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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 sparc64interrupt
  31.  * @{
  32.  */
  33. #ifndef KERN_sparc64_sun4v_REGWIN_H_
  34. #define KERN_sparc64_sun4v_REGWIN_H_
  35.  
  36. #ifdef __ASM__
  37.  
  38. /*
  39.  * Saves the contents of the current window to the userspace window buffer.
  40.  * Does not modify any register window registers, but updates pointer to the
  41.  * top of the userspace window buffer.
  42.  *
  43.  * Parameters:
  44.  *  \tmpreg1    global register to be used for scratching purposes
  45.  *  \tmpreg2    global register to be used for scratching purposes
  46.  */
  47. .macro SAVE_TO_USPACE_WBUF tmpreg1, tmpreg2
  48.     set SCRATCHPAD_WBUF, \tmpreg2
  49.     ldxa [\tmpreg2] ASI_SCRATCHPAD, \tmpreg1
  50.     stx %l0, [\tmpreg1 + L0_OFFSET]
  51.     stx %l1, [\tmpreg1 + L1_OFFSET]
  52.     stx %l2, [\tmpreg1 + L2_OFFSET]
  53.     stx %l3, [\tmpreg1 + L3_OFFSET]
  54.     stx %l4, [\tmpreg1 + L4_OFFSET]
  55.     stx %l5, [\tmpreg1 + L5_OFFSET]
  56.     stx %l6, [\tmpreg1 + L6_OFFSET]
  57.     stx %l7, [\tmpreg1 + L7_OFFSET]
  58.     stx %i0, [\tmpreg1 + I0_OFFSET]
  59.     stx %i1, [\tmpreg1 + I1_OFFSET]
  60.     stx %i2, [\tmpreg1 + I2_OFFSET]
  61.     stx %i3, [\tmpreg1 + I3_OFFSET]
  62.     stx %i4, [\tmpreg1 + I4_OFFSET]
  63.     stx %i5, [\tmpreg1 + I5_OFFSET]
  64.     stx %i6, [\tmpreg1 + I6_OFFSET]
  65.     stx %i7, [\tmpreg1 + I7_OFFSET]
  66.     add \tmpreg1, STACK_WINDOW_SAVE_AREA_SIZE, \tmpreg1
  67.     stxa \tmpreg1, [\tmpreg2] ASI_SCRATCHPAD
  68. .endm
  69.  
  70. /*
  71.  * Macro used to spill userspace window to userspace window buffer.
  72.  * It is triggered from normal kernel code doing SAVE when
  73.  * OTHERWIN>0 at (TL=0).
  74.  */
  75. .macro SPILL_TO_USPACE_WINDOW_BUFFER
  76.     SAVE_TO_USPACE_WBUF %g7, %g4
  77.     saved
  78.     retry
  79. .endm
  80.  
  81. #endif
  82.  
  83. #endif
  84.  
  85. /** @}
  86.  */
  87.