2 * Copyright (c) 2015 Nathan Whitehorn
3 * Copyright (c) 2017-2018 Semihalf
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
41 #include <machine/bus.h>
42 #include <machine/cpu.h>
43 #include <machine/hid.h>
44 #include <machine/platformvar.h>
45 #include <machine/pmap.h>
46 #include <machine/rtas.h>
47 #include <machine/smp.h>
48 #include <machine/spr.h>
49 #include <machine/trap.h>
51 #include <dev/ofw/openfirm.h>
52 #include <machine/ofw_machdep.h>
53 #include <powerpc/aim/mmu_oea64.h>
55 #include "platform_if.h"
62 static int powernv_probe(platform_t);
63 static int powernv_attach(platform_t);
64 void powernv_mem_regions(platform_t, struct mem_region *phys, int *physsz,
65 struct mem_region *avail, int *availsz);
66 static u_long powernv_timebase_freq(platform_t, struct cpuref *cpuref);
67 static int powernv_smp_first_cpu(platform_t, struct cpuref *cpuref);
68 static int powernv_smp_next_cpu(platform_t, struct cpuref *cpuref);
69 static int powernv_smp_get_bsp(platform_t, struct cpuref *cpuref);
70 static void powernv_smp_ap_init(platform_t);
72 static int powernv_smp_start_cpu(platform_t, struct pcpu *cpu);
73 static struct cpu_group *powernv_smp_topo(platform_t plat);
75 static void powernv_reset(platform_t);
76 static void powernv_cpu_idle(sbintime_t sbt);
77 static int powernv_cpuref_init(void);
79 static platform_method_t powernv_methods[] = {
80 PLATFORMMETHOD(platform_probe, powernv_probe),
81 PLATFORMMETHOD(platform_attach, powernv_attach),
82 PLATFORMMETHOD(platform_mem_regions, powernv_mem_regions),
83 PLATFORMMETHOD(platform_timebase_freq, powernv_timebase_freq),
85 PLATFORMMETHOD(platform_smp_ap_init, powernv_smp_ap_init),
86 PLATFORMMETHOD(platform_smp_first_cpu, powernv_smp_first_cpu),
87 PLATFORMMETHOD(platform_smp_next_cpu, powernv_smp_next_cpu),
88 PLATFORMMETHOD(platform_smp_get_bsp, powernv_smp_get_bsp),
90 PLATFORMMETHOD(platform_smp_start_cpu, powernv_smp_start_cpu),
91 PLATFORMMETHOD(platform_smp_topo, powernv_smp_topo),
94 PLATFORMMETHOD(platform_reset, powernv_reset),
99 static platform_def_t powernv_platform = {
105 static struct cpuref platform_cpuref[MAXCPU];
106 static int platform_cpuref_cnt;
107 static int platform_cpuref_valid;
109 PLATFORM_DEF(powernv_platform);
111 static uint64_t powernv_boot_pir;
114 powernv_probe(platform_t plat)
116 if (opal_check() == 0)
117 return (BUS_PROBE_SPECIFIC);
123 powernv_attach(platform_t plat)
125 uint32_t nptlp, shift = 0, slb_encoding = 0;
126 int32_t lp_size, lp_encoding;
133 /* Ping OPAL again just to make sure */
136 #if BYTE_ORDER == LITTLE_ENDIAN
137 opal_call(OPAL_REINIT_CPUS, 2 /* Little endian */);
139 opal_call(OPAL_REINIT_CPUS, 1 /* Big endian */);
142 if (cpu_idle_hook == NULL)
143 cpu_idle_hook = powernv_cpu_idle;
145 powernv_boot_pir = mfspr(SPR_PIR);
147 /* LPID must not be altered when PSL_DR or PSL_IR is set */
149 mtmsr(msr & ~(PSL_DR | PSL_IR));
151 /* Direct interrupts to SRR instead of HSRR and reset LPCR otherwise */
155 mtspr(SPR_LPCR, LPCR_LPES);
161 powernv_smp_ap_init(plat);
163 powernv_cpuref_init();
165 /* Set SLB count from device tree */
169 res = OF_getprop(cpu, "name", buf, sizeof(buf));
170 if (res > 0 && strcmp(buf, "cpus") == 0)
179 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
180 if (res > 0 && strcmp(buf, "cpu") == 0)
187 res = OF_getencprop(cpu, "ibm,slb-size", &prop, sizeof(prop));
192 * Scan the large page size property for PAPR compatible machines.
193 * See PAPR D.5 Changes to Section 5.1.4, 'CPU Node Properties'
194 * for the encoding of the property.
197 len = OF_getproplen(cpu, "ibm,segment-page-sizes");
200 * We have to use a variable length array on the stack
201 * since we have very limited stack space.
203 pcell_t arr[len/sizeof(cell_t)];
204 res = OF_getencprop(cpu, "ibm,segment-page-sizes", arr,
210 slb_encoding = arr[idx + 1];
211 nptlp = arr[idx + 2];
214 while (len > 0 && nptlp) {
216 lp_encoding = arr[idx+1];
217 if (slb_encoding == SLBV_L && lp_encoding == 0)
224 if (nptlp && slb_encoding == SLBV_L && lp_encoding == 0)
229 panic("Standard large pages (SLB[L] = 1, PTE[LP] = 0) "
230 "not supported by this system.");
232 moea64_large_page_shift = shift;
233 moea64_large_page_size = 1ULL << lp_size;
242 powernv_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
243 struct mem_region *avail, int *availsz)
246 ofw_mem_regions(phys, physsz, avail, availsz);
250 powernv_timebase_freq(platform_t plat, struct cpuref *cpuref)
253 phandle_t cpu, dev, root;
258 dev = OF_child(root);
260 res = OF_getprop(dev, "name", buf, sizeof(buf));
261 if (res > 0 && strcmp(buf, "cpus") == 0)
266 for (cpu = OF_child(dev); cpu != 0; cpu = OF_peer(cpu)) {
267 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
268 if (res > 0 && strcmp(buf, "cpu") == 0)
274 OF_getencprop(cpu, "timebase-frequency", &ticks, sizeof(ticks));
277 panic("Unable to determine timebase frequency!");
284 powernv_cpuref_init(void)
288 int a, res, tmp_cpuref_cnt;
289 static struct cpuref tmp_cpuref[MAXCPU];
290 cell_t interrupt_servers[32];
293 if (platform_cpuref_valid)
299 res = OF_getprop(dev, "name", buf, sizeof(buf));
300 if (res > 0 && strcmp(buf, "cpus") == 0)
307 for (cpu = OF_child(dev); cpu != 0; cpu = OF_peer(cpu)) {
308 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
309 if (res > 0 && strcmp(buf, "cpu") == 0) {
310 res = OF_getproplen(cpu, "ibm,ppc-interrupt-server#s");
314 OF_getencprop(cpu, "ibm,ppc-interrupt-server#s",
315 interrupt_servers, res);
317 for (a = 0; a < res/sizeof(cell_t); a++) {
318 tmp_cpuref[tmp_cpuref_cnt].cr_hwref = interrupt_servers[a];
319 tmp_cpuref[tmp_cpuref_cnt].cr_cpuid = tmp_cpuref_cnt;
321 if (interrupt_servers[a] == (uint32_t)powernv_boot_pir)
322 bsp = tmp_cpuref_cnt;
330 /* Map IDs, so BSP has CPUID 0 regardless of hwref */
331 for (a = bsp; a < tmp_cpuref_cnt; a++) {
332 platform_cpuref[platform_cpuref_cnt].cr_hwref = tmp_cpuref[a].cr_hwref;
333 platform_cpuref[platform_cpuref_cnt].cr_cpuid = platform_cpuref_cnt;
334 platform_cpuref_cnt++;
336 for (a = 0; a < bsp; a++) {
337 platform_cpuref[platform_cpuref_cnt].cr_hwref = tmp_cpuref[a].cr_hwref;
338 platform_cpuref[platform_cpuref_cnt].cr_cpuid = platform_cpuref_cnt;
339 platform_cpuref_cnt++;
342 platform_cpuref_valid = 1;
348 powernv_smp_first_cpu(platform_t plat, struct cpuref *cpuref)
350 if (platform_cpuref_valid == 0)
353 cpuref->cr_cpuid = 0;
354 cpuref->cr_hwref = platform_cpuref[0].cr_hwref;
360 powernv_smp_next_cpu(platform_t plat, struct cpuref *cpuref)
364 if (platform_cpuref_valid == 0)
367 id = cpuref->cr_cpuid + 1;
368 if (id >= platform_cpuref_cnt)
371 cpuref->cr_cpuid = platform_cpuref[id].cr_cpuid;
372 cpuref->cr_hwref = platform_cpuref[id].cr_hwref;
378 powernv_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
381 cpuref->cr_cpuid = platform_cpuref[0].cr_cpuid;
382 cpuref->cr_hwref = platform_cpuref[0].cr_hwref;
388 powernv_smp_start_cpu(platform_t plat, struct pcpu *pc)
395 result = opal_call(OPAL_START_CPU, pc->pc_hwref, EXC_RST);
396 if (result != OPAL_SUCCESS) {
397 printf("OPAL error (%d): unable to start AP %d\n",
398 result, (int)pc->pc_hwref);
405 static struct cpu_group *
406 powernv_smp_topo(platform_t plat)
409 phandle_t cpu, dev, root;
414 dev = OF_child(root);
416 res = OF_getprop(dev, "name", buf, sizeof(buf));
417 if (res > 0 && strcmp(buf, "cpus") == 0)
423 for (cpu = OF_child(dev); cpu != 0; cpu = OF_peer(cpu)) {
424 res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
425 if (res <= 0 || strcmp(buf, "cpu") != 0)
428 res = OF_getproplen(cpu, "ibm,ppc-interrupt-server#s");
431 nthreads = res / sizeof(cell_t);
437 if (mp_ncpus % nthreads != 0) {
438 printf("WARNING: Irregular SMP topology. Performance may be "
439 "suboptimal (%d threads, %d on first core)\n",
441 return (smp_topo_none());
444 /* Don't do anything fancier for non-threaded SMP */
446 return (smp_topo_none());
448 return (smp_topo_1level(CG_SHARE_L1, nthreads, CG_FLAG_SMT));
454 powernv_reset(platform_t platform)
457 opal_call(OPAL_CEC_REBOOT);
461 powernv_smp_ap_init(platform_t platform)
466 powernv_cpu_idle(sbintime_t sbt)