275 lines
8.1 KiB
C
275 lines
8.1 KiB
C
/*----------------------------------------------------------------------------
|
|
* RL-ARM - RTX
|
|
*----------------------------------------------------------------------------
|
|
* Name: HAL_CM3.C
|
|
* Purpose: Hardware Abstraction Layer for Cortex-M3
|
|
* 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.
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
#include "rt_TypeDef.h"
|
|
#include "RTX_Config.h"
|
|
#include "rt_System.h"
|
|
#include "rt_HAL_CM.h"
|
|
#include "rt_Task.h"
|
|
#include "rt_MemBox.h"
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
* Functions
|
|
*---------------------------------------------------------------------------*/
|
|
|
|
|
|
/*--------------------------- rt_set_PSP ------------------------------------*/
|
|
|
|
__asm void rt_set_PSP (U32 stack) {
|
|
MSR PSP,R0
|
|
BX LR
|
|
}
|
|
|
|
|
|
/*--------------------------- rt_get_PSP ------------------------------------*/
|
|
|
|
__asm U32 rt_get_PSP (void) {
|
|
MRS R0,PSP
|
|
BX LR
|
|
}
|
|
|
|
|
|
/*--------------------------- os_set_env ------------------------------------*/
|
|
|
|
__asm void os_set_env (void) {
|
|
/* Switch to Unprivileged/Privileged Thread mode, use PSP. */
|
|
MOV R0,SP ; PSP = MSP
|
|
MSR PSP,R0
|
|
LDR R0,=__cpp(&os_flags)
|
|
LDRB R0,[R0]
|
|
LSLS R0,#31
|
|
MOVNE R0,#0x02 ; Privileged Thread mode, use PSP
|
|
MOVEQ R0,#0x03 ; Unprivileged Thread mode, use PSP
|
|
MSR CONTROL,R0
|
|
BX LR
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*--------------------------- _alloc_box ------------------------------------*/
|
|
|
|
__asm void *_alloc_box (void *box_mem) {
|
|
/* Function wrapper for Unprivileged/Privileged mode. */
|
|
LDR R12,=__cpp(rt_alloc_box)
|
|
MRS R3,IPSR
|
|
LSLS R3,#24
|
|
BXNE R12
|
|
MRS R3,CONTROL
|
|
LSLS R3,#31
|
|
BXEQ R12
|
|
SVC 0
|
|
BX LR
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*--------------------------- _free_box -------------------------------------*/
|
|
|
|
__asm int _free_box (void *box_mem, void *box) {
|
|
/* Function wrapper for Unprivileged/Privileged mode. */
|
|
LDR R12,=__cpp(rt_free_box)
|
|
MRS R3,IPSR
|
|
LSLS R3,#24
|
|
BXNE R12
|
|
MRS R3,CONTROL
|
|
LSLS R3,#31
|
|
BXEQ R12
|
|
SVC 0
|
|
BX LR
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*-------------------------- SVC_Handler ------------------------------------*/
|
|
|
|
__asm void SVC_Handler (void) {
|
|
PRESERVE8
|
|
|
|
IMPORT SVC_Count
|
|
IMPORT SVC_Table
|
|
IMPORT rt_stk_check
|
|
|
|
#ifdef IFX_XMC4XXX
|
|
EXPORT SVC_Handler_Veneer
|
|
SVC_Handler_Veneer
|
|
#endif
|
|
|
|
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
|
|
BLX R12 ; Call SVC Function
|
|
|
|
MRS R12,PSP ; Read PSP
|
|
STM R12,{R0-R2} ; Store return values
|
|
|
|
LDR R3,=__cpp(&os_tsk)
|
|
LDM R3,{R1,R2} ; os_tsk.run, os_tsk.new
|
|
CMP R1,R2
|
|
BEQ SVC_Exit ; no task switch
|
|
|
|
CBZ R1,SVC_Next ; Runtask deleted?
|
|
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
|
|
MSR PSP,R12 ; Write PSP
|
|
|
|
SVC_Exit
|
|
MVN LR,#:NOT:0xFFFFFFFD ; set EXC_RETURN value
|
|
#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
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*-------------------------- PendSV_Handler ---------------------------------*/
|
|
|
|
__asm void PendSV_Handler (void) {
|
|
PRESERVE8
|
|
|
|
#ifdef IFX_XMC4XXX
|
|
EXPORT PendSV_Handler_Veneer
|
|
PendSV_Handler_Veneer
|
|
#endif
|
|
|
|
BL __cpp(rt_pop_req)
|
|
|
|
Sys_Switch
|
|
LDR R3,=__cpp(&os_tsk)
|
|
LDM R3,{R1,R2} ; os_tsk.run, os_tsk.new
|
|
CMP R1,R2
|
|
BEQ Sys_Exit
|
|
|
|
MRS R12,PSP ; Read PSP
|
|
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
|
|
MSR PSP,R12 ; Write PSP
|
|
|
|
Sys_Exit
|
|
MVN LR,#:NOT:0xFFFFFFFD ; set EXC_RETURN value
|
|
#ifdef IFX_XMC4XXX
|
|
PUSH {LR}
|
|
POP {PC}
|
|
#else
|
|
BX LR ; Return to Thread Mode
|
|
#endif
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*-------------------------- SysTick_Handler --------------------------------*/
|
|
|
|
__asm void SysTick_Handler (void) {
|
|
PRESERVE8
|
|
|
|
#ifdef IFX_XMC4XXX
|
|
EXPORT SysTick_Handler_Veneer
|
|
SysTick_Handler_Veneer
|
|
#endif
|
|
|
|
BL __cpp(rt_systick)
|
|
B Sys_Switch
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*-------------------------- OS_Tick_Handler --------------------------------*/
|
|
|
|
__asm void OS_Tick_Handler (void) {
|
|
PRESERVE8
|
|
|
|
BL __cpp(os_tick_irqack)
|
|
BL __cpp(rt_systick)
|
|
B Sys_Switch
|
|
|
|
ALIGN
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
* end of file
|
|
*---------------------------------------------------------------------------*/
|
|
|