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port rt-thread to M16C
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@619 bbd45198-f89e-11dd-88c7-29a3b14d5316
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117
libcpu/m16c/context.asm
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117
libcpu/m16c/context.asm
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/*
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* File : context.asm
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-04-09 fify the first version
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*
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* For : Renesas M16C
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* Toolchain : IAR's EW for M16C v3.401
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*/
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;********************************************************************************************************
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; PUBLIC FUNCTIONS
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;********************************************************************************************************
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RSEG CSTACK
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RSEG ISTACK
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RSEG CODE(1)
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EXTERN rt_thread_switch_interrput_flag
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EXTERN rt_interrupt_from_thread
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EXTERN rt_interrupt_to_thread
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EXTERN rt_interrupt_enter
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EXTERN rt_tick_increase
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EXTERN rt_interrupt_leave
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EXTERN u0rec_handler
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PUBLIC rt_hw_interrupt_disable
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PUBLIC rt_hw_interrupt_enable
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PUBLIC rt_hw_context_switch_to
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PUBLIC rt_hw_context_switch
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PUBLIC rt_hw_context_switch_interrupt
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PUBLIC rt_hw_timer_handler
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PUBLIC rt_hw_uart0_receive_handler
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rt_hw_interrupt_disable
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FCLR I
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RTS
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rt_hw_interrupt_enable
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FSET I
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RTS
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;/*
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; * void rt_hw_context_switch_to(rt_uint32 to);
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; * r0 --> to
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; * this fucntion is used to perform the first thread switch
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; */
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rt_hw_context_switch_to
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MOV.W R0, A0
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LDC [A0], ISP
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POPM R0,R1,R2,R3,A0,A1,SB,FB
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REIT
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rt_hw_context_switch
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PUSHM R0,R1,R2,R3,A0,A1,SB,FB
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MOV.W R0, A0
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STC ISP, [A0]
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MOV.W R1, A0
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LDC [A0], ISP
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POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack
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REIT
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rt_hw_context_switch_interrupt
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CMP.W #1,rt_thread_switch_interrput_flag
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JEQ jump
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MOV.W #1,rt_thread_switch_interrput_flag
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MOV.W R0, rt_interrupt_from_thread
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jump
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MOV.W R1, rt_interrupt_to_thread
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RTS
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rt_hw_context_switch_interrupt_do
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MOV.W #0, rt_thread_switch_interrput_flag
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MOV.W rt_interrupt_from_thread, A0
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STC ISP, [A0]
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MOV.W rt_interrupt_to_thread, A0
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LDC [A0], ISP
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POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack
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RTS ; Normal return
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.EVEN
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rt_hw_timer_handler:
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PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers
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JSR rt_interrupt_enter
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JSR rt_tick_increase
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JSR rt_interrupt_leave
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CMP.W #1,rt_thread_switch_interrput_flag
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JEQ rt_hw_context_switch_interrupt_do
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POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack
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REIT ; Return from interrup
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.EVEN
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rt_hw_uart0_receive_handler:
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PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers
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JSR rt_interrupt_enter
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JSR u0rec_handler
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JSR rt_interrupt_leave
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CMP.W #1, rt_thread_switch_interrput_flag
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JEQ rt_hw_context_switch_interrupt_do
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POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack
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REIT ; Return from interrup
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END
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22
libcpu/m16c/interrupt.c
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22
libcpu/m16c/interrupt.c
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/*
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* File : interrupt.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-04-09 fify the first version
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*
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* For : Renesas M16C
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* Toolchain : IAR's EW for M16C v3.401
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*/
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#include <rtthread.h>
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rt_uint16_t rt_interrupt_from_thread;
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rt_uint16_t rt_interrupt_to_thread;
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rt_uint16_t rt_thread_switch_interrput_flag;
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59
libcpu/m16c/stack.c
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59
libcpu/m16c/stack.c
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/*
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* File : stack.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-04-09 fify the first version
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*
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* For : Renesas M16C
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* Toolchain : IAR's EW for M16C v3.401
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*/
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#include <rtthread.h>
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/**
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* This function will initialize thread stack
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*
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* @param tentry the entry of thread
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* @param parameter the parameter of entry
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* @param stack_addr the beginning stack address
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* @param texit the function will be called when thread exit
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*
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* @return stack address
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*/
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rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
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rt_uint8_t *stack_addr, void *texit)
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{
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rt_uint16_t *pstk16;
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rt_uint16_t flag;
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flag = 0x0040;
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pstk16 = (rt_uint16_t *)stack_addr;
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pstk16--;
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/* Simulate ISR entry */
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*pstk16-- = (flag & 0x00FF) /* ... The lowest byte of the FLAG register */
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| (((rt_uint32_t)tentry >> 8) & 0x00000F00) /* ... The highest nibble of the PC register */
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| ((flag << 4) & 0xF000); /* ... The highest nibble of the FLAG register */
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*pstk16-- = (((rt_uint32_t)tentry ) & 0x0000FFFF); /* ... The lowest bytes of the PC register */
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/* Save registers onto stack frame */
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*pstk16-- = (rt_uint16_t)0xFBFB; /* ... FB register */
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*pstk16-- = (rt_uint16_t)0x3B3B; /* ... SB register */
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*pstk16-- = (rt_uint16_t)0xA1A1; /* ... A1 register */
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*pstk16-- = (rt_uint16_t)0xA0A0; /* ... A0 register */
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*pstk16-- = (rt_uint16_t)0x3333; /* ... R3 register */
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*pstk16-- = (rt_uint32_t)parameter >> 16L; /* ... Pass argument in R2 register */
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*pstk16-- = (rt_uint32_t)parameter & 0x0000FFFFL; /* ... Pass argument in R1 register */
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*pstk16 = (rt_uint16_t)0x0000; /* ... R0 register */
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/* return task's current stack address */
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return (rt_uint8_t *)pstk16;
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}
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