1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
33 #include <sys/bus.h>
48 #include <machine/bus.h>
116 	device_set_desc(dev, "MPC106 (Grackle) Host-PCI bridge");  in grackle_probe()
128 	 * The Grackle PCI config addr/data registers are actually in  in grackle_attach()
130 	 * PCI bus, use the fact that they are also available directly  in grackle_attach()
131 	 * on the processor bus and map them  in grackle_attach()
133 	sc->sc_addr = (vm_offset_t)pmap_mapdev(GRACKLE_ADDR, PAGE_SIZE);  in grackle_attach()
134 	sc->sc_data = (vm_offset_t)pmap_mapdev(GRACKLE_DATA, PAGE_SIZE);  in grackle_attach()
140 grackle_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,  in grackle_read_config()  argument
148 	caoff = sc->sc_data + (reg & 0x03);  in grackle_read_config()
150 	if (grackle_enable_config(sc, bus, slot, func, reg) != 0) {  in grackle_read_config()
152 		 * Config probes to non-existent devices on the  in grackle_read_config()
153 		 * secondary bus generates machine checks. Be sure  in grackle_read_config()
156 		if (bus > 0) {  in grackle_read_config()
157 		  if (badaddr((void *)sc->sc_data, 4)) {  in grackle_read_config()
180 grackle_write_config(device_t dev, u_int bus, u_int slot, u_int func,  in grackle_write_config()  argument
187 	caoff = sc->sc_data + (reg & 0x03);  in grackle_write_config()
189 	if (grackle_enable_config(sc, bus, slot, func, reg)) {  in grackle_write_config()
209 grackle_enable_config(struct grackle_softc *sc, u_int bus, u_int slot,  in grackle_enable_config()  argument
218 	cfgval = (bus << 16) | (slot << 11) | (func << 8) | (reg & 0xFC)  in grackle_enable_config()
221 	out32rb(sc->sc_addr, cfgval);  in grackle_enable_config()
222 	(void) in32rb(sc->sc_addr);  in grackle_enable_config()
234 	out32rb(sc->sc_addr, 0);  in grackle_disable_config()
238 badaddr(void *addr, size_t size)  in badaddr()  argument
248 	oldfaultbuf = td->td_pcb->pcb_onfault;  in badaddr()
249 	td->td_pcb->pcb_onfault = &env;  in badaddr()
251 		td->td_pcb->pcb_onfault = oldfaultbuf;  in badaddr()
260 		(void)*(volatile int8_t *)addr;  in badaddr()
263 		(void)*(volatile int16_t *)addr;  in badaddr()
266 		(void)*(volatile int32_t *)addr;  in badaddr()
275 	td->td_pcb->pcb_onfault = oldfaultbuf;  in badaddr()
282  * Driver to swallow Grackle host bridges from the PCI bus side.