arch/mips/vr41xx/common/init.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  init.c, Common initialization routines for NEC VR4100 series.
   4  *
   5  *  Copyright (C) 2003-2009  Yoichi Yuasa <[email protected]>
   6  */
   7 #include <linux/init.h>
   8 #include <linux/ioport.h>
   9 #include <linux/irq.h>
  10 #include <linux/string.h>
  11
  12 #include <asm/bootinfo.h>
  13 #include <asm/time.h>
  14 #include <asm/vr41xx/irq.h>
  15 #include <asm/vr41xx/vr41xx.h>
  16
  17 #define IO_MEM_RESOURCE_START   0UL
  18 #define IO_MEM_RESOURCE_END     0x1fffffffUL
  19
  20 static void __init iomem_resource_init(void)
  21 {
  22         iomem_resource.start = IO_MEM_RESOURCE_START;
  23         iomem_resource.end = IO_MEM_RESOURCE_END;
  24 }
  25
  26 void __init plat_time_init(void)
  27 {
  28         unsigned long tclock;
  29
  30         vr41xx_calculate_clock_frequency();
  31
  32         tclock = vr41xx_get_tclock_frequency();
  33         if (current_cpu_data.processor_id == PRID_VR4131_REV2_0 ||
  34             current_cpu_data.processor_id == PRID_VR4131_REV2_1)
  35                 mips_hpt_frequency = tclock / 2;
  36         else
  37                 mips_hpt_frequency = tclock / 4;
  38 }
  39
  40 void __init plat_mem_setup(void)
  41 {
  42         iomem_resource_init();
  43
  44         vr41xx_siu_setup();
  45 }
  46
  47 void __init prom_init(void)
  48 {
  49         int argc, i;
  50         char **argv;
  51
  52         argc = fw_arg0;
  53         argv = (char **)fw_arg1;
  54
  55         for (i = 1; i < argc; i++) {
  56                 strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
  57                 if (i < (argc - 1))
  58                         strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
  59         }
  60 }