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| Rev | Author | Line No. | Line |
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| 1125 | jermar | 1 | /* |
| 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 | |||
| 29 | #ifndef __LIBC__ia64PSTHREAD_H__ |
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| 30 | #define __LIBC__ia64PSTHREAD_H__ |
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| 31 | |||
| 32 | #include <types.h> |
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| 33 | #include <align.h> |
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| 34 | #include <libarch/stack.h> |
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| 35 | |||
| 36 | /* |
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| 37 | * context_save() and context_restore() are both leaf procedures. |
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| 38 | * No need to allocate scratch area. |
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| 39 | */ |
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| 40 | #define SP_DELTA (0+ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
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| 41 | |||
| 42 | #define PFM_MASK (~0x3fffffffff) |
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| 43 | |||
| 1155 | vana | 44 | #define PSTHREAD_INITIAL_STACK_PAGES_NO 2 |
| 1175 | jermar | 45 | /* Stack is divided into two equal parts (for memory stack and register stack). */ |
| 46 | #define PSTHREAD_INITIAL_STACK_DIVISION 2 |
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| 1155 | vana | 47 | |
| 1125 | jermar | 48 | #ifdef context_set |
| 49 | #undef context_set |
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| 50 | #endif |
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| 51 | |||
| 52 | #define context_set(c, _pc, stack, size, tls) \ |
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| 53 | do { \ |
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| 54 | (c)->pc = (uint64_t) _pc; \ |
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| 1155 | vana | 55 | (c)->bsp = ((uint64_t) stack) + size / PSTHREAD_INITIAL_STACK_DIVISION; \ |
| 1125 | jermar | 56 | (c)->ar_pfs &= PFM_MASK; \ |
| 1155 | vana | 57 | (c)->sp = ((uint64_t) stack) + ALIGN_UP((size / PSTHREAD_INITIAL_STACK_DIVISION), STACK_ALIGNMENT) - SP_DELTA; \ |
| 1125 | jermar | 58 | (c)->tp = (uint64_t) tls; \ |
| 59 | } while (0); |
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| 60 | |||
| 61 | |||
| 62 | /* |
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| 63 | * Only save registers that must be preserved across |
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| 64 | * function calls. |
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| 65 | */ |
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| 66 | typedef struct context { |
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| 67 | |||
| 68 | /* |
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| 69 | * Application registers |
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| 70 | */ |
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| 71 | uint64_t ar_pfs; |
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| 72 | uint64_t ar_unat_caller; |
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| 73 | uint64_t ar_unat_callee; |
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| 74 | uint64_t ar_rsc; |
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| 75 | uint64_t bsp; /* ar_bsp */ |
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| 76 | uint64_t ar_rnat; |
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| 77 | uint64_t ar_lc; |
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| 78 | |||
| 79 | /* |
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| 80 | * General registers |
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| 81 | */ |
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| 82 | uint64_t r1; |
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| 83 | uint64_t r4; |
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| 84 | uint64_t r5; |
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| 85 | uint64_t r6; |
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| 86 | uint64_t r7; |
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| 87 | uint64_t sp; /* r12 */ |
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| 88 | uint64_t tp; /* r13 */ |
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| 89 | |||
| 90 | /* |
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| 91 | * Branch registers |
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| 92 | */ |
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| 93 | uint64_t pc; /* b0 */ |
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| 94 | uint64_t b1; |
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| 95 | uint64_t b2; |
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| 96 | uint64_t b3; |
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| 97 | uint64_t b4; |
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| 98 | uint64_t b5; |
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| 99 | |||
| 100 | /* |
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| 101 | * Predicate registers |
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| 102 | */ |
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| 103 | uint64_t pr; |
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| 104 | } context_t; |
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| 105 | |||
| 106 | #endif |