105 lines
2.4 KiB
ArmAsm
105 lines
2.4 KiB
ArmAsm
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/*
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* File : context.S
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, 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://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2013-7-14 Peng Fan First implementation
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*/
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/*!
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* \addtogroup sep6200
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*/
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/*@{*/
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#define NOINT 0xc0
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/*
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* rt_base_t rt_hw_interrupt_disable();
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*/
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.globl rt_hw_interrupt_disable
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.type rt_hw_interrupt_disable, %function
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rt_hw_interrupt_disable:
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stw.w r1, [sp-], #4
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mov r0, asr
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or r1, r0, #NOINT
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mov.a asr, r1
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ldw.w r1, [sp]+, #4
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mov pc, lr
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/*
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* void rt_hw_interrupt_enable(rt_base_t level);
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*/
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.globl rt_hw_interrupt_enable
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.type rt_hw_interrupt_disable, %function
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rt_hw_interrupt_enable:
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mov.a asr, r0
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mov pc, lr
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/*
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* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
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* r0 --> from
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* r1 --> to
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*/
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.globl rt_hw_context_switch
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.type rt_hw_interrupt_disable, %function
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rt_hw_context_switch:
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stm.w (lr), [sp-]
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stm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr), [sp-]
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stm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp-]
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mov r4, asr
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stm.w (r4), [sp-]
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mov r4, bsr
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stm.w (r4), [sp-]
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stw sp, [r0+]
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ldw sp, [r1+]
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ldm.w (r4), [sp]+
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mov.a bsr,r4
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ldm.w (r4), [sp]+
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mov.a asr, r4
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ldm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp]+
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ldm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr, pc), [sp]+
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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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*/
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.globl rt_hw_context_switch_to
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rt_hw_context_switch_to:
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ldw sp, [r0+]
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ldm.w (r4), [sp]+
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mov.a bsr, r4
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ldm.w (r4), [sp]+
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mov.a asr, r4
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ldm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp]+
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ldm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr, pc), [sp]+
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/*
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* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
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*/
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.globl rt_thread_switch_interrupt_flag
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.globl rt_interrupt_from_thread
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.globl rt_interrupt_to_thread
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.globl rt_hw_context_switch_interrupt
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rt_hw_context_switch_interrupt:
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ldw r2, =rt_thread_switch_interrupt_flag
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ldw r3, [r2+]
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cmpsub.a r3, #1
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beq _reswitch
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mov r3, #1
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stw r3, [r2+]
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ldw r2, =rt_interrupt_from_thread
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stw r0, [r2+]
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_reswitch:
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ldw r2, =rt_interrupt_to_thread
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stw r1, [r2+]
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mov pc, lr
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