no1wudi commented on a change in pull request #5758:
URL: https://github.com/apache/incubator-nuttx/pull/5758#discussion_r828623848
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File path: arch/risc-v/src/common/riscv_internal.h
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@@ -253,6 +253,19 @@ void riscv_cpu_boot(int cpu);
int riscv_pause_handler(int irq, void *c, void *arg);
#endif
+/****************************************************************************
+ * Name: riscv_mhartid
+ *
+ * Description:
+ * Context aware way to query hart id
+ *
+ * Returned Value:
+ * Hart id
+ *
+ ****************************************************************************/
+
+uint64_t riscv_mhartid(void);
Review comment:
How about extend existing up_cpu_index to support S-mode instead of a
new function ?
```
/* In riscv_cpuindex.c */
int up_cpu_index(void)
{
int mhartid;
asm volatile ("csrr %0, mhartid": "=r" (mhartid));
return mhartid;
}
```
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