uspace/libc/arch/ia64/include/psthread.h

   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_PSTHREAD_H_
  36 #define LIBC_ia64_PSTHREAD_H_
  37
  38 #include <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 #define PSTHREAD_INITIAL_STACK_PAGES_NO 2
  52 /* Stack is divided into two equal parts (for memory stack and register stack). */
  53 #define PSTHREAD_INITIAL_STACK_DIVISION 2
  54
  55 #ifdef context_set
  56 #undef context_set
  57 #endif
  58
  59 #define context_set(c, _pc, stack, size, tls)                                                           \
  60         do {                                                                                            \
  61                 (c)->pc = (uint64_t) _pc;                                                               \
  62                 (c)->bsp = ((uint64_t) stack) + size / PSTHREAD_INITIAL_STACK_DIVISION;                                                         \
  63                 (c)->ar_pfs &= PFM_MASK;                                                                \
  64                 (c)->sp = ((uint64_t) stack) + ALIGN_UP((size / PSTHREAD_INITIAL_STACK_DIVISION), STACK_ALIGNMENT) - SP_DELTA;          \
  65                 (c)->tp = (uint64_t) tls;                                                               \
  66         } while (0);
  67
  68
  69 /*
  70  * Only save registers that must be preserved across
  71  * function calls.
  72  */
  73 typedef struct context {
  74
  75         /*
  76          * Application registers
  77          */
  78         uint64_t ar_pfs;
  79         uint64_t ar_unat_caller;
  80         uint64_t ar_unat_callee;
  81         uint64_t ar_rsc;
  82         uint64_t bsp;           /* ar_bsp */
  83         uint64_t ar_rnat;
  84         uint64_t ar_lc;
  85
  86         /*
  87          * General registers
  88          */
  89         uint64_t r1;
  90         uint64_t r4;
  91         uint64_t r5;
  92         uint64_t r6;
  93         uint64_t r7;
  94         uint64_t sp;            /* r12 */
  95         uint64_t tp;            /* r13 */
  96
  97         /*
  98          * Branch registers
  99          */
 100         uint64_t pc;            /* b0 */
 101         uint64_t b1;
 102         uint64_t b2;
 103         uint64_t b3;
 104         uint64_t b4;
 105         uint64_t b5;
 106
 107         /*
 108          * Predicate registers
 109          */
 110         uint64_t pr;
 111
 112         __r128 f2 __attribute__ ((aligned(16)));
 113         __r128 f3;
 114         __r128 f4;
 115         __r128 f5;
 116
 117         __r128 f16;
 118         __r128 f17;
 119         __r128 f18;
 120         __r128 f19;
 121         __r128 f20;
 122         __r128 f21;
 123         __r128 f22;
 124         __r128 f23;
 125         __r128 f24;
 126         __r128 f25;
 127         __r128 f26;
 128         __r128 f27;
 129         __r128 f28;
 130         __r128 f29;
 131         __r128 f30;
 132         __r128 f31;
 133
 134 } context_t;
 135
 136 #endif
 137
 138 /** @}
 139  */