rt-thread/libcpu/sparc-v8/bm3803/context_gcc.S

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/*
* Copyright (c) 2020, Shenzhen Academy of Aerospace Technology
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-10-16 Dystopia the first version
*/
#define SPARC_PSR_PIL_MASK 0x00000F00
#define SPARC_PSR_ET_MASK 0x00000020
/*
* rt_base_t rt_hw_interrupt_disable();
*/
.globl rt_hw_interrupt_disable
rt_hw_interrupt_disable:
mov %psr, %o0
or %o0, SPARC_PSR_PIL_MASK, %o1
mov %o1, %psr
nop
nop
nop
retl
nop
/*
* void rt_hw_interrupt_enable(rt_base_t level);
*/
.globl rt_hw_interrupt_enable
rt_hw_interrupt_enable:
mov %o0, %psr
nop
nop
nop
retl
nop
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
* o0 --> from
* o1 --> to
*/
.globl rt_hw_context_switch
rt_hw_context_switch:
ta 2
retl
nop
/*
* void rt_hw_context_switch_to(rt_uint32 to);
* o0 --> to
*/
.globl rt_hw_context_switch_to
rt_hw_context_switch_to:
mov %o0, %o1
ta 3
retl
nop
/*
* 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:
set rt_thread_switch_interrupt_flag, %o2
ld [%o2], %o3
cmp %o3, 1
be _reswitch
nop
mov 1, %o3
st %o3, [%o2]
set rt_interrupt_from_thread, %o2
st %o0, [%o2]
_reswitch:
set rt_interrupt_to_thread, %o2
st %o1, [%o2]
retl
nop