1;/*************************************************************************** 2; * Copyright (c) 2024 Microsoft Corporation 3; * 4; * This program and the accompanying materials are made available under the 5; * terms of the MIT License which is available at 6; * https://opensource.org/licenses/MIT. 7; * 8; * SPDX-License-Identifier: MIT 9; **************************************************************************/ 10; 11; 12;/**************************************************************************/ 13;/**************************************************************************/ 14;/** */ 15;/** ThreadX Component */ 16;/** */ 17;/** Thread */ 18;/** */ 19;/**************************************************************************/ 20;/**************************************************************************/ 21 22 .text 23;/**************************************************************************/ 24;/* */ 25;/* FUNCTION RELEASE */ 26;/* */ 27;/* _tx_thread_stack_build RXv1/GNURX */ 28;/* 6.1.11 */ 29;/* AUTHOR */ 30;/* */ 31;/* William E. Lamie, Microsoft Corporation */ 32;/* */ 33;/* DESCRIPTION */ 34;/* */ 35;/* This function builds a stack frame on the supplied thread's stack. */ 36;/* The stack frame results in a fake interrupt return to the supplied */ 37;/* function pointer. */ 38;/* */ 39;/* INPUT */ 40;/* */ 41;/* thread_ptr Pointer to thread control blk */ 42;/* function_ptr Pointer to return function */ 43;/* */ 44;/* OUTPUT */ 45;/* */ 46;/* None */ 47;/* */ 48;/* CALLS */ 49;/* */ 50;/* None */ 51;/* */ 52;/* CALLED BY */ 53;/* */ 54;/* _tx_thread_create Create thread service */ 55;/* */ 56;/* RELEASE HISTORY */ 57;/* */ 58;/* DATE NAME DESCRIPTION */ 59;/* */ 60;/* 08-02-2021 William E. Lamie Initial Version 6.1.8 */ 61;/* 10-15-2021 William E. Lamie Modified comment(s), and */ 62;/* removed unnecessary stack */ 63;/* type placement, */ 64;/* resulting in version 6.1.9 */ 65;/* 01-31-2022 William E. Lamie Modified comment(s), */ 66;/* resulting in version 6.1.10 */ 67;/* 04-25-2022 William E. Lamie Modified comment(s), */ 68;/* resulting in version 6.1.11 */ 69;/* */ 70;/**************************************************************************/ 71;VOID _tx_thread_stack_build(TX_THREAD *thread_ptr, VOID (*function_ptr)(VOID)) 72;{ 73 .global __tx_thread_stack_build 74__tx_thread_stack_build: 75; 76; 77; /* Build an interrupt frame. The form of the fake interrupt stack 78; on the Renesas RX should look like the following after it is built: 79; 80; Stack Top: ACC0 81; R6 82; R7 83; R8 84; R9 85; R10 86; R11 87; R12 88; R13 89; FPSW 90; R14 91; R15 92; R3 93; R4 94; R5 95; R1 96; R2 97; PC 98; PSW 99 100; 101; Stack Bottom: (higher memory address) */ 102; 103 MOV.L 16[R1],R3 ; Pickup end of stack area 104 BCLR #0, R3 ; Mask for 4-byte alignment 105 BCLR #1, R3 106; 107; /* Build the stack frame. */ 108; 109 MOV.L #30000h, R4 110 MOV.L R4, [-R3] ; Initial PSW (SVC mode, U flag set) 111 MOV.L R2, [-R3] ; Initial PC 112 MOV.L #0, R4 113 MOV.L R4,[-R3] ; Initial R2 ... 114 MOV.L R4,[-R3] ; Initial R1 ... 115 MOV.L R4,[-R3] ; Initial R5 ... 116 MOV.L R4,[-R3] ; Initial R4 ... 117 MOV.L R4,[-R3] ; Initial R3 ... 118 MOV.L R4,[-R3] ; Initial R15 ... 119 MOV.L R4,[-R3] ; Initial R14 ... 120 MOV.L R4,[-R3] ; Initial R13 ... 121 MOV.L R4,[-R3] ; Initial R12 ... 122 MOV.L R4,[-R3] ; Initial R11 ... 123 MOV.L R4,[-R3] ; Initial R10 ... 124 MOV.L R4,[-R3] ; Initial R9 ... 125 MOV.L R4,[-R3] ; Initial R8 ... 126 MOV.L R4,[-R3] ; Initial R7 ... 127 MOV.L R4,[-R3] ; Initial R6 ... 128 129 MOV.L R4,[-R3] ; Accumulator 0 130 MOV.L R4,[-R3] 131 132; /* Setup stack pointer. */ 133; thread_ptr -> tx_thread_stack_ptr = R1; 134 MOV.L R3, 8[R1] 135 ; Store initial SP in thread control block 136 RTS 137 138;} 139 .end 140
