1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 1995-2001 Russell King
46 #include <asm/mach-types.h>
147 	u32 fiq[4];  member
307 		/* I-cache aliases will be handled by D-cache aliasing code */  in cpu_has_aliasing_icache()
360  * These functions re-use the assembly code in head.S, which
520  * cpu_init - initialise one CPU.
522  * cpu_init sets up the per-CPU stacks.
545 	 * In Thumb-2, msr with an immediate value is not allowed.  in cpu_init()
556 	 * setup stacks for re-entrant exception handlers  in cpu_init()
581 	      "I" (offsetof(struct stack, fiq[0])),  in cpu_init()
587 u32 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID };
612  * smp_build_mpidr_hash - Pre-compute shifts required at each affinity
613  *			  level in order to build a linear index from an
622 	 * Pre-scan the list of MPIDRS and filter out bits that do  in smp_build_mpidr_hash()
640 		fs[i] = affinity ? ffs(affinity) - 1 : 0;  in smp_build_mpidr_hash()
641 		bits[i] = ls - fs[i];  in smp_build_mpidr_hash()
644 	 * An index can be created from the MPIDR by isolating the  in smp_build_mpidr_hash()
654 	mpidr_hash.shift_aff[1] = MPIDR_LEVEL_BITS + fs[1] - bits[0];  in smp_build_mpidr_hash()
655 	mpidr_hash.shift_aff[2] = 2*MPIDR_LEVEL_BITS + fs[2] -  in smp_build_mpidr_hash()
677  * builds this table for us from the entries in arch/arm/mm/proc-*.S
698 	cpu_name = list->cpu_name;  in setup_processor()
701 	init_proc_vtable(list->proc);  in setup_processor()
703 	cpu_tlb = *list->tlb;  in setup_processor()
706 	cpu_user = *list->user;  in setup_processor()
709 	cpu_cache = *list->cache;  in setup_processor()
713 		list->cpu_name, midr, midr & 15,  in setup_processor()
716 	snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c",  in setup_processor()
717 		 list->arch_name, ENDIANNESS);  in setup_processor()
719 		 list->elf_name, ENDIANNESS);  in setup_processor()
720 	elf_hwcap = list->elf_hwcap;  in setup_processor()
729 	init_default_cache_policy(list->__cpu_mm_mmu_flags);  in setup_processor()
745 		early_print("%08x\t%s\n", p->nr, p->name);  in dump_machine_table()
765 		size -= aligned_start - start;  in arm_add_memory()
769 		pr_crit("Ignoring memory at 0x%08llx outside 32-bit physical address space\n",  in arm_add_memory()
771 		return -EINVAL;  in arm_add_memory()
775 		pr_crit("Truncating memory at 0x%08llx to fit in 32-bit physical address space\n",  in arm_add_memory()
778 		 * To ensure bank->start + bank->size is representable in  in arm_add_memory()
782 		size = ULONG_MAX - aligned_start;  in arm_add_memory()
788 			pr_info("Ignoring memory below PHYS_OFFSET: 0x%08llx-0x%08llx\n",  in arm_add_memory()
790 			return -EINVAL;  in arm_add_memory()
793 		pr_info("Ignoring memory below PHYS_OFFSET: 0x%08llx-0x%08llx\n",  in arm_add_memory()
796 		size -= PHYS_OFFSET - aligned_start;  in arm_add_memory()
801 	size = size & ~(phys_addr_t)(PAGE_SIZE - 1);  in arm_add_memory()
804 	 * Check whether this memory region has non-zero size or  in arm_add_memory()
808 		return -EINVAL;  in arm_add_memory()
834 			memblock_end_of_DRAM() - memblock_start_of_DRAM());  in early_mem()
855 	kernel_code.end     = virt_to_phys(__init_begin - 1);  in request_standard_resources()
857 	kernel_data.end     = virt_to_phys(_end - 1);  in request_standard_resources()
867 		res_end = end - 1;  in request_standard_resources()
872 		 * kexec-tools so they know where bootable RAM is located.  in request_standard_resources()
880 			res->name = "System RAM (boot alias)";  in request_standard_resources()
881 			res->start = boot_alias_start;  in request_standard_resources()
882 			res->end = phys_to_idmap(res_end);  in request_standard_resources()
883 			res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;  in request_standard_resources()
891 		res->name  = "System RAM";  in request_standard_resources()
892 		res->start = start;  in request_standard_resources()
893 		res->end = res_end;  in request_standard_resources()
894 		res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;  in request_standard_resources()
898 		if (kernel_code.start >= res->start &&  in request_standard_resources()
899 		    kernel_code.end <= res->end)  in request_standard_resources()
901 		if (kernel_data.start >= res->start &&  in request_standard_resources()
902 		    kernel_data.end <= res->end)  in request_standard_resources()
906 	if (mdesc->video_start) {  in request_standard_resources()
907 		video_ram.start = mdesc->video_start;  in request_standard_resources()
908 		video_ram.end   = mdesc->video_end;  in request_standard_resources()
916 	if (mdesc->reserve_lp0)  in request_standard_resources()
918 	if (mdesc->reserve_lp1)  in request_standard_resources()
920 	if (mdesc->reserve_lp2)  in request_standard_resources()
944 	if (machine_desc->init_machine)  in customize_machine()
945 		machine_desc->init_machine();  in customize_machine()
956 	if (machine_desc->init_late)  in init_machine_late()
957 		machine_desc->init_late();  in init_machine_late()
961 		ret = of_property_read_string(root, "serial-number",  in init_machine_late()
987 	total = max_low_pfn - min_low_pfn;  in get_total_mem()
992  * reserve_crashkernel() - reserves memory are for crash kernel
1013 		unsigned long long lowmem_max = __pa(high_memory - 1) + 1;  in reserve_crashkernel()
1020 			pr_err("crashkernel reservation failed - No suitable area found.\n");  in reserve_crashkernel()
1030 			pr_err("crashkernel reservation failed - memory is in use.\n");  in reserve_crashkernel()
1042 	crashk_res.end = crash_base + crash_size - 1;  in reserve_crashkernel()
1056 		crashk_boot_res.end = crashk_boot_res.start + crash_size - 1;  in reserve_crashkernel()
1122 	machine_name = mdesc->name;  in setup_arch()
1123 	dump_stack_set_arch_desc("%s", mdesc->name);  in setup_arch()
1125 	if (mdesc->reboot_mode != REBOOT_HARD)  in setup_arch()
1126 		reboot_mode = mdesc->reboot_mode;  in setup_arch()
1160 	if (mdesc->restart) {  in setup_arch()
1161 		__arm_pm_restart = mdesc->restart;  in setup_arch()
1171 		if (!mdesc->smp_init || !mdesc->smp_init()) {  in setup_arch()
1174 			else if (mdesc->smp)  in setup_arch()
1175 				smp_set_ops(mdesc->smp);  in setup_arch()
1188 	handle_arch_irq = mdesc->handle_irq;  in setup_arch()
1197 	if (mdesc->init_early)  in setup_arch()
1198 		mdesc->init_early();  in setup_arch()
1208 		cpuinfo->cpu.hotpluggable = platform_can_hotplug_cpu(cpu);  in topology_init()
1209 		register_cpu(&cpuinfo->cpu, cpu);  in topology_init()
1223 		return -ENOMEM;  in proc_cpu_init()
1305 			/* pre-ARM7 */  in c_show()
1313 				/* post-ARM7 */  in c_show()