468 lines
12 KiB
C
468 lines
12 KiB
C
/*-
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* Copyright (c) 1997 Berkeley Software Design, Inc. 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. Berkeley Software Design Inc's name may not be used to endorse or
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* 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 BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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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* from BSDI: locore.s,v 1.36.2.15 1999/08/23 22:34:41 cp Exp
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*/
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/*-
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* Copyright (c) 2002 Jake Burkholder.
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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 THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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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* $FreeBSD$
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*/
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/mutex.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_map.h>
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#include <dev/ofw/openfirm.h>
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#include <ddb/ddb.h>
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#include <machine/asi.h>
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#include <machine/atomic.h>
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#include <machine/md_var.h>
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#include <machine/metadata.h>
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#include <machine/ofw_machdep.h>
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#include <machine/smp.h>
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#include <machine/tick.h>
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#include <machine/tlb.h>
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#include <machine/tte.h>
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static ih_func_t cpu_ipi_ast;
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static ih_func_t cpu_ipi_stop;
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/*
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* Argument area used to pass data to non-boot processors as they start up.
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* This must be statically initialized with a known invalid upa module id,
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* since the other processors will use it before the boot cpu enters the
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* kernel.
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*/
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struct cpu_start_args cpu_start_args = { 0, -1, -1, 0, 0 };
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struct ipi_cache_args ipi_cache_args;
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struct ipi_tlb_args ipi_tlb_args;
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struct mtx ipi_mtx;
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vm_offset_t mp_tramp;
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u_int mp_boot_mid;
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static volatile u_int shutdown_cpus;
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void cpu_mp_unleash(void *);
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SYSINIT(cpu_mp_unleash, SI_SUB_SMP, SI_ORDER_FIRST, cpu_mp_unleash, NULL);
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vm_offset_t
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mp_tramp_alloc(void)
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{
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struct tte *tp;
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char *v;
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int i;
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v = OF_claim(NULL, PAGE_SIZE, PAGE_SIZE);
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if (v == NULL)
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panic("mp_tramp_alloc");
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bcopy(mp_tramp_code, v, mp_tramp_code_len);
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*(u_long *)(v + mp_tramp_tlb_slots) = kernel_tlb_slots;
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*(u_long *)(v + mp_tramp_func) = (u_long)mp_startup;
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tp = (struct tte *)(v + mp_tramp_code_len);
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for (i = 0; i < kernel_tlb_slots; i++) {
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tp[i].tte_vpn = TV_VPN(kernel_tlbs[i].te_va, TS_4M);
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tp[i].tte_data = TD_V | TD_4M | TD_PA(kernel_tlbs[i].te_pa) |
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TD_L | TD_CP | TD_CV | TD_P | TD_W;
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}
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for (i = 0; i < PAGE_SIZE; i += sizeof(long))
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flush(v + i);
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return (vm_offset_t)v;
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}
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/*
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* Probe for other cpus.
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*/
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int
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cpu_mp_probe(void)
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{
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phandle_t child;
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phandle_t root;
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char buf[128];
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int cpus;
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all_cpus = 1 << PCPU_GET(cpuid);
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mp_boot_mid = PCPU_GET(mid);
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mp_ncpus = 1;
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cpus = 0;
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root = OF_peer(0);
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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if (OF_getprop(child, "device_type", buf, sizeof(buf)) > 0 &&
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strcmp(buf, "cpu") == 0)
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cpus++;
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}
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mp_maxid = cpus;
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return (cpus > 1);
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}
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static void
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sun4u_startcpu(phandle_t cpu, void *func, u_long arg)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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cell_t cpu;
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cell_t func;
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cell_t arg;
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} args = {
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(cell_t)"SUNW,start-cpu",
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3,
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0,
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0,
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0,
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0
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};
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args.cpu = cpu;
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args.func = (cell_t)func;
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args.arg = (cell_t)arg;
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openfirmware(&args);
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}
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/*
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* Stop the calling CPU.
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*/
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static void
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sun4u_stopself(void)
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{
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static struct {
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cell_t name;
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cell_t nargs;
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cell_t nreturns;
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} args = {
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(cell_t)"SUNW,stop-self",
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0,
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0,
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};
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openfirmware_exit(&args);
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panic("sun4u_stopself: failed.");
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}
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/*
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* Fire up any non-boot processors.
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*/
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void
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cpu_mp_start(void)
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{
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volatile struct cpu_start_args *csa;
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struct pcpu *pc;
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phandle_t child;
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phandle_t root;
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vm_offset_t va;
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char buf[128];
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u_int clock;
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int cpuid;
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u_int mid;
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u_long s;
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mtx_init(&ipi_mtx, "ipi", NULL, MTX_SPIN);
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intr_setup(PIL_AST, cpu_ipi_ast, -1, NULL, NULL);
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intr_setup(PIL_RENDEZVOUS, (ih_func_t *)smp_rendezvous_action,
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-1, NULL, NULL);
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intr_setup(PIL_STOP, cpu_ipi_stop, -1, NULL, NULL);
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root = OF_peer(0);
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csa = &cpu_start_args;
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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if (OF_getprop(child, "device_type", buf, sizeof(buf)) <= 0 ||
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strcmp(buf, "cpu") != 0)
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continue;
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if (OF_getprop(child, "upa-portid", &mid, sizeof(mid)) <= 0 &&
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OF_getprop(child, "portid", &mid, sizeof(mid)) <= 0)
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panic("cpu_mp_start: can't get module id");
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if (mid == mp_boot_mid)
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continue;
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if (OF_getprop(child, "clock-frequency", &clock,
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sizeof(clock)) <= 0)
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panic("cpu_mp_start: can't get clock");
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csa->csa_state = 0;
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sun4u_startcpu(child, (void *)mp_tramp, 0);
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s = intr_disable();
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while (csa->csa_state != CPU_CLKSYNC)
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;
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membar(StoreLoad);
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csa->csa_tick = rd(tick);
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while (csa->csa_state != CPU_INIT)
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;
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csa->csa_tick = 0;
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intr_restore(s);
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cpuid = mp_ncpus++;
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cpu_identify(csa->csa_ver, clock, cpuid);
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va = kmem_alloc(kernel_map, PCPU_PAGES * PAGE_SIZE);
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pc = (struct pcpu *)(va + (PCPU_PAGES * PAGE_SIZE)) - 1;
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pcpu_init(pc, cpuid, sizeof(*pc));
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pc->pc_addr = va;
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pc->pc_mid = mid;
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pc->pc_node = child;
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all_cpus |= 1 << cpuid;
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}
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PCPU_SET(other_cpus, all_cpus & ~(1 << PCPU_GET(cpuid)));
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smp_active = 1;
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}
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void
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cpu_mp_announce(void)
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{
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}
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void
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cpu_mp_unleash(void *v)
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{
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volatile struct cpu_start_args *csa;
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struct pcpu *pc;
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vm_offset_t va;
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vm_paddr_t pa;
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u_int ctx_min;
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u_int ctx_inc;
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u_long s;
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int i;
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ctx_min = TLB_CTX_USER_MIN;
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ctx_inc = (TLB_CTX_USER_MAX - 1) / mp_ncpus;
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csa = &cpu_start_args;
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csa->csa_count = mp_ncpus;
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SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
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pc->pc_tlb_ctx = ctx_min;
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pc->pc_tlb_ctx_min = ctx_min;
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pc->pc_tlb_ctx_max = ctx_min + ctx_inc;
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ctx_min += ctx_inc;
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if (pc->pc_cpuid == PCPU_GET(cpuid))
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continue;
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KASSERT(pc->pc_idlethread != NULL,
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("cpu_mp_unleash: idlethread"));
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KASSERT(pc->pc_curthread == pc->pc_idlethread,
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("cpu_mp_unleash: curthread"));
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pc->pc_curpcb = pc->pc_curthread->td_pcb;
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for (i = 0; i < PCPU_PAGES; i++) {
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va = pc->pc_addr + i * PAGE_SIZE;
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pa = pmap_kextract(va);
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if (pa == 0)
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panic("cpu_mp_unleash: pmap_kextract\n");
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csa->csa_ttes[i].tte_vpn = TV_VPN(va, TS_8K);
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csa->csa_ttes[i].tte_data = TD_V | TD_8K | TD_PA(pa) |
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TD_L | TD_CP | TD_CV | TD_P | TD_W;
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}
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csa->csa_state = 0;
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csa->csa_pcpu = pc->pc_addr;
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csa->csa_mid = pc->pc_mid;
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s = intr_disable();
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while (csa->csa_state != CPU_BOOTSTRAP)
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;
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intr_restore(s);
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}
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membar(StoreLoad);
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csa->csa_count = 0;
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smp_started = 1;
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}
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void
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cpu_mp_bootstrap(struct pcpu *pc)
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{
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volatile struct cpu_start_args *csa;
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csa = &cpu_start_args;
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pmap_map_tsb();
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cpu_setregs(pc);
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tick_start_ap();
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smp_cpus++;
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PCPU_SET(other_cpus, all_cpus & ~(1 << PCPU_GET(cpuid)));
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printf("SMP: AP CPU #%d Launched!\n", PCPU_GET(cpuid));
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csa->csa_count--;
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membar(StoreLoad);
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csa->csa_state = CPU_BOOTSTRAP;
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while (csa->csa_count != 0)
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;
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binuptime(PCPU_PTR(switchtime));
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PCPU_SET(switchticks, ticks);
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/* ok, now grab sched_lock and enter the scheduler */
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mtx_lock_spin(&sched_lock);
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cpu_throw(NULL, choosethread()); /* doesn't return */
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}
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void
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cpu_mp_shutdown(void)
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{
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int i;
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critical_enter();
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shutdown_cpus = PCPU_GET(other_cpus);
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if (stopped_cpus != PCPU_GET(other_cpus)) /* XXX */
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stop_cpus(stopped_cpus ^ PCPU_GET(other_cpus));
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i = 0;
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while (shutdown_cpus != 0) {
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if (i++ > 100000) {
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printf("timeout shutting down CPUs.\n");
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break;
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}
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}
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/* XXX: delay a bit to allow the CPUs to actually enter the PROM. */
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DELAY(100000);
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critical_exit();
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}
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static void
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cpu_ipi_ast(struct trapframe *tf)
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{
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}
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static void
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cpu_ipi_stop(struct trapframe *tf)
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{
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CTR1(KTR_SMP, "cpu_ipi_stop: stopped %d", PCPU_GET(cpuid));
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atomic_set_acq_int(&stopped_cpus, PCPU_GET(cpumask));
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while ((started_cpus & PCPU_GET(cpumask)) == 0) {
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if ((shutdown_cpus & PCPU_GET(cpumask)) != 0) {
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atomic_clear_int(&shutdown_cpus, PCPU_GET(cpumask));
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sun4u_stopself();
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}
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}
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atomic_clear_rel_int(&started_cpus, PCPU_GET(cpumask));
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atomic_clear_rel_int(&stopped_cpus, PCPU_GET(cpumask));
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CTR1(KTR_SMP, "cpu_ipi_stop: restarted %d", PCPU_GET(cpuid));
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}
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void
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cpu_ipi_selected(u_int cpus, u_long d0, u_long d1, u_long d2)
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{
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struct pcpu *pc;
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u_int cpu;
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while (cpus) {
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cpu = ffs(cpus) - 1;
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cpus &= ~(1 << cpu);
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pc = pcpu_find(cpu);
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cpu_ipi_send(pc->pc_mid, d0, d1, d2);
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}
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}
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void
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cpu_ipi_send(u_int mid, u_long d0, u_long d1, u_long d2)
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{
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u_long s;
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int i;
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KASSERT((ldxa(0, ASI_INTR_DISPATCH_STATUS) & IDR_BUSY) == 0,
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("ipi_send: outstanding dispatch"));
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for (i = 0; i < IPI_RETRIES; i++) {
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s = intr_disable();
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stxa(AA_SDB_INTR_D0, ASI_SDB_INTR_W, d0);
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stxa(AA_SDB_INTR_D1, ASI_SDB_INTR_W, d1);
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stxa(AA_SDB_INTR_D2, ASI_SDB_INTR_W, d2);
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stxa(AA_INTR_SEND | (mid << 14), ASI_SDB_INTR_W, 0);
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membar(Sync);
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while (ldxa(0, ASI_INTR_DISPATCH_STATUS) & IDR_BUSY)
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;
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intr_restore(s);
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if ((ldxa(0, ASI_INTR_DISPATCH_STATUS) & IDR_NACK) == 0)
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return;
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}
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if (
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#ifdef DDB
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db_active ||
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#endif
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panicstr != NULL)
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printf("ipi_send: couldn't send ipi to module %u\n", mid);
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else
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panic("ipi_send: couldn't send ipi");
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}
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void
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ipi_selected(u_int cpus, u_int ipi)
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{
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cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_level, ipi);
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}
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void
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ipi_all(u_int ipi)
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{
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panic("ipi_all");
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}
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void
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ipi_all_but_self(u_int ipi)
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{
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cpu_ipi_selected(PCPU_GET(other_cpus), 0, (u_long)tl_ipi_level, ipi);
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}
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