| 1 | /*
|
|---|
| 2 | * Copyright (c) 2005 Jakub Jermar
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libcia64
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #ifndef LIBC_ia64_FIBRIL_H_
|
|---|
| 36 | #define LIBC_ia64_FIBRIL_H_
|
|---|
| 37 |
|
|---|
| 38 | #include <sys/types.h>
|
|---|
| 39 | #include <align.h>
|
|---|
| 40 | #include <libarch/stack.h>
|
|---|
| 41 | #include <libarch/types.h>
|
|---|
| 42 |
|
|---|
| 43 | /*
|
|---|
| 44 | * context_save() and context_restore() are both leaf procedures.
|
|---|
| 45 | * No need to allocate scratch area.
|
|---|
| 46 | */
|
|---|
| 47 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
|
|---|
| 48 |
|
|---|
| 49 | #define PFM_MASK (~0x3fffffffff)
|
|---|
| 50 |
|
|---|
| 51 | /* Stack is divided into two equal parts (for memory stack and register stack). */
|
|---|
| 52 | #define FIBRIL_INITIAL_STACK_DIVISION 2
|
|---|
| 53 |
|
|---|
| 54 | #define context_set(c, _pc, stack, size, tls) \
|
|---|
| 55 | do { \
|
|---|
| 56 | (c)->pc = (uint64_t) _pc; \
|
|---|
| 57 | (c)->bsp = ((uint64_t) stack) + \
|
|---|
| 58 | size / FIBRIL_INITIAL_STACK_DIVISION; \
|
|---|
| 59 | (c)->ar_pfs &= PFM_MASK; \
|
|---|
| 60 | (c)->sp = ((uint64_t) stack) + \
|
|---|
| 61 | ALIGN_UP((size / FIBRIL_INITIAL_STACK_DIVISION), STACK_ALIGNMENT) - \
|
|---|
| 62 | SP_DELTA; \
|
|---|
| 63 | (c)->tp = (uint64_t) tls; \
|
|---|
| 64 | } while (0)
|
|---|
| 65 |
|
|---|
| 66 | /*
|
|---|
| 67 | * Only save registers that must be preserved across
|
|---|
| 68 | * function calls.
|
|---|
| 69 | */
|
|---|
| 70 | typedef struct context {
|
|---|
| 71 |
|
|---|
| 72 | /*
|
|---|
| 73 | * Application registers
|
|---|
| 74 | */
|
|---|
| 75 | uint64_t ar_pfs;
|
|---|
| 76 | uint64_t ar_unat_caller;
|
|---|
| 77 | uint64_t ar_unat_callee;
|
|---|
| 78 | uint64_t ar_rsc;
|
|---|
| 79 | uint64_t bsp; /* ar_bsp */
|
|---|
| 80 | uint64_t ar_rnat;
|
|---|
| 81 | uint64_t ar_lc;
|
|---|
| 82 |
|
|---|
| 83 | /*
|
|---|
| 84 | * General registers
|
|---|
| 85 | */
|
|---|
| 86 | uint64_t r1;
|
|---|
| 87 | uint64_t r4;
|
|---|
| 88 | uint64_t r5;
|
|---|
| 89 | uint64_t r6;
|
|---|
| 90 | uint64_t r7;
|
|---|
| 91 | uint64_t sp; /* r12 */
|
|---|
| 92 | uint64_t tp; /* r13 */
|
|---|
| 93 |
|
|---|
| 94 | /*
|
|---|
| 95 | * Branch registers
|
|---|
| 96 | */
|
|---|
| 97 | uint64_t pc; /* b0 */
|
|---|
| 98 | uint64_t b1;
|
|---|
| 99 | uint64_t b2;
|
|---|
| 100 | uint64_t b3;
|
|---|
| 101 | uint64_t b4;
|
|---|
| 102 | uint64_t b5;
|
|---|
| 103 |
|
|---|
| 104 | /*
|
|---|
| 105 | * Predicate registers
|
|---|
| 106 | */
|
|---|
| 107 | uint64_t pr;
|
|---|
| 108 |
|
|---|
| 109 | uint128_t f2 __attribute__ ((aligned(16)));
|
|---|
| 110 | uint128_t f3;
|
|---|
| 111 | uint128_t f4;
|
|---|
| 112 | uint128_t f5;
|
|---|
| 113 |
|
|---|
| 114 | uint128_t f16;
|
|---|
| 115 | uint128_t f17;
|
|---|
| 116 | uint128_t f18;
|
|---|
| 117 | uint128_t f19;
|
|---|
| 118 | uint128_t f20;
|
|---|
| 119 | uint128_t f21;
|
|---|
| 120 | uint128_t f22;
|
|---|
| 121 | uint128_t f23;
|
|---|
| 122 | uint128_t f24;
|
|---|
| 123 | uint128_t f25;
|
|---|
| 124 | uint128_t f26;
|
|---|
| 125 | uint128_t f27;
|
|---|
| 126 | uint128_t f28;
|
|---|
| 127 | uint128_t f29;
|
|---|
| 128 | uint128_t f30;
|
|---|
| 129 | uint128_t f31;
|
|---|
| 130 |
|
|---|
| 131 | } context_t;
|
|---|
| 132 |
|
|---|
| 133 | static inline uintptr_t context_get_fp(context_t *ctx)
|
|---|
| 134 | {
|
|---|
| 135 | return 0; /* FIXME */
|
|---|
| 136 | }
|
|---|
| 137 |
|
|---|
| 138 | #endif
|
|---|
| 139 |
|
|---|
| 140 | /** @}
|
|---|
| 141 | */
|
|---|
