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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-01-01 Urey first version
* 2018-06-05 tanek clean code
*/
.file "contex_ck802.S"
#undef VIC_TSPDR
#define VIC_TSPDR 0XE000EC08
.global rt_thread_switch_interrupt_flag
.global rt_interrupt_from_thread
.global rt_interrupt_to_thread
.text
.align 2
/*
* rt_base_t rt_hw_interrupt_disable(void);
*/
.global rt_hw_interrupt_disable
.type rt_hw_interrupt_disable, %function
rt_hw_interrupt_disable:
mfcr r0, psr
psrclr ie
rts
/*
* void rt_hw_interrupt_enable(rt_base_t psr);
*/
.global rt_hw_interrupt_enable
.type rt_hw_interrupt_enable, %function
rt_hw_interrupt_enable:
mtcr r0, psr
rts
/*
* void rt_hw_context_switch_to(rt_uint32 to);
* R0 --> to
*/
.global rt_hw_context_switch_to
.type rt_hw_context_switch_to, %function
rt_hw_context_switch_to:
lrw r2, rt_interrupt_to_thread
stw r0, (r2)
/* set form thread = 0 */
lrw r2, rt_interrupt_from_thread
movi r0, 0
stw r0, (r2)
psrclr ie
jbr __tspend_handler_nosave
/*
* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
* r0 --> from
* r1 --> to
*/
.global rt_hw_context_switch_interrupt
.type rt_hw_context_switch_interrupt, %function
rt_hw_context_switch_interrupt:
lrw r2, rt_interrupt_from_thread /* set rt_interrupt_from_thread */
stw r0, (r2)
lrw r2, rt_interrupt_to_thread /* set rt_interrupt_to_thread */
stw r1, (r2)
lrw r0, VIC_TSPDR
bgeni r1, 0
stw r1, (r0)
rts
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to)
* r0 --> from
* r1 --> to
*/
.global rt_hw_context_switch
.type rt_hw_context_switch, %function
rt_hw_context_switch:
lrw r2, rt_interrupt_from_thread /* set rt_interrupt_from_thread */
stw r0, (r2)
lrw r2, rt_interrupt_to_thread /* set rt_interrupt_to_thread */
stw r1, (r2)
lrw r0, VIC_TSPDR
bgeni r1, 0
stw r1, (r0)
rts
.global PendSV_Handler
.type PendSV_Handler, %function
PendSV_Handler:
subi sp, 68
stm r0-r13, (sp)
stw r15, (sp, 56)
mfcr r0, epsr
stw r0, (sp, 60)
mfcr r0, epc
stw r0, (sp, 64)
lrw r0, rt_interrupt_from_thread
ldw r1, (r0)
stw sp, (r1)
__tspend_handler_nosave:
lrw r6, rt_interrupt_to_thread
lrw r7, rt_interrupt_from_thread
ldw r8, (r6)
stw r8, (r7)
ldw sp, (r8)
#ifdef CONFIG_STACK_GUARD
mfcr r3, cr<0, 4>
bseti r3, 0
bseti r3, 1
mtcr r3, cr<0, 4>
#endif
ldw r0, (sp, 64)
mtcr r0, epc
ldw r0, (sp, 60)
bseti r0, 6
mtcr r0, epsr
ldw r15, (sp, 56)
ldm r0-r13, (sp)
addi sp, 68
rte
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