/* $NetBSD: locore_c.c,v 1.32 2020/06/30 16:20:02 maxv Exp $ */ /*- * Copyright (c) 1996, 1997, 2002, 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)Locore.c */ /*- * Copyright (c) 1993, 1994, 1995, 1996, 1997 * Charles M. Hannum. All rights reserved. * Copyright (c) 1992 Terrence R. Lambert. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)Locore.c */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: locore_c.c,v 1.32 2020/06/30 16:20:02 maxv Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/cpu.h> #include <sys/sched.h> #include <sys/proc.h> #include <sys/ras.h> #include <uvm/uvm.h> #include <uvm/uvm_extern.h> #include <sh3/locore.h> #include <sh3/pmap.h> #include <sh3/mmu_sh3.h> #include <sh3/mmu_sh4.h> void cpu_switch_prepare(struct lwp *, struct lwp *); void (*__sh_switch_resume)(struct lwp *); /* * Called from cpu_switchto after olwp's state has been saved. * Prepare context switch to nlwp. */ void cpu_switch_prepare(struct lwp *olwp, struct lwp *nlwp) { struct proc *p = nlwp->l_proc; /* Check for Restartable Atomic Sequences. */ if (p->p_raslist != NULL) { void *pc; pc = ras_lookup(p, (void *)nlwp->l_md.md_regs->tf_spc); if (pc != (void *) -1) nlwp->l_md.md_regs->tf_spc = (int) pc; } } /* * When no processes are on the run queue, wait for something to come * ready. Separate function for profiling. */ void cpu_idle(void) { __asm volatile("sleep"); } #ifndef P1_STACK #ifdef SH3 /* * Nothing to do for sh3. */ void sh3_switch_setup(struct lwp *l) { return; } #endif /* SH3 */ #ifdef SH4 /* * Prepare kernel stack PTE table. sh4_switch_resume wires these PTEs. */ void sh4_switch_setup(struct lwp *l) { struct md_upte *md_upte; uint32_t vpn; pt_entry_t *pte; int i, e; md_upte = l->l_md.md_upte; vpn = sh3_trunc_page(uvm_lwp_getuarea(l)); e = SH4_UTLB_ENTRY - UPAGES; for (i = 0; i < UPAGES; ++i) { pte = __pmap_kpte_lookup(vpn); KDASSERT(pte && *pte != 0); /* Address array */ md_upte->addr = SH4_UTLB_AA | (e << SH4_UTLB_E_SHIFT); md_upte->data = vpn | SH4_UTLB_AA_D | SH4_UTLB_AA_V; ++md_upte; /* Data array */ md_upte->addr = SH4_UTLB_DA1 | (e << SH4_UTLB_E_SHIFT); md_upte->data = (*pte & PG_HW_BITS) | SH4_UTLB_DA1_D | SH4_UTLB_DA1_V; ++md_upte; vpn += PAGE_SIZE; ++e; } } #endif /* SH4 */ #endif /* !P1_STACK */
