1 // SPDX-License-Identifier: GPL-2.0-only
24 #include <asm/mach-types.h>
39 	if (of_property_read_string(node, "enable-method", &method))  in set_smp_ops_by_method()
42 	for (; m->method; m++)  in set_smp_ops_by_method()
43 		if (!strcmp(m->method, method)) {  in set_smp_ops_by_method()
44 			smp_set_ops(m->ops);  in set_smp_ops_by_method()
59  * arm_dt_init_cpu_maps - Function retrieves cpu nodes from the device tree
60  * and builds the cpu logical map array containing MPIDR values related to
63  * Updates the cpu possible mask with the number of parsed cpu nodes
68 	 * Temp logical map is initialized with UINT_MAX values that are  in arm_dt_init_cpu_maps()
69 	 * considered invalid logical map entries since the logical map must  in arm_dt_init_cpu_maps()
73 	struct device_node *cpu, *cpus;  in arm_dt_init_cpu_maps()  local
78 	u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID };  in arm_dt_init_cpu_maps()
85 	for_each_of_cpu_node(cpu) {  in arm_dt_init_cpu_maps()
86 		u32 hwid = of_get_cpu_hwid(cpu, 0);  in arm_dt_init_cpu_maps()
88 		pr_debug(" * %pOF...\n", cpu);  in arm_dt_init_cpu_maps()
95 			of_node_put(cpu);  in arm_dt_init_cpu_maps()
108 				 "Duplicate /cpu reg properties in the DT\n")) {  in arm_dt_init_cpu_maps()
109 				of_node_put(cpu);  in arm_dt_init_cpu_maps()
115 		 * requires that if detected the boot CPU must be assigned  in arm_dt_init_cpu_maps()
117 		 * from 1. If a CPU node with a reg property matching the  in arm_dt_init_cpu_maps()
118 		 * boot CPU MPIDR is detected, this is recorded so that the  in arm_dt_init_cpu_maps()
119 		 * logical map built from DT is validated and can be used  in arm_dt_init_cpu_maps()
120 		 * to override the map created in smp_setup_processor_id().  in arm_dt_init_cpu_maps()
129 		if (WARN(cpuidx > nr_cpu_ids, "DT /cpu %u nodes greater than "  in arm_dt_init_cpu_maps()
133 			of_node_put(cpu);  in arm_dt_init_cpu_maps()
140 			found_method = set_smp_ops_by_method(cpu);  in arm_dt_init_cpu_maps()
144 	 * Fallback to an enable-method in the cpus node if nothing found in  in arm_dt_init_cpu_maps()
145 	 * a cpu node.  in arm_dt_init_cpu_maps()
151 		pr_warn("DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map\n");  in arm_dt_init_cpu_maps()
156 	 * Since the boot CPU node contains proper data, and all nodes have  in arm_dt_init_cpu_maps()
157 	 * a reg property, the DT CPU list can be considered valid and the  in arm_dt_init_cpu_maps()
158 	 * logical map created in smp_setup_processor_id() can be overridden  in arm_dt_init_cpu_maps()
163 		pr_debug("cpu logical map 0x%x\n", cpu_logical_map(i));  in arm_dt_init_cpu_maps()
167 bool arch_match_cpu_phys_id(int cpu, u64 phys_id)  in arch_match_cpu_phys_id()  argument
169 	return phys_id == cpu_logical_map(cpu);  in arch_match_cpu_phys_id()
181 	*match = m->dt_compat;  in arch_get_next_mach()
186  * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
220 			size -= strlen(prop) + 1;  in setup_machine_fdt()
229 	if (mdesc->dt_fixup)  in setup_machine_fdt()
230 		mdesc->dt_fixup();  in setup_machine_fdt()
235 	__machine_arch_type = mdesc->nr;  in setup_machine_fdt()