2013-07-17 13:37:31 +08:00
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/*
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2013-07-17 18:42:19 +08:00
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* File : context_gcc.S
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2013-07-17 13:37:31 +08:00
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* This file is part of RT-Thread RTOS
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2013-07-17 18:42:19 +08:00
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* COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
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2013-07-17 13:37:31 +08:00
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*
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2013-07-17 18:42:19 +08:00
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2013-07-17 13:37:31 +08:00
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*
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* Change Logs:
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* Date Author Notes
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2013-07-17 18:42:19 +08:00
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* 2013-7-14 Peng Fan sep6200 implementation
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2013-07-17 13:37:31 +08:00
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*/
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2013-07-17 18:42:19 +08:00
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/**
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2013-07-17 13:37:31 +08:00
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* \addtogroup sep6200
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*/
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2013-07-17 18:42:19 +08:00
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2013-07-17 13:37:31 +08:00
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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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