sp_min: Implement sp_min_plat_runtime_setup()

On ARM platforms before exiting from SP_MIN ensure that
the default console is switched to the runtime serial port.

Change-Id: I0ca0d42cc47e345d56179eac16aa3d6712767c9b
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>

bl32/sp_min/sp_min_main.c

@@ -176,6 +176,12 @@ void sp_min_main(void)
 	 * corresponding to the desired security state after the next ERET.
 	 */
 	sp_min_prepare_next_image_entry();
+
+	/*
+	 * Perform any platform specific runtime setup prior to cold boot exit
+	 * from SP_MIN.
+	 */
+	sp_min_plat_runtime_setup();
 }
 
 /******************************************************************************

include/bl32/sp_min/platform_sp_min.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,8 +12,9 @@
  ******************************************************************************/
 void sp_min_early_platform_setup(void *from_bl2,
 		void *plat_params_from_bl2);
-void sp_min_plat_arch_setup(void);
 void sp_min_platform_setup(void);
+void sp_min_plat_runtime_setup(void);
+void sp_min_plat_arch_setup(void);
 entry_point_info_t *sp_min_plat_get_bl33_ep_info(void);
 
 #endif /* __PLATFORM_SP_MIN_H__ */

include/plat/arm/board/common/board_css_def.h

@@ -54,6 +54,9 @@
 #define PLAT_ARM_BL31_RUN_UART_BASE		SOC_CSS_UART1_BASE
 #define PLAT_ARM_BL31_RUN_UART_CLK_IN_HZ	SOC_CSS_UART1_CLK_IN_HZ
 
+#define PLAT_ARM_SP_MIN_RUN_UART_BASE		SOC_CSS_UART1_BASE
+#define PLAT_ARM_SP_MIN_RUN_UART_CLK_IN_HZ	SOC_CSS_UART1_CLK_IN_HZ
+
 #define PLAT_ARM_CRASH_UART_BASE		PLAT_ARM_BL31_RUN_UART_BASE
 #define PLAT_ARM_CRASH_UART_CLK_IN_HZ		PLAT_ARM_BL31_RUN_UART_CLK_IN_HZ
 

include/plat/arm/common/plat_arm.h

@@ -163,6 +163,7 @@ void arm_tsp_early_platform_setup(void);
 /* SP_MIN utility functions */
 void arm_sp_min_early_platform_setup(void *from_bl2,
 		void *plat_params_from_bl2);
+void arm_sp_min_plat_runtime_setup(void);
 
 /* FIP TOC validity check */
 int arm_io_is_toc_valid(void);

plat/arm/board/fvp/include/platform_def.h

@@ -56,6 +56,9 @@
 #define PLAT_ARM_BL31_RUN_UART_BASE		V2M_IOFPGA_UART1_BASE
 #define PLAT_ARM_BL31_RUN_UART_CLK_IN_HZ	V2M_IOFPGA_UART1_CLK_IN_HZ
 
+#define PLAT_ARM_SP_MIN_RUN_UART_BASE		V2M_IOFPGA_UART1_BASE
+#define PLAT_ARM_SP_MIN_RUN_UART_CLK_IN_HZ	V2M_IOFPGA_UART1_CLK_IN_HZ
+
 #define PLAT_ARM_CRASH_UART_BASE	PLAT_ARM_BL31_RUN_UART_BASE
 #define PLAT_ARM_CRASH_UART_CLK_IN_HZ	PLAT_ARM_BL31_RUN_UART_CLK_IN_HZ
 

plat/arm/common/sp_min/arm_sp_min_setup.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -127,6 +127,17 @@ void sp_min_early_platform_setup(void *from_bl2,
 	plat_arm_interconnect_enter_coherency();
 }
 
+/*******************************************************************************
+ * Perform any SP_MIN platform runtime setup prior to SP_MIN exit.
+ * Common to ARM standard platforms.
+ ******************************************************************************/
+void arm_sp_min_plat_runtime_setup(void)
+{
+	/* Initialize the runtime console */
+	console_init(PLAT_ARM_SP_MIN_RUN_UART_BASE,
+		PLAT_ARM_SP_MIN_RUN_UART_CLK_IN_HZ, ARM_CONSOLE_BAUDRATE);
+}
+
 /*******************************************************************************
  * Perform platform specific setup for SP_MIN
  ******************************************************************************/
@@ -155,6 +166,11 @@ void sp_min_platform_setup(void)
 	plat_arm_pwrc_setup();
 }
 
+void sp_min_plat_runtime_setup(void)
+{
+	arm_sp_min_plat_runtime_setup();
+}
+
 /*******************************************************************************
  * Perform the very early platform specific architectural setup here. At the
  * moment this only initializes the MMU

plat/common/aarch32/plat_common.c

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#include <console.h>
 #include <platform.h>
 #include <xlat_mmu_helpers.h>
 
@@ -13,8 +14,18 @@
  * platforms but may also be overridden by a platform if required.
  */
 #pragma weak bl32_plat_enable_mmu
+#pragma weak sp_min_plat_runtime_setup
 
 void bl32_plat_enable_mmu(uint32_t flags)
 {
 	enable_mmu_secure(flags);
 }
+
+void sp_min_plat_runtime_setup(void)
+{
+	/*
+	 * Finish the use of console driver in SP_MIN so that any runtime logs
+	 * from SP_MIN will be suppressed.
+	 */
+	console_uninit();
+}