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  1. /*
  2.  * Copyright © <2010>, Intel Corporation.
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the
  6.  * "Software"), to deal in the Software without restriction, including
  7.  * without limitation the rights to use, copy, modify, merge, publish,
  8.  * distribute, sub license, and/or sell copies of the Software, and to
  9.  * permit persons to whom the Software is furnished to do so, subject to
  10.  * the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice (including the
  13.  * next paragraph) shall be included in all copies or substantial portions
  14.  * of the Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  19.  * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  20.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  21.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  22.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * This file was originally licensed under the following license
  25.  *
  26.  *  Licensed under the Apache License, Version 2.0 (the "License");
  27.  *  you may not use this file except in compliance with the License.
  28.  *  You may obtain a copy of the License at
  29.  *
  30.  *      http://www.apache.org/licenses/LICENSE-2.0
  31.  *
  32.  *  Unless required by applicable law or agreed to in writing, software
  33.  *  distributed under the License is distributed on an "AS IS" BASIS,
  34.  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  35.  *  See the License for the specific language governing permissions and
  36.  *  limitations under the License.
  37.  *
  38.  */
  39. //========== Forward message to root thread through gateway ==========
  40. // Each child thread write a byte into the root GRF r50 defiend in open Gataway.
  41.  
  42. #if defined(_DEBUG)
  43. mov             (1)             EntrySignatureC:w                       0x7777:w
  44. #endif
  45.  
  46. // Init payload to r0
  47. mov (8)         GatewayPayload<1>:ud    0:w                                                             //{ NoDDClr }
  48.  
  49. // Forward a message:
  50. // Offset = x relative to r50 (defiend in open gataway), x = ORIX >> 4 [bit 28:16]
  51. // Need to shift left 16
  52.  
  53. // shift 2 more bits for byte to word offset
  54.  
  55. //shl   (1)             Offset_Length:ud                GateWayOffsetC:w                16:w            { NoDDClr, NoDDChk }
  56. shl     (1)             Offset_Length:ud                GateWayOffsetC:w                18:w           
  57.  
  58. // 2 bytes offset
  59. add     (1)             Offset_Length:ud                        Offset_Length:ud                0x00020000:d    { NoDDClr }
  60.        
  61. // Length = 1 byte,     [bit 10:8 = 000]
  62. //000 xxxxxxxxxxxxx 00000 000 00000000 ==> 000x xxxx xxxx xxxx 0000 0000 0000 0000
  63.  
  64. //mov (1)       DispatchID:ub                   r0.20:ub                // Dispatch ID
  65.  
  66. //Move in EUid and Thread ID that we received from the PARENT thread
  67. mov (1)         EUID_TID:uw                     r0.6:uw                                                         { NoDDClr, NoDDChk }
  68.  
  69. mov (1)         GatewayPayloadKey:uw    0x1212:uw                                                       { NoDDClr, NoDDChk }    // Key
  70.  
  71. //mov   (4)             GatewayPayload<1>:ud    0:ud                                                            { NoDDClr, NoDDChk }    // Init payload low 4 dword
  72.  
  73. // Write back one byte (value = 0xFF) to root thread GRF to indicate this child thread is finished
  74. // All lower 4 bytes must be assigned to the same byte value.
  75. mov     (4)             GatewayPayload<1>:ub    0xFFFF:uw                                                       { NoDDChk }
  76.  
  77. // msg descriptor bit 15 set to '1' for notification
  78. #ifdef GW_DCN
  79. // For ILK, EOT bit should also be set to terminate the thread. This is to fix a timing related HW issue.
  80. //
  81. send (8)        null:ud                 m0                      GatewayPayload<8;8,1>:ud    MSG_GW_EOT  FWDMSGDSC+NOTIFYMSG
  82. #else
  83. send (8)        null:ud                 m0                      GatewayPayload<8;8,1>:ud    MSG_GW      FWDMSGDSC+NOTIFYMSG
  84. #endif  // GW_DCN
  85.  
  86. //========== Forward Msg Done ========================================
  87.  
  88.