From: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
To: xen-devel@lists.xen.org
Cc: "Edgar E . Iglesias" <edgar.iglesias@xilinx.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Wei Liu <wei.liu2@citrix.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
Julien Grall <julien.grall@arm.com>,
Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Subject: [PATCH v8 06/11] arm: add SMCCC protocol definitions
Date: Tue, 10 Oct 2017 18:52:46 +0300 [thread overview]
Message-ID: <1507650771-16631-7-git-send-email-volodymyr_babchuk@epam.com> (raw)
In-Reply-To: <1507650771-16631-1-git-send-email-volodymyr_babchuk@epam.com>
Add generic definitions used in ARM SMC call convention.
Those definitions was originally added to Linux kernel as
include/linux/arm-smccc.h by commit 98dd64f34f47
("ARM: 8478/2: arm/arm64: add arm-smccc")
I extended them and formatted according to XEN coding style. Some
of the macros were converted to inlined functions to ease parsing.
They can be used by both SMCCC clients (like PSCI) and by SMCCC
servers (like vPSCI or upcoming generic SMCCC handler).
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Julien Grall <julien.grall@arm.com>
---
xen/include/asm-arm/smccc.h | 105 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 105 insertions(+)
create mode 100644 xen/include/asm-arm/smccc.h
diff --git a/xen/include/asm-arm/smccc.h b/xen/include/asm-arm/smccc.h
new file mode 100644
index 0000000..f543dea
--- /dev/null
+++ b/xen/include/asm-arm/smccc.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2015, Linaro Limited
+ * Copyright (c) 2017, EPAM Systems
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __ASM_ARM_SMCCC_H__
+#define __ASM_ARM_SMCCC_H__
+
+/*
+ * This file provides common defines for ARM SMC Calling Convention as
+ * specified in
+ * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
+ */
+
+#define ARM_SMCCC_STD_CALL 0U
+#define ARM_SMCCC_FAST_CALL 1U
+#define ARM_SMCCC_TYPE_SHIFT 31
+
+#define ARM_SMCCC_CONV_32 0U
+#define ARM_SMCCC_CONV_64 1U
+#define ARM_SMCCC_CONV_SHIFT 30
+
+#define ARM_SMCCC_OWNER_MASK 0x3FU
+#define ARM_SMCCC_OWNER_SHIFT 24
+
+#define ARM_SMCCC_FUNC_MASK 0xFFFFU
+
+/* Check if this is fast call. */
+static inline bool smccc_is_fast_call(register_t funcid)
+{
+ return funcid & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT);
+}
+
+/* Chek if this is 64-bit call. */
+static inline bool smccc_is_conv_64(register_t funcid)
+{
+ return funcid & (ARM_SMCCC_CONV_64 << ARM_SMCCC_CONV_SHIFT);
+}
+
+/* Get function number from function identifier. */
+static inline uint32_t smccc_get_fn(register_t funcid)
+{
+ return funcid & ARM_SMCCC_FUNC_MASK;
+}
+
+/* Get service owner number from function identifier. */
+static inline uint32_t smccc_get_owner(register_t funcid)
+{
+ return (funcid >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK;
+}
+
+/*
+ * Construct function identifier from call type (fast or standard),
+ * calling convention (32 or 64 bit), service owner and function number.
+ */
+#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
+ (((type) << ARM_SMCCC_TYPE_SHIFT) | \
+ ((calling_convention) << ARM_SMCCC_CONV_SHIFT) | \
+ (((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
+ (func_num))
+
+/* List of known service owners */
+#define ARM_SMCCC_OWNER_ARCH 0
+#define ARM_SMCCC_OWNER_CPU 1
+#define ARM_SMCCC_OWNER_SIP 2
+#define ARM_SMCCC_OWNER_OEM 3
+#define ARM_SMCCC_OWNER_STANDARD 4
+#define ARM_SMCCC_OWNER_HYPERVISOR 5
+#define ARM_SMCCC_OWNER_TRUSTED_APP 48
+#define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
+#define ARM_SMCCC_OWNER_TRUSTED_OS 50
+#define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
+
+/* List of generic function numbers */
+#define ARM_SMCCC_FUNC_CALL_COUNT 0xFF00
+#define ARM_SMCCC_FUNC_CALL_UID 0xFF01
+#define ARM_SMCCC_FUNC_CALL_REVISION 0xFF03
+
+/* Only one error code defined in SMCCC */
+#define ARM_SMCCC_ERR_UNKNOWN_FUNCTION (-1)
+
+/* SMCCC function identifier range which is reserved for existing APIs */
+#define ARM_SMCCC_RESERVED_RANGE_START 0x0
+#define ARM_SMCCC_RESERVED_RANGE_END 0x0100FFFF
+
+#endif /* __ASM_ARM_SMCCC_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:b
+ */
--
2.7.4
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next prev parent reply other threads:[~2017-10-10 15:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-10 15:52 [PATCH v8 00/11] Handle SMCs and HVCs in conformance with SMCCC Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 01/11] arm: traps: use only least 32 bits of fid in PSCI handler Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 02/11] arm: traps: use generic register accessors in the PSCI code Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 03/11] arm: traps: check if SMC was conditional before handling it Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 04/11] public: xen.h: add definitions for UUID handling Volodymyr Babchuk
2017-10-10 16:12 ` Jan Beulich
2017-10-10 17:03 ` Volodymyr Babchuk
2017-10-11 8:07 ` Jan Beulich
2017-10-11 12:12 ` Volodymyr Babchuk
2017-10-11 12:23 ` Jan Beulich
2017-10-10 19:05 ` [PATCH v9 " Volodymyr Babchuk
2017-10-10 23:24 ` Stefano Stabellini
2017-10-11 8:54 ` Jan Beulich
2017-10-11 9:29 ` Julien Grall
2017-10-11 9:37 ` Jan Beulich
2017-10-11 11:57 ` [PATCH v10 " Volodymyr Babchuk
2017-10-11 12:31 ` Jan Beulich
2017-10-11 15:37 ` Konrad Rzeszutek Wilk
2017-10-10 15:52 ` [PATCH v8 05/11] arm: processor.h: add definition for immediate value mask Volodymyr Babchuk
2017-10-10 15:52 ` Volodymyr Babchuk [this message]
2017-10-10 15:52 ` [PATCH v8 07/11] arm: smccc: handle SMCs according to SMCCC Volodymyr Babchuk
2017-10-11 20:38 ` Stefano Stabellini
2017-10-10 15:52 ` [PATCH v8 08/11] arm: traps: handle PSCI calls inside `vsmc.c` Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 09/11] arm: PSCI: use definitions provided by asm/smccc.h Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 10/11] arm: vsmc: remove 64 bit mode check in PSCI handler Volodymyr Babchuk
2017-10-10 15:52 ` [PATCH v8 11/11] public: add and enable XENFEAT_ARM_SMCCC_supported feature Volodymyr Babchuk
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