diff options
Diffstat (limited to 'ports/arm11/ac5/src/tx_thread_context_save.s')
| -rw-r--r-- | ports/arm11/ac5/src/tx_thread_context_save.s | 80 |
1 files changed, 37 insertions, 43 deletions
diff --git a/ports/arm11/ac5/src/tx_thread_context_save.s b/ports/arm11/ac5/src/tx_thread_context_save.s index 8c92eeb1..aa99af37 100644 --- a/ports/arm11/ac5/src/tx_thread_context_save.s +++ b/ports/arm11/ac5/src/tx_thread_context_save.s @@ -1,18 +1,18 @@ ;/*************************************************************************** -; * Copyright (c) 2024 Microsoft Corporation -; * +; * Copyright (c) 2024 Microsoft Corporation +; * ; * This program and the accompanying materials are made available under the ; * terms of the MIT License which is available at ; * https://opensource.org/licenses/MIT. -; * +; * ; * SPDX-License-Identifier: MIT ; **************************************************************************/ ; ; ;/**************************************************************************/ ;/**************************************************************************/ -;/** */ -;/** ThreadX Component */ +;/** */ +;/** ThreadX Component */ ;/** */ ;/** Thread */ ;/** */ @@ -45,43 +45,37 @@ DISABLE_INTS EQU 0x80 ; IRQ interrupts disabled ; AREA ||.text||, CODE, READONLY PRESERVE8 -;/**************************************************************************/ -;/* */ -;/* FUNCTION RELEASE */ -;/* */ -;/* _tx_thread_context_save ARM11/AC5 */ +;/**************************************************************************/ +;/* */ +;/* FUNCTION RELEASE */ +;/* */ +;/* _tx_thread_context_save ARM11/AC5 */ ;/* 6.1 */ ;/* AUTHOR */ ;/* */ ;/* William E. Lamie, Microsoft Corporation */ ;/* */ ;/* DESCRIPTION */ -;/* */ -;/* This function saves the context of an executing thread in the */ -;/* beginning of interrupt processing. The function also ensures that */ -;/* the system stack is used upon return to the calling ISR. */ -;/* */ -;/* INPUT */ -;/* */ -;/* None */ -;/* */ -;/* OUTPUT */ -;/* */ -;/* None */ -;/* */ -;/* CALLS */ -;/* */ -;/* None */ -;/* */ -;/* CALLED BY */ -;/* */ -;/* ISRs */ -;/* */ -;/* RELEASE HISTORY */ -;/* */ -;/* DATE NAME DESCRIPTION */ ;/* */ -;/* 09-30-2020 William E. Lamie Initial Version 6.1 */ +;/* This function saves the context of an executing thread in the */ +;/* beginning of interrupt processing. The function also ensures that */ +;/* the system stack is used upon return to the calling ISR. */ +;/* */ +;/* INPUT */ +;/* */ +;/* None */ +;/* */ +;/* OUTPUT */ +;/* */ +;/* None */ +;/* */ +;/* CALLS */ +;/* */ +;/* None */ +;/* */ +;/* CALLED BY */ +;/* */ +;/* ISRs */ ;/* */ ;/**************************************************************************/ ;VOID _tx_thread_context_save(VOID) @@ -96,7 +90,7 @@ _tx_thread_context_save ; if (_tx_thread_system_state++) ; { ; - STMDB sp!, {r0-r3} ; Save some working registers + STMDB sp!, {r0-r3} ; Save some working registers IF :DEF:TX_ENABLE_FIQ_SUPPORT MRS r0, CPSR ; Pickup the CPSR ORR r0, r0, #DISABLE_INTS ; Build disable interrupt CPSR @@ -116,7 +110,7 @@ _tx_thread_context_save ; calling ISR. */ ; MRS r0, SPSR ; Pickup saved SPSR - SUB lr, lr, #4 ; Adjust point of interrupt + SUB lr, lr, #4 ; Adjust point of interrupt STMDB sp!, {r0, r10, r12, lr} ; Store other registers ; ; /* Return to the ISR. */ @@ -132,7 +126,7 @@ _tx_thread_context_save POP {lr} ; Recover ISR lr ENDIF - B __tx_irq_processing_return ; Continue IRQ processing + B __tx_irq_processing_return ; Continue IRQ processing ; __tx_thread_not_nested_save ; } @@ -146,13 +140,13 @@ __tx_thread_not_nested_save LDR r1, =_tx_thread_current_ptr ; Pickup address of current thread ptr LDR r0, [r1, #0] ; Pickup current thread pointer CMP r0, #0 ; Is it NULL? - BEQ __tx_thread_idle_system_save ; If so, interrupt occurred in + BEQ __tx_thread_idle_system_save ; If so, interrupt occurred in ; scheduling loop - nothing needs saving! ; ; /* Save minimal context of interrupted thread. */ ; MRS r2, SPSR ; Pickup saved SPSR - SUB lr, lr, #4 ; Adjust point of interrupt + SUB lr, lr, #4 ; Adjust point of interrupt STMDB sp!, {r2, r10, r12, lr} ; Store other registers ; ; /* Save the current stack pointer in the thread's control block. */ @@ -172,7 +166,7 @@ __tx_thread_not_nested_save POP {lr} ; Recover ISR lr ENDIF - B __tx_irq_processing_return ; Continue IRQ processing + B __tx_irq_processing_return ; Continue IRQ processing ; ; } ; else @@ -182,7 +176,7 @@ __tx_thread_idle_system_save ; ; /* Interrupt occurred in the scheduling loop. */ ; -; /* Not much to do here, just adjust the stack pointer, and return to IRQ +; /* Not much to do here, just adjust the stack pointer, and return to IRQ ; processing. */ ; MOV r10, #0 ; Clear stack limit @@ -197,7 +191,7 @@ __tx_thread_idle_system_save ENDIF ADD sp, sp, #16 ; Recover saved registers - B __tx_irq_processing_return ; Continue IRQ processing + B __tx_irq_processing_return ; Continue IRQ processing ; ; } ;} |