diff --git a/src/vendorcode/amd/fsp/picasso/include/bl_uapp/bl_syscall_public.h b/src/vendorcode/amd/fsp/picasso/include/bl_uapp/bl_syscall_public.h
index 45ea67e5c4..69ada3490a 100644
--- a/src/vendorcode/amd/fsp/picasso/include/bl_uapp/bl_syscall_public.h
+++ b/src/vendorcode/amd/fsp/picasso/include/bl_uapp/bl_syscall_public.h
@@ -52,6 +52,7 @@
 #define SVC_WRITE_POSTCODE		0x44
 #define SVC_GET_MAX_WORKBUF_SIZE	0x45
 #define SVC_SHA				0x46
+#define SVC_RSAPKCS_VERIFY		0x47
 
 typedef struct _RSAPSS_VERIFY_PARAMS_T
 {
@@ -64,6 +65,17 @@ typedef struct _RSAPSS_VERIFY_PARAMS_T
 	char		*pSig;          // Signature to be verified, same size as ModulusSize
 } RSAPSS_VERIFY_PARAMS;
 
+typedef struct RSAPKCS_VERIFY_PARAMS_T
+{
+	char		*pHash;         // Message digest to verify the RSA signature
+	unsigned int	HashLen;        // hash length in bytes
+	char		*pModulus;      // Modulus address
+	unsigned int	ModulusSize;    // Modulus length in bytes
+	char		*pExponent;     // Exponent address
+	unsigned int	ExpSize;        // Exponent length in bytes
+	char		*pSig;          // Signature to be verified, same size as ModulusSize
+} RSAPKCS_VERIFY_PARAMS;
+
 typedef enum _PSP_BOOT_MODE
 {
 	PSP_BOOT_MODE_S0 = 0x0,
@@ -347,7 +359,8 @@ uint32_t svc_get_max_workbuf_size(uint32_t *size);
  */
 uint32_t svc_crypto_sha(SHA_GENERIC_DATA *sha_op, SHA_OPERATION_MODE sha_mode);
 
-/* RSA PSS Verification of signature and data
+/*
+ * RSA PSS Verification of signature and data
  *
  * Parameters:
  *     RSAPSS_VERIFY_PARAMS   -   Pointer to RSA PSS parameters
@@ -356,6 +369,16 @@ uint32_t svc_crypto_sha(SHA_GENERIC_DATA *sha_op, SHA_OPERATION_MODE sha_mode);
  */
 uint32_t svc_rsa_pss_verify(const RSAPSS_VERIFY_PARAMS *params);
 
+/*
+ * RSA PKCS Verification of signature and data
+ *
+ * Parameters:
+ *     RSAPKCS_VERIFY_PARAMS   -   Pointer to RSA PKCS parameters
+ *
+ * Return value: BL_OK or error code
+ */
+uint32_t svc_rsa_pkcs_verify(const RSAPKCS_VERIFY_PARAMS *params);
+
 /* C entry point for the Bootloader Userspace Application */
 void Main(void);