opteed: pass device tree pointer in x2

Pass device tree pointer to OP-TEE in x2. bl2 is expected to fill in the
device tree pointer in args.arg3. Passing 0 means that device tree is
unavailable.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

services/spd/opteed/opteed_common.c

@@ -20,7 +20,7 @@
 void opteed_init_optee_ep_state(struct entry_point_info *optee_entry_point,
 				uint32_t rw, uint64_t pc,
 				uint64_t pageable_part, uint64_t mem_limit,
-				optee_context_t *optee_ctx)
+				uint64_t dt_addr, optee_context_t *optee_ctx)
 {
 	uint32_t ep_attr;
 
@@ -54,6 +54,7 @@ void opteed_init_optee_ep_state(struct entry_point_info *optee_entry_point,
 	zeromem(&optee_entry_point->args, sizeof(optee_entry_point->args));
 	optee_entry_point->args.arg0 = pageable_part;
 	optee_entry_point->args.arg1 = mem_limit;
+	optee_entry_point->args.arg2 = dt_addr;
 }
 
 /*******************************************************************************

services/spd/opteed/opteed_main.c

@@ -96,6 +96,7 @@ int32_t opteed_setup(void)
 	uint32_t linear_id;
 	uint64_t opteed_pageable_part;
 	uint64_t opteed_mem_limit;
+	uint64_t dt_addr;
 
 	linear_id = plat_my_core_pos();
 
@@ -120,19 +121,17 @@ int32_t opteed_setup(void)
 	if (!optee_ep_info->pc)
 		return 1;
 
-	/*
-	 * We could inspect the SP image and determine it's execution
-	 * state i.e whether AArch32 or AArch64.
-	 */
 	opteed_rw = optee_ep_info->args.arg0;
 	opteed_pageable_part = optee_ep_info->args.arg1;
 	opteed_mem_limit = optee_ep_info->args.arg2;
+	dt_addr = optee_ep_info->args.arg3;
 
 	opteed_init_optee_ep_state(optee_ep_info,
 				opteed_rw,
 				optee_ep_info->pc,
 				opteed_pageable_part,
 				opteed_mem_limit,
+				dt_addr,
 				&opteed_sp_context[linear_id]);
 
 	/*

services/spd/opteed/opteed_pm.c

@@ -99,7 +99,7 @@ static void opteed_cpu_on_finish_handler(uint64_t unused)
 
 	opteed_init_optee_ep_state(&optee_on_entrypoint, opteed_rw,
 				(uint64_t)&optee_vectors->cpu_on_entry,
-				0, 0, optee_ctx);
+				0, 0, 0, optee_ctx);
 
 	/* Initialise this cpu's secure context */
 	cm_init_my_context(&optee_on_entrypoint);

services/spd/opteed/opteed_private.h

@@ -149,6 +149,7 @@ void opteed_init_optee_ep_state(struct entry_point_info *optee_ep,
 				uint64_t pc,
 				uint64_t pageable_part,
 				uint64_t mem_limit,
+				uint64_t dt_addr,
 				optee_context_t *optee_ctx);
 
 extern optee_context_t opteed_sp_context[OPTEED_CORE_COUNT];