arch/mips/paravirt/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2013 Cavium, Inc.
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/kvm_para.h>
  11
  12 #include <asm/reboot.h>
  13 #include <asm/bootinfo.h>
  14 #include <asm/smp-ops.h>
  15 #include <asm/time.h>
  16
  17 extern const struct plat_smp_ops paravirt_smp_ops;
  18
  19 const char *get_system_type(void)
  20 {
  21         return "MIPS Para-Virtualized Guest";
  22 }
  23
  24 void __init plat_time_init(void)
  25 {
  26         mips_hpt_frequency = kvm_hypercall0(KVM_HC_MIPS_GET_CLOCK_FREQ);
  27
  28         preset_lpj = mips_hpt_frequency / (2 * HZ);
  29 }
  30
  31 static void pv_machine_halt(void)
  32 {
  33         kvm_hypercall0(KVM_HC_MIPS_EXIT_VM);
  34 }
  35
  36 /*
  37  * Early entry point for arch setup
  38  */
  39 void __init prom_init(void)
  40 {
  41         int i;
  42         int argc = fw_arg0;
  43         char **argv = (char **)fw_arg1;
  44
  45 #ifdef CONFIG_32BIT
  46         set_io_port_base(KSEG1ADDR(0x1e000000));
  47 #else /* CONFIG_64BIT */
  48         set_io_port_base(PHYS_TO_XKSEG_UNCACHED(0x1e000000));
  49 #endif
  50
  51         for (i = 0; i < argc; i++) {
  52                 strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
  53                 if (i < argc - 1)
  54                         strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
  55         }
  56         _machine_halt = pv_machine_halt;
  57         register_smp_ops(&paravirt_smp_ops);
  58 }
  59
  60 void __init plat_mem_setup(void)
  61 {
  62         /* Do nothing, the "mem=???" parser handles our memory. */
  63 }
  64
  65 void __init prom_free_prom_memory(void)
  66 {
  67 }