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port rt-thread to M16C

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@619 bbd45198-f89e-11dd-88c7-29a3b14d5316
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dzzxzz 2010-04-14 00:21:14 +00:00
parent 190324c7a6
commit 02564df01e
3 changed files with 198 additions and 0 deletions
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117
libcpu/m16c/context.asm Normal file
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/*
* File : context.asm
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-04-09 fify the first version
*
* For : Renesas M16C
* Toolchain : IAR's EW for M16C v3.401
*/
;********************************************************************************************************
; PUBLIC FUNCTIONS
;********************************************************************************************************
RSEG CSTACK
RSEG ISTACK
RSEG CODE(1)
EXTERN rt_thread_switch_interrput_flag
EXTERN rt_interrupt_from_thread
EXTERN rt_interrupt_to_thread
EXTERN rt_interrupt_enter
EXTERN rt_tick_increase
EXTERN rt_interrupt_leave
EXTERN u0rec_handler
PUBLIC rt_hw_interrupt_disable
PUBLIC rt_hw_interrupt_enable
PUBLIC rt_hw_context_switch_to
PUBLIC rt_hw_context_switch
PUBLIC rt_hw_context_switch_interrupt
PUBLIC rt_hw_timer_handler
PUBLIC rt_hw_uart0_receive_handler
rt_hw_interrupt_disable
FCLR I
RTS
rt_hw_interrupt_enable
FSET I
RTS
;/*
; * void rt_hw_context_switch_to(rt_uint32 to);
; * r0 --> to
; * this fucntion is used to perform the first thread switch
; */
rt_hw_context_switch_to
MOV.W R0, A0
LDC [A0], ISP
POPM R0,R1,R2,R3,A0,A1,SB,FB
REIT
rt_hw_context_switch
PUSHM R0,R1,R2,R3,A0,A1,SB,FB
MOV.W R0, A0
STC ISP, [A0]
MOV.W R1, A0
LDC [A0], ISP
POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack
REIT
rt_hw_context_switch_interrupt
CMP.W #1,rt_thread_switch_interrput_flag
JEQ jump
MOV.W #1,rt_thread_switch_interrput_flag
MOV.W R0, rt_interrupt_from_thread
jump
MOV.W R1, rt_interrupt_to_thread
RTS
rt_hw_context_switch_interrupt_do
MOV.W #0, rt_thread_switch_interrput_flag
MOV.W rt_interrupt_from_thread, A0
STC ISP, [A0]
MOV.W rt_interrupt_to_thread, A0
LDC [A0], ISP
POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore all processor registers from the new task's stack
RTS ; Normal return
.EVEN
rt_hw_timer_handler:
PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers
JSR rt_interrupt_enter
JSR rt_tick_increase
JSR rt_interrupt_leave
CMP.W #1,rt_thread_switch_interrput_flag
JEQ rt_hw_context_switch_interrupt_do
POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack
REIT ; Return from interrup
.EVEN
rt_hw_uart0_receive_handler:
PUSHM R0,R1,R2,R3,A0,A1,SB,FB ; Save current task's registers
JSR rt_interrupt_enter
JSR u0rec_handler
JSR rt_interrupt_leave
CMP.W #1, rt_thread_switch_interrput_flag
JEQ rt_hw_context_switch_interrupt_do
POPM R0,R1,R2,R3,A0,A1,SB,FB ; Restore registers from the new task's stack
REIT ; Return from interrup
END

22
libcpu/m16c/interrupt.c Normal file
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/*
* File : interrupt.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-04-09 fify the first version
*
* For : Renesas M16C
* Toolchain : IAR's EW for M16C v3.401
*/
#include <rtthread.h>
rt_uint16_t rt_interrupt_from_thread;
rt_uint16_t rt_interrupt_to_thread;
rt_uint16_t rt_thread_switch_interrput_flag;

59
libcpu/m16c/stack.c Normal file
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/*
* File : stack.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-04-09 fify the first version
*
* For : Renesas M16C
* Toolchain : IAR's EW for M16C v3.401
*/
#include <rtthread.h>
/**
* This function will initialize thread stack
*
* @param tentry the entry of thread
* @param parameter the parameter of entry
* @param stack_addr the beginning stack address
* @param texit the function will be called when thread exit
*
* @return stack address
*/
rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
rt_uint8_t *stack_addr, void *texit)
{
rt_uint16_t *pstk16;
rt_uint16_t flag;
flag = 0x0040;
pstk16 = (rt_uint16_t *)stack_addr;
pstk16--;
/* Simulate ISR entry */
*pstk16-- = (flag & 0x00FF) /* ... The lowest byte of the FLAG register */
| (((rt_uint32_t)tentry >> 8) & 0x00000F00) /* ... The highest nibble of the PC register */
| ((flag << 4) & 0xF000); /* ... The highest nibble of the FLAG register */
*pstk16-- = (((rt_uint32_t)tentry ) & 0x0000FFFF); /* ... The lowest bytes of the PC register */
/* Save registers onto stack frame */
*pstk16-- = (rt_uint16_t)0xFBFB; /* ... FB register */
*pstk16-- = (rt_uint16_t)0x3B3B; /* ... SB register */
*pstk16-- = (rt_uint16_t)0xA1A1; /* ... A1 register */
*pstk16-- = (rt_uint16_t)0xA0A0; /* ... A0 register */
*pstk16-- = (rt_uint16_t)0x3333; /* ... R3 register */
*pstk16-- = (rt_uint32_t)parameter >> 16L; /* ... Pass argument in R2 register */
*pstk16-- = (rt_uint32_t)parameter & 0x0000FFFFL; /* ... Pass argument in R1 register */
*pstk16 = (rt_uint16_t)0x0000; /* ... R0 register */
/* return task's current stack address */
return (rt_uint8_t *)pstk16;
}