Russ Butler / mbed-rtos-legacy

Maintain legacy RTOS behavior before mbed-5

Fork of mbed-rtos by mbed official

rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/HAL_CM4.c@123:58563e6cba1e, 2016-11-14 (annotated)

Committer:
c1728p9
Date:
Mon Nov 14 17:14:42 2016 -0600
Revision:
123:58563e6cba1e
Parent:
112:53ace74b190c 
Configure RTOS to behave as it did before 5.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 49:77c8e4604045 1 /*----------------------------------------------------------------------------
mbed_official 112:53ace74b190c 2 * CMSIS-RTOS - RTX
mbed_official 49:77c8e4604045 3 *----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 4 * Name: HAL_CM4.C
mbed_official 49:77c8e4604045 5 * Purpose: Hardware Abstraction Layer for Cortex-M4
mbed_official 112:53ace74b190c 6 * Rev.: V4.79
mbed_official 49:77c8e4604045 7 *----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 8 *
mbed_official 112:53ace74b190c 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
mbed_official 49:77c8e4604045 10 * All rights reserved.
mbed_official 49:77c8e4604045 11 * Redistribution and use in source and binary forms, with or without
mbed_official 49:77c8e4604045 12 * modification, are permitted provided that the following conditions are met:
mbed_official 49:77c8e4604045 13 * - Redistributions of source code must retain the above copyright
mbed_official 49:77c8e4604045 14 * notice, this list of conditions and the following disclaimer.
mbed_official 49:77c8e4604045 15 * - Redistributions in binary form must reproduce the above copyright
mbed_official 49:77c8e4604045 16 * notice, this list of conditions and the following disclaimer in the
mbed_official 49:77c8e4604045 17 * documentation and/or other materials provided with the distribution.
mbed_official 49:77c8e4604045 18 * - Neither the name of ARM nor the names of its contributors may be used
mbed_official 49:77c8e4604045 19 * to endorse or promote products derived from this software without
mbed_official 49:77c8e4604045 20 * specific prior written permission.
mbed_official 49:77c8e4604045 21 *
mbed_official 49:77c8e4604045 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 49:77c8e4604045 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 49:77c8e4604045 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 49:77c8e4604045 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbed_official 49:77c8e4604045 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 49:77c8e4604045 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 49:77c8e4604045 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 49:77c8e4604045 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 49:77c8e4604045 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 49:77c8e4604045 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 49:77c8e4604045 32 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 49:77c8e4604045 33 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 34
mbed_official 49:77c8e4604045 35 #include "rt_TypeDef.h"
mbed_official 112:53ace74b190c 36 #include "RTX_Config.h"
mbed_official 49:77c8e4604045 37 #include "rt_System.h"
mbed_official 49:77c8e4604045 38 #include "rt_HAL_CM.h"
mbed_official 49:77c8e4604045 39 #include "rt_Task.h"
mbed_official 49:77c8e4604045 40 #include "rt_MemBox.h"
mbed_official 49:77c8e4604045 41
mbed_official 49:77c8e4604045 42
mbed_official 49:77c8e4604045 43 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 44 * Functions
mbed_official 49:77c8e4604045 45 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 46
mbed_official 49:77c8e4604045 47
mbed_official 49:77c8e4604045 48 /*--------------------------- rt_set_PSP ------------------------------------*/
mbed_official 49:77c8e4604045 49
mbed_official 49:77c8e4604045 50 __asm void rt_set_PSP (U32 stack) {
mbed_official 49:77c8e4604045 51 MSR PSP,R0
mbed_official 49:77c8e4604045 52 BX LR
mbed_official 49:77c8e4604045 53 }
mbed_official 49:77c8e4604045 54
mbed_official 49:77c8e4604045 55
mbed_official 49:77c8e4604045 56 /*--------------------------- rt_get_PSP ------------------------------------*/
mbed_official 49:77c8e4604045 57
mbed_official 49:77c8e4604045 58 __asm U32 rt_get_PSP (void) {
mbed_official 49:77c8e4604045 59 MRS R0,PSP
mbed_official 49:77c8e4604045 60 BX LR
mbed_official 49:77c8e4604045 61 }
mbed_official 49:77c8e4604045 62
mbed_official 49:77c8e4604045 63
mbed_official 49:77c8e4604045 64 /*--------------------------- os_set_env ------------------------------------*/
mbed_official 49:77c8e4604045 65
mbed_official 49:77c8e4604045 66 __asm void os_set_env (void) {
mbed_official 49:77c8e4604045 67 /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
mbed_official 49:77c8e4604045 68 MOV R0,SP ; PSP = MSP
mbed_official 49:77c8e4604045 69 MSR PSP,R0
mbed_official 49:77c8e4604045 70 LDR R0,=__cpp(&os_flags)
mbed_official 49:77c8e4604045 71 LDRB R0,[R0]
mbed_official 49:77c8e4604045 72 LSLS R0,#31
mbed_official 49:77c8e4604045 73 MOVNE R0,#0x02 ; Privileged Thread mode, use PSP
mbed_official 49:77c8e4604045 74 MOVEQ R0,#0x03 ; Unprivileged Thread mode, use PSP
mbed_official 49:77c8e4604045 75 MSR CONTROL,R0
mbed_official 49:77c8e4604045 76 BX LR
mbed_official 49:77c8e4604045 77
mbed_official 49:77c8e4604045 78 ALIGN
mbed_official 49:77c8e4604045 79 }
mbed_official 49:77c8e4604045 80
mbed_official 49:77c8e4604045 81
mbed_official 49:77c8e4604045 82 /*--------------------------- _alloc_box ------------------------------------*/
mbed_official 49:77c8e4604045 83
mbed_official 49:77c8e4604045 84 __asm void *_alloc_box (void *box_mem) {
mbed_official 49:77c8e4604045 85 /* Function wrapper for Unprivileged/Privileged mode. */
mbed_official 49:77c8e4604045 86 LDR R12,=__cpp(rt_alloc_box)
mbed_official 49:77c8e4604045 87 MRS R3,IPSR
mbed_official 49:77c8e4604045 88 LSLS R3,#24
mbed_official 49:77c8e4604045 89 BXNE R12
mbed_official 49:77c8e4604045 90 MRS R3,CONTROL
mbed_official 49:77c8e4604045 91 LSLS R3,#31
mbed_official 49:77c8e4604045 92 BXEQ R12
mbed_official 49:77c8e4604045 93 SVC 0
mbed_official 49:77c8e4604045 94 BX LR
mbed_official 49:77c8e4604045 95
mbed_official 49:77c8e4604045 96 ALIGN
mbed_official 49:77c8e4604045 97 }
mbed_official 49:77c8e4604045 98
mbed_official 49:77c8e4604045 99
mbed_official 49:77c8e4604045 100 /*--------------------------- _free_box -------------------------------------*/
mbed_official 49:77c8e4604045 101
mbed_official 112:53ace74b190c 102 __asm U32 _free_box (void *box_mem, void *box) {
mbed_official 49:77c8e4604045 103 /* Function wrapper for Unprivileged/Privileged mode. */
mbed_official 49:77c8e4604045 104 LDR R12,=__cpp(rt_free_box)
mbed_official 49:77c8e4604045 105 MRS R3,IPSR
mbed_official 49:77c8e4604045 106 LSLS R3,#24
mbed_official 49:77c8e4604045 107 BXNE R12
mbed_official 49:77c8e4604045 108 MRS R3,CONTROL
mbed_official 49:77c8e4604045 109 LSLS R3,#31
mbed_official 49:77c8e4604045 110 BXEQ R12
mbed_official 49:77c8e4604045 111 SVC 0
mbed_official 49:77c8e4604045 112 BX LR
mbed_official 49:77c8e4604045 113
mbed_official 49:77c8e4604045 114 ALIGN
mbed_official 49:77c8e4604045 115 }
mbed_official 49:77c8e4604045 116
mbed_official 49:77c8e4604045 117
mbed_official 49:77c8e4604045 118 /*-------------------------- SVC_Handler ------------------------------------*/
mbed_official 49:77c8e4604045 119
mbed_official 49:77c8e4604045 120 __asm void SVC_Handler (void) {
mbed_official 49:77c8e4604045 121 PRESERVE8
mbed_official 49:77c8e4604045 122
mbed_official 49:77c8e4604045 123 IMPORT SVC_Count
mbed_official 49:77c8e4604045 124 IMPORT SVC_Table
mbed_official 49:77c8e4604045 125 IMPORT rt_stk_check
mbed_official 49:77c8e4604045 126
mbed_official 49:77c8e4604045 127 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 128 EXPORT SVC_Handler_Veneer
mbed_official 49:77c8e4604045 129 SVC_Handler_Veneer
mbed_official 49:77c8e4604045 130 #endif
mbed_official 49:77c8e4604045 131
mbed_official 49:77c8e4604045 132 MRS R0,PSP ; Read PSP
mbed_official 49:77c8e4604045 133 LDR R1,[R0,#24] ; Read Saved PC from Stack
mbed_official 49:77c8e4604045 134 LDRB R1,[R1,#-2] ; Load SVC Number
mbed_official 49:77c8e4604045 135 CBNZ R1,SVC_User
mbed_official 49:77c8e4604045 136
mbed_official 49:77c8e4604045 137 LDM R0,{R0-R3,R12} ; Read R0-R3,R12 from stack
mbed_official 49:77c8e4604045 138 PUSH {R4,LR} ; Save EXC_RETURN
mbed_official 49:77c8e4604045 139 BLX R12 ; Call SVC Function
mbed_official 49:77c8e4604045 140 POP {R4,LR} ; Restore EXC_RETURN
mbed_official 49:77c8e4604045 141
mbed_official 49:77c8e4604045 142 MRS R12,PSP ; Read PSP
mbed_official 49:77c8e4604045 143 STM R12,{R0-R2} ; Store return values
mbed_official 49:77c8e4604045 144
mbed_official 49:77c8e4604045 145 LDR R3,=__cpp(&os_tsk)
mbed_official 49:77c8e4604045 146 LDM R3,{R1,R2} ; os_tsk.run, os_tsk.new
mbed_official 49:77c8e4604045 147 CMP R1,R2
mbed_official 49:77c8e4604045 148 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 149 PUSHEQ {LR}
mbed_official 49:77c8e4604045 150 POPEQ {PC}
mbed_official 49:77c8e4604045 151 #else
mbed_official 49:77c8e4604045 152 BXEQ LR ; RETI, no task switch
mbed_official 49:77c8e4604045 153 #endif
mbed_official 49:77c8e4604045 154
mbed_official 112:53ace74b190c 155 CBNZ R1,SVC_ContextSave ; Runtask not deleted?
mbed_official 112:53ace74b190c 156
mbed_official 112:53ace74b190c 157 TST LR,#0x10 ; is it extended frame?
mbed_official 112:53ace74b190c 158 BNE SVC_ContextRestore
mbed_official 112:53ace74b190c 159 LDR R1,=0xE000EF34
mbed_official 112:53ace74b190c 160 LDR R0,[R1] ; Load FPCCR
mbed_official 112:53ace74b190c 161 BIC R0,#1 ; Clear LSPACT (Lazy state)
mbed_official 112:53ace74b190c 162 STR R0,[R1] ; Store FPCCR
mbed_official 112:53ace74b190c 163 B SVC_ContextRestore
mbed_official 112:53ace74b190c 164
mbed_official 112:53ace74b190c 165 SVC_ContextSave
mbed_official 49:77c8e4604045 166 TST LR,#0x10 ; is it extended frame?
c1728p9 123:58563e6cba1e 167 #if (__FPU_PRESENT == 1)
mbed_official 49:77c8e4604045 168 VSTMDBEQ R12!,{S16-S31} ; yes, stack also VFP hi-regs
c1728p9 123:58563e6cba1e 169 #endif
mbed_official 49:77c8e4604045 170 MOVEQ R0,#0x01 ; os_tsk->stack_frame val
mbed_official 49:77c8e4604045 171 MOVNE R0,#0x00
mbed_official 49:77c8e4604045 172 STRB R0,[R1,#TCB_STACKF] ; os_tsk.run->stack_frame = val
mbed_official 49:77c8e4604045 173 STMDB R12!,{R4-R11} ; Save Old context
mbed_official 49:77c8e4604045 174 STR R12,[R1,#TCB_TSTACK] ; Update os_tsk.run->tsk_stack
mbed_official 49:77c8e4604045 175
mbed_official 49:77c8e4604045 176 PUSH {R2,R3}
mbed_official 49:77c8e4604045 177 BL rt_stk_check ; Check for Stack overflow
mbed_official 49:77c8e4604045 178 POP {R2,R3}
mbed_official 49:77c8e4604045 179
mbed_official 112:53ace74b190c 180 SVC_ContextRestore
mbed_official 49:77c8e4604045 181 STR R2,[R3] ; os_tsk.run = os_tsk.new
mbed_official 49:77c8e4604045 182
mbed_official 49:77c8e4604045 183 LDR R12,[R2,#TCB_TSTACK] ; os_tsk.new->tsk_stack
mbed_official 49:77c8e4604045 184 LDMIA R12!,{R4-R11} ; Restore New Context
mbed_official 49:77c8e4604045 185 LDRB R0,[R2,#TCB_STACKF] ; Stack Frame
mbed_official 49:77c8e4604045 186 CMP R0,#0 ; Basic/Extended Stack Frame
mbed_official 112:53ace74b190c 187 MVNEQ LR,#:NOT:0xFFFFFFFD ; set EXC_RETURN value
mbed_official 112:53ace74b190c 188 MVNNE LR,#:NOT:0xFFFFFFED
c1728p9 123:58563e6cba1e 189 #if (__FPU_PRESENT == 1)
mbed_official 49:77c8e4604045 190 VLDMIANE R12!,{S16-S31} ; restore VFP hi-registers
c1728p9 123:58563e6cba1e 191 #endif
mbed_official 49:77c8e4604045 192 MSR PSP,R12 ; Write PSP
mbed_official 49:77c8e4604045 193
mbed_official 49:77c8e4604045 194 SVC_Exit
mbed_official 49:77c8e4604045 195 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 196 PUSH {LR}
mbed_official 49:77c8e4604045 197 POP {PC}
mbed_official 49:77c8e4604045 198 #else
mbed_official 49:77c8e4604045 199 BX LR
mbed_official 49:77c8e4604045 200 #endif
mbed_official 49:77c8e4604045 201
mbed_official 49:77c8e4604045 202 /*------------------- User SVC ------------------------------*/
mbed_official 49:77c8e4604045 203
mbed_official 49:77c8e4604045 204 SVC_User
mbed_official 49:77c8e4604045 205 PUSH {R4,LR} ; Save Registers
mbed_official 49:77c8e4604045 206 LDR R2,=SVC_Count
mbed_official 49:77c8e4604045 207 LDR R2,[R2]
mbed_official 49:77c8e4604045 208 CMP R1,R2
mbed_official 49:77c8e4604045 209 BHI SVC_Done ; Overflow
mbed_official 49:77c8e4604045 210
mbed_official 49:77c8e4604045 211 LDR R4,=SVC_Table-4
mbed_official 49:77c8e4604045 212 LDR R4,[R4,R1,LSL #2] ; Load SVC Function Address
mbed_official 49:77c8e4604045 213
mbed_official 49:77c8e4604045 214 LDM R0,{R0-R3,R12} ; Read R0-R3,R12 from stack
mbed_official 49:77c8e4604045 215 BLX R4 ; Call SVC Function
mbed_official 49:77c8e4604045 216
mbed_official 49:77c8e4604045 217 MRS R12,PSP
mbed_official 49:77c8e4604045 218 STM R12,{R0-R3} ; Function return values
mbed_official 49:77c8e4604045 219 SVC_Done
mbed_official 49:77c8e4604045 220 POP {R4,PC} ; RETI
mbed_official 49:77c8e4604045 221
mbed_official 49:77c8e4604045 222 ALIGN
mbed_official 49:77c8e4604045 223 }
mbed_official 49:77c8e4604045 224
mbed_official 49:77c8e4604045 225
mbed_official 49:77c8e4604045 226 /*-------------------------- PendSV_Handler ---------------------------------*/
mbed_official 49:77c8e4604045 227
mbed_official 49:77c8e4604045 228 __asm void PendSV_Handler (void) {
mbed_official 49:77c8e4604045 229 PRESERVE8
mbed_official 49:77c8e4604045 230
mbed_official 49:77c8e4604045 231 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 232 EXPORT PendSV_Handler_Veneer
mbed_official 49:77c8e4604045 233 PendSV_Handler_Veneer
mbed_official 49:77c8e4604045 234 #endif
mbed_official 49:77c8e4604045 235
mbed_official 49:77c8e4604045 236 PUSH {R4,LR} ; Save EXC_RETURN
mbed_official 49:77c8e4604045 237 BL __cpp(rt_pop_req)
mbed_official 49:77c8e4604045 238
mbed_official 49:77c8e4604045 239 Sys_Switch
mbed_official 49:77c8e4604045 240 POP {R4,LR} ; Restore EXC_RETURN
mbed_official 49:77c8e4604045 241
mbed_official 49:77c8e4604045 242 LDR R3,=__cpp(&os_tsk)
mbed_official 49:77c8e4604045 243 LDM R3,{R1,R2} ; os_tsk.run, os_tsk.new
mbed_official 49:77c8e4604045 244 CMP R1,R2
mbed_official 49:77c8e4604045 245 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 246 PUSHEQ {LR}
mbed_official 49:77c8e4604045 247 POPEQ {PC}
mbed_official 49:77c8e4604045 248 #else
mbed_official 49:77c8e4604045 249 BXEQ LR ; RETI, no task switch
mbed_official 49:77c8e4604045 250 #endif
mbed_official 49:77c8e4604045 251
mbed_official 49:77c8e4604045 252 MRS R12,PSP ; Read PSP
mbed_official 49:77c8e4604045 253 TST LR,#0x10 ; is it extended frame?
c1728p9 123:58563e6cba1e 254 #if (__FPU_PRESENT == 1)
mbed_official 49:77c8e4604045 255 VSTMDBEQ R12!,{S16-S31} ; yes, stack also VFP hi-regs
c1728p9 123:58563e6cba1e 256 #endif
mbed_official 49:77c8e4604045 257 MOVEQ R0,#0x01 ; os_tsk->stack_frame val
mbed_official 49:77c8e4604045 258 MOVNE R0,#0x00
mbed_official 49:77c8e4604045 259 STRB R0,[R1,#TCB_STACKF] ; os_tsk.run->stack_frame = val
mbed_official 49:77c8e4604045 260 STMDB R12!,{R4-R11} ; Save Old context
mbed_official 49:77c8e4604045 261 STR R12,[R1,#TCB_TSTACK] ; Update os_tsk.run->tsk_stack
mbed_official 49:77c8e4604045 262
mbed_official 49:77c8e4604045 263 PUSH {R2,R3}
mbed_official 49:77c8e4604045 264 BL rt_stk_check ; Check for Stack overflow
mbed_official 49:77c8e4604045 265 POP {R2,R3}
mbed_official 49:77c8e4604045 266
mbed_official 49:77c8e4604045 267 STR R2,[R3] ; os_tsk.run = os_tsk.new
mbed_official 49:77c8e4604045 268
mbed_official 49:77c8e4604045 269 LDR R12,[R2,#TCB_TSTACK] ; os_tsk.new->tsk_stack
mbed_official 49:77c8e4604045 270 LDMIA R12!,{R4-R11} ; Restore New Context
mbed_official 49:77c8e4604045 271 LDRB R0,[R2,#TCB_STACKF] ; Stack Frame
mbed_official 49:77c8e4604045 272 CMP R0,#0 ; Basic/Extended Stack Frame
mbed_official 112:53ace74b190c 273 MVNEQ LR,#:NOT:0xFFFFFFFD ; set EXC_RETURN value
mbed_official 112:53ace74b190c 274 MVNNE LR,#:NOT:0xFFFFFFED
c1728p9 123:58563e6cba1e 275 #if (__FPU_PRESENT == 1)
mbed_official 49:77c8e4604045 276 VLDMIANE R12!,{S16-S31} ; restore VFP hi-regs
c1728p9 123:58563e6cba1e 277 #endif
mbed_official 49:77c8e4604045 278 MSR PSP,R12 ; Write PSP
mbed_official 49:77c8e4604045 279
mbed_official 49:77c8e4604045 280 Sys_Exit
mbed_official 49:77c8e4604045 281 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 282 PUSH {LR}
mbed_official 49:77c8e4604045 283 POP {PC}
mbed_official 49:77c8e4604045 284 #else
mbed_official 49:77c8e4604045 285 BX LR ; Return to Thread Mode
mbed_official 49:77c8e4604045 286 #endif
mbed_official 49:77c8e4604045 287
mbed_official 49:77c8e4604045 288 ALIGN
mbed_official 49:77c8e4604045 289 }
mbed_official 49:77c8e4604045 290
mbed_official 49:77c8e4604045 291
mbed_official 49:77c8e4604045 292 /*-------------------------- SysTick_Handler --------------------------------*/
mbed_official 49:77c8e4604045 293
mbed_official 49:77c8e4604045 294 __asm void SysTick_Handler (void) {
mbed_official 49:77c8e4604045 295 PRESERVE8
mbed_official 49:77c8e4604045 296
mbed_official 49:77c8e4604045 297 #ifdef IFX_XMC4XXX
mbed_official 49:77c8e4604045 298 EXPORT SysTick_Handler_Veneer
mbed_official 49:77c8e4604045 299 SysTick_Handler_Veneer
mbed_official 49:77c8e4604045 300 #endif
mbed_official 49:77c8e4604045 301
mbed_official 49:77c8e4604045 302 PUSH {R4,LR} ; Save EXC_RETURN
mbed_official 49:77c8e4604045 303 BL __cpp(rt_systick)
mbed_official 49:77c8e4604045 304 B Sys_Switch
mbed_official 49:77c8e4604045 305
mbed_official 49:77c8e4604045 306 ALIGN
mbed_official 49:77c8e4604045 307 }
mbed_official 49:77c8e4604045 308
mbed_official 49:77c8e4604045 309
mbed_official 49:77c8e4604045 310 /*-------------------------- OS_Tick_Handler --------------------------------*/
mbed_official 49:77c8e4604045 311
mbed_official 49:77c8e4604045 312 __asm void OS_Tick_Handler (void) {
mbed_official 49:77c8e4604045 313 PRESERVE8
mbed_official 49:77c8e4604045 314
mbed_official 49:77c8e4604045 315 PUSH {R4,LR} ; Save EXC_RETURN
mbed_official 49:77c8e4604045 316 BL __cpp(os_tick_irqack)
mbed_official 49:77c8e4604045 317 BL __cpp(rt_systick)
mbed_official 49:77c8e4604045 318 B Sys_Switch
mbed_official 49:77c8e4604045 319
mbed_official 49:77c8e4604045 320 ALIGN
mbed_official 49:77c8e4604045 321 }
mbed_official 49:77c8e4604045 322
mbed_official 49:77c8e4604045 323
mbed_official 49:77c8e4604045 324 /*----------------------------------------------------------------------------
mbed_official 49:77c8e4604045 325 * end of file
mbed_official 49:77c8e4604045 326 *---------------------------------------------------------------------------*/
mbed_official 49:77c8e4604045 327