parisc/kernel/processor.c

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
32 #include <asm/parisc-device.h>
44 **  	PARISC CPU driver - claim "device" and initialize CPU data structures.
50 ** The callback *should* do per-instance initialization of
62  * init_percpu_prof - enable/setup per cpu profiling hooks.
74  * processor_probe - Determine if processor driver should claim this device.
104 	txn_addr = dev->hpa.start;	/* for legacy PDC */  in processor_probe()
117 		status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,  in processor_probe()
118 			dev->mod_index, PA_VIEW, pa_pdc_cell);  in processor_probe()
123 		BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);  in processor_probe()
124 		BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location);  in processor_probe()
126 		txn_addr = pa_pdc_cell->mod[0];   /* id_eid for IO sapic */  in processor_probe()
131 		status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);  in processor_probe()
137 			&dev->hpa.start);  in processor_probe()
150 				&dev->hpa.start, cpu_info.cpu_num, NR_CPUS);  in processor_probe()
152 			boot_cpu_data.cpu_count--;  in processor_probe()
164 	/* initialize counters - CPU 0 gets it_value set in time_init() */  in processor_probe()
168 	p->dev = dev;		/* Save IODC data in case we need it */  in processor_probe()
169 	p->hpa = dev->hpa.start;	/* save CPU hpa */  in processor_probe()
170 	p->cpuid = cpuid;	/* save CPU id */  in processor_probe()
171 	p->txn_addr = txn_addr;	/* save CPU IRQ address */  in processor_probe()
172 	p->cpu_num = cpu_info.cpu_num;  in processor_probe()
173 	p->cpu_loc = cpu_info.cpu_loc;  in processor_probe()
187 	** OS control. RENDEZVOUS is the default state - see mem_set above.  in processor_probe()
188 	**	p->state = STATE_RENDEZVOUS;  in processor_probe()
224  * collect_boot_cpu_data - Fill the boot_cpu_data structure.
239 	boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */  in collect_boot_cpu_data()
241 	/* get CPU-Model Information... */  in collect_boot_cpu_data()
276 		pr_info("HP-UX model name: %s\n",  in collect_boot_cpu_data()
310  * init_per_cpu - Handle individual processor initializations.
316  * o Set "default" CPU width for trap handlers
320  *	(frowands idea - that way we know which processes need FP
350 		** and clear the T-bit.  in init_per_cpu()
358 			"Halting Machine - FP required\n"  in init_per_cpu()
362 		mdelay(100);	/* previous chars get pushed to console */  in init_per_cpu()
376  * Display CPU info for all CPUs.
385 	strlcpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name));  in show_cpuinfo()
388 		*(--p) = 0;  in show_cpuinfo()
394 		if (0 == cpuinfo->hpa)  in show_cpuinfo()
398 				"cpu family\t: PA-RISC %s\n",  in show_cpuinfo()
436 		seq_printf(m, "model\t\t: %s - %s\n",  in show_cpuinfo()
470  * processor_init - Processor initialization procedure.