mutex++
Dependents: header_main_publish
Fork of mbed-rtos by
rtx/TARGET_M4/TOOLCHAIN_GCC/HAL_CM4.s@13:869ef732a8a2, 2013-08-05 (annotated)
- Committer:
- bogdanm
- Date:
- Mon Aug 05 14:12:52 2013 +0300
- Revision:
- 13:869ef732a8a2
- Parent:
- rtx/LPC4088/GCC_CR/HAL_CM4.s@12:58b30ac3f00e
Update sources to revision 64
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 12:58b30ac3f00e | 1 | /*---------------------------------------------------------------------------- |
emilmont | 12:58b30ac3f00e | 2 | * RL-ARM - RTX |
emilmont | 12:58b30ac3f00e | 3 | *---------------------------------------------------------------------------- |
emilmont | 12:58b30ac3f00e | 4 | * Name: HAL_CM4.S |
emilmont | 12:58b30ac3f00e | 5 | * Purpose: Hardware Abstraction Layer for Cortex-M4 |
emilmont | 12:58b30ac3f00e | 6 | * Rev.: V4.70 |
emilmont | 12:58b30ac3f00e | 7 | *---------------------------------------------------------------------------- |
emilmont | 12:58b30ac3f00e | 8 | * |
emilmont | 12:58b30ac3f00e | 9 | * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH |
emilmont | 12:58b30ac3f00e | 10 | * All rights reserved. |
emilmont | 12:58b30ac3f00e | 11 | * Redistribution and use in source and binary forms, with or without |
emilmont | 12:58b30ac3f00e | 12 | * modification, are permitted provided that the following conditions are met: |
emilmont | 12:58b30ac3f00e | 13 | * - Redistributions of source code must retain the above copyright |
emilmont | 12:58b30ac3f00e | 14 | * notice, this list of conditions and the following disclaimer. |
emilmont | 12:58b30ac3f00e | 15 | * - Redistributions in binary form must reproduce the above copyright |
emilmont | 12:58b30ac3f00e | 16 | * notice, this list of conditions and the following disclaimer in the |
emilmont | 12:58b30ac3f00e | 17 | * documentation and/or other materials provided with the distribution. |
emilmont | 12:58b30ac3f00e | 18 | * - Neither the name of ARM nor the names of its contributors may be used |
emilmont | 12:58b30ac3f00e | 19 | * to endorse or promote products derived from this software without |
emilmont | 12:58b30ac3f00e | 20 | * specific prior written permission. |
emilmont | 12:58b30ac3f00e | 21 | * |
emilmont | 12:58b30ac3f00e | 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
emilmont | 12:58b30ac3f00e | 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
emilmont | 12:58b30ac3f00e | 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
emilmont | 12:58b30ac3f00e | 25 | * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE |
emilmont | 12:58b30ac3f00e | 26 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
emilmont | 12:58b30ac3f00e | 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
emilmont | 12:58b30ac3f00e | 28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
emilmont | 12:58b30ac3f00e | 29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
emilmont | 12:58b30ac3f00e | 30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
emilmont | 12:58b30ac3f00e | 31 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
emilmont | 12:58b30ac3f00e | 32 | * POSSIBILITY OF SUCH DAMAGE. |
emilmont | 12:58b30ac3f00e | 33 | *---------------------------------------------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 34 | |
emilmont | 12:58b30ac3f00e | 35 | .file "HAL_CM4.S" |
emilmont | 12:58b30ac3f00e | 36 | .syntax unified |
emilmont | 12:58b30ac3f00e | 37 | |
emilmont | 12:58b30ac3f00e | 38 | .equ TCB_STACKF, 32 |
emilmont | 12:58b30ac3f00e | 39 | .equ TCB_TSTACK, 36 |
emilmont | 12:58b30ac3f00e | 40 | |
emilmont | 12:58b30ac3f00e | 41 | |
emilmont | 12:58b30ac3f00e | 42 | /*---------------------------------------------------------------------------- |
emilmont | 12:58b30ac3f00e | 43 | * Functions |
emilmont | 12:58b30ac3f00e | 44 | *---------------------------------------------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 45 | |
emilmont | 12:58b30ac3f00e | 46 | .thumb |
emilmont | 12:58b30ac3f00e | 47 | |
emilmont | 12:58b30ac3f00e | 48 | .section ".text" |
emilmont | 12:58b30ac3f00e | 49 | .align 2 |
emilmont | 12:58b30ac3f00e | 50 | |
emilmont | 12:58b30ac3f00e | 51 | |
emilmont | 12:58b30ac3f00e | 52 | /*--------------------------- rt_set_PSP ------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 53 | |
emilmont | 12:58b30ac3f00e | 54 | # void rt_set_PSP (U32 stack); |
emilmont | 12:58b30ac3f00e | 55 | |
emilmont | 12:58b30ac3f00e | 56 | .thumb_func |
emilmont | 12:58b30ac3f00e | 57 | .type rt_set_PSP, %function |
emilmont | 12:58b30ac3f00e | 58 | .global rt_set_PSP |
emilmont | 12:58b30ac3f00e | 59 | rt_set_PSP: |
emilmont | 12:58b30ac3f00e | 60 | .fnstart |
emilmont | 12:58b30ac3f00e | 61 | .cantunwind |
emilmont | 12:58b30ac3f00e | 62 | |
emilmont | 12:58b30ac3f00e | 63 | MSR PSP,R0 |
emilmont | 12:58b30ac3f00e | 64 | BX LR |
emilmont | 12:58b30ac3f00e | 65 | |
emilmont | 12:58b30ac3f00e | 66 | .fnend |
emilmont | 12:58b30ac3f00e | 67 | .size rt_set_PSP, .-rt_set_PSP |
emilmont | 12:58b30ac3f00e | 68 | |
emilmont | 12:58b30ac3f00e | 69 | |
emilmont | 12:58b30ac3f00e | 70 | /*--------------------------- rt_get_PSP ------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 71 | |
emilmont | 12:58b30ac3f00e | 72 | # U32 rt_get_PSP (void); |
emilmont | 12:58b30ac3f00e | 73 | |
emilmont | 12:58b30ac3f00e | 74 | .thumb_func |
emilmont | 12:58b30ac3f00e | 75 | .type rt_get_PSP, %function |
emilmont | 12:58b30ac3f00e | 76 | .global rt_get_PSP |
emilmont | 12:58b30ac3f00e | 77 | rt_get_PSP: |
emilmont | 12:58b30ac3f00e | 78 | .fnstart |
emilmont | 12:58b30ac3f00e | 79 | .cantunwind |
emilmont | 12:58b30ac3f00e | 80 | |
emilmont | 12:58b30ac3f00e | 81 | MRS R0,PSP |
emilmont | 12:58b30ac3f00e | 82 | BX LR |
emilmont | 12:58b30ac3f00e | 83 | |
emilmont | 12:58b30ac3f00e | 84 | .fnend |
emilmont | 12:58b30ac3f00e | 85 | .size rt_get_PSP, .-rt_get_PSP |
emilmont | 12:58b30ac3f00e | 86 | |
emilmont | 12:58b30ac3f00e | 87 | |
emilmont | 12:58b30ac3f00e | 88 | /*--------------------------- os_set_env ------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 89 | |
emilmont | 12:58b30ac3f00e | 90 | # void os_set_env (void); |
emilmont | 12:58b30ac3f00e | 91 | /* Switch to Unprivileged/Privileged Thread mode, use PSP. */ |
emilmont | 12:58b30ac3f00e | 92 | |
emilmont | 12:58b30ac3f00e | 93 | .thumb_func |
emilmont | 12:58b30ac3f00e | 94 | .type os_set_env, %function |
emilmont | 12:58b30ac3f00e | 95 | .global os_set_env |
emilmont | 12:58b30ac3f00e | 96 | os_set_env: |
emilmont | 12:58b30ac3f00e | 97 | .fnstart |
emilmont | 12:58b30ac3f00e | 98 | .cantunwind |
emilmont | 12:58b30ac3f00e | 99 | |
emilmont | 12:58b30ac3f00e | 100 | MOV R0,SP /* PSP = MSP */ |
emilmont | 12:58b30ac3f00e | 101 | MSR PSP,R0 |
emilmont | 12:58b30ac3f00e | 102 | LDR R0,=os_flags |
emilmont | 12:58b30ac3f00e | 103 | LDRB R0,[R0] |
emilmont | 12:58b30ac3f00e | 104 | LSLS R0,#31 |
emilmont | 12:58b30ac3f00e | 105 | ITE NE |
emilmont | 12:58b30ac3f00e | 106 | MOVNE R0,#0x02 /* Privileged Thread mode, use PSP */ |
emilmont | 12:58b30ac3f00e | 107 | MOVEQ R0,#0x03 /* Unprivileged Thread mode, use PSP */ |
emilmont | 12:58b30ac3f00e | 108 | MSR CONTROL,R0 |
emilmont | 12:58b30ac3f00e | 109 | BX LR |
emilmont | 12:58b30ac3f00e | 110 | |
emilmont | 12:58b30ac3f00e | 111 | .fnend |
emilmont | 12:58b30ac3f00e | 112 | .size os_set_env, .-os_set_env |
emilmont | 12:58b30ac3f00e | 113 | |
emilmont | 12:58b30ac3f00e | 114 | |
emilmont | 12:58b30ac3f00e | 115 | /*--------------------------- _alloc_box ------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 116 | |
emilmont | 12:58b30ac3f00e | 117 | # void *_alloc_box (void *box_mem); |
emilmont | 12:58b30ac3f00e | 118 | /* Function wrapper for Unprivileged/Privileged mode. */ |
emilmont | 12:58b30ac3f00e | 119 | |
emilmont | 12:58b30ac3f00e | 120 | .thumb_func |
emilmont | 12:58b30ac3f00e | 121 | .type _alloc_box, %function |
emilmont | 12:58b30ac3f00e | 122 | .global _alloc_box |
emilmont | 12:58b30ac3f00e | 123 | _alloc_box: |
emilmont | 12:58b30ac3f00e | 124 | .fnstart |
emilmont | 12:58b30ac3f00e | 125 | .cantunwind |
emilmont | 12:58b30ac3f00e | 126 | |
emilmont | 12:58b30ac3f00e | 127 | LDR R12,=rt_alloc_box |
emilmont | 12:58b30ac3f00e | 128 | MRS R3,IPSR |
emilmont | 12:58b30ac3f00e | 129 | LSLS R3,#24 |
emilmont | 12:58b30ac3f00e | 130 | IT NE |
emilmont | 12:58b30ac3f00e | 131 | BXNE R12 |
emilmont | 12:58b30ac3f00e | 132 | MRS R3,CONTROL |
emilmont | 12:58b30ac3f00e | 133 | LSLS R3,#31 |
emilmont | 12:58b30ac3f00e | 134 | IT EQ |
emilmont | 12:58b30ac3f00e | 135 | BXEQ R12 |
emilmont | 12:58b30ac3f00e | 136 | SVC 0 |
emilmont | 12:58b30ac3f00e | 137 | BX LR |
emilmont | 12:58b30ac3f00e | 138 | |
emilmont | 12:58b30ac3f00e | 139 | .fnend |
emilmont | 12:58b30ac3f00e | 140 | .size _alloc_box, .-_alloc_box |
emilmont | 12:58b30ac3f00e | 141 | |
emilmont | 12:58b30ac3f00e | 142 | |
emilmont | 12:58b30ac3f00e | 143 | /*--------------------------- _free_box -------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 144 | |
emilmont | 12:58b30ac3f00e | 145 | # int _free_box (void *box_mem, void *box); |
emilmont | 12:58b30ac3f00e | 146 | /* Function wrapper for Unprivileged/Privileged mode. */ |
emilmont | 12:58b30ac3f00e | 147 | |
emilmont | 12:58b30ac3f00e | 148 | .thumb_func |
emilmont | 12:58b30ac3f00e | 149 | .type _free_box, %function |
emilmont | 12:58b30ac3f00e | 150 | .global _free_box |
emilmont | 12:58b30ac3f00e | 151 | _free_box: |
emilmont | 12:58b30ac3f00e | 152 | .fnstart |
emilmont | 12:58b30ac3f00e | 153 | .cantunwind |
emilmont | 12:58b30ac3f00e | 154 | |
emilmont | 12:58b30ac3f00e | 155 | LDR R12,=rt_free_box |
emilmont | 12:58b30ac3f00e | 156 | MRS R3,IPSR |
emilmont | 12:58b30ac3f00e | 157 | LSLS R3,#24 |
emilmont | 12:58b30ac3f00e | 158 | IT NE |
emilmont | 12:58b30ac3f00e | 159 | BXNE R12 |
emilmont | 12:58b30ac3f00e | 160 | MRS R3,CONTROL |
emilmont | 12:58b30ac3f00e | 161 | LSLS R3,#31 |
emilmont | 12:58b30ac3f00e | 162 | IT EQ |
emilmont | 12:58b30ac3f00e | 163 | BXEQ R12 |
emilmont | 12:58b30ac3f00e | 164 | SVC 0 |
emilmont | 12:58b30ac3f00e | 165 | BX LR |
emilmont | 12:58b30ac3f00e | 166 | |
emilmont | 12:58b30ac3f00e | 167 | .fnend |
emilmont | 12:58b30ac3f00e | 168 | .size _free_box, .-_free_box |
emilmont | 12:58b30ac3f00e | 169 | |
emilmont | 12:58b30ac3f00e | 170 | |
emilmont | 12:58b30ac3f00e | 171 | /*-------------------------- SVC_Handler ------------------------------------*/ |
emilmont | 12:58b30ac3f00e | 172 | |
emilmont | 12:58b30ac3f00e | 173 | # void SVC_Handler (void); |
emilmont | 12:58b30ac3f00e | 174 | |
emilmont | 12:58b30ac3f00e | 175 | .thumb_func |
emilmont | 12:58b30ac3f00e | 176 | .type SVC_Handler, %function |
emilmont | 12:58b30ac3f00e | 177 | .global SVC_Handler |
emilmont | 12:58b30ac3f00e | 178 | SVC_Handler: |
emilmont | 12:58b30ac3f00e | 179 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 180 | .global SVC_Handler_Veneer |
emilmont | 12:58b30ac3f00e | 181 | SVC_Handler_Veneer: |
emilmont | 12:58b30ac3f00e | 182 | .endif |
emilmont | 12:58b30ac3f00e | 183 | .fnstart |
emilmont | 12:58b30ac3f00e | 184 | .cantunwind |
emilmont | 12:58b30ac3f00e | 185 | |
emilmont | 12:58b30ac3f00e | 186 | MRS R0,PSP /* Read PSP */ |
emilmont | 12:58b30ac3f00e | 187 | LDR R1,[R0,#24] /* Read Saved PC from Stack */ |
emilmont | 12:58b30ac3f00e | 188 | LDRB R1,[R1,#-2] /* Load SVC Number */ |
emilmont | 12:58b30ac3f00e | 189 | CBNZ R1,SVC_User |
emilmont | 12:58b30ac3f00e | 190 | |
emilmont | 12:58b30ac3f00e | 191 | LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */ |
emilmont | 12:58b30ac3f00e | 192 | PUSH {R4,LR} /* Save EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 193 | BLX R12 /* Call SVC Function */ |
emilmont | 12:58b30ac3f00e | 194 | POP {R4,LR} /* Restore EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 195 | |
emilmont | 12:58b30ac3f00e | 196 | MRS R12,PSP /* Read PSP */ |
emilmont | 12:58b30ac3f00e | 197 | STM R12,{R0-R2} /* Store return values */ |
emilmont | 12:58b30ac3f00e | 198 | |
emilmont | 12:58b30ac3f00e | 199 | LDR R3,=os_tsk |
emilmont | 12:58b30ac3f00e | 200 | LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */ |
emilmont | 12:58b30ac3f00e | 201 | CMP R1,R2 |
emilmont | 12:58b30ac3f00e | 202 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 203 | ITT EQ |
emilmont | 12:58b30ac3f00e | 204 | PUSHEQ {LR} |
emilmont | 12:58b30ac3f00e | 205 | POPEQ {PC} |
emilmont | 12:58b30ac3f00e | 206 | .else |
emilmont | 12:58b30ac3f00e | 207 | IT EQ |
emilmont | 12:58b30ac3f00e | 208 | BXEQ LR /* RETI, no task switch */ |
emilmont | 12:58b30ac3f00e | 209 | .endif |
emilmont | 12:58b30ac3f00e | 210 | |
emilmont | 12:58b30ac3f00e | 211 | CBZ R1,SVC_Next /* Runtask deleted? */ |
emilmont | 12:58b30ac3f00e | 212 | TST LR,#0x10 /* is it extended frame? */ |
emilmont | 12:58b30ac3f00e | 213 | ITTE EQ |
emilmont | 12:58b30ac3f00e | 214 | VSTMDBEQ R12!,{S16-S31} /* yes, stack also VFP hi-regs */ |
emilmont | 12:58b30ac3f00e | 215 | MOVEQ R0,#0x01 /* os_tsk->stack_frame val */ |
emilmont | 12:58b30ac3f00e | 216 | MOVNE R0,#0x00 |
emilmont | 12:58b30ac3f00e | 217 | STRB R0,[R1,#TCB_STACKF] /* os_tsk.run->stack_frame = val */ |
emilmont | 12:58b30ac3f00e | 218 | STMDB R12!,{R4-R11} /* Save Old context */ |
emilmont | 12:58b30ac3f00e | 219 | STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */ |
emilmont | 12:58b30ac3f00e | 220 | |
emilmont | 12:58b30ac3f00e | 221 | PUSH {R2,R3} |
emilmont | 12:58b30ac3f00e | 222 | BL rt_stk_check /* Check for Stack overflow */ |
emilmont | 12:58b30ac3f00e | 223 | POP {R2,R3} |
emilmont | 12:58b30ac3f00e | 224 | |
emilmont | 12:58b30ac3f00e | 225 | SVC_Next: |
emilmont | 12:58b30ac3f00e | 226 | STR R2,[R3] /* os_tsk.run = os_tsk.new */ |
emilmont | 12:58b30ac3f00e | 227 | |
emilmont | 12:58b30ac3f00e | 228 | LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */ |
emilmont | 12:58b30ac3f00e | 229 | LDMIA R12!,{R4-R11} /* Restore New Context */ |
emilmont | 12:58b30ac3f00e | 230 | LDRB R0,[R2,#TCB_STACKF] /* Stack Frame */ |
emilmont | 12:58b30ac3f00e | 231 | CMP R0,#0 /* Basic/Extended Stack Frame */ |
emilmont | 12:58b30ac3f00e | 232 | ITTE NE |
emilmont | 12:58b30ac3f00e | 233 | VLDMIANE R12!,{S16-S31} /* restore VFP hi-registers */ |
emilmont | 12:58b30ac3f00e | 234 | MVNNE LR,#~0xFFFFFFED /* set EXC_RETURN value */ |
emilmont | 12:58b30ac3f00e | 235 | MVNEQ LR,#~0xFFFFFFFD |
emilmont | 12:58b30ac3f00e | 236 | MSR PSP,R12 /* Write PSP */ |
emilmont | 12:58b30ac3f00e | 237 | |
emilmont | 12:58b30ac3f00e | 238 | SVC_Exit: |
emilmont | 12:58b30ac3f00e | 239 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 240 | PUSH {LR} |
emilmont | 12:58b30ac3f00e | 241 | POP {PC} |
emilmont | 12:58b30ac3f00e | 242 | .else |
emilmont | 12:58b30ac3f00e | 243 | BX LR |
emilmont | 12:58b30ac3f00e | 244 | .endif |
emilmont | 12:58b30ac3f00e | 245 | |
emilmont | 12:58b30ac3f00e | 246 | /*------------------- User SVC ------------------------------*/ |
emilmont | 12:58b30ac3f00e | 247 | |
emilmont | 12:58b30ac3f00e | 248 | SVC_User: |
emilmont | 12:58b30ac3f00e | 249 | PUSH {R4,LR} /* Save Registers */ |
emilmont | 12:58b30ac3f00e | 250 | LDR R2,=SVC_Count |
emilmont | 12:58b30ac3f00e | 251 | LDR R2,[R2] |
emilmont | 12:58b30ac3f00e | 252 | CMP R1,R2 |
emilmont | 12:58b30ac3f00e | 253 | BHI SVC_Done /* Overflow */ |
emilmont | 12:58b30ac3f00e | 254 | |
emilmont | 12:58b30ac3f00e | 255 | LDR R4,=SVC_Table-4 |
emilmont | 12:58b30ac3f00e | 256 | LDR R4,[R4,R1,LSL #2] /* Load SVC Function Address */ |
emilmont | 12:58b30ac3f00e | 257 | |
emilmont | 12:58b30ac3f00e | 258 | LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */ |
emilmont | 12:58b30ac3f00e | 259 | BLX R4 /* Call SVC Function */ |
emilmont | 12:58b30ac3f00e | 260 | |
emilmont | 12:58b30ac3f00e | 261 | MRS R12,PSP |
emilmont | 12:58b30ac3f00e | 262 | STM R12,{R0-R3} /* Function return values */ |
emilmont | 12:58b30ac3f00e | 263 | SVC_Done: |
emilmont | 12:58b30ac3f00e | 264 | POP {R4,PC} /* RETI */ |
emilmont | 12:58b30ac3f00e | 265 | |
emilmont | 12:58b30ac3f00e | 266 | .fnend |
emilmont | 12:58b30ac3f00e | 267 | .size SVC_Handler, .-SVC_Handler |
emilmont | 12:58b30ac3f00e | 268 | |
emilmont | 12:58b30ac3f00e | 269 | |
emilmont | 12:58b30ac3f00e | 270 | /*-------------------------- PendSV_Handler ---------------------------------*/ |
emilmont | 12:58b30ac3f00e | 271 | |
emilmont | 12:58b30ac3f00e | 272 | # void PendSV_Handler (void); |
emilmont | 12:58b30ac3f00e | 273 | |
emilmont | 12:58b30ac3f00e | 274 | .thumb_func |
emilmont | 12:58b30ac3f00e | 275 | .type PendSV_Handler, %function |
emilmont | 12:58b30ac3f00e | 276 | .global PendSV_Handler |
emilmont | 12:58b30ac3f00e | 277 | .global Sys_Switch |
emilmont | 12:58b30ac3f00e | 278 | PendSV_Handler: |
emilmont | 12:58b30ac3f00e | 279 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 280 | .global PendSV_Handler_Veneer |
emilmont | 12:58b30ac3f00e | 281 | PendSV_Handler_Veneer: |
emilmont | 12:58b30ac3f00e | 282 | .endif |
emilmont | 12:58b30ac3f00e | 283 | .fnstart |
emilmont | 12:58b30ac3f00e | 284 | .cantunwind |
emilmont | 12:58b30ac3f00e | 285 | |
emilmont | 12:58b30ac3f00e | 286 | PUSH {R4,LR} /* Save EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 287 | BL rt_pop_req |
emilmont | 12:58b30ac3f00e | 288 | |
emilmont | 12:58b30ac3f00e | 289 | Sys_Switch: |
emilmont | 12:58b30ac3f00e | 290 | POP {R4,LR} /* Restore EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 291 | |
emilmont | 12:58b30ac3f00e | 292 | LDR R3,=os_tsk |
emilmont | 12:58b30ac3f00e | 293 | LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */ |
emilmont | 12:58b30ac3f00e | 294 | CMP R1,R2 |
emilmont | 12:58b30ac3f00e | 295 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 296 | ITT EQ |
emilmont | 12:58b30ac3f00e | 297 | PUSHEQ {LR} |
emilmont | 12:58b30ac3f00e | 298 | POPEQ {PC} |
emilmont | 12:58b30ac3f00e | 299 | .else |
emilmont | 12:58b30ac3f00e | 300 | IT EQ |
emilmont | 12:58b30ac3f00e | 301 | BXEQ LR /* RETI, no task switch */ |
emilmont | 12:58b30ac3f00e | 302 | .endif |
emilmont | 12:58b30ac3f00e | 303 | |
emilmont | 12:58b30ac3f00e | 304 | MRS R12,PSP /* Read PSP */ |
emilmont | 12:58b30ac3f00e | 305 | TST LR,#0x10 /* is it extended frame? */ |
emilmont | 12:58b30ac3f00e | 306 | ITTE EQ |
emilmont | 12:58b30ac3f00e | 307 | VSTMDBEQ R12!,{S16-S31} /* yes, stack also VFP hi-regs */ |
emilmont | 12:58b30ac3f00e | 308 | MOVEQ R0,#0x01 /* os_tsk->stack_frame val */ |
emilmont | 12:58b30ac3f00e | 309 | MOVNE R0,#0x00 |
emilmont | 12:58b30ac3f00e | 310 | STRB R0,[R1,#TCB_STACKF] /* os_tsk.run->stack_frame = val */ |
emilmont | 12:58b30ac3f00e | 311 | STMDB R12!,{R4-R11} /* Save Old context */ |
emilmont | 12:58b30ac3f00e | 312 | STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */ |
emilmont | 12:58b30ac3f00e | 313 | |
emilmont | 12:58b30ac3f00e | 314 | PUSH {R2,R3} |
emilmont | 12:58b30ac3f00e | 315 | BL rt_stk_check /* Check for Stack overflow */ |
emilmont | 12:58b30ac3f00e | 316 | POP {R2,R3} |
emilmont | 12:58b30ac3f00e | 317 | |
emilmont | 12:58b30ac3f00e | 318 | STR R2,[R3] /* os_tsk.run = os_tsk.new */ |
emilmont | 12:58b30ac3f00e | 319 | |
emilmont | 12:58b30ac3f00e | 320 | LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */ |
emilmont | 12:58b30ac3f00e | 321 | LDMIA R12!,{R4-R11} /* Restore New Context */ |
emilmont | 12:58b30ac3f00e | 322 | LDRB R0,[R2,#TCB_STACKF] /* Stack Frame */ |
emilmont | 12:58b30ac3f00e | 323 | CMP R0,#0 /* Basic/Extended Stack Frame */ |
emilmont | 12:58b30ac3f00e | 324 | ITTE NE |
emilmont | 12:58b30ac3f00e | 325 | VLDMIANE R12!,{S16-S31} /* restore VFP hi-registers */ |
emilmont | 12:58b30ac3f00e | 326 | MVNNE LR,#~0xFFFFFFED /* set EXC_RETURN value */ |
emilmont | 12:58b30ac3f00e | 327 | MVNEQ LR,#~0xFFFFFFFD |
emilmont | 12:58b30ac3f00e | 328 | MSR PSP,R12 /* Write PSP */ |
emilmont | 12:58b30ac3f00e | 329 | |
emilmont | 12:58b30ac3f00e | 330 | Sys_Exit: |
emilmont | 12:58b30ac3f00e | 331 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 332 | PUSH {LR} |
emilmont | 12:58b30ac3f00e | 333 | POP {PC} |
emilmont | 12:58b30ac3f00e | 334 | .else |
emilmont | 12:58b30ac3f00e | 335 | BX LR /* Return to Thread Mode */ |
emilmont | 12:58b30ac3f00e | 336 | .endif |
emilmont | 12:58b30ac3f00e | 337 | |
emilmont | 12:58b30ac3f00e | 338 | .fnend |
emilmont | 12:58b30ac3f00e | 339 | .size PendSV_Handler, .-PendSV_Handler |
emilmont | 12:58b30ac3f00e | 340 | |
emilmont | 12:58b30ac3f00e | 341 | |
emilmont | 12:58b30ac3f00e | 342 | /*-------------------------- SysTick_Handler --------------------------------*/ |
emilmont | 12:58b30ac3f00e | 343 | |
emilmont | 12:58b30ac3f00e | 344 | # void SysTick_Handler (void); |
emilmont | 12:58b30ac3f00e | 345 | |
emilmont | 12:58b30ac3f00e | 346 | .thumb_func |
emilmont | 12:58b30ac3f00e | 347 | .type SysTick_Handler, %function |
emilmont | 12:58b30ac3f00e | 348 | .global SysTick_Handler |
emilmont | 12:58b30ac3f00e | 349 | SysTick_Handler: |
emilmont | 12:58b30ac3f00e | 350 | .ifdef IFX_XMC4XXX |
emilmont | 12:58b30ac3f00e | 351 | .global SysTick_Handler_Veneer |
emilmont | 12:58b30ac3f00e | 352 | SysTick_Handler_Veneer: |
emilmont | 12:58b30ac3f00e | 353 | .endif |
emilmont | 12:58b30ac3f00e | 354 | .fnstart |
emilmont | 12:58b30ac3f00e | 355 | .cantunwind |
emilmont | 12:58b30ac3f00e | 356 | |
emilmont | 12:58b30ac3f00e | 357 | PUSH {R4,LR} /* Save EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 358 | BL rt_systick |
emilmont | 12:58b30ac3f00e | 359 | B Sys_Switch |
emilmont | 12:58b30ac3f00e | 360 | |
emilmont | 12:58b30ac3f00e | 361 | .fnend |
emilmont | 12:58b30ac3f00e | 362 | .size SysTick_Handler, .-SysTick_Handler |
emilmont | 12:58b30ac3f00e | 363 | |
emilmont | 12:58b30ac3f00e | 364 | |
emilmont | 12:58b30ac3f00e | 365 | /*-------------------------- OS_Tick_Handler --------------------------------*/ |
emilmont | 12:58b30ac3f00e | 366 | |
emilmont | 12:58b30ac3f00e | 367 | # void OS_Tick_Handler (void); |
emilmont | 12:58b30ac3f00e | 368 | |
emilmont | 12:58b30ac3f00e | 369 | .thumb_func |
emilmont | 12:58b30ac3f00e | 370 | .type OS_Tick_Handler, %function |
emilmont | 12:58b30ac3f00e | 371 | .global OS_Tick_Handler |
emilmont | 12:58b30ac3f00e | 372 | OS_Tick_Handler: |
emilmont | 12:58b30ac3f00e | 373 | .fnstart |
emilmont | 12:58b30ac3f00e | 374 | .cantunwind |
emilmont | 12:58b30ac3f00e | 375 | |
emilmont | 12:58b30ac3f00e | 376 | PUSH {R4,LR} /* Save EXC_RETURN */ |
emilmont | 12:58b30ac3f00e | 377 | BL os_tick_irqack |
emilmont | 12:58b30ac3f00e | 378 | BL rt_systick |
emilmont | 12:58b30ac3f00e | 379 | B Sys_Switch |
emilmont | 12:58b30ac3f00e | 380 | |
emilmont | 12:58b30ac3f00e | 381 | .fnend |
emilmont | 12:58b30ac3f00e | 382 | .size OS_Tick_Handler, .-OS_Tick_Handler |
emilmont | 12:58b30ac3f00e | 383 | |
emilmont | 12:58b30ac3f00e | 384 | |
emilmont | 12:58b30ac3f00e | 385 | .end |
emilmont | 12:58b30ac3f00e | 386 | |
emilmont | 12:58b30ac3f00e | 387 | /*---------------------------------------------------------------------------- |
emilmont | 12:58b30ac3f00e | 388 | * end of file |
emilmont | 12:58b30ac3f00e | 389 | *---------------------------------------------------------------------------*/ |