1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
48 #include <machine/rtas.h>
57 #include "phyp-hvcall.h"
60 #define XICP_PRIORITY	5	/* Random non-zero number */
62 #define MAX_XICP_IRQS	(1<<24)	/* 24-bit XIRR field */
124 	/* XXX: inefficient -- hash table? tree? */
149  * real address by nature that the bus width is smaller than 64-bits.  Placing
156 EARLY_DRIVER_MODULE(xicp, ofwbus, xicp_driver, 0, 0, BUS_PASS_INTERRUPT - 1);
171 		if (cpu >= sc->cpu_range[0] && cpu < sc->cpu_range[1])  in xicp_mem_for_cpu()
172 			return (sc->mem[cpu - sc->cpu_range[0]]);  in xicp_mem_for_cpu()
183 	if (!ofw_bus_is_compatible(dev, "ibm,ppc-xicp") &&  in xicp_probe()
184 	    !ofw_bus_is_compatible(dev, "ibm,opal-intc"))  in xicp_probe()
195 	if (!ofw_bus_is_compatible(dev, "ibm,ppc-xics") &&  in xics_probe()
196 	    !ofw_bus_is_compatible(dev, "IBM,opal-xics"))  in xics_probe()
210 		sc->ibm_int_on = rtas_token_lookup("ibm,int-on");  in xicp_attach()
211 		sc->ibm_int_off = rtas_token_lookup("ibm,int-off");  in xicp_attach()
212 		sc->ibm_set_xive = rtas_token_lookup("ibm,set-xive");  in xicp_attach()
213 		sc->ibm_get_xive = rtas_token_lookup("ibm,get-xive");  in xicp_attach()
219 		device_printf(dev, "Cannot attach without RTAS or OPAL\n");  in xicp_attach()
223 	if (OF_hasprop(phandle, "ibm,interrupt-server-ranges")) {  in xicp_attach()
224 		OF_getencprop(phandle, "ibm,interrupt-server-ranges",  in xicp_attach()
225 		    sc->cpu_range, sizeof(sc->cpu_range));  in xicp_attach()
226 		sc->cpu_range[1] += sc->cpu_range[0];  in xicp_attach()
227 		device_printf(dev, "Handling CPUs %d-%d\n", sc->cpu_range[0],  in xicp_attach()
228 		    sc->cpu_range[1]-1);  in xicp_attach()
230 	} else if (ofw_bus_is_compatible(dev, "ibm,opal-intc")) {  in xicp_attach()
235 			sc->xics_emu = true;  in xicp_attach()
239 		sc->cpu_range[0] = 0;  in xicp_attach()
240 		sc->cpu_range[1] = mp_ncpus;  in xicp_attach()
247 		if (sc->xics_emu) {  in xicp_attach()
251 				    pcpu_find(i)->pc_hwref, 0xff);  in xicp_attach()
254 			for (i = 0; i < sc->cpu_range[1] - sc->cpu_range[0]; i++) {  in xicp_attach()
255 				sc->mem[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,  in xicp_attach()
257 				if (sc->mem[i] == NULL) {  in xicp_attach()
264 				bus_write_1(sc->mem[i], 4, 0xff);  in xicp_attach()
265 				bus_write_1(sc->mem[i], 12, 0xff);  in xicp_attach()
271 	mtx_init(&sc->sc_mtx, "XICP", NULL, MTX_DEF);  in xicp_attach()
272 	sc->nintvecs = 0;  in xicp_attach()
279 	if (sc->xics_emu)  in xicp_attach()
302 		KASSERT(sc->nintvecs + 1 < nitems(sc->intvecs),  in xicp_setup_priv()
304 		mtx_lock(&sc->sc_mtx);  in xicp_setup_priv()
305 		*priv = &sc->intvecs[sc->nintvecs++];  in xicp_setup_priv()
306 		mtx_unlock(&sc->sc_mtx);  in xicp_setup_priv()
322 	int ncpus, i, error = -1;  in xicp_bind()
348 	cpu = pcpu_find(cpu)->pc_hwref;  in xicp_bind()
349 	iv->cpu = cpu;  in xicp_bind()
352 		error = rtas_call_method(sc->ibm_set_xive, 3, 1, irq, cpu,  in xicp_bind()
373 	if ((mfmsr() & PSL_HV) && !sc->xics_emu) {  in xicp_dispatch()
385 		} else if (sc->xics_emu) {  in xicp_dispatch()
406 			else if (sc->xics_emu)  in xicp_dispatch()
413 			i = sc->ipi_vec;  in xicp_dispatch()
416 			for (i = 0; i < sc->nintvecs; i++) {  in xicp_dispatch()
417 				if (sc->intvecs[i].irq == xirr)  in xicp_dispatch()
420 			KASSERT(i < sc->nintvecs, ("Unmapped XIRR"));  in xicp_dispatch()
423 		powerpc_dispatch_intr(sc->intvecs[i].vector, tf);  in xicp_dispatch()
441 	intr->irq = irq;  in xicp_enable()
442 	intr->vector = vector;  in xicp_enable()
443 	intr->cpu = cpu;  in xicp_enable()
448 		sc->ipi_vec = intr - sc->intvecs;  in xicp_enable()
453 		rtas_call_method(sc->ibm_set_xive, 3, 1, irq, cpu,  in xicp_enable()
462 			panic("OPAL_SET_XIVE IRQ %d -> cpu %d failed: %d", irq,  in xicp_enable()
483 		if (sc->xics_emu)  in xicp_eoi()
498 	cpu = pcpu_find(cpu)->pc_hwref;  in xicp_ipi()
502 		if (sc->xics_emu) {  in xicp_ipi()
524 		rtas_call_method(sc->ibm_int_off, 1, 1, irq, &status);  in xicp_mask()
530 		opal_call(OPAL_SET_XIVE, irq, ivec->cpu << 2, 0xff);  in xicp_mask()
545 		rtas_call_method(sc->ibm_int_on, 1, 1, irq, &status);  in xicp_unmask()
551 		opal_call(OPAL_SET_XIVE, irq, ivec->cpu << 2, XICP_PRIORITY);  in xicp_unmask()
557 /* This is only used on POWER9 systems with the XIVE's XICS emulation. */
566 		if (sc->xics_emu)  in xicp_smp_cpu_startup()