zhuyanlinzyl commented on a change in pull request #5261:
URL: https://github.com/apache/incubator-nuttx/pull/5261#discussion_r790644686
##########
File path: arch/xtensa/include/syscall.h
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@@ -41,6 +64,194 @@
* Inline functions
****************************************************************************/
+#ifndef __ASSEMBLY__
+
+/* SVC call with SYS_ call number and no parameters */
+
+static inline uintptr_t sys_call0(unsigned int nbr)
+{
+ register long reg0 __asm__("a2") = (long)(nbr);
+
+ __asm__ __volatile__
+ (
+ "isync\n"
+ "dsync\n"
+ "esync\n"
+ "memw\n"
+ "movi a3, %1\n"
+ "wsr a3, intset\n"
Review comment:
@Ouss4 Sorry for last relay, We use sw interrupt in level 3, and timer
interrupt in level2.
Yes. A bit confused here, as I first want to use syscall, So I fixed
syscall handler error, but found I can't use it later.
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