context_gcc.S
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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2013-7-14 Peng Fan sep6200 implementation
*/
/**
* \addtogroup sep6200
*/
/*@{*/
#define NOINT 0xc0
/*
* rt_base_t rt_hw_interrupt_disable();
*/
.globl rt_hw_interrupt_disable
.type rt_hw_interrupt_disable, %function
rt_hw_interrupt_disable:
stw.w r1, [sp-], #4
mov r0, asr
or r1, r0, #NOINT
mov.a asr, r1
ldw.w r1, [sp]+, #4
mov pc, lr
/*
* void rt_hw_interrupt_enable(rt_base_t level);
*/
.globl rt_hw_interrupt_enable
.type rt_hw_interrupt_disable, %function
rt_hw_interrupt_enable:
mov.a asr, r0
mov pc, lr
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
* r0 --> from
* r1 --> to
*/
.globl rt_hw_context_switch
.type rt_hw_interrupt_disable, %function
rt_hw_context_switch:
stm.w (lr), [sp-]
stm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr), [sp-]
stm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp-]
mov r4, asr
stm.w (r4), [sp-]
mov r4, bsr
stm.w (r4), [sp-]
stw sp, [r0+]
ldw sp, [r1+]
ldm.w (r4), [sp]+
mov.a bsr,r4
ldm.w (r4), [sp]+
mov.a asr, r4
ldm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp]+
ldm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr, pc), [sp]+
/*
* void rt_hw_context_switch_to(rt_uint32 to);
* r0 --> to
*/
.globl rt_hw_context_switch_to
rt_hw_context_switch_to:
ldw sp, [r0+]
ldm.w (r4), [sp]+
mov.a bsr, r4
ldm.w (r4), [sp]+
mov.a asr, r4
ldm.w (r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp]+
ldm.w (r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr, pc), [sp]+
/*
* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
*/
.globl rt_thread_switch_interrupt_flag
.globl rt_interrupt_from_thread
.globl rt_interrupt_to_thread
.globl rt_hw_context_switch_interrupt
rt_hw_context_switch_interrupt:
ldw r2, =rt_thread_switch_interrupt_flag
ldw r3, [r2+]
cmpsub.a r3, #1
beq _reswitch
mov r3, #1
stw r3, [r2+]
ldw r2, =rt_interrupt_from_thread
stw r0, [r2+]
_reswitch:
ldw r2, =rt_interrupt_to_thread
stw r1, [r2+]
mov pc, lr