plat:xilinx:zynqmp: Add JTAG DCC support

As per the new multi-console framework, updating the JTAG DCC support.
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Change-Id: I62cfbb57ae7e454fbc91d1c54aafa6e99f9a35c8

docs/plat/xilinx-zynqmp.rst

@@ -22,6 +22,12 @@ To build bl32 TSP you have to rebuild bl31 too:
 
     make CROSS_COMPILE=aarch64-none-elf- PLAT=zynqmp SPD=tspd bl31 bl32
 
+To build TF-A for JTAG DCC console:
+
+.. code:: bash
+
+    make CROSS_COMPILE=aarch64-none-elf- PLAT=zynqmp RESET_TO_BL31=1 bl31 ZYNQMP_CONSOLE=dcc
+
 ZynqMP platform specific build options
 --------------------------------------
 

plat/xilinx/zynqmp/bl31_zynqmp_setup.c

 /*
- * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -10,6 +10,7 @@
 #include <bl31/bl31.h>
 #include <common/bl_common.h>
 #include <common/debug.h>
+#include <drivers/arm/dcc.h>
 #include <drivers/console.h>
 #include <plat/arm/common/plat_arm.h>
 #include <plat/common/platform.h>
@@ -62,15 +63,23 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
 				u_register_t arg2, u_register_t arg3)
 {
 	uint64_t atf_handoff_addr;
-	/* Register the console to provide early debug support */
-	static console_t bl31_boot_console;
-	(void)console_cdns_register(ZYNQMP_UART_BASE,
-				       zynqmp_get_uart_clk(),
-				       ZYNQMP_UART_BAUDRATE,
-				       &bl31_boot_console);
-	console_set_scope(&bl31_boot_console,
-			  CONSOLE_FLAG_RUNTIME | CONSOLE_FLAG_BOOT);
 
+	if (ZYNQMP_CONSOLE_IS(cadence)) {
+		/* Register the console to provide early debug support */
+		static console_t bl31_boot_console;
+		(void)console_cdns_register(ZYNQMP_UART_BASE,
+					       zynqmp_get_uart_clk(),
+					       ZYNQMP_UART_BAUDRATE,
+					       &bl31_boot_console);
+		console_set_scope(&bl31_boot_console,
+				  CONSOLE_FLAG_RUNTIME | CONSOLE_FLAG_BOOT);
+	} else if (ZYNQMP_CONSOLE_IS(dcc)) {
+		/* Initialize the dcc console for debug */
+		int rc = console_dcc_register();
+		if (rc == 0) {
+			panic();
+		}
+	}
 	/* Initialize the platform config for future decision making */
 	zynqmp_config_setup();
 

plat/xilinx/zynqmp/platform.mk

 #
-# Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2013-2021, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
@@ -41,8 +41,6 @@ ifdef ZYNQMP_BL32_MEM_BASE
     $(eval $(call add_define,ZYNQMP_BL32_MEM_SIZE))
 endif
 
-ZYNQMP_CONSOLE	?=	cadence
-$(eval $(call add_define_val,ZYNQMP_CONSOLE,ZYNQMP_CONSOLE_ID_${ZYNQMP_CONSOLE}))
 
 ifdef ZYNQMP_WDT_RESTART
 $(eval $(call add_define,ZYNQMP_WDT_RESTART))
@@ -64,6 +62,7 @@ include drivers/arm/gic/v2/gicv2.mk
 
 PLAT_BL_COMMON_SOURCES	:=	lib/xlat_tables/xlat_tables_common.c		\
 				lib/xlat_tables/aarch64/xlat_tables.c		\
+				drivers/arm/dcc/dcc_console.c			\
 				drivers/delay_timer/delay_timer.c		\
 				drivers/delay_timer/generic_delay_timer.c	\
 				${GICV2_SOURCES}				\
@@ -78,6 +77,13 @@ PLAT_BL_COMMON_SOURCES	:=	lib/xlat_tables/xlat_tables_common.c		\
 				plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S	\
 				plat/xilinx/zynqmp/aarch64/zynqmp_common.c
 
+ZYNQMP_CONSOLE	?=	cadence
+ifeq (${ZYNQMP_CONSOLE}, $(filter ${ZYNQMP_CONSOLE},cadence cadence0 cadence1 dcc))
+else
+  $(error "Please define ZYNQMP_CONSOLE")
+endif
+$(eval $(call add_define_val,ZYNQMP_CONSOLE,ZYNQMP_CONSOLE_ID_${ZYNQMP_CONSOLE}))
+
 BL31_SOURCES		+=	drivers/arm/cci/cci.c				\
 				lib/cpus/aarch64/aem_generic.S			\
 				lib/cpus/aarch64/cortex_a53.S			\