| 1 | /*
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| 2 | * Copyright (C) 2005 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef __sparc64_CONTEXT_H__
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| 30 | #define __sparc64_CONTEXT_H__
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| 31 |
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| 32 | #ifndef __sparc64_TYPES_H__
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| 33 | # include <arch/types.h>
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| 34 | #endif
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| 35 |
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| 36 | #ifndef __ALIGN_H__
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| 37 | # include <align.h>
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| 38 | #endif
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| 39 |
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| 40 | /** According to SPARC Compliance Definition, every stack frame is 16-byte aligned. */
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| 41 | #define STACK_ALIGNMENT 16
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| 42 |
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| 43 | #define STACK_ITEM_SIZE sizeof(__u64)
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| 44 |
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| 45 | /**
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| 46 | * 16-extended-word save area for %i[0-7] and %l[0-7] registers.
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| 47 | */
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| 48 | #define SAVE_AREA (16*STACK_ITEM_SIZE)
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| 49 | #define SP_DELTA SAVE_AREA
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| 50 |
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| 51 | /**
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| 52 | * By convention, the actual top of the stack is %sp + BIAS.
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| 53 | */
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| 54 | #define BIAS 2047
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| 55 |
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| 56 | #ifdef context_set
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| 57 | #undef context_set
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| 58 | #endif
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| 59 |
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| 60 | #define context_set(c, _pc, stack, size) \
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| 61 | (c)->pc = ((__address) _pc) - 8; \
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| 62 | (c)->sp = ((__address) stack) + ALIGN((size), STACK_ALIGNMENT) - (BIAS + SP_DELTA)
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| 63 |
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| 64 | /*
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| 65 | * Only save registers that must be preserved across
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| 66 | * function calls.
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| 67 | */
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| 68 | struct context {
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| 69 | __u64 l0;
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| 70 | __u64 l1;
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| 71 | __u64 l2;
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| 72 | __u64 l3;
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| 73 | __u64 l4;
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| 74 | __u64 l5;
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| 75 | __u64 l6;
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| 76 | __u64 l7;
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| 77 | __u64 i1;
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| 78 | __u64 i2;
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| 79 | __u64 i3;
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| 80 | __u64 i4;
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| 81 | __u64 i5;
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| 82 | __address sp; /* %i6 */
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| 83 | __address pc; /* %i7 */
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| 84 | ipl_t ipl;
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| 85 | };
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| 86 |
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| 87 | #endif
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