67 lines
1.7 KiB
ArmAsm
67 lines
1.7 KiB
ArmAsm
/*
|
|
* 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
|
|
* 2010-04-19 fify rewrite rt_hw_interrupt_disable/enable fuction
|
|
* 2010-04-20 fify move peripheral ISR to bsp/interrupts.s34
|
|
*
|
|
* For : Renesas M16C
|
|
* Toolchain : IAR's EW for M16C v3.401
|
|
*/
|
|
|
|
RSEG CSTACK
|
|
|
|
RSEG ISTACK
|
|
|
|
RSEG CODE(1)
|
|
|
|
EXTERN rt_interrupt_from_thread
|
|
EXTERN rt_interrupt_to_thread
|
|
|
|
PUBLIC rt_hw_interrupt_disable
|
|
PUBLIC rt_hw_interrupt_enable
|
|
PUBLIC rt_hw_context_switch_to
|
|
PUBLIC os_context_switch
|
|
|
|
rt_hw_interrupt_disable:
|
|
STC FLG, R0 ;fify 20100419
|
|
FCLR I
|
|
RTS
|
|
|
|
rt_hw_interrupt_enable:
|
|
LDC R0, FLG ;fify 20100419
|
|
RTS
|
|
|
|
.EVEN
|
|
os_context_switch:
|
|
PUSHM R0,R1,R2,R3,A0,A1,SB,FB
|
|
|
|
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 registers from the new task's stack
|
|
REIT ; Return from interrup
|
|
|
|
/*
|
|
* 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
|
|
|
|
END
|