plat/qemu: trigger reboot with secure pl061

Secure pl061 qemu driver allows to rize the GPIO pin
from the secure world to reboot and power down
virtual machine.

Do not define secure-gpio for sbsa-ref platform due to
reboot is done via sbsa-ec watchdog.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Change-Id: I508d7c5cf4c75cb169b34b00682a76f6761d3869

plat/qemu/common/qemu_bl31_setup.c

@@ -7,6 +7,7 @@
 #include <assert.h>
 
 #include <common/bl_common.h>
+#include <drivers/arm/pl061_gpio.h>
 #include <plat/common/platform.h>
 
 #include "qemu_private.h"
@@ -69,9 +70,18 @@ void bl31_plat_arch_setup(void)
 			      BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_END);
 }
 
+static void qemu_gpio_init(void)
+{
+#ifdef SECURE_GPIO_BASE
+	pl061_gpio_init();
+	pl061_gpio_register(SECURE_GPIO_BASE, 0);
+#endif
+}
+
 void bl31_platform_setup(void)
 {
 	plat_qemu_gic_init();
+	qemu_gpio_init();
 }
 
 unsigned int plat_get_syscnt_freq2(void)

plat/qemu/common/qemu_pm.c

@@ -12,6 +12,7 @@
 #include <lib/psci/psci.h>
 #include <lib/semihosting.h>
 #include <plat/common/platform.h>
+#include <drivers/gpio.h>
 
 #include "qemu_private.h"
 
@@ -201,16 +202,31 @@ void qemu_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
 /*******************************************************************************
  * Platform handlers to shutdown/reboot the system
  ******************************************************************************/
+
 static void __dead2 qemu_system_off(void)
 {
+#ifdef SECURE_GPIO_BASE
+	ERROR("QEMU System Power off: with GPIO.\n");
+	gpio_set_direction(SECURE_GPIO_POWEROFF, GPIO_DIR_OUT);
+	gpio_set_value(SECURE_GPIO_POWEROFF, GPIO_LEVEL_HIGH);
+	gpio_set_value(SECURE_GPIO_POWEROFF, GPIO_LEVEL_LOW);
+#else
 	semihosting_exit(ADP_STOPPED_APPLICATION_EXIT, 0);
 	ERROR("QEMU System Off: semihosting call unexpectedly returned.\n");
+#endif
 	panic();
 }
 
 static void __dead2 qemu_system_reset(void)
 {
+	ERROR("QEMU System Reset: with GPIO.\n");
+#ifdef SECURE_GPIO_BASE
+	gpio_set_direction(SECURE_GPIO_RESET, GPIO_DIR_OUT);
+	gpio_set_value(SECURE_GPIO_RESET, GPIO_LEVEL_HIGH);
+	gpio_set_value(SECURE_GPIO_RESET, GPIO_LEVEL_LOW);
+#else
 	ERROR("QEMU System Reset: operation not handled.\n");
+#endif
 	panic();
 }
 

plat/qemu/qemu/include/platform_def.h

@@ -81,6 +81,11 @@
 #define SEC_DRAM_BASE			0x0e100000
 #define SEC_DRAM_SIZE			0x00f00000
 
+#define SECURE_GPIO_BASE		0x090b0000
+#define SECURE_GPIO_SIZE		0x00001000
+#define SECURE_GPIO_POWEROFF		0
+#define SECURE_GPIO_RESET		1
+
 /* Load pageable part of OP-TEE 2MB above secure DRAM base */
 #define QEMU_OPTEE_PAGEABLE_LOAD_BASE	(SEC_DRAM_BASE + 0x00200000)
 #define QEMU_OPTEE_PAGEABLE_LOAD_SIZE	0x00400000
@@ -202,7 +207,7 @@
 #define DEVICE0_BASE			0x08000000
 #define DEVICE0_SIZE			0x01000000
 #define DEVICE1_BASE			0x09000000
-#define DEVICE1_SIZE			0x00041000
+#define DEVICE1_SIZE			0x00c00000
 
 /*
  * GIC related constants

plat/qemu/qemu/platform.mk

@@ -163,6 +163,8 @@ BL31_SOURCES		+=	lib/cpus/aarch64/aem_generic.S		\
 				lib/semihosting/semihosting.c		\
 				lib/semihosting/${ARCH}/semihosting_call.S \
 				plat/common/plat_psci_common.c		\
+				drivers/arm/pl061/pl061_gpio.c		\
+				drivers/gpio/gpio.c			\
 				${PLAT_QEMU_COMMON_PATH}/qemu_pm.c			\
 				${PLAT_QEMU_COMMON_PATH}/topology.c			\
 				${PLAT_QEMU_COMMON_PATH}/aarch64/plat_helpers.S	\