1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Common boot and setup code for both 32-bit and 64-bit.
74 #define DBG(fmt...) udbg_printf(fmt)  macro
76 #define DBG(fmt...)  macro
79 /* The main machine-dep calls structure
86 int boot_cpuid = -1;
88 int __initdata boot_core_hwid = -1;
91 int boot_cpu_hwid = -1;
115 int crashing_cpu = -1;
177 	if (ppc_md.halt)  in machine_halt()
178 		ppc_md.halt();  in machine_halt()
222 	unsigned long cpu_id = (unsigned long)v - 1;  in show_cpuinfo()
238 	if (cur_cpu_spec->pvr_mask && cur_cpu_spec->cpu_name)  in show_cpuinfo()
239 		seq_puts(m, cur_cpu_spec->cpu_name);  in show_cpuinfo()
258 			seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",  in show_cpuinfo()
292 		default:	/* e500/book-e */  in show_cpuinfo()
300 				maj = ((pvr >> 8) & 0xFF) - 1;  in show_cpuinfo()
303 			case 0x004e: /* POWER9 bits 12-15 give chip type */  in show_cpuinfo()
336 		*pos = cpumask_next(*pos - 1, cpu_online_mask);  in c_start()
362 	DBG(" -> check_for_initrd()  initrd_start=0x%lx  initrd_end=0x%lx\n",  in check_for_initrd()
377 	DBG(" <- check_for_initrd()\n");  in check_for_initrd()
423 		DBG("    thread %d -> cpu %d (hard id %d)\n", i, cpu, hwid);  in assign_threads()
435  * setup_cpu_maps - initialize the following cpu maps:
458 	DBG("smp_setup_cpu_maps()\n");  in smp_setup_cpu_maps()
471 		DBG("  * %pOF...\n", dn);  in smp_setup_cpu_maps()
473 		intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",  in smp_setup_cpu_maps()
476 			DBG("    ibm,ppc-interrupt-server#s -> %lu threads\n",  in smp_setup_cpu_maps()
479 			DBG("    no ibm,ppc-interrupt-server#s -> 1 thread\n");  in smp_setup_cpu_maps()
494 					"enable-method", "spin-table");  in smp_setup_cpu_maps()
520 		DBG("  SMT disabled ! nthreads forced to 1\n");  in smp_setup_cpu_maps()
537 		ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);  in smp_setup_cpu_maps()
563 	vdso_data->processorCount = num_present_cpus();  in smp_setup_cpu_maps()
591 		return -ENODEV;  in add_pcspkr()
593 	pd = platform_device_alloc("pcspkr", -1);  in add_pcspkr()
595 		return -ENOMEM;  in add_pcspkr()
624 	DBG("Probing machine type ...\n");  in probe_machine()
640 		DBG("  %s ...\n", machine_id->name);  in probe_machine()
641 		if (machine_id->compatible && !of_machine_is_compatible(machine_id->compatible))  in probe_machine()
643 		if (machine_id->compatibles && !of_machine_compatible_match(machine_id->compatibles))  in probe_machine()
648 		DBG("   %s match !\n", machine_id->name);  in probe_machine()
670 	int ret = -ENODEV;  in check_legacy_ioport()
726  * - ppc_panic_fadump_handler() is a hypervisor notifier, which hard-disables
727  *   IRQs and deal with the Firmware-Assisted dump, when it is configured;
730  * - dump_kernel_offset() is an informative notifier, just showing the KASLR
733  * - ppc_panic_platform_handler() is a low-level handler that's registered
748 	 * If firmware-assisted dump has been registered then trigger  in ppc_panic_fadump_handler()
794 	/* Hard-disables IRQs + deal with FW-assisted dump (fadump) */  in setup_panic()
802 	/* Low-level platform-specific routines that should run on panic */  in setup_panic()
810  * For platforms that have configurable cache-coherency.  This function
826 	prop = of_get_property(np, "coherency-off", NULL);  in check_cache_coherency()
852 	pr_info("-----------------------------------------------------\n");  in print_system_info()
859 	pr_info("cpu_features      = 0x%016lx\n", cur_cpu_spec->cpu_features);  in print_system_info()
865 		cur_cpu_spec->cpu_user_features,  in print_system_info()
866 		cur_cpu_spec->cpu_user_features2);  in print_system_info()
867 	pr_info("mmu_features      = 0x%08x\n", cur_cpu_spec->mmu_features);  in print_system_info()
883 	pr_info("-----------------------------------------------------\n");  in print_system_info()
913 	/* Set a half-reasonable default so udelay does something sensible */  in setup_arch()
916 	/* Unflatten the device-tree passed by prom_init or kexec */  in setup_arch()
920 	 * Initialize cache line/block info from device-tree (on ppc64) or  in setup_arch()
928 	/* Check if we have an initrd provided via the device-tree. */  in setup_arch()
938 	 * Configure ppc_md.power_save (ppc32 only, 64-bit machines do  in setup_arch()
949 	/* Setup the various CPU maps based on the device-tree. */  in setup_arch()
966 	 * we can map physical -> logical CPU ids.  in setup_arch()
974 	/* On BookE, setup per-core TLB data structures. */  in setup_arch()
1019 	/* Interrupt code needs to be 64K-aligned. */  in setup_arch()
1021 		panic("Kernelbase not 64K-aligned (0x%lx)!\n",  in setup_arch()