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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-09-10 18:46:23 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-09-10 18:46:23 +0000 |
| commit | 58e92b394ee359d2768abdace4dab7baf73c1231 (patch) | |
| tree | c723c4befc93ae50846029ab809e2125dc1de9a3 /ArmPkg/Library/ArmHvcLib | |
| parent | ae9bc0576c6aac3ee2f1aaa4e44f611eb706ec90 (diff) | |
| download | edk2-58e92b394ee359d2768abdace4dab7baf73c1231.zip edk2-58e92b394ee359d2768abdace4dab7baf73c1231.tar.gz edk2-58e92b394ee359d2768abdace4dab7baf73c1231.tar.bz2 | |
ArmPkg: Add ArmHvcLib
This is a utility library closely modeled after ArmSmcLib, that allows
hypervisor call (HVC) instructions to be issued from C code.
Change-Id: I5f5c65f83e910ff98dbb2f5b031dad8c4f663daa
Contributed-under: TianoCore Contribution Agreement 1.0
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16088 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Library/ArmHvcLib')
| -rw-r--r-- | ArmPkg/Library/ArmHvcLib/AArch64/ArmHvc.S | 42 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.S | 53 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.asm | 53 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmHvcLib/ArmHvcLib.inf | 32 |
4 files changed, 180 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmHvcLib/AArch64/ArmHvc.S b/ArmPkg/Library/ArmHvcLib/AArch64/ArmHvc.S new file mode 100644 index 0000000..a15ae03 --- /dev/null +++ b/ArmPkg/Library/ArmHvcLib/AArch64/ArmHvc.S @@ -0,0 +1,42 @@ +//
+// Copyright (c) 2012-2014, ARM Limited. All rights reserved.
+// Copyright (c) 2014, Linaro Limited. All rights reserved.
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php
+//
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+//
+
+.text
+.align 3
+
+GCC_ASM_EXPORT(ArmCallHvc)
+
+ASM_PFX(ArmCallHvc):
+ // Push x0 on the stack
+ str x0, [sp, #-8]!
+
+ // Load the HVC arguments values into the appropriate registers
+ ldp x6, x7, [x0, #48]
+ ldp x4, x5, [x0, #32]
+ ldp x2, x3, [x0, #16]
+ ldp x0, x1, [x0, #0]
+
+ hvc #0
+
+ // Pop the ARM_HVC_ARGS structure address from the stack into x9
+ ldr x9, [sp], #8
+
+ // Store the HVC returned values into the appropriate registers
+ // A HVC call can return up to 4 values
+ stp x2, x3, [x9, #16]
+ stp x0, x1, [x9, #0]
+
+ mov x0, x9
+
+ ret
diff --git a/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.S b/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.S new file mode 100644 index 0000000..25ceb6a --- /dev/null +++ b/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.S @@ -0,0 +1,53 @@ +//
+// Copyright (c) 2012-2014, ARM Limited. All rights reserved.
+// Copyright (c) 2014, Linaro Limited. All rights reserved.
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php
+//
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+//
+
+.text
+.align 3
+.arch_extension virt
+
+GCC_ASM_EXPORT(ArmCallHvc)
+
+ASM_PFX(ArmCallHvc):
+ push {r4-r8}
+ // r0 will be popped just after the HVC call
+ push {r0}
+
+ // Load the HVC arguments values into the appropriate registers
+ ldr r7, [r0, #28]
+ ldr r6, [r0, #24]
+ ldr r5, [r0, #20]
+ ldr r4, [r0, #16]
+ ldr r3, [r0, #12]
+ ldr r2, [r0, #8]
+ ldr r1, [r0, #4]
+ ldr r0, [r0, #0]
+
+ hvc #0
+
+ // Pop the ARM_HVC_ARGS structure address from the stack into r8
+ pop {r8}
+
+ // Load the HVC returned values into the appropriate registers
+ // A HVC call can return up to 4 values - we do not need to store back r4-r7.
+ str r3, [r8, #12]
+ str r2, [r8, #8]
+ str r1, [r8, #4]
+ str r0, [r8, #0]
+
+ mov r0, r8
+
+ // Restore the registers r4-r8
+ pop {r4-r8}
+
+ bx lr
diff --git a/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.asm b/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.asm new file mode 100644 index 0000000..bac26fb --- /dev/null +++ b/ArmPkg/Library/ArmHvcLib/Arm/ArmHvc.asm @@ -0,0 +1,53 @@ +//
+// Copyright (c) 2012-2014, ARM Limited. All rights reserved.
+// Copyright (c) 2014, Linaro Limited. All rights reserved.
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php
+//
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+//
+
+ EXPORT ArmCallHvc
+
+ AREA ArmHvc, CODE, READONLY
+
+ArmCallHvc
+ push {r4-r8}
+ // r0 will be popped just after the HVC call
+ push {r0}
+
+ // Load the HVC arguments values into the appropriate registers
+ ldr r7, [r0, #28]
+ ldr r6, [r0, #24]
+ ldr r5, [r0, #20]
+ ldr r4, [r0, #16]
+ ldr r3, [r0, #12]
+ ldr r2, [r0, #8]
+ ldr r1, [r0, #4]
+ ldr r0, [r0, #0]
+
+ hvc #0
+
+ // Pop the ARM_HVC_ARGS structure address from the stack into r8
+ pop {r8}
+
+ // Load the HVC returned values into the appropriate registers
+ // A HVC call can return up to 4 values - we do not need to store back r4-r7.
+ str r3, [r8, #12]
+ str r2, [r8, #8]
+ str r1, [r8, #4]
+ str r0, [r8, #0]
+
+ mov r0, r8
+
+ // Restore the registers r4-r8
+ pop {r4-r8}
+
+ bx lr
+
+ END
diff --git a/ArmPkg/Library/ArmHvcLib/ArmHvcLib.inf b/ArmPkg/Library/ArmHvcLib/ArmHvcLib.inf new file mode 100644 index 0000000..92efac5 --- /dev/null +++ b/ArmPkg/Library/ArmHvcLib/ArmHvcLib.inf @@ -0,0 +1,32 @@ +#/** @file
+#
+# Copyright (c) 2012-2013, ARM Ltd. All rights reserved.<BR>
+# Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = ArmHvcLib
+ FILE_GUID = E594959A-D150-44D3-963B-BA90329D3D9A
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmHvcLib
+
+[Sources.ARM]
+ Arm/ArmHvc.asm | RVCT
+ Arm/ArmHvc.S | GCC
+
+[Sources.AARCH64]
+ AArch64/ArmHvc.S
+
+[Packages]
+ MdePkg/MdePkg.dec
+ ArmPkg/ArmPkg.dec
|