plat/arm/fvp: populate runtime console parameters dynamically

We query the UART base address and clk frequency in runtime
using fconf getter APIs.

Change-Id: I5f4e84953be5f384472bf90720b706d45cb86260
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>

plat/arm/board/fvp/fvp_console.c

+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <platform_def.h>
+
+#include <common/debug.h>
+#include <drivers/arm/pl011.h>
+#include <drivers/console.h>
+#include <fconf_hw_config_getter.h>
+#include <plat/arm/common/plat_arm.h>
+
+static console_t fvp_runtime_console;
+
+/* Initialize the runtime console */
+void arm_console_runtime_init(void)
+{
+	uintptr_t uart_base;
+	uint32_t uart_clk;
+
+	/*
+	 * fconf APIs are not supported for RESET_TO_SP_MIN, RESET_TO_BL31 and
+	 * BL2_AT_EL3 systems.
+	 */
+#if RESET_TO_SP_MIN || RESET_TO_BL31 || BL2_AT_EL3
+	uart_base = PLAT_ARM_RUN_UART_BASE;
+	uart_clk = PLAT_ARM_RUN_UART_CLK_IN_HZ;
+#else
+	uart_base = FCONF_GET_PROPERTY(hw_config, uart_serial_config,
+					uart_base);
+	uart_clk = FCONF_GET_PROPERTY(hw_config, uart_serial_config,
+					uart_clk);
+#endif
+
+	int rc = console_pl011_register(uart_base, uart_clk,
+					ARM_CONSOLE_BAUDRATE,
+					&fvp_runtime_console);
+
+	if (rc == 0) {
+		panic();
+	}
+
+	console_set_scope(&fvp_runtime_console, CONSOLE_FLAG_RUNTIME);
+}
+
+void arm_console_runtime_end(void)
+{
+	(void)console_flush();
+	(void)console_unregister(&fvp_runtime_console);
+}

plat/arm/board/fvp/platform.mk

@@ -201,6 +201,7 @@ BL31_SOURCES		+=	drivers/arm/fvp/fvp_pwrc.c			\
 				drivers/cfi/v2m/v2m_flash.c			\
 				lib/utils/mem_region.c				\
 				plat/arm/board/fvp/fvp_bl31_setup.c		\
+				plat/arm/board/fvp/fvp_console.c		\
 				plat/arm/board/fvp/fvp_pm.c			\
 				plat/arm/board/fvp/fvp_topology.c		\
 				plat/arm/board/fvp/aarch64/fvp_helpers.S	\

plat/arm/board/fvp/sp_min/sp_min-fvp.mk

@@ -10,6 +10,7 @@ BL32_SOURCES		+=	drivers/arm/fvp/fvp_pwrc.c			\
 				lib/utils/mem_region.c				\
 				plat/arm/board/fvp/aarch32/fvp_helpers.S	\
 				plat/arm/board/fvp/fvp_pm.c			\
+				plat/arm/board/fvp/fvp_console.c		\
 				plat/arm/board/fvp/fvp_topology.c		\
 				plat/arm/board/fvp/sp_min/fvp_sp_min_setup.c	\
 				plat/arm/common/arm_nor_psci_mem_protect.c	\

plat/arm/common/arm_console.c

@@ -13,6 +13,9 @@
 #include <drivers/console.h>
 #include <plat/arm/common/plat_arm.h>
 
+#pragma weak arm_console_runtime_init
+#pragma weak arm_console_runtime_end
+
 /*******************************************************************************
  * Functions that set up the console
  ******************************************************************************/