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3993 rimsky 1
/*
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 * Copyright (c) 2005 Jakub Jermar
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 * Copyright (c) 2009 Pavel Rimsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64interrupt
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 * @{
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 */
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#ifndef KERN_sparc64_sun4v_REGWIN_H_
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#define KERN_sparc64_sun4v_REGWIN_H_
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#ifdef __ASM__
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/*
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 * Saves the contents of the current window to the userspace window buffer.
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 * Does not modify any register window registers, but updates pointer to the
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 * top of the userspace window buffer.
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 *
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 * Parameters:
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 *  \tmpreg1    global register to be used for scratching purposes
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 *  \tmpreg2    global register to be used for scratching purposes
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 */
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.macro SAVE_TO_USPACE_WBUF tmpreg1, tmpreg2
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    get_kstack_wbuf_ptr \tmpreg1, \tmpreg2
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    ldx [\tmpreg2 + 8], \tmpreg1
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    stx %l0, [\tmpreg1 + L0_OFFSET]
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    stx %l1, [\tmpreg1 + L1_OFFSET]
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    stx %l2, [\tmpreg1 + L2_OFFSET]
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    stx %l3, [\tmpreg1 + L3_OFFSET]
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    stx %l4, [\tmpreg1 + L4_OFFSET]
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    stx %l5, [\tmpreg1 + L5_OFFSET]
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    stx %l6, [\tmpreg1 + L6_OFFSET]
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    stx %l7, [\tmpreg1 + L7_OFFSET]
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    stx %i0, [\tmpreg1 + I0_OFFSET]
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    stx %i1, [\tmpreg1 + I1_OFFSET]
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    stx %i2, [\tmpreg1 + I2_OFFSET]
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    stx %i3, [\tmpreg1 + I3_OFFSET]
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    stx %i4, [\tmpreg1 + I4_OFFSET]
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    stx %i5, [\tmpreg1 + I5_OFFSET]
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    stx %i6, [\tmpreg1 + I6_OFFSET]
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    stx %i7, [\tmpreg1 + I7_OFFSET]
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    add \tmpreg1, STACK_WINDOW_SAVE_AREA_SIZE, \tmpreg1
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    stx \tmpreg1, [\tmpreg2 + 8]
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.endm
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/*
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 * Macro used to spill userspace window to userspace window buffer.
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 * It is triggered from normal kernel code doing SAVE when
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 * OTHERWIN>0 at (TL=0).
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 */
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.macro SPILL_TO_USPACE_WINDOW_BUFFER
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    SAVE_TO_USPACE_WBUF %g7, %g4
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    saved
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    retry
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.endm
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#endif
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#endif
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/** @}
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 */