NetBSD: cpuswitch.S,v 1.41 2003/11/15 08:44:18 scw Exp $ */
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/*-
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* Copyright 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Steve C. Woodford for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1994-1998 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* cpuswitch.S
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*
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* cpu switching functions
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*
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* Created : 15/10/94
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*
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*/
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#include "assym.inc"
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#include <machine/asm.h>
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#include <machine/asmacros.h>
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#include <machine/armreg.h>
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#include <machine/vfp.h>
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__FBSDID("$FreeBSD$");
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#ifdef VFP
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.fpu vfp /* allow VFP instructions */
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#endif
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ENTRY(savectx)
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stmfd sp!, {lr}
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sub sp, sp, #4
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/* Store all the registers in the thread's pcb */
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add r3, r0, #(PCB_R4)
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stmia r3, {r4-r12, sp, lr, pc}
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#ifdef VFP
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fmrx r2, fpexc /* If the VFP is enabled */
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tst r2, #(VFPEXC_EN) /* the current thread has */
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movne r1, #1 /* used it, so go save */
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addne r0, r0, #(PCB_VFPSTATE) /* the state into the PCB */
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blne _C_LABEL(vfp_store) /* and disable the VFP. */
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#endif
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add sp, sp, #4;
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ldmfd sp!, {pc}
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END(savectx)
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ENTRY(fork_trampoline)
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STOP_UNWINDING /* EABI: Don't unwind beyond the thread enty point. */
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mov fp, #0 /* OABI: Stack traceback via fp stops here. */
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mov r2, sp
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mov r1, r5
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mov r0, r4
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ldr lr, =swi_exit /* Go finish forking, then return */
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b _C_LABEL(fork_exit) /* to userland via swi_exit code. */
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END(fork_trampoline)
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