Moved proj up

2026-06-04 10:21:56 +02:00
parent aea013305e
commit 99fb345151
949 changed files with 0 additions and 0 deletions
@@ -0,0 +1,150 @@
+; /*
+   * ; * FreeRTOS Kernel V11.3.0
+   * ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+   * ; *
+   * ; * SPDX-License-Identifier: MIT
+   * ; *
+   * ; * 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+   * ; * COPYRIGHT HOLDERS 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.
+   * ; *
+   * ; * https://www.FreeRTOS.org
+   * ; * https://github.com/FreeRTOS
+   * ; *
+   * ; */
+EXTERN pxCurrentTCB
+EXTERN ulCriticalNesting
+
+;
+Context save and restore macro definitions
+;
+
+portSAVE_CONTEXT MACRO
+
+;
+Push R0 as we are going to use the register.
+   STMDB SP !, {
+    R0
+}
+
+Set R0 to point to the task stack pointer.
+   STMDB SP, {
+    SP
+}
+^
+NOP
+SUB SP, SP, # 4
+LDMIA SP !, {
+    R0
+}
+
+;
+Push the return address onto the stack.
+          STMDB R0 !, {
+           LR
+       }
+
+       Now we have saved LR we can use it instead of R0.
+          MOV LR, R0
+
+;
+
+Pop R0 so we can save it onto the system mode stack.
+   LDMIA SP !, {
+    R0
+}
+
+Push all the system mode registers onto the task stack.
+   STMDB LR, {
+    R0 - LR
+}
+^
+NOP
+SUB LR, LR, # 60
+
+;
+Push the SPSR onto the task stack.
+   MRS R0, SPSR
+STMDB LR !, {
+    R0
+}
+
+LDR R0, = ulCriticalNesting
+          LDR R0, [ R0 ]
+STMDB LR !, {
+    R0
+}
+
+Store the new top of stack
+
+for the task.
+   LDR R1, = pxCurrentTCB
+             LDR R0, [ R1 ]
+STR LR, [ R0 ]
+
+ENDM
+
+
+portRESTORE_CONTEXT MACRO
+
+;
+Set the LR to the task stack.
+   LDR R1, = pxCurrentTCB
+             LDR R0, [ R1 ]
+LDR LR, [ R0 ]
+
+;
+The critical nesting depth is the first item on the stack.
+   ;
+Load it into the ulCriticalNesting variable.
+   LDR R0, = ulCriticalNesting
+             LDMFD LR !, {
+    R1
+}
+
+STR R1, [ R0 ]
+
+;
+Get the SPSR from the stack.
+   LDMFD LR !, {
+    R0
+}
+MSR SPSR_cxsf, R0
+
+;
+Restore all system mode registers
+
+for the task.
+   LDMFD LR, {
+    R0 - R14
+}
+
+^
+NOP
+
+;
+Restore the return address.
+          LDR LR, [ LR, # + 60 ]
+
+;
+
+And return -correcting the offset in the LR to obtain the
+;
+
+correct address.
+   SUBS PC, LR, # 4
+
+ENDM