| 1 | /*
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| 2 | * Copyright (c) 2005 Jakub Jermar
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| 3 | * Copyright (c) 2009 Pavel Rimsky
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup sparc64interrupt
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| 31 | * @{
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| 32 | */
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| 33 | #ifndef KERN_sparc64_sun4v_REGWIN_H_
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| 34 | #define KERN_sparc64_sun4v_REGWIN_H_
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| 35 |
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| 36 | #ifdef __ASM__
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| 37 |
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| 38 | /*
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| 39 | * Saves the contents of the current window to the userspace window buffer.
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| 40 | * Does not modify any register window registers, but updates pointer to the
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| 41 | * top of the userspace window buffer.
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| 42 | *
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| 43 | * Parameters:
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| 44 | * \tmpreg1 global register to be used for scratching purposes
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| 45 | * \tmpreg2 global register to be used for scratching purposes
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| 46 | */
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| 47 | .macro SAVE_TO_USPACE_WBUF tmpreg1, tmpreg2
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| 48 | set SCRATCHPAD_WBUF, \tmpreg2
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| 49 | ldxa [\tmpreg2] ASI_SCRATCHPAD, \tmpreg1
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| 50 | stx %l0, [\tmpreg1 + L0_OFFSET]
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| 51 | stx %l1, [\tmpreg1 + L1_OFFSET]
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| 52 | stx %l2, [\tmpreg1 + L2_OFFSET]
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| 53 | stx %l3, [\tmpreg1 + L3_OFFSET]
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| 54 | stx %l4, [\tmpreg1 + L4_OFFSET]
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| 55 | stx %l5, [\tmpreg1 + L5_OFFSET]
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| 56 | stx %l6, [\tmpreg1 + L6_OFFSET]
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| 57 | stx %l7, [\tmpreg1 + L7_OFFSET]
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| 58 | stx %i0, [\tmpreg1 + I0_OFFSET]
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| 59 | stx %i1, [\tmpreg1 + I1_OFFSET]
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| 60 | stx %i2, [\tmpreg1 + I2_OFFSET]
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| 61 | stx %i3, [\tmpreg1 + I3_OFFSET]
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| 62 | stx %i4, [\tmpreg1 + I4_OFFSET]
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| 63 | stx %i5, [\tmpreg1 + I5_OFFSET]
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| 64 | stx %i6, [\tmpreg1 + I6_OFFSET]
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| 65 | stx %i7, [\tmpreg1 + I7_OFFSET]
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| 66 | add \tmpreg1, STACK_WINDOW_SAVE_AREA_SIZE, \tmpreg1
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| 67 | stxa \tmpreg1, [\tmpreg2] ASI_SCRATCHPAD
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| 68 | .endm
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| 69 |
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| 70 | /*
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| 71 | * Macro used to spill userspace window to userspace window buffer.
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| 72 | * It is triggered from normal kernel code doing SAVE when
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| 73 | * OTHERWIN>0 at (TL=0).
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| 74 | */
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| 75 | .macro SPILL_TO_USPACE_WINDOW_BUFFER
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| 76 | SAVE_TO_USPACE_WBUF %g7, %g4
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| 77 | saved
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| 78 | retry
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| 79 | .endm
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| 80 |
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| 81 | #endif
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| 82 |
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| 83 | #endif
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| 84 |
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| 85 | /** @}
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| 86 | */
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