1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *    Initial setup-routines for HP 9000 based hardware.
6  *    Modifications for PA-RISC (C) 1999-2008 Helge Deller <deller@gmx.de>
12  *    Initial PA-RISC Version: 04-23-1999 by Helge Deller
27 #include <asm/pdc.h>
30 #include <asm/parisc-device.h>
42 **  	PARISC CPU driver - claim "device" and initialize CPU data structures.
48 ** The callback *should* do per-instance initialization of
55 ** The code path not shared is how PDC hands control of the CPU to the OS.
60  * init_cpu_profiler - enable/setup per cpu profiling hooks.
72  * processor_probe - Determine if processor driver should claim this device.
98 	/* logical CPU ID and update global counter  in processor_probe()
102 	txn_addr = dev->hpa.start;	/* for legacy PDC */  in processor_probe()
115 		status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,  in processor_probe()
116 			dev->mod_index, PA_VIEW, pa_pdc_cell);  in processor_probe()
121 		BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);  in processor_probe()
122 		BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);  in processor_probe()
124 		txn_addr = pa_pdc_cell->mod[0];   /* id_eid for IO sapic */  in processor_probe()
129 		status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);  in processor_probe()
135 			&dev->hpa.start);  in processor_probe()
141  * We'll care when we need to query PAT PDC about a CPU *after*  in processor_probe()
148 				&dev->hpa.start, cpu_info.cpu_num, NR_CPUS);  in processor_probe()
150 			boot_cpu_data.cpu_count--;  in processor_probe()
162 	/* initialize counters - CPU 0 gets it_value set in time_init() */  in processor_probe()
166 	p->dev = dev;		/* Save IODC data in case we need it */  in processor_probe()
167 	p->hpa = dev->hpa.start;	/* save CPU hpa */  in processor_probe()
168 	p->cpuid = cpuid;	/* save CPU id */  in processor_probe()
169 	p->txn_addr = txn_addr;	/* save CPU IRQ address */  in processor_probe()
170 	p->cpu_num = cpu_info.cpu_num;  in processor_probe()
171 	p->cpu_loc = cpu_info.cpu_loc;  in processor_probe()
185 	** OS control. RENDEZVOUS is the default state - see mem_set above.  in processor_probe()
186 	**	p->state = STATE_RENDEZVOUS;  in processor_probe()
222  * collect_boot_cpu_data - Fill the boot_cpu_data structure.
237 	boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */  in collect_boot_cpu_data()
239 	/* get CPU-Model Information... */  in collect_boot_cpu_data()
240 #define p ((unsigned long *)&boot_cpu_data.pdc.model)  in collect_boot_cpu_data()
241 	if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) {  in collect_boot_cpu_data()
246 		add_device_randomness(&boot_cpu_data.pdc.model,  in collect_boot_cpu_data()
247 			sizeof(boot_cpu_data.pdc.model));  in collect_boot_cpu_data()
251 	if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) {  in collect_boot_cpu_data()
253 			boot_cpu_data.pdc.versions);  in collect_boot_cpu_data()
255 		add_device_randomness(&boot_cpu_data.pdc.versions,  in collect_boot_cpu_data()
256 			sizeof(boot_cpu_data.pdc.versions));  in collect_boot_cpu_data()
259 	if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) {  in collect_boot_cpu_data()
261 			(boot_cpu_data.pdc.cpuid >> 5) & 127,  in collect_boot_cpu_data()
262 			boot_cpu_data.pdc.cpuid & 31,  in collect_boot_cpu_data()
263 			boot_cpu_data.pdc.cpuid);  in collect_boot_cpu_data()
265 		add_device_randomness(&boot_cpu_data.pdc.cpuid,  in collect_boot_cpu_data()
266 			sizeof(boot_cpu_data.pdc.cpuid));  in collect_boot_cpu_data()
269 	if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)  in collect_boot_cpu_data()
271 			boot_cpu_data.pdc.capabilities);  in collect_boot_cpu_data()
273 	if (pdc_model_sysmodel(boot_cpu_data.pdc.sys_model_name) == PDC_OK)  in collect_boot_cpu_data()
275 			boot_cpu_data.pdc.sys_model_name);  in collect_boot_cpu_data()
277 	dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name);  in collect_boot_cpu_data()
279 	boot_cpu_data.hversion =  boot_cpu_data.pdc.model.hversion;  in collect_boot_cpu_data()
280 	boot_cpu_data.sversion =  boot_cpu_data.pdc.model.sversion;  in collect_boot_cpu_data()
303  * init_per_cpu - Handle individual processor initializations.
313  *	(frowands idea - that way we know which processes need FP
345 		** and clear the T-bit.  in init_per_cpu()
353 			"Halting Machine - FP required\n"  in init_per_cpu()
379 		if (0 == cpuinfo->hpa)  in show_cpuinfo()
383 				"cpu family\t: PA-RISC %s\n",  in show_cpuinfo()
402 		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)  in show_cpuinfo()
404 		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)  in show_cpuinfo()
406 		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)  in show_cpuinfo()
408 		switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {  in show_cpuinfo()
419 		seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities);  in show_cpuinfo()
423 				 boot_cpu_data.pdc.sys_model_name,  in show_cpuinfo()
424 				 cpuinfo->dev ?  in show_cpuinfo()
425 				 cpuinfo->dev->name : "Unknown");  in show_cpuinfo()
440 				boot_cpu_data.pdc.model.sw_id);  in show_cpuinfo()
457  * processor_init - Processor initialization procedure.