422ec2ace1
to working but still needs some work to properly switch the full context (such as saving the fpu registers, switch stacks, etc.). Also, remove some dead code that was mixed in.
108 lines
4.3 KiB
ArmAsm
108 lines
4.3 KiB
ArmAsm
/* $FreeBSD$ */
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/* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
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/*
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* Copyright (C) 2001 Benno Rice
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "assym.s"
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#include <sys/syscall.h>
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#include <machine/trap.h>
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#include <machine/param.h>
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#include <machine/pmap.h>
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#include <machine/psl.h>
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#include <machine/asm.h>
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/*
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* void cpu_switch()
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* Find a runnable thread and switch to it.
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*/
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ENTRY(cpu_switch)
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mflr %r30
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mfsprg %r3,%r0 /* Get the globaldata pointer */
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lwz %r4,GD_CURTHREAD(%r3) /* Get the current thread */
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lwz %r3,TD_PCB(%r4) /* Get a pointer to the PCB */
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stmw %r14,PCB_CONTEXT(%r3) /* Save the non-volatile GP regs */
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mfcr %r4 /* Save the condition register */
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stw %r4,PCB_CR(%r3)
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bl choosethread /* Find a new thread to run */
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mr %r14,$r3 /* Save off the (struct thread *) */
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bl pmap_activate /* Activate the new address space */
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mtlr %r30
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mfsprg %r4,%r0 /* Get the globaldata pointer */
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stw %r14,GD_CURTHREAD(%r4) /* Store new current thread */
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lwz %r4,TD_PCB(%r14) /* Grab the new PCB */
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lmw %r14,PCB_CONTEXT(%r4) /* Load the non-volatile GP regs */
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lwz %r5,PCB_CR(%r4) /* Load the condition register */
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mtcr %r5
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blr
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/*
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* savectx(pcb)
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* Update pcb, saving current processor state
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*/
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ENTRY(savectx)
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stmw %r14,PCB_CONTEXT(%r3) /* Save the non-volatile GP regs */
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mfcr %r4 /* Save the condition register */
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stw %r4,PCB_CONTEXT(%r3)
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blr
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