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_GCC/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.: V4.60
mzta 96:8ac966e2cd3f 7 *----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 8 *
mzta 96:8ac966e2cd3f 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 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 .file "HAL_CM3.S"
mzta 96:8ac966e2cd3f 36 .syntax unified
mzta 96:8ac966e2cd3f 37
mzta 96:8ac966e2cd3f 38 .equ TCB_TSTACK, 40
mzta 96:8ac966e2cd3f 39
mzta 96:8ac966e2cd3f 40
mzta 96:8ac966e2cd3f 41 /*----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 42 * Functions
mzta 96:8ac966e2cd3f 43 *---------------------------------------------------------------------------*/
mzta 96:8ac966e2cd3f 44
mzta 96:8ac966e2cd3f 45 .thumb
mzta 96:8ac966e2cd3f 46
mzta 96:8ac966e2cd3f 47 .section ".text"
mzta 96:8ac966e2cd3f 48 .align 2
mzta 96:8ac966e2cd3f 49
mzta 96:8ac966e2cd3f 50
mzta 96:8ac966e2cd3f 51 /*--------------------------- rt_set_PSP ------------------------------------*/
mzta 96:8ac966e2cd3f 52
mzta 96:8ac966e2cd3f 53 # void rt_set_PSP (U32 stack);
mzta 96:8ac966e2cd3f 54
mzta 96:8ac966e2cd3f 55 .thumb_func
mzta 96:8ac966e2cd3f 56 .type rt_set_PSP, %function
mzta 96:8ac966e2cd3f 57 .global rt_set_PSP
mzta 96:8ac966e2cd3f 58 rt_set_PSP:
mzta 96:8ac966e2cd3f 59 .fnstart
mzta 96:8ac966e2cd3f 60 .cantunwind
mzta 96:8ac966e2cd3f 61
mzta 96:8ac966e2cd3f 62 MSR PSP,R0
mzta 96:8ac966e2cd3f 63 BX LR
mzta 96:8ac966e2cd3f 64
mzta 96:8ac966e2cd3f 65 .fnend
mzta 96:8ac966e2cd3f 66 .size rt_set_PSP, .-rt_set_PSP
mzta 96:8ac966e2cd3f 67
mzta 96:8ac966e2cd3f 68
mzta 96:8ac966e2cd3f 69 /*--------------------------- rt_get_PSP ------------------------------------*/
mzta 96:8ac966e2cd3f 70
mzta 96:8ac966e2cd3f 71 # U32 rt_get_PSP (void);
mzta 96:8ac966e2cd3f 72
mzta 96:8ac966e2cd3f 73 .thumb_func
mzta 96:8ac966e2cd3f 74 .type rt_get_PSP, %function
mzta 96:8ac966e2cd3f 75 .global rt_get_PSP
mzta 96:8ac966e2cd3f 76 rt_get_PSP:
mzta 96:8ac966e2cd3f 77 .fnstart
mzta 96:8ac966e2cd3f 78 .cantunwind
mzta 96:8ac966e2cd3f 79
mzta 96:8ac966e2cd3f 80 MRS R0,PSP
mzta 96:8ac966e2cd3f 81 BX LR
mzta 96:8ac966e2cd3f 82
mzta 96:8ac966e2cd3f 83 .fnend
mzta 96:8ac966e2cd3f 84 .size rt_get_PSP, .-rt_get_PSP
mzta 96:8ac966e2cd3f 85
mzta 96:8ac966e2cd3f 86
mzta 96:8ac966e2cd3f 87 /*--------------------------- os_set_env ------------------------------------*/
mzta 96:8ac966e2cd3f 88
mzta 96:8ac966e2cd3f 89 # void os_set_env (void);
mzta 96:8ac966e2cd3f 90 /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
mzta 96:8ac966e2cd3f 91
mzta 96:8ac966e2cd3f 92 .thumb_func
mzta 96:8ac966e2cd3f 93 .type os_set_env, %function
mzta 96:8ac966e2cd3f 94 .global os_set_env
mzta 96:8ac966e2cd3f 95 os_set_env:
mzta 96:8ac966e2cd3f 96 .fnstart
mzta 96:8ac966e2cd3f 97 .cantunwind
mzta 96:8ac966e2cd3f 98
mzta 96:8ac966e2cd3f 99 MOV R0,SP /* PSP = MSP */
mzta 96:8ac966e2cd3f 100 MSR PSP,R0
mzta 96:8ac966e2cd3f 101 LDR R0,=os_flags
mzta 96:8ac966e2cd3f 102 LDRB R0,[R0]
mzta 96:8ac966e2cd3f 103 LSLS R0,#31
mzta 96:8ac966e2cd3f 104 ITE NE
mzta 96:8ac966e2cd3f 105 MOVNE R0,#0x02 /* Privileged Thread mode, use PSP */
mzta 96:8ac966e2cd3f 106 MOVEQ R0,#0x03 /* Unprivileged Thread mode, use PSP */
mzta 96:8ac966e2cd3f 107 MSR CONTROL,R0
mzta 96:8ac966e2cd3f 108 BX LR
mzta 96:8ac966e2cd3f 109
mzta 96:8ac966e2cd3f 110 .fnend
mzta 96:8ac966e2cd3f 111 .size os_set_env, .-os_set_env
mzta 96:8ac966e2cd3f 112
mzta 96:8ac966e2cd3f 113
mzta 96:8ac966e2cd3f 114 /*--------------------------- _alloc_box ------------------------------------*/
mzta 96:8ac966e2cd3f 115
mzta 96:8ac966e2cd3f 116 # void *_alloc_box (void *box_mem);
mzta 96:8ac966e2cd3f 117 /* Function wrapper for Unprivileged/Privileged mode. */
mzta 96:8ac966e2cd3f 118
mzta 96:8ac966e2cd3f 119 .thumb_func
mzta 96:8ac966e2cd3f 120 .type _alloc_box, %function
mzta 96:8ac966e2cd3f 121 .global _alloc_box
mzta 96:8ac966e2cd3f 122 _alloc_box:
mzta 96:8ac966e2cd3f 123 .fnstart
mzta 96:8ac966e2cd3f 124 .cantunwind
mzta 96:8ac966e2cd3f 125
mzta 96:8ac966e2cd3f 126 LDR R12,=rt_alloc_box
mzta 96:8ac966e2cd3f 127 MRS R3,IPSR
mzta 96:8ac966e2cd3f 128 LSLS R3,#24
mzta 96:8ac966e2cd3f 129 IT NE
mzta 96:8ac966e2cd3f 130 BXNE R12
mzta 96:8ac966e2cd3f 131 MRS R3,CONTROL
mzta 96:8ac966e2cd3f 132 LSLS R3,#31
mzta 96:8ac966e2cd3f 133 IT EQ
mzta 96:8ac966e2cd3f 134 BXEQ R12
mzta 96:8ac966e2cd3f 135 SVC 0
mzta 96:8ac966e2cd3f 136 BX LR
mzta 96:8ac966e2cd3f 137
mzta 96:8ac966e2cd3f 138 .fnend
mzta 96:8ac966e2cd3f 139 .size _alloc_box, .-_alloc_box
mzta 96:8ac966e2cd3f 140
mzta 96:8ac966e2cd3f 141
mzta 96:8ac966e2cd3f 142 /*--------------------------- _free_box -------------------------------------*/
mzta 96:8ac966e2cd3f 143
mzta 96:8ac966e2cd3f 144 # int _free_box (void *box_mem, void *box);
mzta 96:8ac966e2cd3f 145 /* Function wrapper for Unprivileged/Privileged mode. */
mzta 96:8ac966e2cd3f 146
mzta 96:8ac966e2cd3f 147 .thumb_func
mzta 96:8ac966e2cd3f 148 .type _free_box, %function
mzta 96:8ac966e2cd3f 149 .global _free_box
mzta 96:8ac966e2cd3f 150 _free_box:
mzta 96:8ac966e2cd3f 151 .fnstart
mzta 96:8ac966e2cd3f 152 .cantunwind
mzta 96:8ac966e2cd3f 153
mzta 96:8ac966e2cd3f 154 LDR R12,=rt_free_box
mzta 96:8ac966e2cd3f 155 MRS R3,IPSR
mzta 96:8ac966e2cd3f 156 LSLS R3,#24
mzta 96:8ac966e2cd3f 157 IT NE
mzta 96:8ac966e2cd3f 158 BXNE R12
mzta 96:8ac966e2cd3f 159 MRS R3,CONTROL
mzta 96:8ac966e2cd3f 160 LSLS R3,#31
mzta 96:8ac966e2cd3f 161 IT EQ
mzta 96:8ac966e2cd3f 162 BXEQ R12
mzta 96:8ac966e2cd3f 163 SVC 0
mzta 96:8ac966e2cd3f 164 BX LR
mzta 96:8ac966e2cd3f 165
mzta 96:8ac966e2cd3f 166 .fnend
mzta 96:8ac966e2cd3f 167 .size _free_box, .-_free_box
mzta 96:8ac966e2cd3f 168
mzta 96:8ac966e2cd3f 169
mzta 96:8ac966e2cd3f 170 /*-------------------------- SVC_Handler ------------------------------------*/
mzta 96:8ac966e2cd3f 171
mzta 96:8ac966e2cd3f 172 # void SVC_Handler (void);
mzta 96:8ac966e2cd3f 173
mzta 96:8ac966e2cd3f 174 .thumb_func
mzta 96:8ac966e2cd3f 175 .type SVC_Handler, %function
mzta 96:8ac966e2cd3f 176 .global SVC_Handler
mzta 96:8ac966e2cd3f 177 SVC_Handler:
mzta 96:8ac966e2cd3f 178 .fnstart
mzta 96:8ac966e2cd3f 179 .cantunwind
mzta 96:8ac966e2cd3f 180
mzta 96:8ac966e2cd3f 181 MRS R0,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 182 LDR R1,[R0,#24] /* Read Saved PC from Stack */
mzta 96:8ac966e2cd3f 183 LDRB R1,[R1,#-2] /* Load SVC Number */
mzta 96:8ac966e2cd3f 184 CBNZ R1,SVC_User
mzta 96:8ac966e2cd3f 185
mzta 96:8ac966e2cd3f 186 LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */
mzta 96:8ac966e2cd3f 187 BLX R12 /* Call SVC Function */
mzta 96:8ac966e2cd3f 188
mzta 96:8ac966e2cd3f 189 MRS R12,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 190 STM R12,{R0-R2} /* Store return values */
mzta 96:8ac966e2cd3f 191
mzta 96:8ac966e2cd3f 192 LDR R3,=os_tsk
mzta 96:8ac966e2cd3f 193 LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */
mzta 96:8ac966e2cd3f 194 CMP R1,R2
mzta 96:8ac966e2cd3f 195 BEQ SVC_Exit /* no task switch */
mzta 96:8ac966e2cd3f 196
mzta 96:8ac966e2cd3f 197 CBZ R1,SVC_Next /* Runtask deleted? */
mzta 96:8ac966e2cd3f 198 STMDB R12!,{R4-R11} /* Save Old context */
mzta 96:8ac966e2cd3f 199 STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */
mzta 96:8ac966e2cd3f 200
mzta 96:8ac966e2cd3f 201 PUSH {R2,R3}
mzta 96:8ac966e2cd3f 202 BL rt_stk_check /* Check for Stack overflow */
mzta 96:8ac966e2cd3f 203 POP {R2,R3}
mzta 96:8ac966e2cd3f 204
mzta 96:8ac966e2cd3f 205 SVC_Next:
mzta 96:8ac966e2cd3f 206 STR R2,[R3] /* os_tsk.run = os_tsk.new */
mzta 96:8ac966e2cd3f 207
mzta 96:8ac966e2cd3f 208 LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */
mzta 96:8ac966e2cd3f 209 LDMIA R12!,{R4-R11} /* Restore New Context */
mzta 96:8ac966e2cd3f 210 MSR PSP,R12 /* Write PSP */
mzta 96:8ac966e2cd3f 211
mzta 96:8ac966e2cd3f 212 SVC_Exit:
mzta 96:8ac966e2cd3f 213 MVN LR,#~0xFFFFFFFD /* set EXC_RETURN value */
mzta 96:8ac966e2cd3f 214 BX LR
mzta 96:8ac966e2cd3f 215
mzta 96:8ac966e2cd3f 216 /*------------------- User SVC ------------------------------*/
mzta 96:8ac966e2cd3f 217
mzta 96:8ac966e2cd3f 218 SVC_User:
mzta 96:8ac966e2cd3f 219 PUSH {R4,LR} /* Save Registers */
mzta 96:8ac966e2cd3f 220 LDR R2,=SVC_Count
mzta 96:8ac966e2cd3f 221 LDR R2,[R2]
mzta 96:8ac966e2cd3f 222 CMP R1,R2
mzta 96:8ac966e2cd3f 223 BHI SVC_Done /* Overflow */
mzta 96:8ac966e2cd3f 224
mzta 96:8ac966e2cd3f 225 LDR R4,=SVC_Table-4
mzta 96:8ac966e2cd3f 226 LDR R4,[R4,R1,LSL #2] /* Load SVC Function Address */
mzta 96:8ac966e2cd3f 227
mzta 96:8ac966e2cd3f 228 LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */
mzta 96:8ac966e2cd3f 229 BLX R4 /* Call SVC Function */
mzta 96:8ac966e2cd3f 230
mzta 96:8ac966e2cd3f 231 MRS R12,PSP
mzta 96:8ac966e2cd3f 232 STM R12,{R0-R3} /* Function return values */
mzta 96:8ac966e2cd3f 233 SVC_Done:
mzta 96:8ac966e2cd3f 234 POP {R4,PC} /* RETI */
mzta 96:8ac966e2cd3f 235
mzta 96:8ac966e2cd3f 236 .fnend
mzta 96:8ac966e2cd3f 237 .size SVC_Handler, .-SVC_Handler
mzta 96:8ac966e2cd3f 238
mzta 96:8ac966e2cd3f 239
mzta 96:8ac966e2cd3f 240 /*-------------------------- PendSV_Handler ---------------------------------*/
mzta 96:8ac966e2cd3f 241
mzta 96:8ac966e2cd3f 242 # void PendSV_Handler (void);
mzta 96:8ac966e2cd3f 243
mzta 96:8ac966e2cd3f 244 .thumb_func
mzta 96:8ac966e2cd3f 245 .type PendSV_Handler, %function
mzta 96:8ac966e2cd3f 246 .global PendSV_Handler
mzta 96:8ac966e2cd3f 247 .global Sys_Switch
mzta 96:8ac966e2cd3f 248 PendSV_Handler:
mzta 96:8ac966e2cd3f 249 .fnstart
mzta 96:8ac966e2cd3f 250 .cantunwind
mzta 96:8ac966e2cd3f 251
mzta 96:8ac966e2cd3f 252 BL rt_pop_req
mzta 96:8ac966e2cd3f 253
mzta 96:8ac966e2cd3f 254 Sys_Switch:
mzta 96:8ac966e2cd3f 255 LDR R3,=os_tsk
mzta 96:8ac966e2cd3f 256 LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */
mzta 96:8ac966e2cd3f 257 CMP R1,R2
mzta 96:8ac966e2cd3f 258 BEQ Sys_Exit
mzta 96:8ac966e2cd3f 259
mzta 96:8ac966e2cd3f 260 MRS R12,PSP /* Read PSP */
mzta 96:8ac966e2cd3f 261 STMDB R12!,{R4-R11} /* Save Old context */
mzta 96:8ac966e2cd3f 262 STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */
mzta 96:8ac966e2cd3f 263
mzta 96:8ac966e2cd3f 264 PUSH {R2,R3}
mzta 96:8ac966e2cd3f 265 BL rt_stk_check /* Check for Stack overflow */
mzta 96:8ac966e2cd3f 266 POP {R2,R3}
mzta 96:8ac966e2cd3f 267
mzta 96:8ac966e2cd3f 268 STR R2,[R3] /* os_tsk.run = os_tsk.new */
mzta 96:8ac966e2cd3f 269
mzta 96:8ac966e2cd3f 270 LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */
mzta 96:8ac966e2cd3f 271 LDMIA R12!,{R4-R11} /* Restore New Context */
mzta 96:8ac966e2cd3f 272 MSR PSP,R12 /* Write PSP */
mzta 96:8ac966e2cd3f 273
mzta 96:8ac966e2cd3f 274 Sys_Exit:
mzta 96:8ac966e2cd3f 275 MVN LR,#~0xFFFFFFFD /* set EXC_RETURN value */
mzta 96:8ac966e2cd3f 276 BX LR /* Return to Thread Mode */
mzta 96:8ac966e2cd3f 277
mzta 96:8ac966e2cd3f 278 .fnend
mzta 96:8ac966e2cd3f 279 .size PendSV_Handler, .-PendSV_Handler
mzta 96:8ac966e2cd3f 280
mzta 96:8ac966e2cd3f 281
mzta 96:8ac966e2cd3f 282 /*-------------------------- SysTick_Handler --------------------------------*/
mzta 96:8ac966e2cd3f 283
mzta 96:8ac966e2cd3f 284 # void SysTick_Handler (void);
mzta 96:8ac966e2cd3f 285
mzta 96:8ac966e2cd3f 286 .thumb_func
mzta 96:8ac966e2cd3f 287 .type SysTick_Handler, %function
mzta 96:8ac966e2cd3f 288 .global SysTick_Handler
mzta 96:8ac966e2cd3f 289 SysTick_Handler:
mzta 96:8ac966e2cd3f 290 .fnstart
mzta 96:8ac966e2cd3f 291 .cantunwind
mzta 96:8ac966e2cd3f 292
mzta 96:8ac966e2cd3f 293 BL rt_systick
mzta 96:8ac966e2cd3f 294 B Sys_Switch
mzta 96:8ac966e2cd3f 295
mzta 96:8ac966e2cd3f 296 .fnend
mzta 96:8ac966e2cd3f 297 .size SysTick_Handler, .-SysTick_Handler
mzta 96:8ac966e2cd3f 298
mzta 96:8ac966e2cd3f 299
mzta 96:8ac966e2cd3f 300 /*-------------------------- OS_Tick_Handler --------------------------------*/
mzta 96:8ac966e2cd3f 301
mzta 96:8ac966e2cd3f 302 # void OS_Tick_Handler (void);
mzta 96:8ac966e2cd3f 303
mzta 96:8ac966e2cd3f 304 .thumb_func
mzta 96:8ac966e2cd3f 305 .type OS_Tick_Handler, %function
mzta 96:8ac966e2cd3f 306 .global OS_Tick_Handler
mzta 96:8ac966e2cd3f 307 OS_Tick_Handler:
mzta 96:8ac966e2cd3f 308 .fnstart
mzta 96:8ac966e2cd3f 309 .cantunwind
mzta 96:8ac966e2cd3f 310
mzta 96:8ac966e2cd3f 311 BL os_tick_irqack
mzta 96:8ac966e2cd3f 312 BL rt_systick
mzta 96:8ac966e2cd3f 313 B Sys_Switch
mzta 96:8ac966e2cd3f 314
mzta 96:8ac966e2cd3f 315 .fnend
mzta 96:8ac966e2cd3f 316 .size OS_Tick_Handler, .-OS_Tick_Handler
mzta 96:8ac966e2cd3f 317
mzta 96:8ac966e2cd3f 318
mzta 96:8ac966e2cd3f 319 .end
mzta 96:8ac966e2cd3f 320
mzta 96:8ac966e2cd3f 321 /*----------------------------------------------------------------------------
mzta 96:8ac966e2cd3f 322 * end of file
mzta 96:8ac966e2cd3f 323 *---------------------------------------------------------------------------*/