SPM: Remove remaining SMC interfaces

Also, add a disclaimer to explain that the current implementation of SPM
is a prototype that is going to undergo a lot of rework.

Change-Id: I303c1e61c51d9f286cc599fea565fc9ba5a996bf
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

include/services/spm_svc.h

@@ -7,6 +7,8 @@
 #ifndef SPM_SVC_H
 #define SPM_SVC_H
 
+#if SPM_DEPRECATED
+
 #include <utils_def.h>
 
 #define SPM_VERSION_MAJOR	U(0)
@@ -59,12 +61,16 @@
 #define SPM_DENIED		-3
 #define SPM_NO_MEMORY		-5
 
+#endif /* SPM_DEPRECATED */
+
 #ifndef __ASSEMBLY__
 
 #include <stdint.h>
 
 int32_t spm_setup(void);
 
+#if SPM_DEPRECATED
+
 uint64_t spm_smc_handler(uint32_t smc_fid,
 			 uint64_t x1,
 			 uint64_t x2,
@@ -77,6 +83,8 @@ uint64_t spm_smc_handler(uint32_t smc_fid,
 /* Helper to enter a Secure Partition */
 uint64_t spm_sp_call(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3);
 
+#endif /* SPM_DEPRECATED */
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* SPM_SVC_H */

services/std_svc/spm/README.rst

@@ -0,0 +1,3 @@
+This is a prototype loosely based on the SPCI Alpha and SPRT pre-alpha
+specifications. Any interface / platform API introduced for this is subject to
+change as it evolves.

services/std_svc/spm/spm_main.c

@@ -18,7 +18,6 @@
 #include <smccc_helpers.h>
 #include <spinlock.h>
 #include <string.h>
-#include <spm_svc.h>
 #include <sprt_svc.h>
 #include <utils.h>
 #include <xlat_tables_v2.h>
@@ -356,53 +355,3 @@ int32_t spm_setup(void)
 
 	return 0;
 }
-
-/*******************************************************************************
- * Secure Partition Manager SMC handler.
- ******************************************************************************/
-uint64_t spm_smc_handler(uint32_t smc_fid,
-			 uint64_t x1,
-			 uint64_t x2,
-			 uint64_t x3,
-			 uint64_t x4,
-			 void *cookie,
-			 void *handle,
-			 uint64_t flags)
-{
-	unsigned int ns;
-
-	/* Determine which security state this SMC originated from */
-	ns = is_caller_non_secure(flags);
-
-	if (ns == SMC_FROM_SECURE) {
-
-		/* Handle SMCs from Secure world. */
-
-		assert(handle == cm_get_context(SECURE));
-
-		/* Make next ERET jump to S-EL0 instead of S-EL1. */
-		cm_set_elr_spsr_el3(SECURE, read_elr_el1(), read_spsr_el1());
-
-		switch (smc_fid) {
-
-		case SPM_VERSION_AARCH32:
-			SMC_RET1(handle, SPM_VERSION_COMPILED);
-
-		default:
-			break;
-		}
-	} else {
-
-		/* Handle SMCs from Non-secure world. */
-
-		assert(handle == cm_get_context(NON_SECURE));
-
-		switch (smc_fid) {
-
-		default:
-			break;
-		}
-	}
-
-	SMC_RET1(handle, SMC_UNK);
-}

services/std_svc/std_svc_setup.c

@@ -102,7 +102,7 @@ static uintptr_t std_svc_smc_handler(uint32_t smc_fid,
 		SMC_RET1(handle, ret);
 	}
 
-#if ENABLE_SPM
+#if ENABLE_SPM && SPM_DEPRECATED
 	/*
 	 * Dispatch SPM calls to SPM SMC handler and return its return
 	 * value