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 23 section .text:CODE:ROOT 24 25;/**************************************************************************/ 26;/* */ 27;/* FUNCTION RELEASE */ 28;/* */ 29;/* _tx_thread_stack_build RXv2/IAR */ 30;/* 6.1.11 */ 31;/* AUTHOR */ 32;/* */ 33;/* William E. Lamie, Microsoft Corporation */ 34;/* */ 35;/* DESCRIPTION */ 36;/* */ 37;/* This function builds a stack frame on the supplied thread's stack. */ 38;/* The stack frame results in a fake interrupt return to the supplied */ 39;/* function pointer. */ 40;/* */ 41;/* INPUT */ 42;/* */ 43;/* thread_ptr Pointer to thread control blk */ 44;/* function_ptr Pointer to return function */ 45;/* */ 46;/* OUTPUT */ 47;/* */ 48;/* None */ 49;/* */ 50;/* CALLS */ 51;/* */ 52;/* None */ 53;/* */ 54;/* CALLED BY */ 55;/* */ 56;/* _tx_thread_create Create thread service */ 57;/* */ 58;/* RELEASE HISTORY */ 59;/* */ 60;/* DATE NAME DESCRIPTION */ 61;/* */ 62;/* 12-30-2020 William E. Lamie Initial Version 6.1.3 */ 63;/* 10-15-2021 William E. Lamie Modified comment(s), and */ 64;/* removed unnecessary stack */ 65;/* type placement, */ 66;/* resulting in version 6.1.9 */ 67;/* 01-31-2022 William E. Lamie Modified comment(s), */ 68;/* resulting in version 6.1.10 */ 69;/* 04-25-2022 William E. Lamie Modified comment(s), */ 70;/* resulting in version 6.1.11 */ 71;/* */ 72;/**************************************************************************/ 73 public __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; ACC1 82; R6 83; R7 84; R8 85; R9 86; R10 87; R11 88; R12 89; R13 90; FPSW 91; R14 92; R15 93; R3 94; R4 95; R5 96; R1 97; R2 98; PC 99; PSW 100 101; 102; Stack Bottom: (higher memory address) */ 103; 104 MOV.L 16[R1],R3 ; Pickup end of stack area 105 BCLR #0, R3 ; Mask for 4-byte alignment 106 BCLR #1, R3 107; 108; /* Build the stack frame. */ 109; 110 MOV.L #30000h, R4 111 MOV.L R4, [-R3] ; Initial PSW (SVC mode, U flag set) 112 MOV.L R2, [-R3] ; Initial PC 113 MOV.L #0, R4 114 MOV.L R4,[-R3] ; Initial R2 ... 115 MOV.L R4,[-R3] ; Initial R1 ... 116 MOV.L R4,[-R3] ; Initial R5 ... 117 MOV.L R4,[-R3] ; Initial R4 ... 118 MOV.L R4,[-R3] ; Initial R3 ... 119 MOV.L R4,[-R3] ; Initial R15 ... 120 MOV.L R4,[-R3] ; Initial R14 ... 121 MVFC FPSW, r4 122 MOV.L R4, [-R3] ; Initial FPSW 123 MOV.L #0, R4 124 MOV.L R4,[-R3] ; Initial R13 ... 125 MOV.L R4,[-R3] ; Initial R12 ... 126 MOV.L R4,[-R3] ; Initial R11 ... 127 MOV.L R4,[-R3] ; Initial R10 ... 128 MOV.L R4,[-R3] ; Initial R9 ... 129 MOV.L R4,[-R3] ; Initial R8 ... 130 MOV.L R4,[-R3] ; Initial R7 ... 131 MOV.L R4,[-R3] ; Initial R6 ... 132 133 MOV.L R4,[-R3] ; Accumulator 1 134 MOV.L R4,[-R3] 135 MOV.L R4,[-R3] 136 137 MOV.L R4,[-R3] ; Accumulator 0 138 MOV.L R4,[-R3] 139 MOV.L R4,[-R3] 140 141; /* Setup stack pointer. */ 142; thread_ptr -> tx_thread_stack_ptr = R1; 143 MOV.L R3, 8[R1] 144 ; Store initial SP in thread control block 145 RTS 146 147;} 148 149 END 150
