diff options
| author | Bernard Xiong <[email protected]> | 2019-05-09 08:39:08 +0800 |
|---|---|---|
| committer | Bernard Xiong <[email protected]> | 2019-05-09 08:48:38 +0800 |
| commit | d729448f5e84b96eaede631cab5201c21bfe24e1 (patch) | |
| tree | a37a02c07a417961d3ebe2332b6f6032c1e4a539 /libcpu/arm/cortex-a | |
| parent | 21cd524bdba6a8825a5d95ad952985fdef7c1841 (diff) | |
[libcpu][arm/cortex-a] Add correct comments.
Diffstat (limited to 'libcpu/arm/cortex-a')
| -rw-r--r-- | libcpu/arm/cortex-a/context_gcc.S | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/libcpu/arm/cortex-a/context_gcc.S b/libcpu/arm/cortex-a/context_gcc.S index b009630fa8..af5c516e4d 100644 --- a/libcpu/arm/cortex-a/context_gcc.S +++ b/libcpu/arm/cortex-a/context_gcc.S @@ -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 |