sabme ua / mbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.

Dependents:   DISCO-F746NG_rtos_test ecte433

Fork of mbed-rtos by mbed official

rtx/TARGET_CORTEX_M/TARGET_M7/TOOLCHAIN_IAR/HAL_CM3.S@96:8ac966e2cd3f, 2015-11-11 (annotated)

Committer:
mzta
Date:
Wed Nov 11 07:21:20 2015 +0000
Revision:
96:8ac966e2cd3f
Support Cortex-M7 target.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mzta 96:8ac966e2cd3f 1 /*----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 2 * RL-ARM - RTX
mzta 96:8ac966e2cd3f 3 *----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 4 * Name: HAL_CM3.S
mzta 96:8ac966e2cd3f 5 * Purpose: Hardware Abstraction Layer for Cortex-M3
mzta 96:8ac966e2cd3f 6 * Rev.: V4.70
mzta 96:8ac966e2cd3f 7 *----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 8 *
mzta 96:8ac966e2cd3f 9 * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
mzta 96:8ac966e2cd3f 10 * All rights reserved.
mzta 96:8ac966e2cd3f 11 * Redistribution and use in source and binary forms, with or without
mzta 96:8ac966e2cd3f 12 * modification, are permitted provided that the following conditions are met:
mzta 96:8ac966e2cd3f 13 * - Redistributions of source code must retain the above copyright
mzta 96:8ac966e2cd3f 14 * notice, this list of conditions and the following disclaimer.
mzta 96:8ac966e2cd3f 15 * - Redistributions in binary form must reproduce the above copyright
mzta 96:8ac966e2cd3f 16 * notice, this list of conditions and the following disclaimer in the
mzta 96:8ac966e2cd3f 17 * documentation and/or other materials provided with the distribution.
mzta 96:8ac966e2cd3f 18 * - Neither the name of ARM nor the names of its contributors may be used
mzta 96:8ac966e2cd3f 19 * to endorse or promote products derived from this software without
mzta 96:8ac966e2cd3f 20 * specific prior written permission.
mzta 96:8ac966e2cd3f 21 *
mzta 96:8ac966e2cd3f 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mzta 96:8ac966e2cd3f 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mzta 96:8ac966e2cd3f 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mzta 96:8ac966e2cd3f 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mzta 96:8ac966e2cd3f 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mzta 96:8ac966e2cd3f 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mzta 96:8ac966e2cd3f 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mzta 96:8ac966e2cd3f 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mzta 96:8ac966e2cd3f 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mzta 96:8ac966e2cd3f 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mzta 96:8ac966e2cd3f 32 * POSSIBILITY OF SUCH DAMAGE.
mzta 96:8ac966e2cd3f 33 *---------------------------------------------------------------------------*/
mzta 96:8ac966e2cd3f 34
mzta 96:8ac966e2cd3f 35 NAME HAL_CM3.S
mzta 96:8ac966e2cd3f 36
mzta 96:8ac966e2cd3f 37 #define TCB_TSTACK 40
mzta 96:8ac966e2cd3f 38
mzta 96:8ac966e2cd3f 39 EXTERN os_flags
mzta 96:8ac966e2cd3f 40 EXTERN os_tsk
mzta 96:8ac966e2cd3f 41 EXTERN rt_alloc_box
mzta 96:8ac966e2cd3f 42 EXTERN rt_free_box
mzta 96:8ac966e2cd3f 43 EXTERN rt_stk_check
mzta 96:8ac966e2cd3f 44 EXTERN rt_pop_req
mzta 96:8ac966e2cd3f 45 EXTERN rt_systick
mzta 96:8ac966e2cd3f 46 EXTERN os_tick_irqack
mzta 96:8ac966e2cd3f 47 EXTERN SVC_Table
mzta 96:8ac966e2cd3f 48 EXTERN SVC_Count
mzta 96:8ac966e2cd3f 49
mzta 96:8ac966e2cd3f 50 /*----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 51 * Functions
mzta 96:8ac966e2cd3f 52 *---------------------------------------------------------------------------*/
mzta 96:8ac966e2cd3f 53
mzta 96:8ac966e2cd3f 54 SECTION .text:CODE:NOROOT(2)
mzta 96:8ac966e2cd3f 55 THUMB
mzta 96:8ac966e2cd3f 56
mzta 96:8ac966e2cd3f 57 /*--------------------------- rt_set_PSP ------------------------------------*/
mzta 96:8ac966e2cd3f 58
mzta 96:8ac966e2cd3f 59 ; void rt_set_PSP (U32 stack);
mzta 96:8ac966e2cd3f 60
mzta 96:8ac966e2cd3f 61 PUBLIC rt_set_PSP
mzta 96:8ac966e2cd3f 62 rt_set_PSP:
mzta 96:8ac966e2cd3f 63
mzta 96:8ac966e2cd3f 64 MSR PSP,R0
mzta 96:8ac966e2cd3f 65 BX LR
mzta 96:8ac966e2cd3f 66
mzta 96:8ac966e2cd3f 67
mzta 96:8ac966e2cd3f 68 /*--------------------------- rt_get_PSP ------------------------------------*/
mzta 96:8ac966e2cd3f 69
mzta 96:8ac966e2cd3f 70 ; U32 rt_get_PSP (void);
mzta 96:8ac966e2cd3f 71
mzta 96:8ac966e2cd3f 72 PUBLIC rt_get_PSP
mzta 96:8ac966e2cd3f 73 rt_get_PSP:
mzta 96:8ac966e2cd3f 74
mzta 96:8ac966e2cd3f 75 MRS R0,PSP
mzta 96:8ac966e2cd3f 76 BX LR
mzta 96:8ac966e2cd3f 77
mzta 96:8ac966e2cd3f 78
mzta 96:8ac966e2cd3f 79 /*--------------------------- os_set_env ------------------------------------*/
mzta 96:8ac966e2cd3f 80
mzta 96:8ac966e2cd3f 81 ; void os_set_env (void);
mzta 96:8ac966e2cd3f 82 /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
mzta 96:8ac966e2cd3f 83
mzta 96:8ac966e2cd3f 84 PUBLIC os_set_env
mzta 96:8ac966e2cd3f 85 os_set_env:
mzta 96:8ac966e2cd3f 86
mzta 96:8ac966e2cd3f 87 MOV R0,SP /* PSP = MSP */
mzta 96:8ac966e2cd3f 88 MSR PSP,R0
mzta 96:8ac966e2cd3f 89 LDR R0,=os_flags
mzta 96:8ac966e2cd3f 90 LDRB R0,[R0]
mzta 96:8ac966e2cd3f 91 LSLS R0,#31
mzta 96:8ac966e2cd3f 92 ITE NE
mzta 96:8ac966e2cd3f 93 MOVNE R0,#0x02 /* Privileged Thread mode, use PSP */
mzta 96:8ac966e2cd3f 94 MOVEQ R0,#0x03 /* Unprivileged Thread mode, use PSP */
mzta 96:8ac966e2cd3f 95 MSR CONTROL,R0
mzta 96:8ac966e2cd3f 96 BX LR
mzta 96:8ac966e2cd3f 97
mzta 96:8ac966e2cd3f 98
mzta 96:8ac966e2cd3f 99 /*--------------------------- _alloc_box ------------------------------------*/
mzta 96:8ac966e2cd3f 100
mzta 96:8ac966e2cd3f 101 ; void *_alloc_box (void *box_mem);
mzta 96:8ac966e2cd3f 102 /* Function wrapper for Unprivileged/Privileged mode. */
mzta 96:8ac966e2cd3f 103
mzta 96:8ac966e2cd3f 104 PUBLIC _alloc_box
mzta 96:8ac966e2cd3f 105 _alloc_box:
mzta 96:8ac966e2cd3f 106
mzta 96:8ac966e2cd3f 107 LDR R12,=rt_alloc_box
mzta 96:8ac966e2cd3f 108 MRS R3,IPSR
mzta 96:8ac966e2cd3f 109 LSLS R3,#24
mzta 96:8ac966e2cd3f 110 IT NE
mzta 96:8ac966e2cd3f 111 BXNE R12
mzta 96:8ac966e2cd3f 112 MRS R3,CONTROL
mzta 96:8ac966e2cd3f 113 LSLS R3,#31
mzta 96:8ac966e2cd3f 114 IT EQ
mzta 96:8ac966e2cd3f 115 BXEQ R12
mzta 96:8ac966e2cd3f 116 SVC 0
mzta 96:8ac966e2cd3f 117 BX LR
mzta 96:8ac966e2cd3f 118
mzta 96:8ac966e2cd3f 119
mzta 96:8ac966e2cd3f 120 /*--------------------------- _free_box -------------------------------------*/
mzta 96:8ac966e2cd3f 121
mzta 96:8ac966e2cd3f 122 ; int _free_box (void *box_mem, void *box);
mzta 96:8ac966e2cd3f 123 /* Function wrapper for Unprivileged/Privileged mode. */
mzta 96:8ac966e2cd3f 124
mzta 96:8ac966e2cd3f 125 PUBLIC _free_box
mzta 96:8ac966e2cd3f 126 _free_box:
mzta 96:8ac966e2cd3f 127
mzta 96:8ac966e2cd3f 128 LDR R12,=rt_free_box
mzta 96:8ac966e2cd3f 129 MRS R3,IPSR
mzta 96:8ac966e2cd3f 130 LSLS R3,#24
mzta 96:8ac966e2cd3f 131 IT NE
mzta 96:8ac966e2cd3f 132 BXNE R12
mzta 96:8ac966e2cd3f 133 MRS R3,CONTROL
mzta 96:8ac966e2cd3f 134 LSLS R3,#31
mzta 96:8ac966e2cd3f 135 IT EQ
mzta 96:8ac966e2cd3f 136 BXEQ R12
mzta 96:8ac966e2cd3f 137 SVC 0
mzta 96:8ac966e2cd3f 138 BX LR
mzta 96:8ac966e2cd3f 139
mzta 96:8ac966e2cd3f 140
mzta 96:8ac966e2cd3f 141 /*-------------------------- SVC_Handler ------------------------------------*/
mzta 96:8ac966e2cd3f 142
mzta 96:8ac966e2cd3f 143 ; void SVC_Handler (void);
mzta 96:8ac966e2cd3f 144
mzta 96:8ac966e2cd3f 145 PUBLIC SVC_Handler
mzta 96:8ac966e2cd3f 146 SVC_Handler:
mzta 96:8ac966e2cd3f 147
mzta 96:8ac966e2cd3f 148 MRS R0,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 149 LDR R1,[R0,#24] /* Read Saved PC from Stack */
mzta 96:8ac966e2cd3f 150 LDRB R1,[R1,#-2] /* Load SVC Number */
mzta 96:8ac966e2cd3f 151 CBNZ R1,SVC_User
mzta 96:8ac966e2cd3f 152
mzta 96:8ac966e2cd3f 153 LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */
mzta 96:8ac966e2cd3f 154 BLX R12 /* Call SVC Function */
mzta 96:8ac966e2cd3f 155
mzta 96:8ac966e2cd3f 156 MRS R12,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 157 STM R12,{R0-R2} /* Store return values */
mzta 96:8ac966e2cd3f 158
mzta 96:8ac966e2cd3f 159 LDR R3,=os_tsk
mzta 96:8ac966e2cd3f 160 LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */
mzta 96:8ac966e2cd3f 161 CMP R1,R2
mzta 96:8ac966e2cd3f 162 BEQ SVC_Exit /* no task switch */
mzta 96:8ac966e2cd3f 163
mzta 96:8ac966e2cd3f 164 CBZ R1,SVC_Next /* Runtask deleted? */
mzta 96:8ac966e2cd3f 165 STMDB R12!,{R4-R11} /* Save Old context */
mzta 96:8ac966e2cd3f 166 STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */
mzta 96:8ac966e2cd3f 167
mzta 96:8ac966e2cd3f 168 PUSH {R2,R3}
mzta 96:8ac966e2cd3f 169 BL rt_stk_check /* Check for Stack overflow */
mzta 96:8ac966e2cd3f 170 POP {R2,R3}
mzta 96:8ac966e2cd3f 171
mzta 96:8ac966e2cd3f 172 SVC_Next:
mzta 96:8ac966e2cd3f 173 STR R2,[R3] /* os_tsk.run = os_tsk.new */
mzta 96:8ac966e2cd3f 174
mzta 96:8ac966e2cd3f 175 LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */
mzta 96:8ac966e2cd3f 176 LDMIA R12!,{R4-R11} /* Restore New Context */
mzta 96:8ac966e2cd3f 177 MSR PSP,R12 /* Write PSP */
mzta 96:8ac966e2cd3f 178
mzta 96:8ac966e2cd3f 179 SVC_Exit:
mzta 96:8ac966e2cd3f 180 MVN LR,#~0xFFFFFFFD /* set EXC_RETURN value */
mzta 96:8ac966e2cd3f 181 BX LR
mzta 96:8ac966e2cd3f 182
mzta 96:8ac966e2cd3f 183 /*------------------- User SVC ------------------------------*/
mzta 96:8ac966e2cd3f 184
mzta 96:8ac966e2cd3f 185 SVC_User:
mzta 96:8ac966e2cd3f 186 PUSH {R4,LR} /* Save Registers */
mzta 96:8ac966e2cd3f 187 LDR R2,=SVC_Count
mzta 96:8ac966e2cd3f 188 LDR R2,[R2]
mzta 96:8ac966e2cd3f 189 CMP R1,R2
mzta 96:8ac966e2cd3f 190 BHI SVC_Done /* Overflow */
mzta 96:8ac966e2cd3f 191
mzta 96:8ac966e2cd3f 192 LDR R4,=SVC_Table-4
mzta 96:8ac966e2cd3f 193 LDR R4,[R4,R1,LSL #2] /* Load SVC Function Address */
mzta 96:8ac966e2cd3f 194
mzta 96:8ac966e2cd3f 195 LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */
mzta 96:8ac966e2cd3f 196 BLX R4 /* Call SVC Function */
mzta 96:8ac966e2cd3f 197
mzta 96:8ac966e2cd3f 198 MRS R12,PSP
mzta 96:8ac966e2cd3f 199 STM R12,{R0-R3} /* Function return values */
mzta 96:8ac966e2cd3f 200 SVC_Done:
mzta 96:8ac966e2cd3f 201 POP {R4,PC} /* RETI */
mzta 96:8ac966e2cd3f 202
mzta 96:8ac966e2cd3f 203
mzta 96:8ac966e2cd3f 204 /*-------------------------- PendSV_Handler ---------------------------------*/
mzta 96:8ac966e2cd3f 205
mzta 96:8ac966e2cd3f 206 ; void PendSV_Handler (void);
mzta 96:8ac966e2cd3f 207
mzta 96:8ac966e2cd3f 208 PUBLIC PendSV_Handler
mzta 96:8ac966e2cd3f 209 PendSV_Handler:
mzta 96:8ac966e2cd3f 210
mzta 96:8ac966e2cd3f 211 BL rt_pop_req
mzta 96:8ac966e2cd3f 212
mzta 96:8ac966e2cd3f 213 Sys_Switch:
mzta 96:8ac966e2cd3f 214 LDR R3,=os_tsk
mzta 96:8ac966e2cd3f 215 LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */
mzta 96:8ac966e2cd3f 216 CMP R1,R2
mzta 96:8ac966e2cd3f 217 BEQ Sys_Exit
mzta 96:8ac966e2cd3f 218
mzta 96:8ac966e2cd3f 219 MRS R12,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 220 STMDB R12!,{R4-R11} /* Save Old context */
mzta 96:8ac966e2cd3f 221 STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */
mzta 96:8ac966e2cd3f 222
mzta 96:8ac966e2cd3f 223 PUSH {R2,R3}
mzta 96:8ac966e2cd3f 224 BL rt_stk_check /* Check for Stack overflow */
mzta 96:8ac966e2cd3f 225 POP {R2,R3}
mzta 96:8ac966e2cd3f 226
mzta 96:8ac966e2cd3f 227 STR R2,[R3] /* os_tsk.run = os_tsk.new */
mzta 96:8ac966e2cd3f 228
mzta 96:8ac966e2cd3f 229 LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */
mzta 96:8ac966e2cd3f 230 LDMIA R12!,{R4-R11} /* Restore New Context */
mzta 96:8ac966e2cd3f 231 MSR PSP,R12 /* Write PSP */
mzta 96:8ac966e2cd3f 232
mzta 96:8ac966e2cd3f 233 Sys_Exit:
mzta 96:8ac966e2cd3f 234 MVN LR,#~0xFFFFFFFD /* set EXC_RETURN value */
mzta 96:8ac966e2cd3f 235 BX LR /* Return to Thread Mode */
mzta 96:8ac966e2cd3f 236
mzta 96:8ac966e2cd3f 237
mzta 96:8ac966e2cd3f 238 /*-------------------------- SysTick_Handler --------------------------------*/
mzta 96:8ac966e2cd3f 239
mzta 96:8ac966e2cd3f 240 ; void SysTick_Handler (void);
mzta 96:8ac966e2cd3f 241
mzta 96:8ac966e2cd3f 242 PUBLIC SysTick_Handler
mzta 96:8ac966e2cd3f 243 SysTick_Handler:
mzta 96:8ac966e2cd3f 244
mzta 96:8ac966e2cd3f 245 BL rt_systick
mzta 96:8ac966e2cd3f 246 B Sys_Switch
mzta 96:8ac966e2cd3f 247
mzta 96:8ac966e2cd3f 248
mzta 96:8ac966e2cd3f 249 /*-------------------------- OS_Tick_Handler --------------------------------*/
mzta 96:8ac966e2cd3f 250
mzta 96:8ac966e2cd3f 251 ; void OS_Tick_Handler (void);
mzta 96:8ac966e2cd3f 252
mzta 96:8ac966e2cd3f 253 PUBLIC OS_Tick_Handler
mzta 96:8ac966e2cd3f 254 OS_Tick_Handler:
mzta 96:8ac966e2cd3f 255
mzta 96:8ac966e2cd3f 256 BL os_tick_irqack
mzta 96:8ac966e2cd3f 257 BL rt_systick
mzta 96:8ac966e2cd3f 258 B Sys_Switch
mzta 96:8ac966e2cd3f 259
mzta 96:8ac966e2cd3f 260
mzta 96:8ac966e2cd3f 261 END
mzta 96:8ac966e2cd3f 262
mzta 96:8ac966e2cd3f 263 /*----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 264 * end of file
mzta 96:8ac966e2cd3f 265 *---------------------------------------------------------------------------*/