146b1fe92SAndrew Turner /*-
246b1fe92SAndrew Turner * Copyright (c) 2014 Robin Randhawa
346b1fe92SAndrew Turner * All rights reserved.
446b1fe92SAndrew Turner *
546b1fe92SAndrew Turner * Redistribution and use in source and binary forms, with or without
646b1fe92SAndrew Turner * modification, are permitted provided that the following conditions
746b1fe92SAndrew Turner * are met:
846b1fe92SAndrew Turner * 1. Redistributions of source code must retain the above copyright
946b1fe92SAndrew Turner * notice, this list of conditions and the following disclaimer.
1046b1fe92SAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright
1146b1fe92SAndrew Turner * notice, this list of conditions and the following disclaimer in the
1246b1fe92SAndrew Turner * documentation and/or other materials provided with the distribution.
1346b1fe92SAndrew Turner *
1446b1fe92SAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
1546b1fe92SAndrew Turner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1646b1fe92SAndrew Turner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1746b1fe92SAndrew Turner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1846b1fe92SAndrew Turner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1946b1fe92SAndrew Turner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2046b1fe92SAndrew Turner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2146b1fe92SAndrew Turner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2246b1fe92SAndrew Turner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2346b1fe92SAndrew Turner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2446b1fe92SAndrew Turner * SUCH DAMAGE.
2546b1fe92SAndrew Turner *
2646b1fe92SAndrew Turner */
2746b1fe92SAndrew Turner
2846b1fe92SAndrew Turner /*
2946b1fe92SAndrew Turner * This implements support for ARM's Power State Co-ordination Interface
3046b1fe92SAndrew Turner * [PSCI]. The implementation adheres to version 0.2 of the PSCI specification
3146b1fe92SAndrew Turner * but also supports v0.1. PSCI standardizes operations such as system reset, CPU
3246b1fe92SAndrew Turner * on/off/suspend. PSCI requires a compliant firmware implementation.
3346b1fe92SAndrew Turner *
3446b1fe92SAndrew Turner * The PSCI specification used for this implementation is available at:
3546b1fe92SAndrew Turner *
3646b1fe92SAndrew Turner * <http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0022b/index.html>.
3746b1fe92SAndrew Turner *
3846b1fe92SAndrew Turner * TODO:
3946b1fe92SAndrew Turner * - Add support for remaining PSCI calls [this implementation only
4046b1fe92SAndrew Turner * supports get_version, system_reset and cpu_on].
4146b1fe92SAndrew Turner */
4246b1fe92SAndrew Turner
4346b1fe92SAndrew Turner #include <sys/cdefs.h>
442b5014f6SAndrew Turner #include "opt_acpi.h"
452b5014f6SAndrew Turner #include "opt_platform.h"
462b5014f6SAndrew Turner
4746b1fe92SAndrew Turner #include <sys/param.h>
4846b1fe92SAndrew Turner #include <sys/systm.h>
4946b1fe92SAndrew Turner #include <sys/bus.h>
5046b1fe92SAndrew Turner #include <sys/eventhandler.h>
5146b1fe92SAndrew Turner #include <sys/kernel.h>
5246b1fe92SAndrew Turner #include <sys/module.h>
5346b1fe92SAndrew Turner #include <sys/reboot.h>
5446b1fe92SAndrew Turner
5546b1fe92SAndrew Turner #include <machine/bus.h>
562b5014f6SAndrew Turner #include <machine/machdep.h>
5746b1fe92SAndrew Turner
582b5014f6SAndrew Turner #ifdef DEV_ACPI
592b5014f6SAndrew Turner #include <contrib/dev/acpica/include/acpi.h>
602b5014f6SAndrew Turner #include <dev/acpica/acpivar.h>
612b5014f6SAndrew Turner #endif
622b5014f6SAndrew Turner
632b5014f6SAndrew Turner #ifdef FDT
6446b1fe92SAndrew Turner #include <dev/fdt/fdt_common.h>
6546b1fe92SAndrew Turner #include <dev/ofw/openfirm.h>
6646b1fe92SAndrew Turner #include <dev/ofw/ofw_bus.h>
6746b1fe92SAndrew Turner #include <dev/ofw/ofw_bus_subr.h>
682b5014f6SAndrew Turner #endif
6946b1fe92SAndrew Turner
7046b1fe92SAndrew Turner #include <dev/psci/psci.h>
7146b1fe92SAndrew Turner
7246b1fe92SAndrew Turner struct psci_softc {
7346b1fe92SAndrew Turner device_t dev;
7446b1fe92SAndrew Turner
754493861bSAndrew Turner uint32_t psci_version;
7646b1fe92SAndrew Turner uint32_t psci_fnids[PSCI_FN_MAX];
7746b1fe92SAndrew Turner };
7846b1fe92SAndrew Turner
792b5014f6SAndrew Turner #ifdef FDT
8091e44013SMichal Meloun static int psci_v0_1_init(device_t dev, int default_version);
812b5014f6SAndrew Turner #endif
8291e44013SMichal Meloun static int psci_v0_2_init(device_t dev, int default_version);
8346b1fe92SAndrew Turner
8446b1fe92SAndrew Turner struct psci_softc *psci_softc = NULL;
852218070bSKyle Evans bool psci_present;
8646b1fe92SAndrew Turner
872b5014f6SAndrew Turner #ifdef __arm__
882b5014f6SAndrew Turner #define USE_ACPI 0
892b5014f6SAndrew Turner #define USE_FDT 1
902b5014f6SAndrew Turner #elif defined(__aarch64__)
912b5014f6SAndrew Turner #define USE_ACPI (arm64_bus_method == ARM64_BUS_ACPI)
922b5014f6SAndrew Turner #define USE_FDT (arm64_bus_method == ARM64_BUS_FDT)
932b5014f6SAndrew Turner #else
942b5014f6SAndrew Turner #error Unknown architecture
952b5014f6SAndrew Turner #endif
962b5014f6SAndrew Turner
972b5014f6SAndrew Turner #ifdef FDT
9891e44013SMichal Meloun struct psci_init_def {
9991e44013SMichal Meloun int default_version;
10091e44013SMichal Meloun psci_initfn_t psci_init;
10191e44013SMichal Meloun };
10291e44013SMichal Meloun
10391e44013SMichal Meloun static struct psci_init_def psci_v1_0_init_def = {
10491e44013SMichal Meloun .default_version = (1 << 16) | 0,
10591e44013SMichal Meloun .psci_init = psci_v0_2_init
10691e44013SMichal Meloun };
10791e44013SMichal Meloun
10891e44013SMichal Meloun static struct psci_init_def psci_v0_2_init_def = {
10991e44013SMichal Meloun .default_version = (0 << 16) | 2,
11091e44013SMichal Meloun .psci_init = psci_v0_2_init
11191e44013SMichal Meloun };
11291e44013SMichal Meloun
11391e44013SMichal Meloun static struct psci_init_def psci_v0_1_init_def = {
11491e44013SMichal Meloun .default_version = (0 << 16) | 1,
11591e44013SMichal Meloun .psci_init = psci_v0_1_init
11691e44013SMichal Meloun };
11791e44013SMichal Meloun
11846b1fe92SAndrew Turner static struct ofw_compat_data compat_data[] = {
11991e44013SMichal Meloun {"arm,psci-1.0", (uintptr_t)&psci_v1_0_init_def},
12091e44013SMichal Meloun {"arm,psci-0.2", (uintptr_t)&psci_v0_2_init_def},
12191e44013SMichal Meloun {"arm,psci", (uintptr_t)&psci_v0_1_init_def},
12246b1fe92SAndrew Turner {NULL, 0}
12346b1fe92SAndrew Turner };
1242b5014f6SAndrew Turner #endif
12546b1fe92SAndrew Turner
12691e44013SMichal Meloun static int psci_attach(device_t, psci_initfn_t, int);
12746b1fe92SAndrew Turner
1280c38b2d3SAndrew Turner static int psci_find_callfn(psci_callfn_t *);
1297722d8c7SRuslan Bukin static int psci_def_callfn(register_t, register_t, register_t, register_t,
1307722d8c7SRuslan Bukin register_t, register_t, register_t, register_t,
1317722d8c7SRuslan Bukin struct arm_smccc_res *res);
1320c38b2d3SAndrew Turner
1339e8cb3d2SAndrew Turner psci_callfn_t psci_callfn = psci_def_callfn;
1340c38b2d3SAndrew Turner
1350c38b2d3SAndrew Turner static void
psci_init(void * dummy)1360c38b2d3SAndrew Turner psci_init(void *dummy)
1370c38b2d3SAndrew Turner {
1380c38b2d3SAndrew Turner psci_callfn_t new_callfn;
1390c38b2d3SAndrew Turner
1400c38b2d3SAndrew Turner if (psci_find_callfn(&new_callfn) != PSCI_RETVAL_SUCCESS) {
14185ab1415SEmmanuel Vadot printf("No PSCI/SMCCC call function found\n");
1420c38b2d3SAndrew Turner return;
1430c38b2d3SAndrew Turner }
1440c38b2d3SAndrew Turner
1450c38b2d3SAndrew Turner psci_callfn = new_callfn;
146866beaa0SKyle Evans psci_present = true;
1470c38b2d3SAndrew Turner }
1480c38b2d3SAndrew Turner /* This needs to be before cpu_mp at SI_SUB_CPU, SI_ORDER_THIRD */
1490c38b2d3SAndrew Turner SYSINIT(psci_start, SI_SUB_CPU, SI_ORDER_FIRST, psci_init, NULL);
1500c38b2d3SAndrew Turner
1510c38b2d3SAndrew Turner static int
psci_def_callfn(register_t a __unused,register_t b __unused,register_t c __unused,register_t d __unused,register_t e __unused,register_t f __unused,register_t g __unused,register_t h __unused,struct arm_smccc_res * res __unused)1520c38b2d3SAndrew Turner psci_def_callfn(register_t a __unused, register_t b __unused,
1537722d8c7SRuslan Bukin register_t c __unused, register_t d __unused,
1547722d8c7SRuslan Bukin register_t e __unused, register_t f __unused,
1557722d8c7SRuslan Bukin register_t g __unused, register_t h __unused,
1567722d8c7SRuslan Bukin struct arm_smccc_res *res __unused)
1570c38b2d3SAndrew Turner {
1580c38b2d3SAndrew Turner
1590c38b2d3SAndrew Turner panic("No PSCI/SMCCC call function set");
1600c38b2d3SAndrew Turner }
1610c38b2d3SAndrew Turner
1622b5014f6SAndrew Turner #ifdef FDT
1632b5014f6SAndrew Turner static int psci_fdt_probe(device_t dev);
1642b5014f6SAndrew Turner static int psci_fdt_attach(device_t dev);
1652b5014f6SAndrew Turner
1662b5014f6SAndrew Turner static device_method_t psci_fdt_methods[] = {
1672b5014f6SAndrew Turner DEVMETHOD(device_probe, psci_fdt_probe),
1682b5014f6SAndrew Turner DEVMETHOD(device_attach, psci_fdt_attach),
16946b1fe92SAndrew Turner
17046b1fe92SAndrew Turner DEVMETHOD_END
17146b1fe92SAndrew Turner };
17246b1fe92SAndrew Turner
1732b5014f6SAndrew Turner static driver_t psci_fdt_driver = {
17446b1fe92SAndrew Turner "psci",
1752b5014f6SAndrew Turner psci_fdt_methods,
17646b1fe92SAndrew Turner sizeof(struct psci_softc),
17746b1fe92SAndrew Turner };
17846b1fe92SAndrew Turner
179395bee12SJohn Baldwin EARLY_DRIVER_MODULE(psci, simplebus, psci_fdt_driver, 0, 0,
18046b1fe92SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST);
181395bee12SJohn Baldwin EARLY_DRIVER_MODULE(psci, ofwbus, psci_fdt_driver, 0, 0,
18246b1fe92SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST);
18346b1fe92SAndrew Turner
1847ad1ac7dSAndrew Turner static psci_callfn_t
psci_fdt_get_callfn(phandle_t node)1852b5014f6SAndrew Turner psci_fdt_get_callfn(phandle_t node)
1867ad1ac7dSAndrew Turner {
1877ad1ac7dSAndrew Turner char method[16];
1887ad1ac7dSAndrew Turner
1897ad1ac7dSAndrew Turner if ((OF_getprop(node, "method", method, sizeof(method))) > 0) {
1907ad1ac7dSAndrew Turner if (strcmp(method, "hvc") == 0)
1917722d8c7SRuslan Bukin return (arm_smccc_hvc);
1927ad1ac7dSAndrew Turner else if (strcmp(method, "smc") == 0)
1937722d8c7SRuslan Bukin return (arm_smccc_smc);
1947ad1ac7dSAndrew Turner else
1957ad1ac7dSAndrew Turner printf("psci: PSCI conduit \"%s\" invalid\n", method);
1967ad1ac7dSAndrew Turner } else
1977ad1ac7dSAndrew Turner printf("psci: PSCI conduit not supplied in the device tree\n");
1987ad1ac7dSAndrew Turner
1997ad1ac7dSAndrew Turner return (NULL);
2007ad1ac7dSAndrew Turner }
2017ad1ac7dSAndrew Turner
20246b1fe92SAndrew Turner static int
psci_fdt_probe(device_t dev)2032b5014f6SAndrew Turner psci_fdt_probe(device_t dev)
20446b1fe92SAndrew Turner {
20546b1fe92SAndrew Turner const struct ofw_compat_data *ocd;
20646b1fe92SAndrew Turner
20746b1fe92SAndrew Turner if (!ofw_bus_status_okay(dev))
20846b1fe92SAndrew Turner return (ENXIO);
20946b1fe92SAndrew Turner
21046b1fe92SAndrew Turner ocd = ofw_bus_search_compatible(dev, compat_data);
21146b1fe92SAndrew Turner if (ocd->ocd_str == NULL)
21246b1fe92SAndrew Turner return (ENXIO);
21346b1fe92SAndrew Turner
21446b1fe92SAndrew Turner device_set_desc(dev, "ARM Power State Co-ordination Interface Driver");
21546b1fe92SAndrew Turner
21646b1fe92SAndrew Turner return (BUS_PROBE_SPECIFIC);
21746b1fe92SAndrew Turner }
21846b1fe92SAndrew Turner
21946b1fe92SAndrew Turner static int
psci_fdt_attach(device_t dev)2202b5014f6SAndrew Turner psci_fdt_attach(device_t dev)
22146b1fe92SAndrew Turner {
22246b1fe92SAndrew Turner const struct ofw_compat_data *ocd;
22391e44013SMichal Meloun struct psci_init_def *psci_init_def;
22446b1fe92SAndrew Turner
2252b5014f6SAndrew Turner ocd = ofw_bus_search_compatible(dev, compat_data);
22691e44013SMichal Meloun psci_init_def = (struct psci_init_def *)ocd->ocd_data;
2272b5014f6SAndrew Turner
22891e44013SMichal Meloun return (psci_attach(dev, psci_init_def->psci_init,
22991e44013SMichal Meloun psci_init_def->default_version));
2302b5014f6SAndrew Turner }
2312b5014f6SAndrew Turner #endif
2322b5014f6SAndrew Turner
2332b5014f6SAndrew Turner #ifdef DEV_ACPI
2342b5014f6SAndrew Turner static void psci_acpi_identify(driver_t *, device_t);
2352b5014f6SAndrew Turner static int psci_acpi_probe(device_t);
2362b5014f6SAndrew Turner static int psci_acpi_attach(device_t);
2372b5014f6SAndrew Turner
2382b5014f6SAndrew Turner static device_method_t psci_acpi_methods[] = {
2392b5014f6SAndrew Turner /* Device interface */
2402b5014f6SAndrew Turner DEVMETHOD(device_identify, psci_acpi_identify),
2412b5014f6SAndrew Turner DEVMETHOD(device_probe, psci_acpi_probe),
2422b5014f6SAndrew Turner DEVMETHOD(device_attach, psci_acpi_attach),
2432b5014f6SAndrew Turner
2442b5014f6SAndrew Turner DEVMETHOD_END
2452b5014f6SAndrew Turner };
2462b5014f6SAndrew Turner
2472b5014f6SAndrew Turner static driver_t psci_acpi_driver = {
2482b5014f6SAndrew Turner "psci",
2492b5014f6SAndrew Turner psci_acpi_methods,
2502b5014f6SAndrew Turner sizeof(struct psci_softc),
2512b5014f6SAndrew Turner };
2522b5014f6SAndrew Turner
253395bee12SJohn Baldwin EARLY_DRIVER_MODULE(psci, acpi, psci_acpi_driver, 0, 0,
2542b5014f6SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST);
2552b5014f6SAndrew Turner
2562b5014f6SAndrew Turner static int
psci_acpi_bootflags(void)2572b5014f6SAndrew Turner psci_acpi_bootflags(void)
2582b5014f6SAndrew Turner {
2592b5014f6SAndrew Turner ACPI_TABLE_FADT *fadt;
2602b5014f6SAndrew Turner vm_paddr_t physaddr;
2612b5014f6SAndrew Turner int flags;
2622b5014f6SAndrew Turner
2632b5014f6SAndrew Turner physaddr = acpi_find_table(ACPI_SIG_FADT);
2642b5014f6SAndrew Turner if (physaddr == 0)
2652b5014f6SAndrew Turner return (0);
2662b5014f6SAndrew Turner
2672b5014f6SAndrew Turner fadt = acpi_map_table(physaddr, ACPI_SIG_FADT);
2682b5014f6SAndrew Turner if (fadt == NULL) {
2692b5014f6SAndrew Turner printf("psci: Unable to map the FADT\n");
2702b5014f6SAndrew Turner return (0);
2712b5014f6SAndrew Turner }
2722b5014f6SAndrew Turner
2732b5014f6SAndrew Turner flags = fadt->ArmBootFlags;
2742b5014f6SAndrew Turner
2752b5014f6SAndrew Turner acpi_unmap_table(fadt);
2762b5014f6SAndrew Turner return (flags);
2772b5014f6SAndrew Turner }
2782b5014f6SAndrew Turner
2792b5014f6SAndrew Turner static psci_callfn_t
psci_acpi_get_callfn(int flags)2802b5014f6SAndrew Turner psci_acpi_get_callfn(int flags)
2812b5014f6SAndrew Turner {
2822b5014f6SAndrew Turner
2832b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_COMPLIANT) != 0) {
2842b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_USE_HVC) != 0)
2857722d8c7SRuslan Bukin return (arm_smccc_hvc);
2862b5014f6SAndrew Turner else
2877722d8c7SRuslan Bukin return (arm_smccc_smc);
2882b5014f6SAndrew Turner } else {
2892b5014f6SAndrew Turner printf("psci: PSCI conduit not supplied in the device tree\n");
2902b5014f6SAndrew Turner }
2912b5014f6SAndrew Turner
2922b5014f6SAndrew Turner return (NULL);
2932b5014f6SAndrew Turner }
2942b5014f6SAndrew Turner
2952b5014f6SAndrew Turner static void
psci_acpi_identify(driver_t * driver,device_t parent)2962b5014f6SAndrew Turner psci_acpi_identify(driver_t *driver, device_t parent)
2972b5014f6SAndrew Turner {
2982b5014f6SAndrew Turner device_t dev;
2992b5014f6SAndrew Turner int flags;
3002b5014f6SAndrew Turner
3012b5014f6SAndrew Turner flags = psci_acpi_bootflags();
3022b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_COMPLIANT) != 0) {
3032b5014f6SAndrew Turner dev = BUS_ADD_CHILD(parent,
3042b5014f6SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST, "psci", -1);
3052b5014f6SAndrew Turner
3062b5014f6SAndrew Turner if (dev != NULL)
3072b5014f6SAndrew Turner acpi_set_private(dev, (void *)(uintptr_t)flags);
3082b5014f6SAndrew Turner }
3092b5014f6SAndrew Turner }
3102b5014f6SAndrew Turner
3112b5014f6SAndrew Turner static int
psci_acpi_probe(device_t dev)3122b5014f6SAndrew Turner psci_acpi_probe(device_t dev)
3132b5014f6SAndrew Turner {
3142b5014f6SAndrew Turner uintptr_t flags;
3152b5014f6SAndrew Turner
3162b5014f6SAndrew Turner flags = (uintptr_t)acpi_get_private(dev);
3172b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_COMPLIANT) == 0)
3182b5014f6SAndrew Turner return (ENXIO);
3192b5014f6SAndrew Turner
3202b5014f6SAndrew Turner device_set_desc(dev, "ARM Power State Co-ordination Interface Driver");
3212b5014f6SAndrew Turner return (BUS_PROBE_SPECIFIC);
3222b5014f6SAndrew Turner }
3232b5014f6SAndrew Turner
3242b5014f6SAndrew Turner static int
psci_acpi_attach(device_t dev)3252b5014f6SAndrew Turner psci_acpi_attach(device_t dev)
3262b5014f6SAndrew Turner {
3272b5014f6SAndrew Turner
32891e44013SMichal Meloun return (psci_attach(dev, psci_v0_2_init, PSCI_RETVAL_NOT_SUPPORTED));
3292b5014f6SAndrew Turner }
3302b5014f6SAndrew Turner #endif
3312b5014f6SAndrew Turner
3322b5014f6SAndrew Turner static int
psci_attach(device_t dev,psci_initfn_t psci_init,int default_version)33391e44013SMichal Meloun psci_attach(device_t dev, psci_initfn_t psci_init, int default_version)
3342b5014f6SAndrew Turner {
3352b5014f6SAndrew Turner struct psci_softc *sc = device_get_softc(dev);
3362b5014f6SAndrew Turner
33746b1fe92SAndrew Turner if (psci_softc != NULL)
33846b1fe92SAndrew Turner return (ENXIO);
33946b1fe92SAndrew Turner
3402b5014f6SAndrew Turner KASSERT(psci_init != NULL, ("PSCI init function cannot be NULL"));
34191e44013SMichal Meloun if (psci_init(dev, default_version))
34246b1fe92SAndrew Turner return (ENXIO);
34346b1fe92SAndrew Turner
3447ca55fccSAndrew Turner #ifdef __aarch64__
3450600af1fSAndrew Turner smccc_init();
3467ca55fccSAndrew Turner #endif
3470600af1fSAndrew Turner
34846b1fe92SAndrew Turner psci_softc = sc;
34946b1fe92SAndrew Turner
35046b1fe92SAndrew Turner return (0);
35146b1fe92SAndrew Turner }
35246b1fe92SAndrew Turner
35346b1fe92SAndrew Turner static int
_psci_get_version(struct psci_softc * sc)3548ab09f8aSAndrew Turner _psci_get_version(struct psci_softc *sc)
35546b1fe92SAndrew Turner {
35646b1fe92SAndrew Turner uint32_t fnid;
35746b1fe92SAndrew Turner
35846b1fe92SAndrew Turner /* PSCI version wasn't supported in v0.1. */
35946b1fe92SAndrew Turner fnid = sc->psci_fnids[PSCI_FN_VERSION];
36046b1fe92SAndrew Turner if (fnid)
3610c38b2d3SAndrew Turner return (psci_call(fnid, 0, 0, 0));
36246b1fe92SAndrew Turner
36346b1fe92SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED);
36446b1fe92SAndrew Turner }
36546b1fe92SAndrew Turner
3668ab09f8aSAndrew Turner int
psci_get_version(void)3678ab09f8aSAndrew Turner psci_get_version(void)
3688ab09f8aSAndrew Turner {
3698ab09f8aSAndrew Turner
3708ab09f8aSAndrew Turner if (psci_softc == NULL)
3718ab09f8aSAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED);
3728ab09f8aSAndrew Turner return (_psci_get_version(psci_softc));
3738ab09f8aSAndrew Turner }
3748ab09f8aSAndrew Turner
3752b5014f6SAndrew Turner #ifdef FDT
3762b5014f6SAndrew Turner static int
psci_fdt_callfn(psci_callfn_t * callfn)3772b5014f6SAndrew Turner psci_fdt_callfn(psci_callfn_t *callfn)
37846b1fe92SAndrew Turner {
3797ad1ac7dSAndrew Turner phandle_t node;
3807ad1ac7dSAndrew Turner
381*f91e9401SAndrew Turner /* XXX: This is suboptimal, we should walk the tree & check each
382*f91e9401SAndrew Turner * node against compat_data, but we only have a few entries so
383*f91e9401SAndrew Turner * it's ok for now.
384*f91e9401SAndrew Turner */
385*f91e9401SAndrew Turner for (int i = 0; compat_data[i].ocd_str != NULL; i++) {
386*f91e9401SAndrew Turner node = ofw_bus_find_compatible(OF_peer(0),
387*f91e9401SAndrew Turner compat_data[i].ocd_str);
388*f91e9401SAndrew Turner if (node != 0)
389*f91e9401SAndrew Turner break;
390*f91e9401SAndrew Turner }
3917ad1ac7dSAndrew Turner if (node == 0)
392c2dd354bSAndrew Turner return (PSCI_MISSING);
3937ad1ac7dSAndrew Turner
39453670ee1SStephen J. Kiernan if (!ofw_bus_node_status_okay(node))
39553670ee1SStephen J. Kiernan return (PSCI_MISSING);
39653670ee1SStephen J. Kiernan
3972b5014f6SAndrew Turner *callfn = psci_fdt_get_callfn(node);
3982b5014f6SAndrew Turner return (0);
3992b5014f6SAndrew Turner }
4002b5014f6SAndrew Turner #endif
4012b5014f6SAndrew Turner
4022b5014f6SAndrew Turner #ifdef DEV_ACPI
4032b5014f6SAndrew Turner static int
psci_acpi_callfn(psci_callfn_t * callfn)4042b5014f6SAndrew Turner psci_acpi_callfn(psci_callfn_t *callfn)
4052b5014f6SAndrew Turner {
4062b5014f6SAndrew Turner int flags;
4072b5014f6SAndrew Turner
4082b5014f6SAndrew Turner flags = psci_acpi_bootflags();
4092b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_COMPLIANT) == 0)
4102b5014f6SAndrew Turner return (PSCI_MISSING);
4112b5014f6SAndrew Turner
4122b5014f6SAndrew Turner *callfn = psci_acpi_get_callfn(flags);
4132b5014f6SAndrew Turner return (0);
4142b5014f6SAndrew Turner }
4152b5014f6SAndrew Turner #endif
4162b5014f6SAndrew Turner
4170c38b2d3SAndrew Turner static int
psci_find_callfn(psci_callfn_t * callfn)4180c38b2d3SAndrew Turner psci_find_callfn(psci_callfn_t *callfn)
4192b5014f6SAndrew Turner {
4202b5014f6SAndrew Turner int error;
4212b5014f6SAndrew Turner
4220c38b2d3SAndrew Turner *callfn = NULL;
4232b5014f6SAndrew Turner #ifdef FDT
4242b5014f6SAndrew Turner if (USE_FDT) {
4250c38b2d3SAndrew Turner error = psci_fdt_callfn(callfn);
4262b5014f6SAndrew Turner if (error != 0)
4272b5014f6SAndrew Turner return (error);
4282b5014f6SAndrew Turner }
4292b5014f6SAndrew Turner #endif
4302b5014f6SAndrew Turner #ifdef DEV_ACPI
4310c38b2d3SAndrew Turner if (*callfn == NULL && USE_ACPI) {
4320c38b2d3SAndrew Turner error = psci_acpi_callfn(callfn);
4332b5014f6SAndrew Turner if (error != 0)
4342b5014f6SAndrew Turner return (error);
4352b5014f6SAndrew Turner }
4362b5014f6SAndrew Turner #endif
4372b5014f6SAndrew Turner
4380c38b2d3SAndrew Turner if (*callfn == NULL)
439c2dd354bSAndrew Turner return (PSCI_MISSING);
4400c38b2d3SAndrew Turner
4410c38b2d3SAndrew Turner return (PSCI_RETVAL_SUCCESS);
4427ad1ac7dSAndrew Turner }
44346b1fe92SAndrew Turner
4445add8393SAndrew Turner int32_t
psci_features(uint32_t psci_func_id)4455add8393SAndrew Turner psci_features(uint32_t psci_func_id)
4465add8393SAndrew Turner {
4475add8393SAndrew Turner
4485add8393SAndrew Turner if (psci_softc == NULL)
4495add8393SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED);
4505add8393SAndrew Turner
4515add8393SAndrew Turner /* The feature flags were added to PSCI 1.0 */
4525add8393SAndrew Turner if (PSCI_VER_MAJOR(psci_softc->psci_version) < 1)
4535add8393SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED);
4545add8393SAndrew Turner
4555add8393SAndrew Turner return (psci_call(PSCI_FNID_FEATURES, psci_func_id, 0, 0));
4565add8393SAndrew Turner }
4575add8393SAndrew Turner
4580c38b2d3SAndrew Turner int
psci_cpu_on(unsigned long cpu,unsigned long entry,unsigned long context_id)4590c38b2d3SAndrew Turner psci_cpu_on(unsigned long cpu, unsigned long entry, unsigned long context_id)
4600c38b2d3SAndrew Turner {
4610c38b2d3SAndrew Turner uint32_t fnid;
4620c38b2d3SAndrew Turner
4630c38b2d3SAndrew Turner fnid = PSCI_FNID_CPU_ON;
4640c38b2d3SAndrew Turner if (psci_softc != NULL)
4650c38b2d3SAndrew Turner fnid = psci_softc->psci_fnids[PSCI_FN_CPU_ON];
4660c38b2d3SAndrew Turner
46746b1fe92SAndrew Turner /* PSCI v0.1 and v0.2 both support cpu_on. */
4680c38b2d3SAndrew Turner return (psci_call(fnid, cpu, entry, context_id));
46946b1fe92SAndrew Turner }
47046b1fe92SAndrew Turner
47146b1fe92SAndrew Turner static void
psci_shutdown(void * xsc,int howto)47246b1fe92SAndrew Turner psci_shutdown(void *xsc, int howto)
47346b1fe92SAndrew Turner {
47446b1fe92SAndrew Turner uint32_t fn = 0;
47546b1fe92SAndrew Turner
4762b5014f6SAndrew Turner if (psci_softc == NULL)
4772b5014f6SAndrew Turner return;
4782b5014f6SAndrew Turner
47946b1fe92SAndrew Turner if ((howto & RB_POWEROFF) != 0)
48046b1fe92SAndrew Turner fn = psci_softc->psci_fnids[PSCI_FN_SYSTEM_OFF];
4810f354b2bSAndriy Gapon if (fn)
4820f354b2bSAndriy Gapon psci_call(fn, 0, 0, 0);
48346b1fe92SAndrew Turner
4840f354b2bSAndriy Gapon /* System reset and off do not return. */
4850f354b2bSAndriy Gapon }
4860f354b2bSAndriy Gapon
4870f354b2bSAndriy Gapon static void
psci_reboot(void * xsc,int howto)4880f354b2bSAndriy Gapon psci_reboot(void *xsc, int howto)
4890f354b2bSAndriy Gapon {
4900f354b2bSAndriy Gapon uint32_t fn = 0;
4910f354b2bSAndriy Gapon
4920f354b2bSAndriy Gapon if (psci_softc == NULL)
4930f354b2bSAndriy Gapon return;
4940f354b2bSAndriy Gapon
4950f354b2bSAndriy Gapon if ((howto & RB_HALT) == 0)
4960f354b2bSAndriy Gapon fn = psci_softc->psci_fnids[PSCI_FN_SYSTEM_RESET];
49746b1fe92SAndrew Turner if (fn)
4980c38b2d3SAndrew Turner psci_call(fn, 0, 0, 0);
49946b1fe92SAndrew Turner
50046b1fe92SAndrew Turner /* System reset and off do not return. */
50146b1fe92SAndrew Turner }
50246b1fe92SAndrew Turner
503574a7c6cSAndrew Turner void
psci_reset(void)504574a7c6cSAndrew Turner psci_reset(void)
505574a7c6cSAndrew Turner {
506574a7c6cSAndrew Turner
5070f354b2bSAndriy Gapon psci_reboot(NULL, 0);
508574a7c6cSAndrew Turner }
509574a7c6cSAndrew Turner
5102b5014f6SAndrew Turner #ifdef FDT
5112b5014f6SAndrew Turner /* Only support PSCI 0.1 on FDT */
51246b1fe92SAndrew Turner static int
psci_v0_1_init(device_t dev,int default_version __unused)51391e44013SMichal Meloun psci_v0_1_init(device_t dev, int default_version __unused)
51446b1fe92SAndrew Turner {
51546b1fe92SAndrew Turner struct psci_softc *sc = device_get_softc(dev);
51646b1fe92SAndrew Turner int psci_fn;
51746b1fe92SAndrew Turner uint32_t psci_fnid;
51846b1fe92SAndrew Turner phandle_t node;
51946b1fe92SAndrew Turner int len;
52046b1fe92SAndrew Turner
52146b1fe92SAndrew Turner /* Zero out the function ID table - Is this needed ? */
52246b1fe92SAndrew Turner for (psci_fn = PSCI_FN_VERSION, psci_fnid = PSCI_FNID_VERSION;
52346b1fe92SAndrew Turner psci_fn < PSCI_FN_MAX; psci_fn++, psci_fnid++)
52446b1fe92SAndrew Turner sc->psci_fnids[psci_fn] = 0;
52546b1fe92SAndrew Turner
52646b1fe92SAndrew Turner /* PSCI v0.1 doesn't specify function IDs. Get them from DT */
52746b1fe92SAndrew Turner node = ofw_bus_get_node(dev);
52846b1fe92SAndrew Turner
52946b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_suspend")) > 0) {
53046b1fe92SAndrew Turner OF_getencprop(node, "cpu_suspend", &psci_fnid, len);
53146b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_SUSPEND] = psci_fnid;
53246b1fe92SAndrew Turner }
53346b1fe92SAndrew Turner
53446b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_on")) > 0) {
53546b1fe92SAndrew Turner OF_getencprop(node, "cpu_on", &psci_fnid, len);
53646b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_ON] = psci_fnid;
53746b1fe92SAndrew Turner }
53846b1fe92SAndrew Turner
53946b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_off")) > 0) {
54046b1fe92SAndrew Turner OF_getencprop(node, "cpu_off", &psci_fnid, len);
54146b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_OFF] = psci_fnid;
54246b1fe92SAndrew Turner }
54346b1fe92SAndrew Turner
54446b1fe92SAndrew Turner if ((len = OF_getproplen(node, "migrate")) > 0) {
54546b1fe92SAndrew Turner OF_getencprop(node, "migrate", &psci_fnid, len);
54646b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE] = psci_fnid;
54746b1fe92SAndrew Turner }
54846b1fe92SAndrew Turner
5494493861bSAndrew Turner sc->psci_version = (0 << 16) | 1;
55046b1fe92SAndrew Turner if (bootverbose)
55146b1fe92SAndrew Turner device_printf(dev, "PSCI version 0.1 available\n");
55246b1fe92SAndrew Turner
55346b1fe92SAndrew Turner return(0);
55446b1fe92SAndrew Turner }
5552b5014f6SAndrew Turner #endif
55646b1fe92SAndrew Turner
55746b1fe92SAndrew Turner static int
psci_v0_2_init(device_t dev,int default_version)55891e44013SMichal Meloun psci_v0_2_init(device_t dev, int default_version)
55946b1fe92SAndrew Turner {
56046b1fe92SAndrew Turner struct psci_softc *sc = device_get_softc(dev);
56146b1fe92SAndrew Turner int version;
56246b1fe92SAndrew Turner
56346b1fe92SAndrew Turner /* PSCI v0.2 specifies explicit function IDs. */
56446b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_VERSION] = PSCI_FNID_VERSION;
56546b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_SUSPEND] = PSCI_FNID_CPU_SUSPEND;
56646b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_OFF] = PSCI_FNID_CPU_OFF;
56746b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_ON] = PSCI_FNID_CPU_ON;
56846b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_AFFINITY_INFO] = PSCI_FNID_AFFINITY_INFO;
56946b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE] = PSCI_FNID_MIGRATE;
57046b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE_INFO_TYPE] = PSCI_FNID_MIGRATE_INFO_TYPE;
57146b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE_INFO_UP_CPU] = PSCI_FNID_MIGRATE_INFO_UP_CPU;
57246b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_SYSTEM_OFF] = PSCI_FNID_SYSTEM_OFF;
57346b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_SYSTEM_RESET] = PSCI_FNID_SYSTEM_RESET;
57446b1fe92SAndrew Turner
5758ab09f8aSAndrew Turner version = _psci_get_version(sc);
57646b1fe92SAndrew Turner
57791e44013SMichal Meloun /*
57891e44013SMichal Meloun * U-Boot PSCI implementation doesn't have psci_get_version()
57991e44013SMichal Meloun * method implemented for many boards. In this case, use the version
58091e44013SMichal Meloun * readed from FDT as fallback. No fallback method for ACPI.
58191e44013SMichal Meloun */
58291e44013SMichal Meloun if (version == PSCI_RETVAL_NOT_SUPPORTED) {
58391e44013SMichal Meloun if (default_version == PSCI_RETVAL_NOT_SUPPORTED)
58446b1fe92SAndrew Turner return (1);
58546b1fe92SAndrew Turner
58691e44013SMichal Meloun version = default_version;
58791e44013SMichal Meloun printf("PSCI get_version() function is not implemented, "
58891e44013SMichal Meloun " assuming v%d.%d\n", PSCI_VER_MAJOR(version),
58991e44013SMichal Meloun PSCI_VER_MINOR(version));
59091e44013SMichal Meloun }
59191e44013SMichal Meloun
5924493861bSAndrew Turner sc->psci_version = version;
5936e3244f5SAndrew Turner if ((PSCI_VER_MAJOR(version) == 0 && PSCI_VER_MINOR(version) == 2) ||
594833a983eSAndrew Turner PSCI_VER_MAJOR(version) == 1) {
59546b1fe92SAndrew Turner if (bootverbose)
596a5c9ec37SEd Maste device_printf(dev, "PSCI version 0.2 compatible\n");
59746b1fe92SAndrew Turner
59846b1fe92SAndrew Turner /*
59946b1fe92SAndrew Turner * We only register this for v0.2 since v0.1 doesn't support
60046b1fe92SAndrew Turner * system_reset.
60146b1fe92SAndrew Turner */
60246b1fe92SAndrew Turner EVENTHANDLER_REGISTER(shutdown_final, psci_shutdown, sc,
60346b1fe92SAndrew Turner SHUTDOWN_PRI_LAST);
60446b1fe92SAndrew Turner
6050f354b2bSAndriy Gapon /* Handle reboot after shutdown_panic. */
6060f354b2bSAndriy Gapon EVENTHANDLER_REGISTER(shutdown_final, psci_reboot, sc,
6070f354b2bSAndriy Gapon SHUTDOWN_PRI_LAST + 150);
6080f354b2bSAndriy Gapon
60946b1fe92SAndrew Turner return (0);
61046b1fe92SAndrew Turner }
6116e3244f5SAndrew Turner
6126e3244f5SAndrew Turner device_printf(dev, "PSCI version number mismatched with DT\n");
6136e3244f5SAndrew Turner return (1);
6146e3244f5SAndrew Turner }
615