📄 os_task.lst
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##############################################################################
# #
# IAR ARM ANSI C/C++ Compiler V4.42A/W32 KICKSTART 26/Dec/2008 18:22:04 #
# Copyright 1999-2005 IAR Systems. All rights reserved. #
# #
# Cpu mode = thumb #
# Endian = little #
# Stack alignment = 4 #
# Source file = F:\PROJECT\STM32_UCOSII\uCOS-II\Source\os_task.c #
# Command line = F:\PROJECT\STM32_UCOSII\uCOS-II\Source\os_task.c #
# -lCN F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E- #
# EVAL\IAR\OS-Probe\Flash\List\ -o #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\Flash\Obj\ -z6 --no_unroll --no_inline #
# --no_tbaa --no_scheduling --debug --cpu_mode thumb #
# --endian little --cpu cortex-M3 --stack_align 4 -e #
# --fpu None --dlib_config "E:\Program Files\IAR #
# Systems\Embedded Workbench 4.0 #
# Kickstart\arm\LIB\dl7mptnnl8n.h" -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\ -I F:\PROJECT\STM32_UCOSII\EvalBoards\ #
# ST\STM3210E-EVAL\IAR\OS-Probe\..\BSP\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\CPU\ST\STM32\inc\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uC-CPU\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uC-CPU\ARM-Cortex-M3\IAR #
# \ -I F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E- #
# EVAL\IAR\OS-Probe\..\..\..\..\..\uC-LCD\Source\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uC-LIB\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uCOS-II\Ports\ARM-Cortex #
# -M3\Generic\IAR\ -I F:\PROJECT\STM32_UCOSII\EvalBoar #
# ds\ST\STM3210E-EVAL\IAR\OS-Probe\..\..\..\..\..\uCOS #
# -II\Source\ -I F:\PROJECT\STM32_UCOSII\EvalBoards\ST #
# \STM3210E-EVAL\IAR\OS-Probe\..\..\..\..\..\uC-Probe\ #
# Target\Communication\Generic\RS-232\Source\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Communic #
# ation\Generic\RS-232\Ports\ST\STM32\ -I #
# F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Communic #
# ation\Generic\Source\ -I F:\PROJECT\STM32_UCOSII\Eva #
# lBoards\ST\STM3210E-EVAL\IAR\OS-Probe\..\..\..\..\.. #
# \uC-Probe\Target\Plugins\uCOS-II\ -I "E:\Program #
# Files\IAR Systems\Embedded Workbench 4.0 #
# Kickstart\arm\INC\" #
# List file = F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\Flash\List\os_task.lst #
# Object file = F:\PROJECT\STM32_UCOSII\EvalBoards\ST\STM3210E-EVAL\ #
# IAR\OS-Probe\Flash\Obj\os_task.r79 #
# #
# #
##############################################################################
F:\PROJECT\STM32_UCOSII\uCOS-II\Source\os_task.c
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * TASK MANAGEMENT
6 *
7 * (c) Copyright 1992-2007, Micrium, Weston, FL
8 * All Rights Reserved
9 *
10 * File : OS_TASK.C
11 * By : Jean J. Labrosse
12 * Version : V2.86
13 *
14 * LICENSING TERMS:
15 * ---------------
16 * uC/OS-II is provided in source form for FREE evaluation, for educational use or for peaceful research.
17 * If you plan on using uC/OS-II in a commercial product you need to contact Micri祄 to properly license
18 * its use in your product. We provide ALL the source code for your convenience and to help you experience
19 * uC/OS-II. The fact that the source is provided does NOT mean that you can use it without paying a
20 * licensing fee.
21 *********************************************************************************************************
22 */
23
24 #ifndef OS_MASTER_FILE
25 #include <ucos_ii.h>
26 #endif
27
28 /*$PAGE*/
29 /*
30 *********************************************************************************************************
31 * CHANGE PRIORITY OF A TASK
32 *
33 * Description: This function allows you to change the priority of a task dynamically. Note that the new
34 * priority MUST be available.
35 *
36 * Arguments : oldp is the old priority
37 *
38 * newp is the new priority
39 *
40 * Returns : OS_ERR_NONE is the call was successful
41 * OS_ERR_PRIO_INVALID if the priority you specify is higher that the maximum allowed
42 * (i.e. >= OS_LOWEST_PRIO)
43 * OS_ERR_PRIO_EXIST if the new priority already exist.
44 * OS_ERR_PRIO there is no task with the specified OLD priority (i.e. the OLD task does
45 * not exist.
46 * OS_ERR_TASK_NOT_EXIST if the task is assigned to a Mutex PIP.
47 *********************************************************************************************************
48 */
49
50 #if OS_TASK_CHANGE_PRIO_EN > 0
\ In segment CODE, align 4, keep-with-next
51 INT8U OSTaskChangePrio (INT8U oldprio, INT8U newprio)
52 {
\ OSTaskChangePrio:
\ 00000000 2DE9F04F PUSH {R4-R11,LR}
\ 00000004 85B0 SUB SP,SP,#+20
\ 00000006 8846 MOV R8,R1
\ 00000008 0500 MOVS R5,R0
53 #if (OS_EVENT_EN)
54 OS_EVENT *pevent;
55 #if (OS_EVENT_MULTI_EN > 0)
56 OS_EVENT **pevents;
57 #endif
58 #endif
59 OS_TCB *ptcb;
60 INT8U y_new;
61 INT8U x_new;
62 INT8U y_old;
63 #if OS_LOWEST_PRIO <= 63
64 INT8U bity_new;
65 INT8U bitx_new;
66 INT8U bity_old;
67 INT8U bitx_old;
68 #else
69 INT16U bity_new;
70 INT16U bitx_new;
71 INT16U bity_old;
72 INT16U bitx_old;
73 #endif
74 #if OS_CRITICAL_METHOD == 3
75 OS_CPU_SR cpu_sr = 0; /* Storage for CPU status register */
76 #endif
77
78
79 /*$PAGE*/
80 #if OS_ARG_CHK_EN > 0
81 if (oldprio >= OS_LOWEST_PRIO) {
82 if (oldprio != OS_PRIO_SELF) {
83 return (OS_ERR_PRIO_INVALID);
84 }
85 }
86 if (newprio >= OS_LOWEST_PRIO) {
87 return (OS_ERR_PRIO_INVALID);
88 }
89 #endif
90 OS_ENTER_CRITICAL();
\ 0000000A ........ _BLF OS_CPU_SR_Save,??OS_CPU_SR_Save??rT
\ 0000000E .... LDR.N R1,??DataTable10 ;; OSTCBPrioTbl
\ 00000010 4246 MOV R2,R8
\ 00000012 11EB8204 ADDS R4,R1,R2, LSL #+2
\ 00000016 2268 LDR R2,[R4, #+0]
\ 00000018 002A CMP R2,#+0
\ 0000001A 03D0 BEQ.N ??OSTaskChangePrio_0
91 if (OSTCBPrioTbl[newprio] != (OS_TCB *)0) { /* New priority must not already exist */
92 OS_EXIT_CRITICAL();
\ 0000001C ........ _BLF OS_CPU_SR_Restore,??OS_CPU_SR_Restore??rT
93 return (OS_ERR_PRIO_EXIST);
\ 00000020 2820 MOVS R0,#+40
\ 00000022 A9E0 B.N ??OSTaskChangePrio_1
94 }
95 if (oldprio == OS_PRIO_SELF) { /* See if changing self */
\ ??OSTaskChangePrio_0:
\ 00000024 FF2D CMP R5,#+255
\ 00000026 03D1 BNE.N ??OSTaskChangePrio_2
96 oldprio = OSTCBCur->OSTCBPrio; /* Yes, get priority */
\ 00000028 .... LDR.N R2,??DataTable1 ;; OSTCBCur
\ 0000002A 1268 LDR R2,[R2, #+0]
\ 0000002C 3232 ADDS R2,R2,#+50
\ 0000002E 1578 LDRB R5,[R2, #+0]
\ ??OSTaskChangePrio_2:
\ 00000030 11EB8505 ADDS R5,R1,R5, LSL #+2
\ 00000034 2968 LDR R1,[R5, #+0]
97 }
98 ptcb = OSTCBPrioTbl[oldprio];
99 if (ptcb == (OS_TCB *)0) { /* Does task to change exist? */
\ 00000036 0029 CMP R1,#+0
\ 00000038 03D1 BNE.N ??OSTaskChangePrio_3
100 OS_EXIT_CRITICAL(); /* No, can't change its priority! */
\ 0000003A ........ _BLF OS_CPU_SR_Restore,??OS_CPU_SR_Restore??rT
101 return (OS_ERR_PRIO);
\ 0000003E 2920 MOVS R0,#+41
\ 00000040 9AE0 B.N ??OSTaskChangePrio_1
102 }
103 if (ptcb == OS_TCB_RESERVED) { /* Is task assigned to Mutex */
\ ??OSTaskChangePrio_3:
\ 00000042 0129 CMP R1,#+1
\ 00000044 03D1 BNE.N ??OSTaskChangePrio_4
104 OS_EXIT_CRITICAL(); /* No, can't change its priority! */
\ 00000046 ........ _BLF OS_CPU_SR_Restore,??OS_CPU_SR_Restore??rT
105 return (OS_ERR_TASK_NOT_EXIST);
\ 0000004A 4320 MOVS R0,#+67
\ 0000004C 94E0 B.N ??OSTaskChangePrio_1
106 }
107 #if OS_LOWEST_PRIO <= 63
108 y_new = (INT8U)(newprio >> 3); /* Yes, compute new TCB fields */
\ ??OSTaskChangePrio_4:
\ 0000004E 4246 MOV R2,R8
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