diff options
Diffstat (limited to 'ports/arm11/ac5/src/tx_thread_stack_build.s')
| -rw-r--r-- | ports/arm11/ac5/src/tx_thread_stack_build.s | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/ports/arm11/ac5/src/tx_thread_stack_build.s b/ports/arm11/ac5/src/tx_thread_stack_build.s new file mode 100644 index 00000000..d9b68fa9 --- /dev/null +++ b/ports/arm11/ac5/src/tx_thread_stack_build.s @@ -0,0 +1,156 @@ +;/**************************************************************************/ +;/* */ +;/* Copyright (c) Microsoft Corporation. All rights reserved. */ +;/* */ +;/* This software is licensed under the Microsoft Software License */ +;/* Terms for Microsoft Azure RTOS. Full text of the license can be */ +;/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ +;/* and in the root directory of this software. */ +;/* */ +;/**************************************************************************/ +; +; +;/**************************************************************************/ +;/**************************************************************************/ +;/** */ +;/** ThreadX Component */ +;/** */ +;/** Thread */ +;/** */ +;/**************************************************************************/ +;/**************************************************************************/ +; +; +;#define TX_SOURCE_CODE +; +; +;/* Include necessary system files. */ +; +;#include "tx_api.h" +;#include "tx_thread.h" +; +; +SVC_MODE EQU 0x13 ; SVC mode + IF :DEF:TX_ENABLE_FIQ_SUPPORT +CPSR_MASK EQU 0xDF ; Mask initial CPSR, IRQ & FIQ ints enabled + ELSE +CPSR_MASK EQU 0x9F ; Mask initial CPSR, IRQ ints enabled + ENDIF +; +; + AREA ||.text||, CODE, READONLY +;/**************************************************************************/ +;/* */ +;/* FUNCTION RELEASE */ +;/* */ +;/* _tx_thread_stack_build ARM11/AC5 */ +;/* 6.0.1 */ +;/* AUTHOR */ +;/* */ +;/* William E. Lamie, Microsoft Corporation */ +;/* */ +;/* DESCRIPTION */ +;/* */ +;/* This function builds a stack frame on the supplied thread's stack. */ +;/* The stack frame results in a fake interrupt return to the supplied */ +;/* function pointer. */ +;/* */ +;/* INPUT */ +;/* */ +;/* thread_ptr Pointer to thread control blk */ +;/* function_ptr Pointer to return function */ +;/* */ +;/* OUTPUT */ +;/* */ +;/* None */ +;/* */ +;/* CALLS */ +;/* */ +;/* None */ +;/* */ +;/* CALLED BY */ +;/* */ +;/* _tx_thread_create Create thread service */ +;/* */ +;/* RELEASE HISTORY */ +;/* */ +;/* DATE NAME DESCRIPTION */ +;/* */ +;/* 06-30-2020 William E. Lamie Initial Version 6.0.1 */ +;/* */ +;/**************************************************************************/ +;VOID _tx_thread_stack_build(TX_THREAD *thread_ptr, VOID (*function_ptr)(VOID)) +;{ + EXPORT _tx_thread_stack_build +_tx_thread_stack_build +; +; +; /* Build a fake interrupt frame. The form of the fake interrupt stack +; on the ARM11 should look like the following after it is built: +; +; Stack Top: 1 Interrupt stack frame type +; CPSR Initial value for CPSR +; a1 (r0) Initial value for a1 +; a2 (r1) Initial value for a2 +; a3 (r2) Initial value for a3 +; a4 (r3) Initial value for a4 +; v1 (r4) Initial value for v1 +; v2 (r5) Initial value for v2 +; v3 (r6) Initial value for v3 +; v4 (r7) Initial value for v4 +; v5 (r8) Initial value for v5 +; sb (r9) Initial value for sb +; sl (r10) Initial value for sl +; fp (r11) Initial value for fp +; ip (r12) Initial value for ip +; lr (r14) Initial value for lr +; pc (r15) Initial value for pc +; 0 For stack backtracing +; +; Stack Bottom: (higher memory address) */ +; + LDR r2, [r0, #16] ; Pickup end of stack area + BIC r2, r2, #7 ; Ensure 8-byte alignment + SUB r2, r2, #76 ; Allocate space for the stack frame +; +; /* Actually build the stack frame. */ +; + MOV r3, #1 ; Build interrupt stack type + STR r3, [r2, #0] ; Store stack type + MOV r3, #0 ; Build initial register value + STR r3, [r2, #8] ; Store initial r0 + STR r3, [r2, #12] ; Store initial r1 + STR r3, [r2, #16] ; Store initial r2 + STR r3, [r2, #20] ; Store initial r3 + STR r3, [r2, #24] ; Store initial r4 + STR r3, [r2, #28] ; Store initial r5 + STR r3, [r2, #32] ; Store initial r6 + STR r3, [r2, #36] ; Store initial r7 + STR r3, [r2, #40] ; Store initial r8 + STR r3, [r2, #44] ; Store initial r9 + LDR r3, [r0, #12] ; Pickup stack starting address + STR r3, [r2, #48] ; Store initial r10 (sl) + MOV r3, #0 ; Build initial register value + STR r3, [r2, #52] ; Store initial r11 + STR r3, [r2, #56] ; Store initial r12 + STR r3, [r2, #60] ; Store initial lr + STR r1, [r2, #64] ; Store initial pc + STR r3, [r2, #68] ; 0 for back-trace + MRS r1, CPSR ; Pickup CPSR + BIC r1, r1, #CPSR_MASK ; Mask mode bits of CPSR + ORR r3, r1, #SVC_MODE ; Build CPSR, SVC mode, interrupts enabled + STR r3, [r2, #4] ; Store initial CPSR +; +; /* Setup stack pointer. */ +; thread_ptr -> tx_thread_stack_ptr = r2; +; + STR r2, [r0, #8] ; Save stack pointer in thread's + ; control block + IF {INTER} = {TRUE} + BX lr ; Return to caller + ELSE + MOV pc, lr ; Return to caller + ENDIF +;} + END + |