📄 os_task.lst
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##############################################################################
# #
# IAR ARM ANSI C/C++ Compiler V4.40A/W32 EVALUATION 21/Jul/2006 22:36:57 #
# Copyright 1999-2005 IAR Systems. All rights reserved. #
# Time limited license: 21 days left #
# #
# Cpu mode = interwork #
# Endian = little #
# Stack alignment = 4 #
# Source file = E:\Project\ucos-ii\pwm\uCOS-II\os_task.c #
# Command line = E:\Project\ucos-ii\pwm\uCOS-II\os_task.c -lCN #
# E:\Project\ucos-ii\pwm\Debug\List\ -lA #
# E:\Project\ucos-ii\pwm\Debug\List\ -o #
# E:\Project\ucos-ii\pwm\Debug\Obj\ -z3 --no_cse #
# --no_unroll --no_inline --no_code_motion --no_tbaa #
# --no_clustering --no_scheduling --debug --cpu_mode #
# thumb --endian little --cpu ARM7TDMI-S #
# --stack_align 4 --interwork -e --fpu None #
# --dlib_config "E:\Program Files\IAR #
# Systems\Embedded Workbench 4.0 #
# Evaluation\ARM\LIB\dl4tptinl8n.h" -I #
# E:\Project\ucos-ii\pwm\ -I #
# E:\Project\ucos-ii\pwm\App\ -I #
# E:\Project\ucos-ii\pwm\ARM\ -I #
# E:\Project\ucos-ii\pwm\BSP\ -I #
# E:\Project\ucos-ii\pwm\uCOS-II\ -I "E:\Program #
# Files\IAR Systems\Embedded Workbench 4.0 #
# Evaluation\ARM\INC\" #
# List file = E:\Project\ucos-ii\pwm\Debug\List\os_task.lst #
# Object file = E:\Project\ucos-ii\pwm\Debug\Obj\os_task.r79 #
# #
# #
##############################################################################
E:\Project\ucos-ii\pwm\uCOS-II\os_task.c
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * TASK MANAGEMENT
6 *
7 * (c) Copyright 1992-2003, Jean J. Labrosse, Weston, FL
8 * All Rights Reserved
9 *
10 * File : OS_TASK.C
11 * By : Jean J. Labrosse
12 *********************************************************************************************************
13 */
14
15 #ifndef OS_MASTER_FILE
16 #include <ucos_ii.h>
17 #endif
18
19 /*
20 *********************************************************************************************************
21 * CHANGE PRIORITY OF A TASK
22 *
23 * Description: This function allows you to change the priority of a task dynamically. Note that the new
24 * priority MUST be available.
25 *
26 * Arguments : oldp is the old priority
27 *
28 * newp is the new priority
29 *
30 * Returns : OS_NO_ERR is the call was successful
31 * OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
32 * (i.e. >= OS_LOWEST_PRIO)
33 * OS_PRIO_EXIST if the new priority already exist.
34 * OS_PRIO_ERR there is no task with the specified OLD priority (i.e. the OLD task does
35 * not exist.
36 *********************************************************************************************************
37 */
38
39 #if OS_TASK_CHANGE_PRIO_EN > 0
\ In segment CODE, align 4, keep-with-next
40 INT8U OSTaskChangePrio (INT8U oldprio, INT8U newprio)
41 {
\ OSTaskChangePrio:
\ 00000000 F0B5 PUSH {R4-R7,LR}
\ 00000002 81B0 SUB SP,SP,#+4
\ 00000004 0400 MOVS R4,R0
\ 00000006 0D00 MOVS R5,R1
42 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
43 OS_CPU_SR cpu_sr;
44 #endif
45
46 #if OS_EVENT_EN > 0
47 OS_EVENT *pevent;
48 #endif
49
50 OS_TCB *ptcb;
51 INT8U x;
52 INT8U y;
53 INT8U bitx;
54 INT8U bity;
55 INT8U y_old;
56
57
58 #if OS_ARG_CHK_EN > 0
59 if (oldprio >= OS_LOWEST_PRIO) {
\ 00000008 3F2C CMP R4,#+63
\ 0000000A 03D3 BCC ??OSTaskChangePrio_0
60 if (oldprio != OS_PRIO_SELF) {
\ 0000000C FF2C CMP R4,#+255
\ 0000000E 01D0 BEQ ??OSTaskChangePrio_0
61 return (OS_PRIO_INVALID);
\ 00000010 2A20 MOVS R0,#+42
\ 00000012 B3E0 B ??OSTaskChangePrio_1
62 }
63 }
64 if (newprio >= OS_LOWEST_PRIO) {
\ ??OSTaskChangePrio_0:
\ 00000014 3F2D CMP R5,#+63
\ 00000016 01D3 BCC ??OSTaskChangePrio_2
65 return (OS_PRIO_INVALID);
\ 00000018 2A20 MOVS R0,#+42
\ 0000001A AFE0 B ??OSTaskChangePrio_1
66 }
67 #endif
68 OS_ENTER_CRITICAL();
\ ??OSTaskChangePrio_2:
\ 0000001C ........ _BLF OS_CPU_SR_Save,??OS_CPU_SR_Save??rT
69 if (OSTCBPrioTbl[newprio] != (OS_TCB *)0) { /* New priority must not already exist */
\ 00000020 2D06 LSLS R5,R5,#+24 ;; ZeroExtS R5,R5,#+24,#+24
\ 00000022 2D0E LSRS R5,R5,#+24
\ 00000024 0421 MOVS R1,#+4
\ 00000026 6943 MULS R1,R5,R1
\ 00000028 .... LDR R2,??DataTable26 ;; OSTCBPrioTbl
\ 0000002A 5158 LDR R1,[R2, R1]
\ 0000002C 0029 CMP R1,#+0
\ 0000002E 03D0 BEQ ??OSTaskChangePrio_3
70 OS_EXIT_CRITICAL();
\ 00000030 ........ _BLF OS_CPU_SR_Restore,??OS_CPU_SR_Restore??rT
71 return (OS_PRIO_EXIST);
\ 00000034 2820 MOVS R0,#+40
\ 00000036 A1E0 B ??OSTaskChangePrio_1
72 }
73 if (oldprio == OS_PRIO_SELF) { /* See if changing self */
\ ??OSTaskChangePrio_3:
\ 00000038 FF2C CMP R4,#+255
\ 0000003A 03D1 BNE ??OSTaskChangePrio_4
74 oldprio = OSTCBCur->OSTCBPrio; /* Yes, get priority */
\ 0000003C .... LDR R1,??DataTable1 ;; OSTCBCur
\ 0000003E 0968 LDR R1,[R1, #+0]
\ 00000040 2D31 ADDS R1,R1,#+45
\ 00000042 0C78 LDRB R4,[R1, #+0]
75 }
76 ptcb = OSTCBPrioTbl[oldprio];
\ ??OSTaskChangePrio_4:
\ 00000044 2406 LSLS R4,R4,#+24 ;; ZeroExtS R4,R4,#+24,#+24
\ 00000046 240E LSRS R4,R4,#+24
\ 00000048 0421 MOVS R1,#+4
\ 0000004A 6143 MULS R1,R4,R1
\ 0000004C .... LDR R2,??DataTable26 ;; OSTCBPrioTbl
\ 0000004E 5158 LDR R1,[R2, R1]
77 if (ptcb == (OS_TCB *)0) { /* Does task to change exist? */
\ 00000050 0029 CMP R1,#+0
\ 00000052 03D1 BNE ??OSTaskChangePrio_5
78 OS_EXIT_CRITICAL(); /* No, can't change its priority! */
\ 00000054 ........ _BLF OS_CPU_SR_Restore,??OS_CPU_SR_Restore??rT
79 return (OS_PRIO_ERR);
\ 00000058 2920 MOVS R0,#+41
\ 0000005A 8FE0 B ??OSTaskChangePrio_1
80 }
81 y = newprio >> 3; /* Yes, compute new TCB fields */
\ ??OSTaskChangePrio_5:
\ 0000005C 2A00 MOVS R2,R5
\ 0000005E 1206 LSLS R2,R2,#+24 ;; ZeroExtS R2,R2,#+24,#+24
\ 00000060 120E LSRS R2,R2,#+24
\ 00000062 D208 LSRS R2,R2,#+3
82 bity = OSMapTbl[y];
\ 00000064 6B46 MOV R3,SP
\ 00000066 1206 LSLS R2,R2,#+24 ;; ZeroExtS R2,R2,#+24,#+24
\ 00000068 120E LSRS R2,R2,#+24
\ 0000006A 464E LDR R6,??OSTaskChangePrio_6 ;; OSMapTbl
\ 0000006C B65C LDRB R6,[R6, R2]
\ 0000006E 5E70 STRB R6,[R3, #+1]
83 x = newprio & 0x07;
\ 00000070 6B46 MOV R3,SP
\ 00000072 6E07 LSLS R6,R5,#+29 ;; ZeroExtS R6,R5,#+29,#+29
\ 00000074 760F LSRS R6,R6,#+29
\ 00000076 9E70 STRB R6,[R3, #+2]
84 bitx = OSMapTbl[x];
\ 00000078 6B46 MOV R3,SP
\ 0000007A 6E46 MOV R6,SP
\ 0000007C B678 LDRB R6,[R6, #+2]
\ 0000007E 414F LDR R7,??OSTaskChangePrio_6 ;; OSMapTbl
\ 00000080 BE5D LDRB R6,[R7, R6]
\ 00000082 1E70 STRB R6,[R3, #+0]
85 OSTCBPrioTbl[oldprio] = (OS_TCB *)0; /* Remove TCB from old priority */
\ 00000084 0423 MOVS R3,#+4
\ 00000086 5C43 MULS R4,R3,R4
\ 00000088 .... LDR R3,??DataTable26 ;; OSTCBPrioTbl
\ 0000008A 0026 MOVS R6,#+0
\ 0000008C 1E51 STR R6,[R3, R4]
86 OSTCBPrioTbl[newprio] = ptcb; /* Place pointer to TCB @ new priority */
\ 0000008E 2D06 LSLS R5,R5,#+24 ;; ZeroExtS R5,R5,#+24,#+24
\ 00000090 2D0E LSRS R5,R5,#+24
\ 00000092 0423 MOVS R3,#+4
\ 00000094 6B43 MULS R3,R5,R3
\ 00000096 .... LDR R4,??DataTable26 ;; OSTCBPrioTbl
\ 00000098 E150 STR R1,[R4, R3]
87 y_old = ptcb->OSTCBY;
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