| // 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/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_PA8X00 |
| int _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 void |
| init_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; |
| |
| 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(boot_cpu_data.pdc.sys_model_name) == PDC_OK) |
| printk(KERN_INFO "model %s\n", |
| boot_cpu_data.pdc.sys_model_name); |
| |
| 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 init_per_cpu(int cpunum) |
| { |
| int ret; |
| struct pdc_coproc_cfg coproc_cfg; |
| |
| set_firmware_width(); |
| ret = pdc_coproc_cfg(&coproc_cfg); |
| |
| store_cpu_topology(cpunum); |
| |
| 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. |
| */ |
| int |
| show_cpuinfo (struct seq_file *m, void *v) |
| { |
| unsigned long cpu; |
| char cpu_name[60], *p; |
| |
| /* strip PA path from CPU name to not confuse lscpu */ |
| strlcpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name)); |
| p = strrchr(cpu_name, '['); |
| if (p) |
| *(--p) = 0; |
| |
| for_each_online_cpu(cpu) { |
| #ifdef CONFIG_SMP |
| const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu); |
| |
| 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_PARISC_CPU_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, |
| cpu_name); |
| |
| 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) |
| { |
| register_parisc_driver(&cpu_driver); |
| } |