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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/powerpc/booke/mp_cpudep.c
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2008-2009 Semihalf, Rafal Jaworowski

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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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 *

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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 THE AUTHOR ``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 THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 */

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#include <sys/param.h>

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#include <sys/systm.h>

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#include <sys/kernel.h>

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#include <sys/bus.h>

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#include <sys/pcpu.h>

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#include <sys/proc.h>

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#include <sys/sched.h>

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#include <sys/smp.h>

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#include <machine/pcb.h>

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#include <machine/psl.h>

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#include <machine/smp.h>

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#include <machine/spr.h>

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extern void dcache_enable(void);

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extern void dcache_inval(void);

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extern void icache_enable(void);

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extern void icache_inval(void);

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volatile void *ap_pcpu;

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uintptr_t

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cpudep_ap_bootstrap(void)

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{

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	uint32_t msr, csr;

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	uintptr_t sp;

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	/* Enable L1 caches */

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	csr = mfspr(SPR_L1CSR0);

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	if ((csr & L1CSR0_DCE) == 0) {

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		dcache_inval();

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		dcache_enable();

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	}

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	csr = mfspr(SPR_L1CSR1);

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	if ((csr & L1CSR1_ICE) == 0) {

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		icache_inval();

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		icache_enable();

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	}

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	/* Set MSR */

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#ifdef __powerpc64__

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	msr = PSL_CM | PSL_ME;

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#else

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	msr = PSL_ME;

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#endif

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	mtmsr(msr);

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	/* Assign pcpu fields, return ptr to this AP's idle thread kstack */

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	pcpup->pc_curthread = pcpup->pc_idlethread;

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#ifdef __powerpc64__

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	__asm __volatile("mr 13,%0" :: "r"(pcpup->pc_curthread));

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#else

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	__asm __volatile("mr 2,%0" :: "r"(pcpup->pc_curthread));

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#endif

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	pcpup->pc_curpcb = pcpup->pc_curthread->td_pcb;

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	sp = pcpup->pc_curpcb->pcb_sp;

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	schedinit_ap();

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	/* XXX shouldn't the pcb_sp be checked/forced for alignment here?? */

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	return (sp);

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}

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void

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cpudep_ap_setup(void)

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{

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}

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