1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Common boot and setup code for both 32-bit and 64-bit.
51 #include <asm/rtas.h>
77 /* The main machine-dep calls structure
84 int boot_cpuid = -1;
88  * These are used in binfmt_elf.c to put aux entries on the stack
95  * This still seems to be needed... -- paulus
123 int crashing_cpu = -1;
126 /* also used by kexec */
170 /* Used by the G5 thermal driver */
224 	unsigned long cpu_id = (unsigned long)v - 1;  in show_cpuinfo()
240 	if (cur_cpu_spec->pvr_mask && cur_cpu_spec->cpu_name)  in show_cpuinfo()
241 		seq_puts(m, cur_cpu_spec->cpu_name);  in show_cpuinfo()
260 			seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",  in show_cpuinfo()
297 		default:	/* e500/book-e */  in show_cpuinfo()
305 				maj = ((pvr >> 8) & 0xFF) - 1;  in show_cpuinfo()
308 			case 0x004e: /* POWER9 bits 12-15 give chip type */  in show_cpuinfo()
341 		*pos = cpumask_next(*pos - 1, cpu_online_mask);  in c_start()
367 	DBG(" -> check_for_initrd()  initrd_start=0x%lx  initrd_end=0x%lx\n",  in check_for_initrd()
382 	DBG(" <- check_for_initrd()\n");  in check_for_initrd()
421  * setup_cpu_maps - initialize the following cpu maps:
459 		intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",  in smp_setup_cpu_maps()
462 			DBG("    ibm,ppc-interrupt-server#s -> %d threads\n",  in smp_setup_cpu_maps()
465 			DBG("    no ibm,ppc-interrupt-server#s -> 1 thread\n");  in smp_setup_cpu_maps()
480 			DBG("    thread %d -> cpu %d (hard id %d)\n",  in smp_setup_cpu_maps()
486 						"enable-method", "spin-table");  in smp_setup_cpu_maps()
512 	    (dn = of_find_node_by_path("/rtas"))) {  in smp_setup_cpu_maps()
519 		ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);  in smp_setup_cpu_maps()
545 	vdso_data->processorCount = num_present_cpus();  in smp_setup_cpu_maps()
573 		return -ENODEV;  in add_pcspkr()
575 	pd = platform_device_alloc("pcspkr", -1);  in add_pcspkr()
577 		return -ENOMEM;  in add_pcspkr()
614 		DBG("  %s ...", machine_id->name);  in probe_machine()
635 	int ret = -ENODEV;  in check_legacy_ioport()
696 	 * If firmware-assisted dump has been registered then trigger  in ppc_panic_event()
697 	 * firmware-assisted dump and let firmware handle everything else.  in ppc_panic_event()
740  * For platforms that have configurable cache-coherency.  This function
742  * left by the firmware, as indicated in the device tree.  Since a mismatch
756 	prop = of_get_property(np, "coherency-off", NULL);  in check_cache_coherency()
782 	pr_info("-----------------------------------------------------\n");  in print_system_info()
789 	pr_info("cpu_features      = 0x%016lx\n", cur_cpu_spec->cpu_features);  in print_system_info()
795 		cur_cpu_spec->cpu_user_features,  in print_system_info()
796 		cur_cpu_spec->cpu_user_features2);  in print_system_info()
797 	pr_info("mmu_features      = 0x%08x\n", cur_cpu_spec->mmu_features);  in print_system_info()
813 	pr_info("-----------------------------------------------------\n");  in print_system_info()
834  * Called into from start_kernel this initializes memblock, which is used
843 	/* Set a half-reasonable default so udelay does something sensible */  in setup_arch()
846 	/* Unflatten the device-tree passed by prom_init or kexec */  in setup_arch()
850 	 * Initialize cache line/block info from device-tree (on ppc64) or  in setup_arch()
855 	/* Initialize RTAS if available. */  in setup_arch()
858 	/* Check if we have an initrd provided via the device-tree. */  in setup_arch()
864 	/* Setup panic notifier if requested by the platform. */  in setup_arch()
868 	 * Configure ppc_md.power_save (ppc32 only, 64-bit machines do  in setup_arch()
879 	/* Setup the various CPU maps based on the device-tree. */  in setup_arch()
893 	 * we can map physical -> logical CPU ids.  in setup_arch()
895 	 * Freescale Book3e parts spin in a loop provided by firmware,  in setup_arch()
901 	/* On BookE, setup per-core TLB data structures. */  in setup_arch()
908 	/* Reserve large chunks of memory for use by CMA for KVM. */  in setup_arch()
911 	/*  Reserve large chunks of memory for us by CMA for hugetlb */  in setup_arch()
941 	/* Interrupt code needs to be 64K-aligned. */  in setup_arch()
943 		panic("Kernelbase not 64K-aligned (0x%lx)!\n",  in setup_arch()