| 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 | /** @addtogroup libcia64
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef LIBC_ia64_FIBRIL_H_
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| 36 | #define LIBC_ia64_FIBRIL_H_
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| 37 |
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| 38 | #include <types.h>
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| 39 | #include <align.h>
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| 40 | #include <libarch/stack.h>
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| 41 | #include <libarch/types.h>
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| 42 |
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| 43 | /*
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| 44 | * context_save() and context_restore() are both leaf procedures.
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| 45 | * No need to allocate scratch area.
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| 46 | */
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| 47 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
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| 48 |
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| 49 | #define PFM_MASK (~0x3fffffffff)
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| 50 |
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| 51 | #define PSTHREAD_INITIAL_STACK_PAGES_NO 2
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| 52 | /* Stack is divided into two equal parts (for memory stack and register stack). */
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| 53 | #define PSTHREAD_INITIAL_STACK_DIVISION 2
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| 54 |
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| 55 | #ifdef context_set
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| 56 | #undef context_set
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| 57 | #endif
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| 58 |
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| 59 | #define context_set(c, _pc, stack, size, tls) \
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| 60 | do { \
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| 61 | (c)->pc = (uint64_t) _pc; \
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| 62 | (c)->bsp = ((uint64_t) stack) + size / PSTHREAD_INITIAL_STACK_DIVISION; \
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| 63 | (c)->ar_pfs &= PFM_MASK; \
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| 64 | (c)->sp = ((uint64_t) stack) + ALIGN_UP((size / PSTHREAD_INITIAL_STACK_DIVISION), STACK_ALIGNMENT) - SP_DELTA; \
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| 65 | (c)->tp = (uint64_t) tls; \
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| 66 | } while (0);
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| 67 |
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| 68 |
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| 69 | /*
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| 70 | * Only save registers that must be preserved across
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| 71 | * function calls.
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| 72 | */
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| 73 | typedef struct context {
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| 74 |
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| 75 | /*
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| 76 | * Application registers
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| 77 | */
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| 78 | uint64_t ar_pfs;
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| 79 | uint64_t ar_unat_caller;
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| 80 | uint64_t ar_unat_callee;
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| 81 | uint64_t ar_rsc;
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| 82 | uint64_t bsp; /* ar_bsp */
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| 83 | uint64_t ar_rnat;
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| 84 | uint64_t ar_lc;
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| 85 |
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| 86 | /*
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| 87 | * General registers
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| 88 | */
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| 89 | uint64_t r1;
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| 90 | uint64_t r4;
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| 91 | uint64_t r5;
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| 92 | uint64_t r6;
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| 93 | uint64_t r7;
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| 94 | uint64_t sp; /* r12 */
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| 95 | uint64_t tp; /* r13 */
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| 96 |
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| 97 | /*
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| 98 | * Branch registers
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| 99 | */
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| 100 | uint64_t pc; /* b0 */
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| 101 | uint64_t b1;
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| 102 | uint64_t b2;
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| 103 | uint64_t b3;
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| 104 | uint64_t b4;
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| 105 | uint64_t b5;
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| 106 |
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| 107 | /*
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| 108 | * Predicate registers
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| 109 | */
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| 110 | uint64_t pr;
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| 111 |
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| 112 | __r128 f2 __attribute__ ((aligned(16)));
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| 113 | __r128 f3;
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| 114 | __r128 f4;
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| 115 | __r128 f5;
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| 116 |
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| 117 | __r128 f16;
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| 118 | __r128 f17;
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| 119 | __r128 f18;
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| 120 | __r128 f19;
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| 121 | __r128 f20;
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| 122 | __r128 f21;
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| 123 | __r128 f22;
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| 124 | __r128 f23;
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| 125 | __r128 f24;
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| 126 | __r128 f25;
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| 127 | __r128 f26;
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| 128 | __r128 f27;
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| 129 | __r128 f28;
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| 130 | __r128 f29;
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| 131 | __r128 f30;
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| 132 | __r128 f31;
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| 133 |
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| 134 | } context_t;
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| 135 |
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| 136 | #endif
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| 137 |
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| 138 | /** @}
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| 139 | */
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