^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/kernel/devtree.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/cputype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/smp_plat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/mach/arch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/mach-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) extern struct of_cpu_method __cpu_method_of_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static const struct of_cpu_method __cpu_method_of_table_sentinel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) __used __section("__cpu_method_of_table_end");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int __init set_smp_ops_by_method(struct device_node *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) const char *method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct of_cpu_method *m = __cpu_method_of_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (of_property_read_string(node, "enable-method", &method))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) for (; m->method; m++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!strcmp(m->method, method)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) smp_set_ops(m->ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static inline int set_smp_ops_by_method(struct device_node *node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * arm_dt_init_cpu_maps - Function retrieves cpu nodes from the device tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * and builds the cpu logical map array containing MPIDR values related to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * logical cpus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Updates the cpu possible mask with the number of parsed cpu nodes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) void __init arm_dt_init_cpu_maps(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Temp logical map is initialized with UINT_MAX values that are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * considered invalid logical map entries since the logical map must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * contain a list of MPIDR[23:0] values where MPIDR[31:24] must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * read as 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct device_node *cpu, *cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int found_method = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u32 i, j, cpuidx = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u32 tmp_map[NR_CPUS] = { [0 ... NR_CPUS-1] = MPIDR_INVALID };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) bool bootcpu_valid = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) cpus = of_find_node_by_path("/cpus");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) for_each_of_cpu_node(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) const __be32 *cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int prop_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u32 hwid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pr_debug(" * %pOF...\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * A device tree containing CPU nodes with missing "reg"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * properties is considered invalid to build the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * cpu_logical_map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) cell = of_get_property(cpu, "reg", &prop_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (!cell || prop_bytes < sizeof(*cell)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pr_debug(" * %pOF missing reg property\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) of_node_put(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * Bits n:24 must be set to 0 in the DT since the reg property
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * defines the MPIDR[23:0].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) hwid = be32_to_cpu(*cell++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) prop_bytes -= sizeof(*cell);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) } while (!hwid && prop_bytes > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (prop_bytes || (hwid & ~MPIDR_HWID_BITMASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) of_node_put(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Duplicate MPIDRs are a recipe for disaster.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Scan all initialized entries and check for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * duplicates. If any is found just bail out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * temp values were initialized to UINT_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * to avoid matching valid MPIDR[23:0] values.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) for (j = 0; j < cpuidx; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (WARN(tmp_map[j] == hwid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "Duplicate /cpu reg properties in the DT\n")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) of_node_put(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) * Build a stashed array of MPIDR values. Numbering scheme
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * requires that if detected the boot CPU must be assigned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * logical id 0. Other CPUs get sequential indexes starting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * from 1. If a CPU node with a reg property matching the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * boot CPU MPIDR is detected, this is recorded so that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * logical map built from DT is validated and can be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * to override the map created in smp_setup_processor_id().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (hwid == mpidr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) bootcpu_valid = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) i = cpuidx++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (WARN(cpuidx > nr_cpu_ids, "DT /cpu %u nodes greater than "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) "max cores %u, capping them\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) cpuidx, nr_cpu_ids)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) cpuidx = nr_cpu_ids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) of_node_put(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) tmp_map[i] = hwid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!found_method)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) found_method = set_smp_ops_by_method(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * Fallback to an enable-method in the cpus node if nothing found in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * a cpu node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!found_method)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) set_smp_ops_by_method(cpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (!bootcpu_valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) pr_warn("DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * Since the boot CPU node contains proper data, and all nodes have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * a reg property, the DT CPU list can be considered valid and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * logical map created in smp_setup_processor_id() can be overridden
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) for (i = 0; i < cpuidx; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) set_cpu_possible(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) cpu_logical_map(i) = tmp_map[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) pr_debug("cpu logical map 0x%x\n", cpu_logical_map(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return phys_id == cpu_logical_map(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static const void * __init arch_get_next_mach(const char *const **match)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static const struct machine_desc *mdesc = __arch_info_begin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) const struct machine_desc *m = mdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (m >= __arch_info_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) mdesc++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) *match = m->dt_compat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * @dt_virt: virtual address of dt blob
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * If a dtb was passed to the kernel in r2, then use it to choose the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * correct machine_desc and to setup the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) const struct machine_desc * __init setup_machine_fdt(void *dt_virt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) const struct machine_desc *mdesc, *mdesc_best = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #if defined(CONFIG_ARCH_MULTIPLATFORM) || defined(CONFIG_ARM_SINGLE_ARMV7M)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) DT_MACHINE_START(GENERIC_DT, "Generic DT based system")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) .l2c_aux_val = 0x0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .l2c_aux_mask = ~0x0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) MACHINE_END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) mdesc_best = &__mach_desc_GENERIC_DT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (!dt_virt || !early_init_dt_verify(dt_virt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) mdesc = of_flat_dt_match_machine(mdesc_best, arch_get_next_mach);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (!mdesc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) const char *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) unsigned long dt_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) early_print("\nError: unrecognized/unsupported "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) "device tree compatible list:\n[ ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) dt_root = of_get_flat_dt_root();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) while (size > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) early_print("'%s' ", prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) size -= strlen(prop) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) prop += strlen(prop) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) early_print("]\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) dump_machine_table(); /* does not return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /* We really don't want to do this, but sometimes firmware provides buggy data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (mdesc->dt_fixup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) mdesc->dt_fixup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) early_init_dt_scan_nodes();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Change machine number to match the mdesc we're using */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) __machine_arch_type = mdesc->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return mdesc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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