// SPDX-License-Identifier: GPL-2.0-or-later/* *    Initial setup-routines for HP 9000 based hardware. * *    Copyright (C) 1991, 1992, 1995  Linus Torvalds *    Modifications for PA-RISC (C) 1999-2008 Helge Deller <deller@gmx.de> *    Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) *    Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> *    Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> *    Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> * *    Initial PA-RISC Version: 04-23-1999 by Helge Deller */#include <linux/delay.h>#include <linux/init.h>#include <linux/mm.h>#include <linux/module.h>#include <linux/seq_file.h>#include <linux/random.h>#include <linux/slab.h>#include <linux/cpu.h>#include <asm/topology.h>#include <asm/param.h>#include <asm/cache.h>#include <asm/hardware.h>	/* for register_parisc_driver() stuff */#include <asm/processor.h>#include <asm/page.h>#include <asm/pdc.h>#include <asm/pdcpat.h>#include <asm/irq.h>		/* for struct irq_region */#include <asm/parisc-device.h> struct system_cpuinfo_parisc boot_cpu_data __ro_after_init;EXPORT_SYMBOL(boot_cpu_data);#ifdef CONFIG_PA8X00int _parisc_requires_coherency __ro_after_init;EXPORT_SYMBOL(_parisc_requires_coherency);#endif DEFINE_PER_CPU(struct cpuinfo_parisc, cpu_data); /***  	PARISC CPU driver - claim "device" and initialize CPU data structures.**** Consolidate per CPU initialization into (mostly) one module.** Monarch CPU will initialize boot_cpu_data which shouldn't** change once the system has booted.**** The callback *should* do per-instance initialization of** everything including the monarch. "Per CPU" init code in** setup.c:start_parisc() has migrated here and start_parisc()** will call register_parisc_driver(&cpu_driver) before calling do_inventory().**** The goal of consolidating CPU initialization into one place is** to make sure all CPUs get initialized the same way.** The code path not shared is how PDC hands control of the CPU to the OS.** The initialization of OS data structures is the same (done below).*/ /** * init_cpu_profiler - enable/setup per cpu profiling hooks. * @cpunum: The processor instance. * * FIXME: doesn't do much yet... */static voidinit_percpu_prof(unsigned long cpunum){}  /** * processor_probe - Determine if processor driver should claim this device. * @dev: The device which has been found. * * Determine if processor driver should claim this chip (return 0) or not  * (return 1).  If so, initialize the chip and tell other partners in crime  * they have work to do. */static int __init processor_probe(struct parisc_device *dev){	unsigned long txn_addr;	unsigned long cpuid;	struct cpuinfo_parisc *p;	struct pdc_pat_cpu_num cpu_info = { }; #ifdef CONFIG_SMP	if (num_online_cpus() >= nr_cpu_ids) {		printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");		return 1;	}#else	if (boot_cpu_data.cpu_count > 0) {		printk(KERN_INFO "CONFIG_SMP=n  ignoring additional CPUs\n");		return 1;	}#endif 	/* logical CPU ID and update global counter	 * May get overwritten by PAT code.	 */	cpuid = boot_cpu_data.cpu_count;	txn_addr = dev->hpa.start;	/* for legacy PDC */	cpu_info.cpu_num = cpu_info.cpu_loc = cpuid; #ifdef CONFIG_64BIT	if (is_pdc_pat()) {		ulong status;		unsigned long bytecnt;	        pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; 		pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);		if (!pa_pdc_cell)			panic("couldn't allocate memory for PDC_PAT_CELL!"); 		status = pdc_pat_cell_module(&bytecnt, dev->pcell_loc,			dev->mod_index, PA_VIEW, pa_pdc_cell); 		BUG_ON(PDC_OK != status); 		/* verify it's the same as what do_pat_inventory() found */		BUG_ON(dev->mod_info != pa_pdc_cell->mod_info);		BUG_ON(dev->pmod_loc != pa_pdc_cell->mod_location); 		txn_addr = pa_pdc_cell->mod[0];   /* id_eid for IO sapic */ 		kfree(pa_pdc_cell); 		/* get the cpu number */		status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start);		BUG_ON(PDC_OK != status); 		pr_info("Logical CPU #%lu is physical cpu #%lu at location "			"0x%lx with hpa %pa\n",			cpuid, cpu_info.cpu_num, cpu_info.cpu_loc,			&dev->hpa.start); #undef USE_PAT_CPUID#ifdef USE_PAT_CPUID/* We need contiguous numbers for cpuid. Firmware's notion * of cpuid is for physical CPUs and we just don't care yet. * We'll care when we need to query PAT PDC about a CPU *after* * boot time (ie shutdown a CPU from an OS perspective). */		if (cpu_info.cpu_num >= NR_CPUS) {			printk(KERN_WARNING "IGNORING CPU at %pa,"				" cpu_slot_id > NR_CPUS"				" (%ld > %d)\n",				&dev->hpa.start, cpu_info.cpu_num, NR_CPUS);			/* Ignore CPU since it will only crash */			boot_cpu_data.cpu_count--;			return 1;		} else {			cpuid = cpu_info.cpu_num;		}#endif	}#endif 	p = &per_cpu(cpu_data, cpuid);	boot_cpu_data.cpu_count++; 	/* initialize counters - CPU 0 gets it_value set in time_init() */	if (cpuid)		memset(p, 0, sizeof(struct cpuinfo_parisc)); 	p->dev = dev;		/* Save IODC data in case we need it */	p->hpa = dev->hpa.start;	/* save CPU hpa */	p->cpuid = cpuid;	/* save CPU id */	p->txn_addr = txn_addr;	/* save CPU IRQ address */	p->cpu_num = cpu_info.cpu_num;	p->cpu_loc = cpu_info.cpu_loc; 	set_cpu_possible(cpuid, true);	store_cpu_topology(cpuid); #ifdef CONFIG_SMP	/*	** FIXME: review if any other initialization is clobbered	**	  for boot_cpu by the above memset().	*/	init_percpu_prof(cpuid);#endif 	/*	** CONFIG_SMP: init_smp_config() will attempt to get CPUs into	** OS control. RENDEZVOUS is the default state - see mem_set above.	**	p->state = STATE_RENDEZVOUS;	*/ #if 0	/* CPU 0 IRQ table is statically allocated/initialized */	if (cpuid) {		struct irqaction actions[]; 		/*		** itimer and ipi IRQ handlers are statically initialized in		** arch/parisc/kernel/irq.c. ie Don't need to register them.		*/		actions = kmalloc(sizeof(struct irqaction)*MAX_CPU_IRQ, GFP_ATOMIC);		if (!actions) {			/* not getting it's own table, share with monarch */			actions = cpu_irq_actions[0];		} 		cpu_irq_actions[cpuid] = actions;	}#endif 	/* 	 * Bring this CPU up now! (ignore bootstrap cpuid == 0)	 */#ifdef CONFIG_SMP	if (cpuid) {		set_cpu_present(cpuid, true);		add_cpu(cpuid);	}#endif 	return 0;} /** * collect_boot_cpu_data - Fill the boot_cpu_data structure. * * This function collects and stores the generic processor information * in the boot_cpu_data structure. */void __init collect_boot_cpu_data(void){	unsigned long cr16_seed;	char orig_prod_num[64], current_prod_num[64], serial_no[64]; 	memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); 	cr16_seed = get_cycles();	add_device_randomness(&cr16_seed, sizeof(cr16_seed)); 	boot_cpu_data.cpu_hz = 100 * PAGE0->mem_10msec; /* Hz of this PARISC */ 	/* get CPU-Model Information... */#define p ((unsigned long *)&boot_cpu_data.pdc.model)	if (pdc_model_info(&boot_cpu_data.pdc.model) == PDC_OK) {		printk(KERN_INFO 			"model %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",			p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8]); 		add_device_randomness(&boot_cpu_data.pdc.model,			sizeof(boot_cpu_data.pdc.model));	}#undef p 	if (pdc_model_versions(&boot_cpu_data.pdc.versions, 0) == PDC_OK) {		printk(KERN_INFO "vers  %08lx\n", 			boot_cpu_data.pdc.versions); 		add_device_randomness(&boot_cpu_data.pdc.versions,			sizeof(boot_cpu_data.pdc.versions));	} 	if (pdc_model_cpuid(&boot_cpu_data.pdc.cpuid) == PDC_OK) {		printk(KERN_INFO "CPUID vers %ld rev %ld (0x%08lx)\n",			(boot_cpu_data.pdc.cpuid >> 5) & 127,			boot_cpu_data.pdc.cpuid & 31,			boot_cpu_data.pdc.cpuid); 		add_device_randomness(&boot_cpu_data.pdc.cpuid,			sizeof(boot_cpu_data.pdc.cpuid));	} 	if (pdc_model_capabilities(&boot_cpu_data.pdc.capabilities) == PDC_OK)		printk(KERN_INFO "capabilities 0x%lx\n",			boot_cpu_data.pdc.capabilities); 	if (pdc_model_sysmodel(OS_ID_HPUX, boot_cpu_data.pdc.sys_model_name) == PDC_OK)		pr_info("HP-UX model name: %s\n",			boot_cpu_data.pdc.sys_model_name); 	serial_no[0] = 0;	if (pdc_model_sysmodel(OS_ID_MPEXL, serial_no) == PDC_OK &&		serial_no[0])		pr_info("MPE/iX model name: %s\n", serial_no); 	dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name); 	boot_cpu_data.hversion =  boot_cpu_data.pdc.model.hversion;	boot_cpu_data.sversion =  boot_cpu_data.pdc.model.sversion; 	boot_cpu_data.cpu_type = parisc_get_cpu_type(boot_cpu_data.hversion);	boot_cpu_data.cpu_name = cpu_name_version[boot_cpu_data.cpu_type][0];	boot_cpu_data.family_name = cpu_name_version[boot_cpu_data.cpu_type][1]; #ifdef CONFIG_PA8X00	_parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||				(boot_cpu_data.cpu_type == mako2);#endif 	if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) {		printk(KERN_INFO "product %s, original product %s, S/N: %s\n",			current_prod_num[0] ? current_prod_num : "n/a",			orig_prod_num, serial_no);		add_device_randomness(orig_prod_num, strlen(orig_prod_num));		add_device_randomness(current_prod_num, strlen(current_prod_num));		add_device_randomness(serial_no, strlen(serial_no));	}}  /** * init_per_cpu - Handle individual processor initializations. * @cpunum: logical processor number. * * This function handles initialization for *every* CPU * in the system: * * o Set "default" CPU width for trap handlers * * o Enable FP coprocessor *   REVISIT: this could be done in the "code 22" trap handler. *	(frowands idea - that way we know which processes need FP *	registers saved on the interrupt stack.) *   NEWS FLASH: wide kernels need FP coprocessor enabled to handle *	formatted printing of %lx for example (double divides I think) * * o Enable CPU profiling hooks. */int init_per_cpu(int cpunum){	int ret;	struct pdc_coproc_cfg coproc_cfg; 	set_firmware_width();	ret = pdc_coproc_cfg(&coproc_cfg); 	if(ret >= 0 && coproc_cfg.ccr_functional) {		mtctl(coproc_cfg.ccr_functional, 10);  /* 10 == Coprocessor Control Reg */ 		/* FWIW, FP rev/model is a more accurate way to determine		** CPU type. CPU rev/model has some ambiguous cases.		*/		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 		if (cpunum == 0)			printk(KERN_INFO  "FP[%d] enabled: Rev %ld Model %ld\n",				cpunum, coproc_cfg.revision, coproc_cfg.model); 		/*		** store status register to stack (hopefully aligned)		** and clear the T-bit.		*/		asm volatile ("fstd    %fr0,8(%sp)"); 	} else {		printk(KERN_WARNING  "WARNING: No FP CoProcessor?!"			" (coproc_cfg.ccr_functional == 0x%lx, expected 0xc0)\n"#ifdef CONFIG_64BIT			"Halting Machine - FP required\n"#endif			, coproc_cfg.ccr_functional);#ifdef CONFIG_64BIT		mdelay(100);	/* previous chars get pushed to console */		panic("FP CoProc not reported");#endif	} 	/* FUTURE: Enable Performance Monitor : ccr bit 0x20 */	init_percpu_prof(cpunum); 	return ret;} /* * Display CPU info for all CPUs. */intshow_cpuinfo (struct seq_file *m, void *v){	unsigned long cpu; 	for_each_online_cpu(cpu) {		const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);#ifdef CONFIG_SMP		if (0 == cpuinfo->hpa)			continue;#endif		seq_printf(m, "processor\t: %lu\n"				"cpu family\t: PA-RISC %s\n",				 cpu, boot_cpu_data.family_name); 		seq_printf(m, "cpu\t\t: %s\n",  boot_cpu_data.cpu_name ); 		/* cpu MHz */		seq_printf(m, "cpu MHz\t\t: %d.%06d\n",				 boot_cpu_data.cpu_hz / 1000000,				 boot_cpu_data.cpu_hz % 1000000  ); #ifdef CONFIG_GENERIC_ARCH_TOPOLOGY		seq_printf(m, "physical id\t: %d\n",				topology_physical_package_id(cpu));		seq_printf(m, "siblings\t: %d\n",				cpumask_weight(topology_core_cpumask(cpu)));		seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu));#endif 		seq_printf(m, "capabilities\t:");		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)			seq_puts(m, " os32");		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)			seq_puts(m, " os64");		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)			seq_puts(m, " iopdir_fdc");		switch (boot_cpu_data.pdc.capabilities & PDC_MODEL_NVA_MASK) {		case PDC_MODEL_NVA_SUPPORTED:			seq_puts(m, " nva_supported");			break;		case PDC_MODEL_NVA_SLOW:			seq_puts(m, " nva_slow");			break;		case PDC_MODEL_NVA_UNSUPPORTED:			seq_puts(m, " needs_equivalent_aliasing");			break;		}		seq_printf(m, " (0x%02lx)\n", boot_cpu_data.pdc.capabilities); 		seq_printf(m, "model\t\t: %s - %s\n",				 boot_cpu_data.pdc.sys_model_name,				 cpuinfo->dev ?				 cpuinfo->dev->name : "Unknown"); 		seq_printf(m, "hversion\t: 0x%08x\n"			        "sversion\t: 0x%08x\n",				 boot_cpu_data.hversion,				 boot_cpu_data.sversion ); 		/* print cachesize info */		show_cache_info(m); 		seq_printf(m, "bogomips\t: %lu.%02lu\n",			     loops_per_jiffy / (500000 / HZ),			     loops_per_jiffy / (5000 / HZ) % 100); 		seq_printf(m, "software id\t: %ld\n\n",				boot_cpu_data.pdc.model.sw_id);	}	return 0;} static const struct parisc_device_id processor_tbl[] __initconst = {	{ HPHW_NPROC, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, SVERSION_ANY_ID },	{ 0, }}; static struct parisc_driver cpu_driver __refdata = {	.name		= "CPU",	.id_table	= processor_tbl,	.probe		= processor_probe}; /** * processor_init - Processor initialization procedure. * * Register this driver. */void __init processor_init(void){	unsigned int cpu; 	reset_cpu_topology(); 	/* reset possible mask. We will mark those which are possible. */	for_each_possible_cpu(cpu)		set_cpu_possible(cpu, false); 	register_parisc_driver(&cpu_driver);}