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arch/risc-v: Correct comments for current implementations

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Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
This commit is contained in:
Huang Qi 2022-03-28 10:50:56 +08:00 committed by Xiang Xiao
parent 35f9265483
commit 83a5e9958f
3 changed files with 13 additions and 13 deletions
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2
arch/risc-v/include/irq.h
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@ -492,7 +492,7 @@ struct xcptcontext
/* These additional register save locations are used to implement the
* signal delivery trampoline.
*
* REVISIT: Because there is only one copy of these save areas,
* REVISIT: Because there is only a reference of these save areas,
* only a single signal handler can be active. This precludes
* queuing of signal actions. As a result, signals received while
* another signal handler is executing will be ignored!

4
arch/risc-v/src/common/riscv_internal.h
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@ -64,8 +64,8 @@
# define PRIxREG "016" PRIxPTR
#endif
/* In the RISC_V model, the state is copied from the stack to the TCB, but
* only a referenced is passed to get the state from the TCB.
/* In the RISC-V model, the state is saved in stack,
* only a reference stored in TCB.
*/
#ifdef CONFIG_ARCH_FPU

20
arch/risc-v/src/common/riscv_swint.c
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@ -214,8 +214,8 @@ int riscv_swint(int irq, void *context, void *arg)
* A1 = restoreregs
*
* In this case, we simply need to set CURRENT_REGS to restore register
* area referenced in the saved R1. context == CURRENT_REGS is the
* normal exception return. By setting CURRENT_REGS = context[R1], we
* area referenced in the saved A1. context == CURRENT_REGS is the
* normal exception return. By setting CURRENT_REGS = context[A1], we
* force the return to the saved context referenced in $a1.
*/
@ -364,9 +364,9 @@ int riscv_swint(int irq, void *context, void *arg)
*
* At this point, the following values are saved in context:
*
* R0 = SYS_pthread_start
* R1 = entrypt
* R2 = arg
* A0 = SYS_pthread_start
* A1 = entrypt
* A2 = arg
*/
#if !defined(CONFIG_BUILD_FLAT) && !defined(CONFIG_DISABLE_PTHREAD)
@ -396,11 +396,11 @@ int riscv_swint(int irq, void *context, void *arg)
*
* At this point, the following values are saved in context:
*
* R0 = SYS_signal_handler
* R1 = sighand
* R2 = signo
* R3 = info
* R4 = ucontext
* A0 = SYS_signal_handler
* A1 = sighand
* A2 = signo
* A3 = info
* A4 = ucontext
*/
#ifndef CONFIG_BUILD_FLAT