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Diff: rtx/TARGET_M4/TOOLCHAIN_GCC/HAL_CM4.s
- Revision:
- 13:869ef732a8a2
- Parent:
- 12:58b30ac3f00e
diff -r 58b30ac3f00e -r 869ef732a8a2 rtx/TARGET_M4/TOOLCHAIN_GCC/HAL_CM4.s --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rtx/TARGET_M4/TOOLCHAIN_GCC/HAL_CM4.s Mon Aug 05 14:12:52 2013 +0300 @@ -0,0 +1,389 @@ +/*---------------------------------------------------------------------------- + * RL-ARM - RTX + *---------------------------------------------------------------------------- + * Name: HAL_CM4.S + * Purpose: Hardware Abstraction Layer for Cortex-M4 + * Rev.: V4.70 + *---------------------------------------------------------------------------- + * + * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH + * All rights reserved. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + *---------------------------------------------------------------------------*/ + + .file "HAL_CM4.S" + .syntax unified + + .equ TCB_STACKF, 32 + .equ TCB_TSTACK, 36 + + +/*---------------------------------------------------------------------------- + * Functions + *---------------------------------------------------------------------------*/ + + .thumb + + .section ".text" + .align 2 + + +/*--------------------------- rt_set_PSP ------------------------------------*/ + +# void rt_set_PSP (U32 stack); + + .thumb_func + .type rt_set_PSP, %function + .global rt_set_PSP +rt_set_PSP: + .fnstart + .cantunwind + + MSR PSP,R0 + BX LR + + .fnend + .size rt_set_PSP, .-rt_set_PSP + + +/*--------------------------- rt_get_PSP ------------------------------------*/ + +# U32 rt_get_PSP (void); + + .thumb_func + .type rt_get_PSP, %function + .global rt_get_PSP +rt_get_PSP: + .fnstart + .cantunwind + + MRS R0,PSP + BX LR + + .fnend + .size rt_get_PSP, .-rt_get_PSP + + +/*--------------------------- os_set_env ------------------------------------*/ + +# void os_set_env (void); + /* Switch to Unprivileged/Privileged Thread mode, use PSP. */ + + .thumb_func + .type os_set_env, %function + .global os_set_env +os_set_env: + .fnstart + .cantunwind + + MOV R0,SP /* PSP = MSP */ + MSR PSP,R0 + LDR R0,=os_flags + LDRB R0,[R0] + LSLS R0,#31 + ITE NE + MOVNE R0,#0x02 /* Privileged Thread mode, use PSP */ + MOVEQ R0,#0x03 /* Unprivileged Thread mode, use PSP */ + MSR CONTROL,R0 + BX LR + + .fnend + .size os_set_env, .-os_set_env + + +/*--------------------------- _alloc_box ------------------------------------*/ + +# void *_alloc_box (void *box_mem); + /* Function wrapper for Unprivileged/Privileged mode. */ + + .thumb_func + .type _alloc_box, %function + .global _alloc_box +_alloc_box: + .fnstart + .cantunwind + + LDR R12,=rt_alloc_box + MRS R3,IPSR + LSLS R3,#24 + IT NE + BXNE R12 + MRS R3,CONTROL + LSLS R3,#31 + IT EQ + BXEQ R12 + SVC 0 + BX LR + + .fnend + .size _alloc_box, .-_alloc_box + + +/*--------------------------- _free_box -------------------------------------*/ + +# int _free_box (void *box_mem, void *box); + /* Function wrapper for Unprivileged/Privileged mode. */ + + .thumb_func + .type _free_box, %function + .global _free_box +_free_box: + .fnstart + .cantunwind + + LDR R12,=rt_free_box + MRS R3,IPSR + LSLS R3,#24 + IT NE + BXNE R12 + MRS R3,CONTROL + LSLS R3,#31 + IT EQ + BXEQ R12 + SVC 0 + BX LR + + .fnend + .size _free_box, .-_free_box + + +/*-------------------------- SVC_Handler ------------------------------------*/ + +# void SVC_Handler (void); + + .thumb_func + .type SVC_Handler, %function + .global SVC_Handler +SVC_Handler: + .ifdef IFX_XMC4XXX + .global SVC_Handler_Veneer +SVC_Handler_Veneer: + .endif + .fnstart + .cantunwind + + MRS R0,PSP /* Read PSP */ + LDR R1,[R0,#24] /* Read Saved PC from Stack */ + LDRB R1,[R1,#-2] /* Load SVC Number */ + CBNZ R1,SVC_User + + LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */ + PUSH {R4,LR} /* Save EXC_RETURN */ + BLX R12 /* Call SVC Function */ + POP {R4,LR} /* Restore EXC_RETURN */ + + MRS R12,PSP /* Read PSP */ + STM R12,{R0-R2} /* Store return values */ + + LDR R3,=os_tsk + LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */ + CMP R1,R2 + .ifdef IFX_XMC4XXX + ITT EQ + PUSHEQ {LR} + POPEQ {PC} + .else + IT EQ + BXEQ LR /* RETI, no task switch */ + .endif + + CBZ R1,SVC_Next /* Runtask deleted? */ + TST LR,#0x10 /* is it extended frame? */ + ITTE EQ + VSTMDBEQ R12!,{S16-S31} /* yes, stack also VFP hi-regs */ + MOVEQ R0,#0x01 /* os_tsk->stack_frame val */ + MOVNE R0,#0x00 + STRB R0,[R1,#TCB_STACKF] /* os_tsk.run->stack_frame = val */ + STMDB R12!,{R4-R11} /* Save Old context */ + STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */ + + PUSH {R2,R3} + BL rt_stk_check /* Check for Stack overflow */ + POP {R2,R3} + +SVC_Next: + STR R2,[R3] /* os_tsk.run = os_tsk.new */ + + LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */ + LDMIA R12!,{R4-R11} /* Restore New Context */ + LDRB R0,[R2,#TCB_STACKF] /* Stack Frame */ + CMP R0,#0 /* Basic/Extended Stack Frame */ + ITTE NE + VLDMIANE R12!,{S16-S31} /* restore VFP hi-registers */ + MVNNE LR,#~0xFFFFFFED /* set EXC_RETURN value */ + MVNEQ LR,#~0xFFFFFFFD + MSR PSP,R12 /* Write PSP */ + +SVC_Exit: + .ifdef IFX_XMC4XXX + PUSH {LR} + POP {PC} + .else + BX LR + .endif + + /*------------------- User SVC ------------------------------*/ + +SVC_User: + PUSH {R4,LR} /* Save Registers */ + LDR R2,=SVC_Count + LDR R2,[R2] + CMP R1,R2 + BHI SVC_Done /* Overflow */ + + LDR R4,=SVC_Table-4 + LDR R4,[R4,R1,LSL #2] /* Load SVC Function Address */ + + LDM R0,{R0-R3,R12} /* Read R0-R3,R12 from stack */ + BLX R4 /* Call SVC Function */ + + MRS R12,PSP + STM R12,{R0-R3} /* Function return values */ +SVC_Done: + POP {R4,PC} /* RETI */ + + .fnend + .size SVC_Handler, .-SVC_Handler + + +/*-------------------------- PendSV_Handler ---------------------------------*/ + +# void PendSV_Handler (void); + + .thumb_func + .type PendSV_Handler, %function + .global PendSV_Handler + .global Sys_Switch +PendSV_Handler: + .ifdef IFX_XMC4XXX + .global PendSV_Handler_Veneer +PendSV_Handler_Veneer: + .endif + .fnstart + .cantunwind + + PUSH {R4,LR} /* Save EXC_RETURN */ + BL rt_pop_req + +Sys_Switch: + POP {R4,LR} /* Restore EXC_RETURN */ + + LDR R3,=os_tsk + LDM R3,{R1,R2} /* os_tsk.run, os_tsk.new */ + CMP R1,R2 + .ifdef IFX_XMC4XXX + ITT EQ + PUSHEQ {LR} + POPEQ {PC} + .else + IT EQ + BXEQ LR /* RETI, no task switch */ + .endif + + MRS R12,PSP /* Read PSP */ + TST LR,#0x10 /* is it extended frame? */ + ITTE EQ + VSTMDBEQ R12!,{S16-S31} /* yes, stack also VFP hi-regs */ + MOVEQ R0,#0x01 /* os_tsk->stack_frame val */ + MOVNE R0,#0x00 + STRB R0,[R1,#TCB_STACKF] /* os_tsk.run->stack_frame = val */ + STMDB R12!,{R4-R11} /* Save Old context */ + STR R12,[R1,#TCB_TSTACK] /* Update os_tsk.run->tsk_stack */ + + PUSH {R2,R3} + BL rt_stk_check /* Check for Stack overflow */ + POP {R2,R3} + + STR R2,[R3] /* os_tsk.run = os_tsk.new */ + + LDR R12,[R2,#TCB_TSTACK] /* os_tsk.new->tsk_stack */ + LDMIA R12!,{R4-R11} /* Restore New Context */ + LDRB R0,[R2,#TCB_STACKF] /* Stack Frame */ + CMP R0,#0 /* Basic/Extended Stack Frame */ + ITTE NE + VLDMIANE R12!,{S16-S31} /* restore VFP hi-registers */ + MVNNE LR,#~0xFFFFFFED /* set EXC_RETURN value */ + MVNEQ LR,#~0xFFFFFFFD + MSR PSP,R12 /* Write PSP */ + +Sys_Exit: + .ifdef IFX_XMC4XXX + PUSH {LR} + POP {PC} + .else + BX LR /* Return to Thread Mode */ + .endif + + .fnend + .size PendSV_Handler, .-PendSV_Handler + + +/*-------------------------- SysTick_Handler --------------------------------*/ + +# void SysTick_Handler (void); + + .thumb_func + .type SysTick_Handler, %function + .global SysTick_Handler +SysTick_Handler: + .ifdef IFX_XMC4XXX + .global SysTick_Handler_Veneer +SysTick_Handler_Veneer: + .endif + .fnstart + .cantunwind + + PUSH {R4,LR} /* Save EXC_RETURN */ + BL rt_systick + B Sys_Switch + + .fnend + .size SysTick_Handler, .-SysTick_Handler + + +/*-------------------------- OS_Tick_Handler --------------------------------*/ + +# void OS_Tick_Handler (void); + + .thumb_func + .type OS_Tick_Handler, %function + .global OS_Tick_Handler +OS_Tick_Handler: + .fnstart + .cantunwind + + PUSH {R4,LR} /* Save EXC_RETURN */ + BL os_tick_irqack + BL rt_systick + B Sys_Switch + + .fnend + .size OS_Tick_Handler, .-OS_Tick_Handler + + + .end + +/*---------------------------------------------------------------------------- + * end of file + *---------------------------------------------------------------------------*/