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