2018-06-05 11:33:49 +08:00
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/*
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2021-03-24 15:46:51 +08:00
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* Copyright (c) 2006-2021, RT-Thread Development Team
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2018-06-05 11:33:49 +08:00
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*
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2021-03-24 15:46:51 +08:00
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* SPDX-License-Identifier: Apache-2.0
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2018-06-05 11:33:49 +08:00
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*
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* Change Logs:
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* Date Author Notes
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* 2017-01-01 Urey first version
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* 2018-06-05 tanek clean code
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*/
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.file "contex_ck802.S"
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#undef VIC_TSPDR
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#define VIC_TSPDR 0XE000EC08
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.global rt_thread_switch_interrupt_flag
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.global rt_interrupt_from_thread
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.global rt_interrupt_to_thread
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.text
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.align 2
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/*
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* rt_base_t rt_hw_interrupt_disable(void);
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*/
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.global 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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mfcr r0, psr
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psrclr ie
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rts
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/*
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* void rt_hw_interrupt_enable(rt_base_t psr);
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*/
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.global rt_hw_interrupt_enable
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.type rt_hw_interrupt_enable, %function
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rt_hw_interrupt_enable:
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mtcr r0, psr
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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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*/
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.global rt_hw_context_switch_to
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.type rt_hw_context_switch_to, %function
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rt_hw_context_switch_to:
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lrw r2, rt_interrupt_to_thread
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stw r0, (r2)
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/* set form thread = 0 */
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lrw r2, rt_interrupt_from_thread
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movi r0, 0
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stw r0, (r2)
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psrclr ie
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jbr __tspend_handler_nosave
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/*
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* void rt_hw_context_switch_interrupt(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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.global rt_hw_context_switch_interrupt
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.type rt_hw_context_switch_interrupt, %function
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rt_hw_context_switch_interrupt:
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lrw r2, rt_interrupt_from_thread /* set rt_interrupt_from_thread */
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stw r0, (r2)
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lrw r2, rt_interrupt_to_thread /* set rt_interrupt_to_thread */
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stw r1, (r2)
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lrw r0, VIC_TSPDR
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bgeni r1, 0
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stw r1, (r0)
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rts
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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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.global rt_hw_context_switch
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.type rt_hw_context_switch, %function
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rt_hw_context_switch:
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lrw r2, rt_interrupt_from_thread /* set rt_interrupt_from_thread */
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stw r0, (r2)
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lrw r2, rt_interrupt_to_thread /* set rt_interrupt_to_thread */
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stw r1, (r2)
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lrw r0, VIC_TSPDR
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bgeni r1, 0
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stw r1, (r0)
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rts
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.global PendSV_Handler
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.type PendSV_Handler, %function
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PendSV_Handler:
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subi sp, 68
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stm r0-r13, (sp)
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stw r15, (sp, 56)
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mfcr r0, epsr
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stw r0, (sp, 60)
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mfcr r0, epc
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stw r0, (sp, 64)
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lrw r0, rt_interrupt_from_thread
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ldw r1, (r0)
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stw sp, (r1)
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__tspend_handler_nosave:
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lrw r6, rt_interrupt_to_thread
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lrw r7, rt_interrupt_from_thread
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ldw r8, (r6)
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stw r8, (r7)
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ldw sp, (r8)
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#ifdef CONFIG_STACK_GUARD
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mfcr r3, cr<0, 4>
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bseti r3, 0
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bseti r3, 1
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mtcr r3, cr<0, 4>
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#endif
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ldw r0, (sp, 64)
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mtcr r0, epc
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ldw r0, (sp, 60)
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bseti r0, 6
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mtcr r0, epsr
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ldw r15, (sp, 56)
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ldm r0-r13, (sp)
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addi sp, 68
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rte
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