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  1. /*
  2.  * Copyright (c) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup sparc64
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_sparc64_sun4v_CPU_H_
  36. #define KERN_sparc64_sun4v_CPU_H_
  37.  
  38. /* Maximum number of virtual processors. */
  39. #define MAX_NUM_STRANDS     64
  40.  
  41. /*
  42.  * Size of pair of pointers (one pointer to kernel stack,
  43.  * one to uspace window buffer).
  44.  */
  45. #define KSTACK_WBUF_PTR_SIZE    (2 * 8)
  46.  
  47. #ifndef __ASM__
  48.  
  49. /**
  50.  * Pair of two pointers, the first one points to the kernel stack of
  51.  * a userspace thread, the second one points to the userspace window
  52.  * buffer of the userspace thread. For each CPU there exists exactly
  53.  * one isntance of this structure.
  54.  */
  55. typedef struct {
  56.     uintptr_t kstack;
  57.     uintptr_t wbuf;
  58. } __attribute__ ((packed)) kstack_wbuf_ptr ;
  59.  
  60. typedef struct {
  61.     uint64_t id;            /**< virtual processor ID */
  62.     uint32_t mid;   // TODO: left here only to keep the code compilable!!!     
  63.     uint32_t clock_frequency;   /**< Processor frequency in Hz. */
  64.     uint64_t next_tick_cmpr;    /**< Next clock interrupt should be
  65.                          generated when the TICK register
  66.                          matches this value. */
  67. } cpu_arch_t;
  68.  
  69. #endif 
  70.  
  71. #ifdef __ASM__
  72.  
  73. /*
  74.  * Computes the pointer to the kstack_wbuf_ptr structure of the current CPU.
  75.  *
  76.  * Parameters:
  77.  *  tmpreg1     global register to be used for scratching purposes
  78.  *  result      register where the resulting pointer will be saved
  79.  */
  80. .macro get_kstack_wbuf_ptr tmpreg1, result
  81.     ! load CPUID to tmpreg1
  82.     or %g0, SCRATCHPAD_CPUID, \tmpreg1
  83.     ldxa [\tmpreg1] ASI_SCRATCHPAD, \tmpreg1
  84.  
  85.     ! compute offset within the array of kstack_wbuf_ptr structures (each
  86.     ! such structure is 16 bytes long)
  87.     mulx \tmpreg1, KSTACK_WBUF_PTR_SIZE, \tmpreg1
  88.  
  89.     ! compute the pointer to the structure for the current CPU
  90.     sethi %hi(kstack_wbuf_ptrs), \result
  91.     or \result, %lo(kstack_wbuf_ptrs), \result
  92.     add \result, \tmpreg1, \result
  93. .endm
  94.  
  95. #endif
  96.  
  97. #endif
  98.  
  99. /** @}
  100.  */
  101.