2 * Copyright (c) 2001-2005 Marcel Moolenaar
3 * Copyright (c) 2000 Doug Rabson
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include "opt_kstack_pages.h"
33 #include <sys/param.h>
34 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/kernel.h>
43 #include <sys/sched.h>
45 #include <sys/sysctl.h>
50 #include <vm/vm_extern.h>
51 #include <vm/vm_kern.h>
53 #include <machine/atomic.h>
54 #include <machine/cpu.h>
55 #include <machine/fpu.h>
56 #include <machine/intr.h>
57 #include <machine/mca.h>
58 #include <machine/md_var.h>
59 #include <machine/pal.h>
60 #include <machine/pcb.h>
61 #include <machine/pmap.h>
62 #include <machine/sal.h>
63 #include <machine/smp.h>
64 #include <i386/include/specialreg.h>
66 MALLOC_DEFINE(M_SMP, "SMP", "SMP related allocations");
68 void ia64_ap_startup(void);
70 #define LID_SAPIC_ID(x) ((int)((x) >> 24) & 0xff)
71 #define LID_SAPIC_EID(x) ((int)((x) >> 16) & 0xff)
72 #define LID_SAPIC_SET(id,eid) (((id & 0xff) << 8 | (eid & 0xff)) << 16);
73 #define LID_SAPIC_MASK 0xffff0000UL
75 /* Variables used by os_boot_rendez and ia64_ap_startup */
79 volatile int ap_delay;
80 volatile int ap_awake;
83 static void cpu_mp_unleash(void *);
89 return smp_topo_none();
95 volatile struct ia64_interrupt_block *ib = IA64_INTERRUPT_BLOCK;
99 ia64_set_k4((intptr_t)pcpup);
102 ia64_set_pta(ap_vhpt + (1 << 8) + (pmap_vhpt_log2size << 2) + 1);
111 ia64_set_fpsr(IA64_FPSR_DEFAULT);
113 /* Wait until it's time for us to be unleashed */
117 /* Initialize curthread. */
118 KASSERT(PCPU_GET(idlethread) != NULL, ("no idle thread"));
119 PCPU_SET(curthread, PCPU_GET(idlethread));
122 * Get and save the CPU specific MCA records. Should we get the
123 * MCA state for each processor, or just the CMC state?
125 ia64_mca_save_state(SAL_INFO_MCA);
126 ia64_mca_save_state(SAL_INFO_CMC);
132 CTR1(KTR_SMP, "SMP: cpu%d launched", PCPU_GET(cpuid));
134 /* Acknowledge and EOI all interrupts. */
135 vector = ia64_get_ivr();
136 while (vector != 15) {
139 vector = (int)ib->ib_inta;
142 vector = ia64_get_ivr();
146 /* kick off the clock on this AP */
158 cpu_mp_setmaxid(void)
162 * Count the number of processors in the system by walking the ACPI
163 * tables. Note that we record the actual number of processors, even
164 * if this is larger than MAXCPU. We only activate MAXCPU processors.
166 mp_ncpus = ia64_count_cpus();
169 * Set the largest cpuid we're going to use. This is necessary for
172 mp_maxid = min(mp_ncpus, MAXCPU) - 1;
180 * If there's only 1 processor, or we don't have a wake-up vector,
181 * we're not going to enable SMP. Note that no wake-up vector can
182 * also mean that the wake-up mechanism is not supported. In this
183 * case we can have multiple processors, but we simply can't wake
186 return (mp_ncpus > 1 && ipi_vector[IPI_AP_WAKEUP] != 0);
190 cpu_mp_add(u_int acpiid, u_int apicid, u_int apiceid)
195 /* Ignore any processor numbers outside our range */
196 if (acpiid > mp_maxid)
199 KASSERT((all_cpus & (1UL << acpiid)) == 0,
200 ("%s: cpu%d already in CPU map", __func__, acpiid));
202 lid = LID_SAPIC_SET(apicid, apiceid);
204 if ((ia64_get_lid() & LID_SAPIC_MASK) == lid) {
206 ("%s: the BSP must be cpu0", __func__));
210 pc = (struct pcpu *)malloc(sizeof(*pc), M_SMP, M_WAITOK);
211 pcpu_init(pc, acpiid, sizeof(*pc));
216 all_cpus |= (1UL << acpiid);
225 for (i = 0; i <= mp_maxid; i++) {
228 printf("cpu%d: SAPIC Id=%x, SAPIC Eid=%x", i,
229 LID_SAPIC_ID(pc->pc_lid),
230 LID_SAPIC_EID(pc->pc_lid));
246 SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
247 pc->pc_current_pmap = kernel_pmap;
248 pc->pc_other_cpus = all_cpus & ~pc->pc_cpumask;
249 if (pc->pc_cpuid > 0) {
251 ap_stack = malloc(KSTACK_PAGES * PAGE_SIZE, M_SMP,
253 ap_vhpt = pmap_vhpt_base[pc->pc_cpuid];
258 printf("SMP: waking up cpu%d\n", pc->pc_cpuid);
260 ipi_send(pc, IPI_AP_WAKEUP);
264 } while (--ap_delay > 0);
265 pc->pc_awake = ap_awake;
268 printf("SMP: WARNING: cpu%d did not wake up\n",
275 cpu_mp_unleash(void *dummy)
285 SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
294 while (ap_awake != smp_cpus)
297 if (smp_cpus != cpus || cpus != mp_ncpus) {
298 printf("SMP: %d CPUs found; %d CPUs usable; %d CPUs woken\n",
299 mp_ncpus, cpus, smp_cpus);
307 * send an IPI to a set of cpus.
310 ipi_selected(cpumask_t cpus, int ipi)
314 SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
315 if (cpus & pc->pc_cpumask)
321 * send an IPI to all CPUs EXCEPT myself.
324 ipi_all_but_self(int ipi)
328 SLIST_FOREACH(pc, &cpuhead, pc_allcpu) {
335 * Send an IPI to the specified processor. The lid parameter holds the
336 * cr.lid (CR64) contents of the target processor. Only the id and eid
337 * fields are used here.
340 ipi_send(struct pcpu *cpu, int ipi)
342 volatile uint64_t *pipi;
345 pipi = __MEMIO_ADDR(ia64_lapic_address |
346 ((cpu->pc_lid & LID_SAPIC_MASK) >> 12));
347 vector = (uint64_t)(ipi_vector[ipi] & 0xff);
348 KASSERT(vector != 0, ("IPI %d is not assigned a vector", ipi));
350 CTR3(KTR_SMP, "ipi_send(%p, %ld), cpuid=%d", pipi, vector,
354 SYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, cpu_mp_unleash, NULL);