252 lines
7.7 KiB
C
252 lines
7.7 KiB
C
/**
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*******************************************************************************
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* @file prot.c
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* @version V1.12
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* @date 2010.03.01
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* @brief Compiler adapter for CooCox CoOS kernel.
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*******************************************************************************
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* @copy
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*
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* INTERNAL FILE,DON'T PUBLIC.
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*
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* <h2><center>© COPYRIGHT 2010 CooCox </center></h2>
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*******************************************************************************
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*/
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/*---------------------------- Include ---------------------------------------*/
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#include <coocox.h>
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//******************************************************************************
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// EQUATES
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//******************************************************************************
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U32 NVIC_INT_CTRL = 0xE000ED04; // Interrupt control state register
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U32 NVIC_PENDSVSET = 0x10000000; // Value to trigger PendSV exception
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U32 INT_EXIT = 0xFFFFFFFC;
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//******************************************************************************
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// PUBLIC FUNCTIONS
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//******************************************************************************
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extern U8 Inc8(U8 *data) ;
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extern U8 Dec8(U8 *data) ;
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extern void SetEnvironment(OS_STK *pstk) __attribute__ ((naked));
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extern void SwitchContext(void) __attribute__ ((naked));
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extern void PendSVC(void) __attribute__ ((naked));
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/**
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******************************************************************************
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* @brief Plus a byte integers and Saved into memory cell
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* @param[in] data byte integers.
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* @param[out] None
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* @retval Returns Original value.
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*
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* @par Description
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* @details This function is called to Plus a byte integers
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* and Saved into memory cell.
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******************************************************************************
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*/
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U8 Inc8 (U8 *data)
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{
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register U8 result = 0;
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__asm volatile
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(
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" PUSH {R1} \n"
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" CPSID I \n"
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" LDRB R1,[%1] \n"
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" ADD R1,#1 \n"
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" STRB R1,[%1] \n"
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" CPSIE I \n"
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" SUB R1,#0x1 \n"
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" MOVS %0,R1 \n"
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" POP {R1} \n"
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:"=r"(result)
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:"r"(data)
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);
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return (result);
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}
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/**
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******************************************************************************
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* @brief Decrease a byte integers and Saved into memory cell
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* @param[in] data byte integers.
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* @param[out] None
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* @retval Returns Original value.
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*
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* @par Description
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* @details This function is called to Decrease a byte integers
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* and Saved into memory cell.
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******************************************************************************
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*/
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U8 Dec8 (U8 *data)
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{
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register U8 result = 0;
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__asm volatile
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(
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" PUSH {R1} \n"
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" CPSID I \n"
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" LDRB R1,[%1] \n"
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" SUB R1,#1 \n"
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" STRB R1,[%1] \n"
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" CPSIE I \n"
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" MOVS %0,R1 \n"
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" POP {R1} \n"
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:"=r"(result)
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:"r"(data)
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);
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return (result);
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}
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/**
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******************************************************************************
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* @brief Set environment for Coocox OS running
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* @param[in] pstk stack pointer
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* @param[out] None
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* @retval None.
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*
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* @par Description
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* @details This function is called to Set environment
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* for Coocox OS running.
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******************************************************************************
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*/
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void SetEnvironment (OS_STK *pstk)
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{
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__asm volatile
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(
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" SUB R0,#28 \n"
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" MSR PSP,R0 \n"
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" BX LR \n"
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);
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}
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/**
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******************************************************************************
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* @brief Do ready work to Switch Context for task change
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* @param[in] None
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* @param[out] None
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* @retval None.
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*
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* @par Description
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* @details This function is called to Do ready work to
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* Switch Context for task change
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******************************************************************************
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*/
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void SwitchContext(void)
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{
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__asm volatile
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(
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" LDR R3,=NVIC_INT_CTRL \n"
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" LDR R3,[R3] \n"
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" LDR R2,=NVIC_PENDSVSET \n"
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" LDR R1,[R2] \n"
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" STR R1, [R3] \n"
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" BX LR \n"
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);
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}
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/**
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******************************************************************************
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* @brief Switch Context for task change
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* @param[in] None
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* @param[out] None
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* @retval None.
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*
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* @par Description
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* @details This function is called to Switch Context for task change.
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******************************************************************************
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*/
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#if CFG_CHIP_TYPE == 2
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void PendSVC(void)
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{
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__asm volatile
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(
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" LDR R3,=TCBRunning \n"
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" LDR R1,[R3] \n" // R1 == running tcb
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" LDR R2,=TCBNext \n"
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" LDR R2,[R2] \n" // R2 == next tcb
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" CMP R1,R2 \n"
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" BEQ exitPendSV \n"
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" MRS R0, PSP \n" // Get PSP point (can not use PUSH,in ISR,SP is MSP )
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" SUB R0,R0,#32 \n"
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" STR R0,[R1] \n" // Save orig PSP
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// Store r4-r11,r0 -= regCnt * 4,r0 is new stack
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// top point (addr h->l r11,r10,...,r5,r4)
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" STMIA R0!,{R4-R7} \n" // Save old context (R4-R7)
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" MOV R4,R8 \n"
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" MOV R5,R9 \n"
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" MOV R6,R10 \n"
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" MOV R7,R11 \n"
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" STMIA R0!,{R4-R7} \n" // Save old context (R8-R11)
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" popStk: \n"
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" STR R2, [R3] \n" // TCBRunning = TCBNext;
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" LDR R0, [R2] \n" // Get SP of task that be switch into.
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" ADD R0,R0,#16 \n"
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" LDMIA R0!,{R4-R7} \n" // Restore new Context (R8-R11)
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" MOV R8,R4 \n"
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" MOV R9,R5 \n"
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" MOV R10,R6 \n"
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" MOV R11,R7 \n"
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" SUB R0,R0,#32 \n"
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" LDMIA R0!,{R4-R7} \n" // Restore new Context (R4-R7)
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" ADD R0,R0,#16 \n"
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" MSR PSP, R0 \n" // Mov new stack point to PSP
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" exitPendSV: \n"
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" LDR R3,=OSSchedLock \n"
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" MOV R0, #0x0 \n"
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" STRB R0, [R3] \n"
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" LDR R3,=INT_EXIT \n"
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" LDR R0, [R3] \n"
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" BX R0 \n" // Exit interrupt
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);
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}
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#endif
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#if CFG_CHIP_TYPE == 1
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void __exc_pendsv(void)
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{
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////////debug block /////////////////////////
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__asm volatile
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(
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" LDR R3,=TCBRunning \n"
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" LDR R1,[R3] \n" // R1 == running tcb
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" LDR R2,=TCBNext \n"
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" LDR R2,[R2] \n" // R2 == next tcb
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" CMP R1,R2 \n"
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" BEQ exitPendSV \n"
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" MRS R0, PSP \n" // Get PSP point (can not use PUSH,in ISR,SP is MSP )
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" STMDB R0!,{R4-R11} \n" // Store r4-r11,r0 -= regCnt * 4,r0 is new stack
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// top point (addr h->l r11,r10,...,r5,r4)
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" STR R0,[R1] \n" // Save orig PSP
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" STR R2, [R3] \n" // TCBRunning = TCBNext;
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" LDR R0, [R2] \n" // Get SP of task that be switch into.
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" LDMIA R0!,{R4-R11} \n" // POP {R4-R11},R0 += regCnt * 4
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" MSR PSP, R0 \n" // Mov new stack point to PSP
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" exitPendSV: \n"
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" LDR R3,=OSSchedLock\n"
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" MOVS R0, #0x0 \n"
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" STRB R0, [R3] \n"
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" ORR LR,LR,#0x04 \n" // Ensure exception return uses process stack
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" BX LR \n" // Exit interrupt
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);
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}
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#endif
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