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> 4446b1fe92SAndrew Turner __FBSDID("$FreeBSD$"); 4546b1fe92SAndrew Turner 462b5014f6SAndrew Turner #include "opt_acpi.h" 472b5014f6SAndrew Turner #include "opt_platform.h" 482b5014f6SAndrew Turner 4946b1fe92SAndrew Turner #include <sys/param.h> 5046b1fe92SAndrew Turner #include <sys/systm.h> 5146b1fe92SAndrew Turner #include <sys/bus.h> 5246b1fe92SAndrew Turner #include <sys/eventhandler.h> 5346b1fe92SAndrew Turner #include <sys/kernel.h> 5446b1fe92SAndrew Turner #include <sys/module.h> 5546b1fe92SAndrew Turner #include <sys/reboot.h> 5646b1fe92SAndrew Turner 5746b1fe92SAndrew Turner #include <machine/bus.h> 582b5014f6SAndrew Turner #include <machine/machdep.h> 5946b1fe92SAndrew Turner 602b5014f6SAndrew Turner #ifdef DEV_ACPI 612b5014f6SAndrew Turner #include <contrib/dev/acpica/include/acpi.h> 622b5014f6SAndrew Turner #include <dev/acpica/acpivar.h> 632b5014f6SAndrew Turner #endif 642b5014f6SAndrew Turner 652b5014f6SAndrew Turner #ifdef FDT 6646b1fe92SAndrew Turner #include <dev/fdt/fdt_common.h> 6746b1fe92SAndrew Turner #include <dev/ofw/openfirm.h> 6846b1fe92SAndrew Turner #include <dev/ofw/ofw_bus.h> 6946b1fe92SAndrew Turner #include <dev/ofw/ofw_bus_subr.h> 702b5014f6SAndrew Turner #endif 7146b1fe92SAndrew Turner 7246b1fe92SAndrew Turner #include <dev/psci/psci.h> 7346b1fe92SAndrew Turner 7446b1fe92SAndrew Turner struct psci_softc { 7546b1fe92SAndrew Turner device_t dev; 7646b1fe92SAndrew Turner 774493861bSAndrew Turner uint32_t psci_version; 7846b1fe92SAndrew Turner uint32_t psci_fnids[PSCI_FN_MAX]; 7946b1fe92SAndrew Turner }; 8046b1fe92SAndrew Turner 812b5014f6SAndrew Turner #ifdef FDT 8291e44013SMichal Meloun static int psci_v0_1_init(device_t dev, int default_version); 832b5014f6SAndrew Turner #endif 8491e44013SMichal Meloun static int psci_v0_2_init(device_t dev, int default_version); 8546b1fe92SAndrew Turner 8646b1fe92SAndrew Turner struct psci_softc *psci_softc = NULL; 8746b1fe92SAndrew Turner 882b5014f6SAndrew Turner #ifdef __arm__ 892b5014f6SAndrew Turner #define USE_ACPI 0 902b5014f6SAndrew Turner #define USE_FDT 1 912b5014f6SAndrew Turner #elif defined(__aarch64__) 922b5014f6SAndrew Turner #define USE_ACPI (arm64_bus_method == ARM64_BUS_ACPI) 932b5014f6SAndrew Turner #define USE_FDT (arm64_bus_method == ARM64_BUS_FDT) 942b5014f6SAndrew Turner #else 952b5014f6SAndrew Turner #error Unknown architecture 962b5014f6SAndrew Turner #endif 972b5014f6SAndrew Turner 982b5014f6SAndrew Turner #ifdef FDT 9991e44013SMichal Meloun struct psci_init_def { 10091e44013SMichal Meloun int default_version; 10191e44013SMichal Meloun psci_initfn_t psci_init; 10291e44013SMichal Meloun }; 10391e44013SMichal Meloun 10491e44013SMichal Meloun static struct psci_init_def psci_v1_0_init_def = { 10591e44013SMichal Meloun .default_version = (1 << 16) | 0, 10691e44013SMichal Meloun .psci_init = psci_v0_2_init 10791e44013SMichal Meloun }; 10891e44013SMichal Meloun 10991e44013SMichal Meloun static struct psci_init_def psci_v0_2_init_def = { 11091e44013SMichal Meloun .default_version = (0 << 16) | 2, 11191e44013SMichal Meloun .psci_init = psci_v0_2_init 11291e44013SMichal Meloun }; 11391e44013SMichal Meloun 11491e44013SMichal Meloun static struct psci_init_def psci_v0_1_init_def = { 11591e44013SMichal Meloun .default_version = (0 << 16) | 1, 11691e44013SMichal Meloun .psci_init = psci_v0_1_init 11791e44013SMichal Meloun }; 11891e44013SMichal Meloun 11946b1fe92SAndrew Turner static struct ofw_compat_data compat_data[] = { 12091e44013SMichal Meloun {"arm,psci-1.0", (uintptr_t)&psci_v1_0_init_def}, 12191e44013SMichal Meloun {"arm,psci-0.2", (uintptr_t)&psci_v0_2_init_def}, 12291e44013SMichal Meloun {"arm,psci", (uintptr_t)&psci_v0_1_init_def}, 12346b1fe92SAndrew Turner {NULL, 0} 12446b1fe92SAndrew Turner }; 1252b5014f6SAndrew Turner #endif 12646b1fe92SAndrew Turner 12791e44013SMichal Meloun static int psci_attach(device_t, psci_initfn_t, int); 12846b1fe92SAndrew Turner static void psci_shutdown(void *, int); 12946b1fe92SAndrew Turner 1300c38b2d3SAndrew Turner static int psci_find_callfn(psci_callfn_t *); 1310c38b2d3SAndrew Turner static int psci_def_callfn(register_t, register_t, register_t, register_t); 1320c38b2d3SAndrew Turner 1339e8cb3d2SAndrew Turner psci_callfn_t psci_callfn = psci_def_callfn; 1340c38b2d3SAndrew Turner 1350c38b2d3SAndrew Turner static void 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; 1460c38b2d3SAndrew Turner } 1470c38b2d3SAndrew Turner /* This needs to be before cpu_mp at SI_SUB_CPU, SI_ORDER_THIRD */ 1480c38b2d3SAndrew Turner SYSINIT(psci_start, SI_SUB_CPU, SI_ORDER_FIRST, psci_init, NULL); 1490c38b2d3SAndrew Turner 1500c38b2d3SAndrew Turner static int 1510c38b2d3SAndrew Turner psci_def_callfn(register_t a __unused, register_t b __unused, 1520c38b2d3SAndrew Turner register_t c __unused, register_t d __unused) 1530c38b2d3SAndrew Turner { 1540c38b2d3SAndrew Turner 1550c38b2d3SAndrew Turner panic("No PSCI/SMCCC call function set"); 1560c38b2d3SAndrew Turner } 1570c38b2d3SAndrew Turner 1582b5014f6SAndrew Turner #ifdef FDT 1592b5014f6SAndrew Turner static int psci_fdt_probe(device_t dev); 1602b5014f6SAndrew Turner static int psci_fdt_attach(device_t dev); 1612b5014f6SAndrew Turner 1622b5014f6SAndrew Turner static device_method_t psci_fdt_methods[] = { 1632b5014f6SAndrew Turner DEVMETHOD(device_probe, psci_fdt_probe), 1642b5014f6SAndrew Turner DEVMETHOD(device_attach, psci_fdt_attach), 16546b1fe92SAndrew Turner 16646b1fe92SAndrew Turner DEVMETHOD_END 16746b1fe92SAndrew Turner }; 16846b1fe92SAndrew Turner 1692b5014f6SAndrew Turner static driver_t psci_fdt_driver = { 17046b1fe92SAndrew Turner "psci", 1712b5014f6SAndrew Turner psci_fdt_methods, 17246b1fe92SAndrew Turner sizeof(struct psci_softc), 17346b1fe92SAndrew Turner }; 17446b1fe92SAndrew Turner 1752b5014f6SAndrew Turner static devclass_t psci_fdt_devclass; 17646b1fe92SAndrew Turner 1772b5014f6SAndrew Turner EARLY_DRIVER_MODULE(psci, simplebus, psci_fdt_driver, psci_fdt_devclass, 0, 0, 17846b1fe92SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST); 1792b5014f6SAndrew Turner EARLY_DRIVER_MODULE(psci, ofwbus, psci_fdt_driver, psci_fdt_devclass, 0, 0, 18046b1fe92SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST); 18146b1fe92SAndrew Turner 1827ad1ac7dSAndrew Turner static psci_callfn_t 1832b5014f6SAndrew Turner psci_fdt_get_callfn(phandle_t node) 1847ad1ac7dSAndrew Turner { 1857ad1ac7dSAndrew Turner char method[16]; 1867ad1ac7dSAndrew Turner 1877ad1ac7dSAndrew Turner if ((OF_getprop(node, "method", method, sizeof(method))) > 0) { 1887ad1ac7dSAndrew Turner if (strcmp(method, "hvc") == 0) 1897ad1ac7dSAndrew Turner return (psci_hvc_despatch); 1907ad1ac7dSAndrew Turner else if (strcmp(method, "smc") == 0) 1917ad1ac7dSAndrew Turner return (psci_smc_despatch); 1927ad1ac7dSAndrew Turner else 1937ad1ac7dSAndrew Turner printf("psci: PSCI conduit \"%s\" invalid\n", method); 1947ad1ac7dSAndrew Turner } else 1957ad1ac7dSAndrew Turner printf("psci: PSCI conduit not supplied in the device tree\n"); 1967ad1ac7dSAndrew Turner 1977ad1ac7dSAndrew Turner return (NULL); 1987ad1ac7dSAndrew Turner } 1997ad1ac7dSAndrew Turner 20046b1fe92SAndrew Turner static int 2012b5014f6SAndrew Turner psci_fdt_probe(device_t dev) 20246b1fe92SAndrew Turner { 20346b1fe92SAndrew Turner const struct ofw_compat_data *ocd; 20446b1fe92SAndrew Turner 20546b1fe92SAndrew Turner if (!ofw_bus_status_okay(dev)) 20646b1fe92SAndrew Turner return (ENXIO); 20746b1fe92SAndrew Turner 20846b1fe92SAndrew Turner ocd = ofw_bus_search_compatible(dev, compat_data); 20946b1fe92SAndrew Turner if (ocd->ocd_str == NULL) 21046b1fe92SAndrew Turner return (ENXIO); 21146b1fe92SAndrew Turner 21246b1fe92SAndrew Turner device_set_desc(dev, "ARM Power State Co-ordination Interface Driver"); 21346b1fe92SAndrew Turner 21446b1fe92SAndrew Turner return (BUS_PROBE_SPECIFIC); 21546b1fe92SAndrew Turner } 21646b1fe92SAndrew Turner 21746b1fe92SAndrew Turner static int 2182b5014f6SAndrew Turner psci_fdt_attach(device_t dev) 21946b1fe92SAndrew Turner { 22046b1fe92SAndrew Turner const struct ofw_compat_data *ocd; 22191e44013SMichal Meloun struct psci_init_def *psci_init_def; 22246b1fe92SAndrew Turner 2232b5014f6SAndrew Turner ocd = ofw_bus_search_compatible(dev, compat_data); 22491e44013SMichal Meloun psci_init_def = (struct psci_init_def *)ocd->ocd_data; 2252b5014f6SAndrew Turner 22691e44013SMichal Meloun return (psci_attach(dev, psci_init_def->psci_init, 22791e44013SMichal Meloun psci_init_def->default_version)); 2282b5014f6SAndrew Turner } 2292b5014f6SAndrew Turner #endif 2302b5014f6SAndrew Turner 2312b5014f6SAndrew Turner #ifdef DEV_ACPI 2322b5014f6SAndrew Turner static void psci_acpi_identify(driver_t *, device_t); 2332b5014f6SAndrew Turner static int psci_acpi_probe(device_t); 2342b5014f6SAndrew Turner static int psci_acpi_attach(device_t); 2352b5014f6SAndrew Turner 2362b5014f6SAndrew Turner static device_method_t psci_acpi_methods[] = { 2372b5014f6SAndrew Turner /* Device interface */ 2382b5014f6SAndrew Turner DEVMETHOD(device_identify, psci_acpi_identify), 2392b5014f6SAndrew Turner DEVMETHOD(device_probe, psci_acpi_probe), 2402b5014f6SAndrew Turner DEVMETHOD(device_attach, psci_acpi_attach), 2412b5014f6SAndrew Turner 2422b5014f6SAndrew Turner DEVMETHOD_END 2432b5014f6SAndrew Turner }; 2442b5014f6SAndrew Turner 2452b5014f6SAndrew Turner static driver_t psci_acpi_driver = { 2462b5014f6SAndrew Turner "psci", 2472b5014f6SAndrew Turner psci_acpi_methods, 2482b5014f6SAndrew Turner sizeof(struct psci_softc), 2492b5014f6SAndrew Turner }; 2502b5014f6SAndrew Turner 2512b5014f6SAndrew Turner static devclass_t psci_acpi_devclass; 2522b5014f6SAndrew Turner 2532b5014f6SAndrew Turner EARLY_DRIVER_MODULE(psci, acpi, psci_acpi_driver, psci_acpi_devclass, 0, 0, 2542b5014f6SAndrew Turner BUS_PASS_CPU + BUS_PASS_ORDER_FIRST); 2552b5014f6SAndrew Turner 2562b5014f6SAndrew Turner static int 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 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) 2852b5014f6SAndrew Turner return (psci_hvc_despatch); 2862b5014f6SAndrew Turner else 2872b5014f6SAndrew Turner return (psci_smc_despatch); 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 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 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 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 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 34446b1fe92SAndrew Turner psci_softc = sc; 34546b1fe92SAndrew Turner 34646b1fe92SAndrew Turner return (0); 34746b1fe92SAndrew Turner } 34846b1fe92SAndrew Turner 34946b1fe92SAndrew Turner static int 3508ab09f8aSAndrew Turner _psci_get_version(struct psci_softc *sc) 35146b1fe92SAndrew Turner { 35246b1fe92SAndrew Turner uint32_t fnid; 35346b1fe92SAndrew Turner 35446b1fe92SAndrew Turner /* PSCI version wasn't supported in v0.1. */ 35546b1fe92SAndrew Turner fnid = sc->psci_fnids[PSCI_FN_VERSION]; 35646b1fe92SAndrew Turner if (fnid) 3570c38b2d3SAndrew Turner return (psci_call(fnid, 0, 0, 0)); 35846b1fe92SAndrew Turner 35946b1fe92SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED); 36046b1fe92SAndrew Turner } 36146b1fe92SAndrew Turner 3628ab09f8aSAndrew Turner int 3638ab09f8aSAndrew Turner psci_get_version(void) 3648ab09f8aSAndrew Turner { 3658ab09f8aSAndrew Turner 3668ab09f8aSAndrew Turner if (psci_softc == NULL) 3678ab09f8aSAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED); 3688ab09f8aSAndrew Turner return (_psci_get_version(psci_softc)); 3698ab09f8aSAndrew Turner } 3708ab09f8aSAndrew Turner 3712b5014f6SAndrew Turner #ifdef FDT 3722b5014f6SAndrew Turner static int 3732b5014f6SAndrew Turner psci_fdt_callfn(psci_callfn_t *callfn) 37446b1fe92SAndrew Turner { 3757ad1ac7dSAndrew Turner phandle_t node; 3767ad1ac7dSAndrew Turner 3777ad1ac7dSAndrew Turner node = ofw_bus_find_compatible(OF_peer(0), "arm,psci-0.2"); 378845ed716SAndrew Turner if (node == 0) { 379845ed716SAndrew Turner node = ofw_bus_find_compatible(OF_peer(0), "arm,psci-1.0"); 3807ad1ac7dSAndrew Turner if (node == 0) 381c2dd354bSAndrew Turner return (PSCI_MISSING); 382845ed716SAndrew Turner } 3837ad1ac7dSAndrew Turner 3842b5014f6SAndrew Turner *callfn = psci_fdt_get_callfn(node); 3852b5014f6SAndrew Turner return (0); 3862b5014f6SAndrew Turner } 3872b5014f6SAndrew Turner #endif 3882b5014f6SAndrew Turner 3892b5014f6SAndrew Turner #ifdef DEV_ACPI 3902b5014f6SAndrew Turner static int 3912b5014f6SAndrew Turner psci_acpi_callfn(psci_callfn_t *callfn) 3922b5014f6SAndrew Turner { 3932b5014f6SAndrew Turner int flags; 3942b5014f6SAndrew Turner 3952b5014f6SAndrew Turner flags = psci_acpi_bootflags(); 3962b5014f6SAndrew Turner if ((flags & ACPI_FADT_PSCI_COMPLIANT) == 0) 3972b5014f6SAndrew Turner return (PSCI_MISSING); 3982b5014f6SAndrew Turner 3992b5014f6SAndrew Turner *callfn = psci_acpi_get_callfn(flags); 4002b5014f6SAndrew Turner return (0); 4012b5014f6SAndrew Turner } 4022b5014f6SAndrew Turner #endif 4032b5014f6SAndrew Turner 4040c38b2d3SAndrew Turner static int 4050c38b2d3SAndrew Turner psci_find_callfn(psci_callfn_t *callfn) 4062b5014f6SAndrew Turner { 4072b5014f6SAndrew Turner int error; 4082b5014f6SAndrew Turner 4090c38b2d3SAndrew Turner *callfn = NULL; 4102b5014f6SAndrew Turner #ifdef FDT 4112b5014f6SAndrew Turner if (USE_FDT) { 4120c38b2d3SAndrew Turner error = psci_fdt_callfn(callfn); 4132b5014f6SAndrew Turner if (error != 0) 4142b5014f6SAndrew Turner return (error); 4152b5014f6SAndrew Turner } 4162b5014f6SAndrew Turner #endif 4172b5014f6SAndrew Turner #ifdef DEV_ACPI 4180c38b2d3SAndrew Turner if (*callfn == NULL && USE_ACPI) { 4190c38b2d3SAndrew Turner error = psci_acpi_callfn(callfn); 4202b5014f6SAndrew Turner if (error != 0) 4212b5014f6SAndrew Turner return (error); 4222b5014f6SAndrew Turner } 4232b5014f6SAndrew Turner #endif 4242b5014f6SAndrew Turner 4250c38b2d3SAndrew Turner if (*callfn == NULL) 426c2dd354bSAndrew Turner return (PSCI_MISSING); 4270c38b2d3SAndrew Turner 4280c38b2d3SAndrew Turner return (PSCI_RETVAL_SUCCESS); 4297ad1ac7dSAndrew Turner } 43046b1fe92SAndrew Turner 4315add8393SAndrew Turner int32_t 4325add8393SAndrew Turner psci_features(uint32_t psci_func_id) 4335add8393SAndrew Turner { 4345add8393SAndrew Turner 4355add8393SAndrew Turner if (psci_softc == NULL) 4365add8393SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED); 4375add8393SAndrew Turner 4385add8393SAndrew Turner /* The feature flags were added to PSCI 1.0 */ 4395add8393SAndrew Turner if (PSCI_VER_MAJOR(psci_softc->psci_version) < 1) 4405add8393SAndrew Turner return (PSCI_RETVAL_NOT_SUPPORTED); 4415add8393SAndrew Turner 4425add8393SAndrew Turner return (psci_call(PSCI_FNID_FEATURES, psci_func_id, 0, 0)); 4435add8393SAndrew Turner } 4445add8393SAndrew Turner 4450c38b2d3SAndrew Turner int 4460c38b2d3SAndrew Turner psci_cpu_on(unsigned long cpu, unsigned long entry, unsigned long context_id) 4470c38b2d3SAndrew Turner { 4480c38b2d3SAndrew Turner uint32_t fnid; 4490c38b2d3SAndrew Turner 4500c38b2d3SAndrew Turner fnid = PSCI_FNID_CPU_ON; 4510c38b2d3SAndrew Turner if (psci_softc != NULL) 4520c38b2d3SAndrew Turner fnid = psci_softc->psci_fnids[PSCI_FN_CPU_ON]; 4530c38b2d3SAndrew Turner 45446b1fe92SAndrew Turner /* PSCI v0.1 and v0.2 both support cpu_on. */ 4550c38b2d3SAndrew Turner return (psci_call(fnid, cpu, entry, context_id)); 45646b1fe92SAndrew Turner } 45746b1fe92SAndrew Turner 45846b1fe92SAndrew Turner static void 45946b1fe92SAndrew Turner psci_shutdown(void *xsc, int howto) 46046b1fe92SAndrew Turner { 46146b1fe92SAndrew Turner uint32_t fn = 0; 46246b1fe92SAndrew Turner 4632b5014f6SAndrew Turner if (psci_softc == NULL) 4642b5014f6SAndrew Turner return; 4652b5014f6SAndrew Turner 46646b1fe92SAndrew Turner /* PSCI system_off and system_reset werent't supported in v0.1. */ 46746b1fe92SAndrew Turner if ((howto & RB_POWEROFF) != 0) 46846b1fe92SAndrew Turner fn = psci_softc->psci_fnids[PSCI_FN_SYSTEM_OFF]; 46946b1fe92SAndrew Turner else if ((howto & RB_HALT) == 0) 47046b1fe92SAndrew Turner fn = psci_softc->psci_fnids[PSCI_FN_SYSTEM_RESET]; 47146b1fe92SAndrew Turner 47246b1fe92SAndrew Turner if (fn) 4730c38b2d3SAndrew Turner psci_call(fn, 0, 0, 0); 47446b1fe92SAndrew Turner 47546b1fe92SAndrew Turner /* System reset and off do not return. */ 47646b1fe92SAndrew Turner } 47746b1fe92SAndrew Turner 478574a7c6cSAndrew Turner void 479574a7c6cSAndrew Turner psci_reset(void) 480574a7c6cSAndrew Turner { 481574a7c6cSAndrew Turner 482574a7c6cSAndrew Turner psci_shutdown(NULL, 0); 483574a7c6cSAndrew Turner } 484574a7c6cSAndrew Turner 4852b5014f6SAndrew Turner #ifdef FDT 4862b5014f6SAndrew Turner /* Only support PSCI 0.1 on FDT */ 48746b1fe92SAndrew Turner static int 48891e44013SMichal Meloun psci_v0_1_init(device_t dev, int default_version __unused) 48946b1fe92SAndrew Turner { 49046b1fe92SAndrew Turner struct psci_softc *sc = device_get_softc(dev); 49146b1fe92SAndrew Turner int psci_fn; 49246b1fe92SAndrew Turner uint32_t psci_fnid; 49346b1fe92SAndrew Turner phandle_t node; 49446b1fe92SAndrew Turner int len; 49546b1fe92SAndrew Turner 49646b1fe92SAndrew Turner 49746b1fe92SAndrew Turner /* Zero out the function ID table - Is this needed ? */ 49846b1fe92SAndrew Turner for (psci_fn = PSCI_FN_VERSION, psci_fnid = PSCI_FNID_VERSION; 49946b1fe92SAndrew Turner psci_fn < PSCI_FN_MAX; psci_fn++, psci_fnid++) 50046b1fe92SAndrew Turner sc->psci_fnids[psci_fn] = 0; 50146b1fe92SAndrew Turner 50246b1fe92SAndrew Turner /* PSCI v0.1 doesn't specify function IDs. Get them from DT */ 50346b1fe92SAndrew Turner node = ofw_bus_get_node(dev); 50446b1fe92SAndrew Turner 50546b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_suspend")) > 0) { 50646b1fe92SAndrew Turner OF_getencprop(node, "cpu_suspend", &psci_fnid, len); 50746b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_SUSPEND] = psci_fnid; 50846b1fe92SAndrew Turner } 50946b1fe92SAndrew Turner 51046b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_on")) > 0) { 51146b1fe92SAndrew Turner OF_getencprop(node, "cpu_on", &psci_fnid, len); 51246b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_ON] = psci_fnid; 51346b1fe92SAndrew Turner } 51446b1fe92SAndrew Turner 51546b1fe92SAndrew Turner if ((len = OF_getproplen(node, "cpu_off")) > 0) { 51646b1fe92SAndrew Turner OF_getencprop(node, "cpu_off", &psci_fnid, len); 51746b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_OFF] = psci_fnid; 51846b1fe92SAndrew Turner } 51946b1fe92SAndrew Turner 52046b1fe92SAndrew Turner if ((len = OF_getproplen(node, "migrate")) > 0) { 52146b1fe92SAndrew Turner OF_getencprop(node, "migrate", &psci_fnid, len); 52246b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE] = psci_fnid; 52346b1fe92SAndrew Turner } 52446b1fe92SAndrew Turner 5254493861bSAndrew Turner sc->psci_version = (0 << 16) | 1; 52646b1fe92SAndrew Turner if (bootverbose) 52746b1fe92SAndrew Turner device_printf(dev, "PSCI version 0.1 available\n"); 52846b1fe92SAndrew Turner 52946b1fe92SAndrew Turner return(0); 53046b1fe92SAndrew Turner } 5312b5014f6SAndrew Turner #endif 53246b1fe92SAndrew Turner 53346b1fe92SAndrew Turner static int 53491e44013SMichal Meloun psci_v0_2_init(device_t dev, int default_version) 53546b1fe92SAndrew Turner { 53646b1fe92SAndrew Turner struct psci_softc *sc = device_get_softc(dev); 53746b1fe92SAndrew Turner int version; 53846b1fe92SAndrew Turner 53946b1fe92SAndrew Turner /* PSCI v0.2 specifies explicit function IDs. */ 54046b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_VERSION] = PSCI_FNID_VERSION; 54146b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_SUSPEND] = PSCI_FNID_CPU_SUSPEND; 54246b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_OFF] = PSCI_FNID_CPU_OFF; 54346b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_CPU_ON] = PSCI_FNID_CPU_ON; 54446b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_AFFINITY_INFO] = PSCI_FNID_AFFINITY_INFO; 54546b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE] = PSCI_FNID_MIGRATE; 54646b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE_INFO_TYPE] = PSCI_FNID_MIGRATE_INFO_TYPE; 54746b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_MIGRATE_INFO_UP_CPU] = PSCI_FNID_MIGRATE_INFO_UP_CPU; 54846b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_SYSTEM_OFF] = PSCI_FNID_SYSTEM_OFF; 54946b1fe92SAndrew Turner sc->psci_fnids[PSCI_FN_SYSTEM_RESET] = PSCI_FNID_SYSTEM_RESET; 55046b1fe92SAndrew Turner 5518ab09f8aSAndrew Turner version = _psci_get_version(sc); 55246b1fe92SAndrew Turner 55391e44013SMichal Meloun /* 55491e44013SMichal Meloun * U-Boot PSCI implementation doesn't have psci_get_version() 55591e44013SMichal Meloun * method implemented for many boards. In this case, use the version 55691e44013SMichal Meloun * readed from FDT as fallback. No fallback method for ACPI. 55791e44013SMichal Meloun */ 55891e44013SMichal Meloun if (version == PSCI_RETVAL_NOT_SUPPORTED) { 55991e44013SMichal Meloun if (default_version == PSCI_RETVAL_NOT_SUPPORTED) 56046b1fe92SAndrew Turner return (1); 56146b1fe92SAndrew Turner 56291e44013SMichal Meloun version = default_version; 56391e44013SMichal Meloun printf("PSCI get_version() function is not implemented, " 56491e44013SMichal Meloun " assuming v%d.%d\n", PSCI_VER_MAJOR(version), 56591e44013SMichal Meloun PSCI_VER_MINOR(version)); 56691e44013SMichal Meloun } 56791e44013SMichal Meloun 5684493861bSAndrew Turner sc->psci_version = version; 5696e3244f5SAndrew Turner if ((PSCI_VER_MAJOR(version) == 0 && PSCI_VER_MINOR(version) == 2) || 570833a983eSAndrew Turner PSCI_VER_MAJOR(version) == 1) { 57146b1fe92SAndrew Turner if (bootverbose) 572a5c9ec37SEd Maste device_printf(dev, "PSCI version 0.2 compatible\n"); 57346b1fe92SAndrew Turner 57446b1fe92SAndrew Turner /* 57546b1fe92SAndrew Turner * We only register this for v0.2 since v0.1 doesn't support 57646b1fe92SAndrew Turner * system_reset. 57746b1fe92SAndrew Turner */ 57846b1fe92SAndrew Turner EVENTHANDLER_REGISTER(shutdown_final, psci_shutdown, sc, 57946b1fe92SAndrew Turner SHUTDOWN_PRI_LAST); 58046b1fe92SAndrew Turner 58146b1fe92SAndrew Turner return (0); 58246b1fe92SAndrew Turner } 5836e3244f5SAndrew Turner 5846e3244f5SAndrew Turner device_printf(dev, "PSCI version number mismatched with DT\n"); 5856e3244f5SAndrew Turner return (1); 5866e3244f5SAndrew Turner } 587