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[libcpu][arm/cortex-a] Add correct comments.

This commit is contained in:
Bernard Xiong 2019-05-09 08:39:08 +08:00
parent 21cd524bdb
commit d729448f5e
1 changed files with 8 additions and 6 deletions
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14
libcpu/arm/cortex-a/context_gcc.S
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@ -34,8 +34,9 @@ rt_hw_interrupt_enable:
bx lr
/*
* void rt_hw_context_switch_to(rt_uint32 to);
* r0 --> to
* void rt_hw_context_switch_to(rt_uint32 to, struct rt_thread *to_thread);
* r0 --> to (thread stack)
* r1 --> to_thread
*/
.globl rt_hw_context_switch_to
rt_hw_context_switch_to:
@ -64,9 +65,10 @@ _guest_switch_lvl:
.section .text.isr, "ax"
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
* r0 --> from
* r1 --> to
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to, struct rt_thread *to_thread);
* r0 --> from (from_thread stack)
* r1 --> to (to_thread stack)
* r2 --> to_thread
*/
.globl rt_hw_context_switch
rt_hw_context_switch:
@ -158,7 +160,7 @@ rt_hw_context_switch_interrupt:
bl rt_cpus_lock_status_restore
#ifdef RT_USING_LWP
ldmfd sp, {r13,r14}^ @pop usr_sp usr_lr
ldmfd sp, {r13,r14}^ @pop usr_sp usr_lr
add sp, #8
#endif