Add Xilinx ZynqMP IPI mailbox service
Add IPI mailbox service to manage Xilinx ZynqMP IPI(Inter Processors
Interrupt) access.
Signed-off-by: Wendy Liang <jliang@xilinx.com>
diff --git a/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
new file mode 100644
index 0000000..bfc19d3
--- /dev/null
+++ b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Top-level SMC handler for ZynqMP IPI Mailbox doorbell functions.
+ */
+
+#include <bakery_lock.h>
+#include <debug.h>
+#include <errno.h>
+#include <mmio.h>
+#include <runtime_svc.h>
+#include <string.h>
+#include "ipi_mailbox_svc.h"
+#include "../zynqmp_ipi.h"
+#include "../zynqmp_private.h"
+#include "../../../services/spd/trusty/smcall.h"
+
+/*********************************************************************
+ * Macros definitions
+ ********************************************************************/
+
+/* IPI SMC calls macros: */
+#define IPI_SMC_OPEN_IRQ_MASK 0x00000001U /* IRQ enable bit in IPI
+ * open SMC call
+ */
+#define IPI_SMC_NOTIFY_BLOCK_MASK 0x00000001U /* Flag to indicate if
+ * IPI notification needs
+ * to be blocking.
+ */
+#define IPI_SMC_ENQUIRY_DIRQ_MASK 0x00000001U /* Flag to indicate if
+ * notification interrupt
+ * to be disabled.
+ */
+#define IPI_SMC_ACK_EIRQ_MASK 0x00000001U /* Flag to indicate if
+ * notification interrupt
+ * to be enable.
+ */
+
+#define UNSIGNED32_MASK 0xFFFFFFFFU /* 32bit mask */
+
+/**
+ * ipi_smc_handler() - SMC handler for IPI SMC calls
+ *
+ * @smc_fid - Function identifier
+ * @x1 - x4 - Arguments
+ * @cookie - Unused
+ * @handler - Pointer to caller's context structure
+ *
+ * @return - Unused
+ *
+ * Determines that smc_fid is valid and supported PM SMC Function ID from the
+ * list of pm_api_ids, otherwise completes the request with
+ * the unknown SMC Function ID
+ *
+ * The SMC calls for PM service are forwarded from SIP Service SMC handler
+ * function with rt_svc_handle signature
+ */
+uint64_t ipi_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2,
+ uint64_t x3, uint64_t x4, void *cookie,
+ void *handle, uint64_t flags)
+{
+ int ret;
+ uint32_t ipi_local_id;
+ uint32_t ipi_remote_id;
+ unsigned int is_secure;
+
+ ipi_local_id = x1 & UNSIGNED32_MASK;
+ ipi_remote_id = x2 & UNSIGNED32_MASK;
+
+ if (SMC_ENTITY(smc_fid) >= SMC_ENTITY_TRUSTED_APP)
+ is_secure = 1;
+ else
+ is_secure = 0;
+
+ /* Validate IPI mailbox access */
+ ret = ipi_mb_validate(ipi_local_id, ipi_remote_id, is_secure);
+ if (ret)
+ SMC_RET1(handle, ret);
+
+ switch (SMC_FUNCTION(smc_fid)) {
+ case IPI_MAILBOX_OPEN:
+ ipi_mb_open(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, 0);
+ case IPI_MAILBOX_RELEASE:
+ ipi_mb_release(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, 0);
+ case IPI_MAILBOX_STATUS_ENQUIRY:
+ {
+ int disable_irq;
+
+ disable_irq = (x3 & IPI_SMC_ENQUIRY_DIRQ_MASK) ? 1 : 0;
+ ret = ipi_mb_enquire_status(ipi_local_id, ipi_remote_id);
+ if ((ret & IPI_MB_STATUS_RECV_PENDING) && disable_irq)
+ ipi_mb_disable_irq(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, ret);
+ }
+ case IPI_MAILBOX_NOTIFY:
+ {
+ uint32_t is_blocking;
+
+ is_blocking = (x3 & IPI_SMC_NOTIFY_BLOCK_MASK) ? 1 : 0;
+ ipi_mb_notify(ipi_local_id, ipi_remote_id, is_blocking);
+ SMC_RET1(handle, 0);
+ }
+ case IPI_MAILBOX_ACK:
+ {
+ int enable_irq;
+
+ enable_irq = (x3 & IPI_SMC_ACK_EIRQ_MASK) ? 1 : 0;
+ ipi_mb_ack(ipi_local_id, ipi_remote_id);
+ if (enable_irq)
+ ipi_mb_enable_irq(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, 0);
+ }
+ case IPI_MAILBOX_ENABLE_IRQ:
+ ipi_mb_enable_irq(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, 0);
+ case IPI_MAILBOX_DISABLE_IRQ:
+ ipi_mb_disable_irq(ipi_local_id, ipi_remote_id);
+ SMC_RET1(handle, 0);
+ default:
+ WARN("Unimplemented IPI service call: 0x%x\n", smc_fid);
+ SMC_RET1(handle, SMC_UNK);
+ }
+}
diff --git a/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.h b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.h
new file mode 100644
index 0000000..387ffd2
--- /dev/null
+++ b/plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* ZynqMP IPI mailbox doorbell service enums and defines */
+
+#ifndef _IPI_MAILBOX_SVC_H_
+#define _IPI_MAILBOX_SVC_H_
+
+#include <stdint.h>
+
+/*********************************************************************
+ * Enum definitions
+ ********************************************************************/
+
+/* IPI SMC function numbers enum definition */
+enum ipi_api_id {
+ /* IPI mailbox operations functions: */
+ IPI_MAILBOX_OPEN = 0x1000,
+ IPI_MAILBOX_RELEASE,
+ IPI_MAILBOX_STATUS_ENQUIRY,
+ IPI_MAILBOX_NOTIFY,
+ IPI_MAILBOX_ACK,
+ IPI_MAILBOX_ENABLE_IRQ,
+ IPI_MAILBOX_DISABLE_IRQ
+};
+
+/*********************************************************************
+ * IPI mailbox service APIs declarations
+ ********************************************************************/
+
+/* IPI SMC handler */
+uint64_t ipi_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2,
+ uint64_t x3, uint64_t x4, void *cookie, void *handle,
+ uint64_t flags);
+
+#endif /* _IPI_MAILBOX_SVC_H_ */
diff --git a/plat/xilinx/zynqmp/platform.mk b/plat/xilinx/zynqmp/platform.mk
index a31e31d..bdd194b 100644
--- a/plat/xilinx/zynqmp/platform.mk
+++ b/plat/xilinx/zynqmp/platform.mk
@@ -42,7 +42,8 @@
PLAT_INCLUDES := -Iinclude/plat/arm/common/ \
-Iinclude/plat/arm/common/aarch64/ \
-Iplat/xilinx/zynqmp/include/ \
- -Iplat/xilinx/zynqmp/pm_service/
+ -Iplat/xilinx/zynqmp/pm_service/ \
+ -Iplat/xilinx/zynqmp/ipi_mailbox_service/
PLAT_BL_COMMON_SOURCES := lib/xlat_tables/xlat_tables_common.c \
lib/xlat_tables/aarch64/xlat_tables.c \
@@ -75,4 +76,5 @@
plat/xilinx/zynqmp/pm_service/pm_svc_main.c \
plat/xilinx/zynqmp/pm_service/pm_api_sys.c \
plat/xilinx/zynqmp/pm_service/pm_ipi.c \
- plat/xilinx/zynqmp/pm_service/pm_client.c
+ plat/xilinx/zynqmp/pm_service/pm_client.c \
+ plat/xilinx/zynqmp/ipi_mailbox_service/ipi_mailbox_svc.c
diff --git a/plat/xilinx/zynqmp/sip_svc_setup.c b/plat/xilinx/zynqmp/sip_svc_setup.c
index ae6ecaf..8b44eaa 100644
--- a/plat/xilinx/zynqmp/sip_svc_setup.c
+++ b/plat/xilinx/zynqmp/sip_svc_setup.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -8,7 +8,9 @@
#include <runtime_svc.h>
#include <uuid.h>
+#include "ipi_mailbox_svc.h"
#include "pm_svc_main.h"
+#include "zynqmp_ipi.h"
/* SMC function IDs for SiP Service queries */
#define ZYNQMP_SIP_SVC_CALL_COUNT 0x8200ff00
@@ -19,10 +21,12 @@
#define SIP_SVC_VERSION_MAJOR 0
#define SIP_SVC_VERSION_MINOR 1
-/* These macros are used to identify PM calls from the SMC function ID */
+/* These macros are used to identify PM, IPI calls from the SMC function ID */
#define PM_FID_MASK 0xf000u
#define PM_FID_VALUE 0u
+#define IPI_FID_VALUE 0x1000u
#define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
+#define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE)
/* SiP Service UUID */
DEFINE_SVC_UUID(zynqmp_sip_uuid,
@@ -63,6 +67,12 @@
flags);
}
+ /* Let IPI SMC handler deal with IPI-related requests */
+ if (is_ipi_fid(smc_fid)) {
+ return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
+ flags);
+ }
+
switch (smc_fid) {
case ZYNQMP_SIP_SVC_CALL_COUNT:
/* PM functions + default functions */