[Minios-devel] [UNIKRAFT PATCH 16/17] plat/xen: Add IRQ subsystem initialization function

[Costin Lupu <costin.lupu@xxxxxxxxx>]

Introducing ukplat_irq_init function for IRQ subsystem initialization.
The IRQ subsystem might require memory allocations for shared IRQ
handling in which case the allocator must be specified on init.

Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
---
 include/uk/plat/irq.h | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 plat/xen/events.c     |  8 ++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 include/uk/plat/irq.h

diff --git a/include/uk/plat/irq.h b/include/uk/plat/irq.h
new file mode 100644
index 0000000..b4e6375
--- /dev/null
+++ b/include/uk/plat/irq.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Costin Lupu <costin.lupu@xxxxxxxxx>
+ *
+ * Copyright (c) 2018, NEC Europe Ltd., NEC Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+#ifndef __UKPLAT_IRQ_H__
+#define __UKPLAT_IRQ_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct uk_alloc;
+
+/**
+ * Initializes platform IRQ subsystem
+ * @param a The allocator to be used for internal memory allocations
+ * @return initialization status
+ */
+int ukplat_irq_init(struct uk_alloc *a);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __UKPLAT_IRQ_H__ */
diff --git a/plat/xen/events.c b/plat/xen/events.c
index 9396747..1709b90 100644
--- a/plat/xen/events.c
+++ b/plat/xen/events.c
@@ -327,3 +327,11 @@ inline void clear_evtchn(uint32_t port)
 
        ukarch_clr_bit_sync(port, &s->evtchn_pending[0]);
 }
+
+struct uk_alloc;
+
+int ukplat_irq_init(struct uk_alloc *a __unused)
+{
+       /* Nothing for now */
+       return 0;
+}
-- 
2.1.4


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