arch/arm/cpu/armv8/fsl-lsch3/fdt.c

   1 /*
   2  * Copyright 2014 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <libfdt.h>
   9 #include <fdt_support.h>
  10 #include "mp.h"
  11
  12 #ifdef CONFIG_MP
  13 void ft_fixup_cpu(void *blob)
  14 {
  15         int off;
  16         __maybe_unused u64 spin_tbl_addr = (u64)get_spin_tbl_addr();
  17         fdt32_t *reg;
  18         int addr_cells;
  19         u64 val, core_id;
  20         size_t *boot_code_size = &(__secondary_boot_code_size);
  21
  22         off = fdt_path_offset(blob, "/cpus");
  23         if (off < 0) {
  24                 puts("couldn't find /cpus node\n");
  25                 return;
  26         }
  27         of_bus_default_count_cells(blob, off, &addr_cells, NULL);
  28
  29         off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
  30         while (off != -FDT_ERR_NOTFOUND) {
  31                 reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
  32                 core_id = of_read_number(reg, addr_cells);
  33                 if (reg) {
  34                         if (core_id  == 0 || (is_core_online(core_id))) {
  35                                 val = spin_tbl_addr;
  36                                 val += id_to_core(core_id) *
  37                                        SPIN_TABLE_ELEM_SIZE;
  38                                 val = cpu_to_fdt64(val);
  39                                 fdt_setprop_string(blob, off, "enable-method",
  40                                                    "spin-table");
  41                                 fdt_setprop(blob, off, "cpu-release-addr",
  42                                             &val, sizeof(val));
  43                         } else {
  44                                 debug("skipping offline core\n");
  45                         }
  46                 } else {
  47                         puts("Warning: found cpu node without reg property\n");
  48                 }
  49                 off = fdt_node_offset_by_prop_value(blob, off, "device_type",
  50                                                     "cpu", 4);
  51         }
  52
  53         fdt_add_mem_rsv(blob, (uintptr_t)&secondary_boot_code,
  54                         *boot_code_size);
  55 }
  56 #endif
  57
  58 void ft_cpu_setup(void *blob, bd_t *bd)
  59 {
  60 #ifdef CONFIG_MP
  61         ft_fixup_cpu(blob);
  62 #endif
  63
  64 #ifdef CONFIG_SYS_NS16550
  65         do_fixup_by_compat_u32(blob, "ns16550",
  66                                "clock-frequency", CONFIG_SYS_NS16550_CLK, 1);
  67 #endif
  68 }