lib: Add common semihosting library
We factor out the arch-independent parts of the ARM semihosting
implementation as a common library so that it can be shared
with RISC-V.
Signed-off-by: Kautuk Consul <kconsul@ventanamicro.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/include/semihosting.h b/include/semihosting.h
index f1f7346..4e844cb 100644
--- a/include/semihosting.h
+++ b/include/semihosting.h
@@ -17,6 +17,17 @@
#define SMH_T32_SVC 0xDFAB
#define SMH_T32_HLT 0xBABC
+/**
+ * smh_trap() - ARCH-specific semihosting call.
+ *
+ * Semihosting library/driver can use this function to do the
+ * actual semihosting calls.
+ *
+ * Return: Error code defined by semihosting spec.
+ */
+
+long smh_trap(unsigned int sysnum, void *addr);
+
#if CONFIG_IS_ENABLED(SEMIHOSTING_FALLBACK)
/**
* semihosting_enabled() - Determine whether semihosting is supported