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  1. /*
  2.  * Copyright (c) 2005 Jakub Jermar
  3.  * Copyright (c) 2009 Pavel Rimsky
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup sparc64
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <cpu.h>
  37. #include <arch.h>
  38. #include <genarch/ofw/ofw_tree.h>
  39. #include <arch/drivers/tick.h>
  40. #include <print.h>
  41. #include <arch/sun4v/md.h>
  42. #include <arch/sun4v/hypercall.h>
  43. #include <arch/trap/sun4v/interrupt.h>
  44.  
  45. /** Perform sparc64 specific initialization of the processor structure for the
  46.  * current processor.
  47.  */
  48. void cpu_arch_init(void)
  49. {
  50.     uint64_t myid;
  51.     __hypercall_fast_ret1(0, 0, 0, 0, 0, CPU_MYID, &myid);
  52.  
  53.     CPU->arch.id = myid;
  54.  
  55.     md_node_t node = md_get_root();
  56.  
  57.     /* walk through MD, find the current CPU node & its clock-frequency */
  58.     while (true) {
  59.         if (!md_next_node(&node, "cpu")) {
  60.             panic("Could not determine CPU frequency.");
  61.         }
  62.  
  63.         uint64_t id = 0;
  64.         md_get_integer_property(node, "id", &id);
  65.  
  66.         if (id == myid) {
  67.             uint64_t clock_frequency = 0;
  68.             md_get_integer_property(node, "clock-frequency",
  69.                 &clock_frequency);
  70.             CPU->arch.clock_frequency = clock_frequency;
  71.             break;
  72.         }
  73.     }
  74.  
  75.     tick_init();
  76.     sun4v_ipi_init();
  77. }
  78.  
  79. /**
  80.  * Implemented as an empty function as accessing the VER register is
  81.  * a hyperprivileged operation on sun4v.
  82.  */
  83. void cpu_identify(void)
  84. {
  85. }
  86.  
  87. /** Print version information for a processor.
  88.  *
  89.  * This function is called by the bootstrap processor.
  90.  *
  91.  * @param m Processor structure of the CPU for which version information is to
  92.  *  be printed.
  93.  */
  94. void cpu_print_report(cpu_t *m)
  95. {
  96.     printf("cpu%d: Niagara (%d MHz)\n", m->id,
  97.         m->arch.clock_frequency / 1000000);
  98. }
  99.  
  100. /** @}
  101.  */
  102.