Move generic ipi_mb functions to common files

ipi_mb functions can be used for other Xilinx platform.
Move it to common file from platform specific files.

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Reviewed-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>

7 files changed, 274 insertions, 244 deletions

diff --git a/plat/xilinx/common/include/ipi.h b/plat/xilinx/common/include/ipi.h
index c9fd8d10..483902e0 100644
--- a/plat/xilinx/common/include/ipi.h
+++ b/plat/xilinx/common/include/ipi.h
@@ -12,6 +12,26 @@
 #include <stdint.h>
 
 /*********************************************************************
+ * IPI mailbox status macros
+ ********************************************************************/
+#define IPI_MB_STATUS_IDLE		0
+#define IPI_MB_STATUS_SEND_PENDING	1
+#define IPI_MB_STATUS_RECV_PENDING	2
+
+/*********************************************************************
+ * IPI mailbox call is secure or not macros
+ ********************************************************************/
+#define IPI_MB_CALL_NOTSECURE	0
+#define IPI_MB_CALL_SECURE	1
+
+/*********************************************************************
+ * IPI secure check
+ ********************************************************************/
+#define IPI_SECURE_MASK  0x1U
+#define IPI_IS_SECURE(I) ((ipi_table[(I)].secure_only & \
+			   IPI_SECURE_MASK) ? 1 : 0)
+
+/*********************************************************************
  * Struct definitions
  ********************************************************************/
 
@@ -22,4 +42,36 @@ struct ipi_config {
 	unsigned char secure_only;
 };
 
+/*********************************************************************
+ * IPI APIs declarations
+ ********************************************************************/
+
+/* Initialize IPI configuration table */
+void ipi_config_table_init(const struct ipi_config *ipi_table,
+			   uint32_t total_ipi);
+
+/* Validate IPI mailbox access */
+int ipi_mb_validate(uint32_t local, uint32_t remote, unsigned int is_secure);
+
+/* Open the IPI mailbox */
+void ipi_mb_open(uint32_t local, uint32_t remote);
+
+/* Release the IPI mailbox */
+void ipi_mb_release(uint32_t local, uint32_t remote);
+
+/* Enquire IPI mailbox status */
+int ipi_mb_enquire_status(uint32_t local, uint32_t remote);
+
+/* Trigger notification on the IPI mailbox */
+void ipi_mb_notify(uint32_t local, uint32_t remote, uint32_t is_blocking);
+
+/* Ack IPI mailbox notification */
+void ipi_mb_ack(uint32_t local, uint32_t remote);
+
+/* Disable IPI mailbox notification interrupt */
+void ipi_mb_disable_irq(uint32_t local, uint32_t remote);
+
+/* Enable IPI mailbox notification interrupt */
+void ipi_mb_enable_irq(uint32_t local, uint32_t remote);
+
 #endif /* IPI_H */
diff --git a/plat/xilinx/common/ipi.c b/plat/xilinx/common/ipi.c
new file mode 100644
index 00000000..0b8020b4
--- /dev/null
+++ b/plat/xilinx/common/ipi.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Xilinx IPI agent registers access management
+ */
+
+#include <errno.h>
+#include <string.h>
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include <lib/bakery_lock.h>
+#include <lib/mmio.h>
+
+#include <ipi.h>
+#include <plat_ipi.h>
+#include <plat_private.h>
+
+/*********************************************************************
+ * Macros definitions
+ ********************************************************************/
+
+/* IPI registers offsets macros */
+#define IPI_TRIG_OFFSET 0x00U
+#define IPI_OBR_OFFSET  0x04U
+#define IPI_ISR_OFFSET  0x10U
+#define IPI_IMR_OFFSET  0x14U
+#define IPI_IER_OFFSET  0x18U
+#define IPI_IDR_OFFSET  0x1CU
+
+/* IPI register start offset */
+#define IPI_REG_BASE(I) (ipi_table[(I)].ipi_reg_base)
+
+/* IPI register bit mask */
+#define IPI_BIT_MASK(I) (ipi_table[(I)].ipi_bit_mask)
+
+/* IPI configuration table */
+const static struct ipi_config *ipi_table;
+
+/* Total number of IPI */
+static uint32_t ipi_total;
+
+/**
+ * ipi_config_init() - Initialize IPI configuration data
+ *
+ * @ipi_config_table  - IPI configuration table
+ * @ipi_total - Total number of IPI available
+ *
+ */
+void ipi_config_table_init(const struct ipi_config *ipi_config_table,
+			   uint32_t total_ipi)
+{
+	ipi_table = ipi_config_table;
+	ipi_total = total_ipi;
+}
+
+/* is_ipi_mb_within_range() - verify if IPI mailbox is within range
+ *
+ * @local  - local IPI ID
+ * @remote - remote IPI ID
+ *
+ * return - 1 if within range, 0 if not
+ */
+static inline int is_ipi_mb_within_range(uint32_t local, uint32_t remote)
+{
+	int ret = 1;
+
+	if (remote >= ipi_total || local >= ipi_total)
+		ret = 0;
+
+	return ret;
+}
+
+/**
+ * ipi_mb_validate() - validate IPI mailbox access
+ *
+ * @local  - local IPI ID
+ * @remote - remote IPI ID
+ * @is_secure - indicate if the requester is from secure software
+ *
+ * return - 0 success, negative value for errors
+ */
+int ipi_mb_validate(uint32_t local, uint32_t remote, unsigned int is_secure)
+{
+	int ret = 0;
+
+	if (!is_ipi_mb_within_range(local, remote))
+		ret = -EINVAL;
+	else if (IPI_IS_SECURE(local) && !is_secure)
+		ret = -EPERM;
+	else if (IPI_IS_SECURE(remote) && !is_secure)
+		ret = -EPERM;
+
+	return ret;
+}
+
+/**
+ * ipi_mb_open() - Open IPI mailbox.
+ *
+ * @local  - local IPI ID
+ * @remote - remote IPI ID
+ *
+ */
+void ipi_mb_open(uint32_t local, uint32_t remote)
+{
+	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
+		      IPI_BIT_MASK(remote));
+	mmio_write_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET,
+		      IPI_BIT_MASK(remote));
+}
+
+/**
+ * ipi_mb_release() - Open IPI mailbox.
+ *
+ * @local  - local IPI ID
+ * @remote - remote IPI ID
+ *
+ */
+void ipi_mb_release(uint32_t local, uint32_t remote)
+{
+	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
+		      IPI_BIT_MASK(remote));
+}
+
+/**
+ * ipi_mb_enquire_status() - Enquire IPI mailbox status
+ *
+ * @local  - local IPI ID
+ * @remote - remote IPI ID
+ *
+ * return - 0 idle, positive value for pending sending or receiving,
+ *          negative value for errors
+ */
+int ipi_mb_enquire_status(uint32_t local, uint32_t remote)
+{
+	int ret = 0;
+	uint32_t status;
+
+	status = mmio_read_32(IPI_REG_BASE(local) + IPI_OBR_OFFSET);
+	if (status & IPI_BIT_MASK(remote))
+		ret |= IPI_MB_STATUS_SEND_PENDING;
+	status = mmio_read_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET);
+	if (status & IPI_BIT_MASK(remote))
+		ret |= IPI_MB_STATUS_RECV_PENDING;
+
+	return ret;
+}
+
+/* ipi_mb_notify() - Trigger IPI mailbox notification
+ *
+ * @local - local IPI ID
+ * @remote - remote IPI ID
+ * @is_blocking - if to trigger the notification in blocking mode or not.
+ *
+ * It sets the remote bit in the IPI agent trigger register.
+ *
+ */
+void ipi_mb_notify(uint32_t local, uint32_t remote, uint32_t is_blocking)
+{
+	uint32_t status;
+
+	mmio_write_32(IPI_REG_BASE(local) + IPI_TRIG_OFFSET,
+		      IPI_BIT_MASK(remote));
+	if (is_blocking) {
+		do {
+			status = mmio_read_32(IPI_REG_BASE(local) +
+					      IPI_OBR_OFFSET);
+		} while (status & IPI_BIT_MASK(remote));
+	}
+}
+
+/* ipi_mb_ack() - Ack IPI mailbox notification from the other end
+ *
+ * @local - local IPI ID
+ * @remote - remote IPI ID
+ *
+ * It will clear the remote bit in the isr register.
+ *
+ */
+void ipi_mb_ack(uint32_t local, uint32_t remote)
+{
+	mmio_write_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET,
+		      IPI_BIT_MASK(remote));
+}
+
+/* ipi_mb_disable_irq() - Disable IPI mailbox notification interrupt
+ *
+ * @local - local IPI ID
+ * @remote - remote IPI ID
+ *
+ * It will mask the remote bit in the idr register.
+ *
+ */
+void ipi_mb_disable_irq(uint32_t local, uint32_t remote)
+{
+	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
+		      IPI_BIT_MASK(remote));
+}
+
+/* ipi_mb_enable_irq() - Enable IPI mailbox notification interrupt
+ *
+ * @local - local IPI ID
+ * @remote - remote IPI ID
+ *
+ * It will mask the remote bit in the idr register.
+ *
+ */
+void ipi_mb_enable_irq(uint32_t local, uint32_t remote)
+{
+	mmio_write_32(IPI_REG_BASE(local) + IPI_IER_OFFSET,
+		      IPI_BIT_MASK(remote));
+}
diff --git a/plat/xilinx/zynqmp/include/plat_ipi.h b/plat/xilinx/zynqmp/include/plat_ipi.h
index 15d7ab04..c6da2418 100644
--- a/plat/xilinx/zynqmp/include/plat_ipi.h
+++ b/plat/xilinx/zynqmp/include/plat_ipi.h
@@ -28,50 +28,10 @@
 #define IPI_ID_PL3	10U
 
 /*********************************************************************
- * IPI mailbox status macros
+ * Platform specific IPI API declarations
  ********************************************************************/
-#define IPI_MB_STATUS_IDLE		0
-#define IPI_MB_STATUS_SEND_PENDING	1
-#define IPI_MB_STATUS_RECV_PENDING	2
 
-/*********************************************************************
- * IPI mailbox call is secure or not macros
- ********************************************************************/
-#define IPI_MB_CALL_NOTSECURE	0
-#define IPI_MB_CALL_SECURE	1
-
-/*********************************************************************
- * IPI APIs declarations
- ********************************************************************/
 /* Configure IPI table for zynqmp */
 void zynqmp_ipi_config_table_init(void);
 
-/* Initialize IPI configuration table */
-void ipi_config_table_init(const struct ipi_config *ipi_table,
-			   uint32_t total_ipi);
-
-/* Validate IPI mailbox access */
-int ipi_mb_validate(uint32_t local, uint32_t remote, unsigned int is_secure);
-
-/* Open the IPI mailbox */
-void ipi_mb_open(uint32_t local, uint32_t remote);
-
-/* Release the IPI mailbox */
-void ipi_mb_release(uint32_t local, uint32_t remote);
-
-/* Enquire IPI mailbox status */
-int ipi_mb_enquire_status(uint32_t local, uint32_t remote);
-
-/* Trigger notification on the IPI mailbox */
-void ipi_mb_notify(uint32_t local, uint32_t remote, uint32_t is_blocking);
-
-/* Ack IPI mailbox notification */
-void ipi_mb_ack(uint32_t local, uint32_t remote);
-
-/* Disable IPI mailbox notification interrupt */
-void ipi_mb_disable_irq(uint32_t local, uint32_t remote);
-
-/* Enable IPI mailbox notification interrupt */
-void ipi_mb_enable_irq(uint32_t local, uint32_t remote);
-
 #endif /* PLAT_IPI_H */
diff --git a/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
index 932d1e74..c499d78e 100644
--- a/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
+++ b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
@@ -15,6 +15,8 @@
 #include <common/runtime_svc.h>
 #include <lib/bakery_lock.h>
 #include <lib/mmio.h>
+
+#include <ipi.h>
 #include <plat_ipi.h>
 #include <plat_private.h>
 
diff --git a/plat/xilinx/zynqmp/platform.mk b/plat/xilinx/zynqmp/platform.mk
index a4ffd6ce..f0c75992 100644
--- a/plat/xilinx/zynqmp/platform.mk
+++ b/plat/xilinx/zynqmp/platform.mk
@@ -65,6 +65,7 @@ PLAT_BL_COMMON_SOURCES	:=	lib/xlat_tables/xlat_tables_common.c		\
 				plat/arm/common/arm_common.c			\
 				plat/arm/common/arm_gicv2.c			\
 				plat/common/plat_gicv2.c			\
+				plat/xilinx/common/ipi.c			\
 				plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S	\
 				plat/xilinx/zynqmp/aarch64/zynqmp_common.c
 
diff --git a/plat/xilinx/zynqmp/pm_service/pm_ipi.c b/plat/xilinx/zynqmp/pm_service/pm_ipi.c
index 88e23f09..a9f0d755 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_ipi.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_ipi.c
@@ -7,6 +7,8 @@
 #include <arch_helpers.h>
 #include <lib/bakery_lock.h>
 #include <lib/mmio.h>
+
+#include <ipi.h>
 #include <plat_ipi.h>
 #include <plat_private.h>
 #include <plat/common/platform.h>
diff --git a/plat/xilinx/zynqmp/zynqmp_ipi.c b/plat/xilinx/zynqmp/zynqmp_ipi.c
index fd4804dd..f57369fc 100644
--- a/plat/xilinx/zynqmp/zynqmp_ipi.c
+++ b/plat/xilinx/zynqmp/zynqmp_ipi.c
@@ -20,38 +20,6 @@
 #include <plat_ipi.h>
 #include <plat_private.h>
 
-/*********************************************************************
- * Macros definitions
- ********************************************************************/
-
-/* IPI registers base address */
-#define IPI_REGS_BASE   0xFF300000U
-
-/* IPI registers offsets macros */
-#define IPI_TRIG_OFFSET 0x00U
-#define IPI_OBR_OFFSET  0x04U
-#define IPI_ISR_OFFSET  0x10U
-#define IPI_IMR_OFFSET  0x14U
-#define IPI_IER_OFFSET  0x18U
-#define IPI_IDR_OFFSET  0x1CU
-
-/* IPI register start offset */
-#define IPI_REG_BASE(I) (ipi_table[(I)].ipi_reg_base)
-
-/* IPI register bit mask */
-#define IPI_BIT_MASK(I) (ipi_table[(I)].ipi_bit_mask)
-
-/* IPI secure check */
-#define IPI_SECURE_MASK  0x1U
-#define IPI_IS_SECURE(I) ((ipi_table[(I)].secure_only & \
-				IPI_SECURE_MASK) ? 1 : 0)
-
-/* IPI configuration table */
-const static struct ipi_config *ipi_table;
-
-/* Total number of IPI */
-static uint32_t ipi_total;
-
 /* Zynqmp ipi configuration table */
 const static struct ipi_config zynqmp_ipi_table[] = {
 	/* APU IPI */
@@ -130,174 +98,3 @@ void zynqmp_ipi_config_table_init(void)
 {
 	ipi_config_table_init(zynqmp_ipi_table, ARRAY_SIZE(zynqmp_ipi_table));
 }
-
-/**
- * ipi_config_table_init() - Initialize IPI configuration data
- *
- * @ipi_config_table  - IPI configuration table
- * @ipi_total - Total number of IPI available
- *
- */
-void ipi_config_table_init(const struct ipi_config *ipi_config_table,
-			   uint32_t total_ipi)
-{
-	ipi_table = ipi_config_table;
-	ipi_total = total_ipi;
-}
-
-/* is_ipi_mb_within_range() - verify if IPI mailbox is within range
- *
- * @local  - local IPI ID
- * @remote - remote IPI ID
- *
- * return - 1 if within range, 0 if not
- */
-static inline int is_ipi_mb_within_range(uint32_t local, uint32_t remote)
-{
-	int ret = 1;
-
-	if (remote >= ipi_total || local >= ipi_total)
-		ret = 0;
-
-	return ret;
-}
-
-/**
- * ipi_mb_validate() - validate IPI mailbox access
- *
- * @local  - local IPI ID
- * @remote - remote IPI ID
- * @is_secure - indicate if the requester is from secure software
- *
- * return - 0 success, negative value for errors
- */
-int ipi_mb_validate(uint32_t local, uint32_t remote, unsigned int is_secure)
-{
-	int ret = 0;
-
-	if (!is_ipi_mb_within_range(local, remote))
-		ret = -EINVAL;
-	else if (IPI_IS_SECURE(local) && !is_secure)
-		ret = -EPERM;
-	else if (IPI_IS_SECURE(remote) && !is_secure)
-		ret = -EPERM;
-
-	return ret;
-}
-
-/**
- * ipi_mb_open() - Open IPI mailbox.
- *
- * @local  - local IPI ID
- * @remote - remote IPI ID
- *
- */
-void ipi_mb_open(uint32_t local, uint32_t remote)
-{
-	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
-		      IPI_BIT_MASK(remote));
-	mmio_write_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET,
-		      IPI_BIT_MASK(remote));
-}
-
-/**
- * ipi_mb_release() - Open IPI mailbox.
- *
- * @local  - local IPI ID
- * @remote - remote IPI ID
- *
- */
-void ipi_mb_release(uint32_t local, uint32_t remote)
-{
-	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
-		      IPI_BIT_MASK(remote));
-}
-
-/**
- * ipi_mb_enquire_status() - Enquire IPI mailbox status
- *
- * @local  - local IPI ID
- * @remote - remote IPI ID
- *
- * return - 0 idle, positive value for pending sending or receiving,
- *          negative value for errors
- */
-int ipi_mb_enquire_status(uint32_t local, uint32_t remote)
-{
-	int ret = 0;
-	uint32_t status;
-
-	status = mmio_read_32(IPI_REG_BASE(local) + IPI_OBR_OFFSET);
-	if (status & IPI_BIT_MASK(remote))
-		ret |= IPI_MB_STATUS_SEND_PENDING;
-	status = mmio_read_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET);
-	if (status & IPI_BIT_MASK(remote))
-		ret |= IPI_MB_STATUS_RECV_PENDING;
-
-	return ret;
-}
-
-/* ipi_mb_notify() - Trigger IPI mailbox notification
- *
- * @local - local IPI ID
- * @remote - remote IPI ID
- * @is_blocking - if to trigger the notification in blocking mode or not.
- *
- * It sets the remote bit in the IPI agent trigger register.
- *
- */
-void ipi_mb_notify(uint32_t local, uint32_t remote, uint32_t is_blocking)
-{
-	uint32_t status;
-
-	mmio_write_32(IPI_REG_BASE(local) + IPI_TRIG_OFFSET,
-		      IPI_BIT_MASK(remote));
-	if (is_blocking) {
-		do {
-			status = mmio_read_32(IPI_REG_BASE(local) +
-					      IPI_OBR_OFFSET);
-		} while (status & IPI_BIT_MASK(remote));
-	}
-}
-
-/* ipi_mb_ack() - Ack IPI mailbox notification from the other end
- *
- * @local - local IPI ID
- * @remote - remote IPI ID
- *
- * It will clear the remote bit in the isr register.
- *
- */
-void ipi_mb_ack(uint32_t local, uint32_t remote)
-{
-	mmio_write_32(IPI_REG_BASE(local) + IPI_ISR_OFFSET,
-		      IPI_BIT_MASK(remote));
-}
-
-/* ipi_mb_disable_irq() - Disable IPI mailbox notification interrupt
- *
- * @local - local IPI ID
- * @remote - remote IPI ID
- *
- * It will mask the remote bit in the idr register.
- *
- */
-void ipi_mb_disable_irq(uint32_t local, uint32_t remote)
-{
-	mmio_write_32(IPI_REG_BASE(local) + IPI_IDR_OFFSET,
-		      IPI_BIT_MASK(remote));
-}
-
-/* ipi_mb_enable_irq() - Enable IPI mailbox notification interrupt
- *
- * @local - local IPI ID
- * @remote - remote IPI ID
- *
- * It will mask the remote bit in the idr register.
- *
- */
-void ipi_mb_enable_irq(uint32_t local, uint32_t remote)
-{
-	mmio_write_32(IPI_REG_BASE(local) + IPI_IER_OFFSET,
-		      IPI_BIT_MASK(remote));
-}