[Minios-devel] [UNIKRAFT PATCHv6 14/37] plat/common: Common arm64 CPU interrupt flag handling

[Wei Chen <wei.chen@xxxxxxx>]

From: Wei Chen <Wei.Chen@xxxxxxx>

Although we haven't implemented the GIC libraries in this
stage, but we still can implement the interrupt flag handle
interface for CPU.

Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
---
 plat/common/include/arm/arm64/irq.h | 105 ++++++++++++++++++++++++++++
 plat/common/include/arm/irq.h       |  44 ++++++++++++
 plat/common/include/irq.h           |  47 +++++++++++++
 3 files changed, 196 insertions(+)
 create mode 100644 plat/common/include/arm/arm64/irq.h
 create mode 100644 plat/common/include/arm/irq.h
 create mode 100644 plat/common/include/irq.h

diff --git a/plat/common/include/arm/arm64/irq.h 
b/plat/common/include/arm/arm64/irq.h
new file mode 100644
index 0000000..8f91e17
--- /dev/null
+++ b/plat/common/include/arm/arm64/irq.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Wei Chen <wei.chen@xxxxxxx>
+ *
+ * Copyright (c) 2018, Arm Ltd. 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 __PLAT_CMN_ARM64_IRQ_H__
+#define __PLAT_CMN_ARM64_IRQ_H__
+
+/*
+ * SPSR_EL1, Saved Program Status Register
+ * When the exception is taken in AArch64:
+ * M[3:2] is the exception level
+ * M[1]   is unused
+ * M[0]   is the SP select:
+ *         0: always SP0
+ *         1: current ELs SP
+ */
+#define PSR_M_EL0t     0x00000000
+#define PSR_M_EL1t     0x00000004
+#define PSR_M_EL1h     0x00000005
+#define PSR_M_EL2t     0x00000008
+#define PSR_M_EL2h     0x00000009
+#define PSR_M_MASK     0x0000000f
+
+#define PSR_AARCH32    0x00000010
+#define PSR_F          0x00000040
+#define PSR_I          0x00000080
+#define PSR_A          0x00000100
+#define PSR_D          0x00000200
+#define PSR_IL         0x00100000
+#define PSR_SS         0x00200000
+#define PSR_V          0x10000000
+#define PSR_C          0x20000000
+#define PSR_Z          0x40000000
+#define PSR_N          0x80000000
+#define PSR_FLAGS      0xf0000000
+
+#define __disable_irq() \
+({ \
+       __asm __volatile( "msr daifset, #2" : : : "memory" ); \
+})
+
+#define __enable_irq() \
+({ \
+       __asm __volatile( "msr daifclr, #2" : : : "memory" ); \
+})
+
+#define __save_flags(x) \
+({ \
+       __asm __volatile( "mrs %x0, daif" : "=&r" (x) : : ); \
+})
+
+#define __restore_flags(x) \
+({ \
+       __asm __volatile ( "msr daif, %0" : : "r" (x) : "memory" ); \
+})
+
+#define __save_and_disable_irq(x) \
+({ \
+       __save_flags(x); \
+       __disable_irq(); \
+})
+
+static inline int irqs_disabled(void)
+{
+       uint64_t flags;
+       __save_flags(flags);
+       return !(flags & PSR_I);
+}
+
+#define local_irq_save(x)      __save_and_disable_irq(x)
+#define local_irq_restore(x)   __restore_flags(x)
+#define local_save_flags(x)    __save_flags(x)
+#define local_irq_disable()    __disable_irq()
+#define local_irq_enable()     __enable_irq()
+
+#endif /* __PLAT_CMN_ARM64_IRQ_H__ */
diff --git a/plat/common/include/arm/irq.h b/plat/common/include/arm/irq.h
new file mode 100644
index 0000000..ba85183
--- /dev/null
+++ b/plat/common/include/arm/irq.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Wei Chen <wei.chen@xxxxxxx>
+ *
+ * Copyright (c) 2018, Arm Ltd. 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 __PLAT_CMN_ARM_IRQ_H__
+#define __PLAT_CMN_ARM_IRQ_H__
+
+#if defined(__ARM_64__)
+#include <arm/arm64/irq.h>
+#else
+#error "Add irq.h for current architecture."
+#endif
+
+#endif /* __PLAT_CMN_ARM_IRQ_H__ */
diff --git a/plat/common/include/irq.h b/plat/common/include/irq.h
new file mode 100644
index 0000000..edaccfe
--- /dev/null
+++ b/plat/common/include/irq.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Wei Chen <wei.chen@xxxxxxx>
+ *
+ * Copyright (c) 2018, Arm Ltd., 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 __PLAT_CMN_IRQ_H__
+#define __PLAT_CMN_IRQ_H__
+
+#if defined(__X86_64__)
+#include <x86/irq.h>
+#elif defined(__ARM_64__)
+#include <arm/irq.h>
+#else
+#error "Add irq.h for current architecture."
+#endif
+
+
+#endif /* __PLAT_CMN_IRQ_H__ */
-- 
2.17.1


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