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AsmMacroIoLib.h and AsmMacroIoLibV8.h are used by the CompilerIntrinsicsLib, which is moving to MdePkg. These functions provide standard definitions for ARM/AARCH64 assembly code, respectively, and so are moved to the arch directories in MdePkg to avoid MdePkg having a dependency on ArmPkg. Now that the files are in Arm/ and AArch64/ directories, the filenames are changed to AsmMacroLib.h as we can distinguish the architecture from the path. AsmMacroIoLib.inc is unused and so is removed. Continuous-integration-options: PatchCheck.ignore-multi-package Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>
80 lines
1.8 KiB
ArmAsm
80 lines
1.8 KiB
ArmAsm
//
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// Copyright (c) 2024, Google Llc. All rights reserved.
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//
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//
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#include <AsmMacroLib.h>
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/** Monitor call.
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An HyperVisor Call (HVC) or System Monitor Call (SMC) will be issued
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depending on the default conduit. PcdMonitorConduitHvc determines the type
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of the call: if true, do an HVC.
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@param [in,out] Args Arguments for the HVC/SMC.
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**/
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ASM_FUNC(ArmMonitorCall)
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// Create a stack frame
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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// Preserve X0 for later use
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mov x30, x0
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// Load the SMCCC arguments values into the appropriate registers
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ldp x0, x1, [x30, #0]
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ldp x2, x3, [x30, #16]
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ldp x4, x5, [x30, #32]
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ldp x6, x7, [x30, #48]
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ldp x8, x9, [x30, #64]
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ldp x10, x11, [x30, #80]
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ldp x12, x13, [x30, #96]
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ldp x14, x15, [x30, #112]
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ldp x16, x17, [x30, #128]
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#if !defined(_PCD_VALUE_PcdMonitorConduitHvc)
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#error
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#elif _PCD_VALUE_PcdMonitorConduitHvc == 0
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smc #0
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#elif _PCD_VALUE_PcdMonitorConduitHvc == 1
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hvc #0
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#else
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#error
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#endif
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// A SMCCC SMC64/HVC64 call can return up to 18 values.
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stp x0, x1, [x30, #0]
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stp x2, x3, [x30, #16]
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stp x4, x5, [x30, #32]
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stp x6, x7, [x30, #48]
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stp x8, x9, [x30, #64]
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stp x10, x11, [x30, #80]
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stp x12, x13, [x30, #96]
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stp x14, x15, [x30, #112]
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stp x16, x17, [x30, #128]
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// Clear return values from registers
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mov x0, xzr
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mov x1, xzr
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mov x2, xzr
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mov x3, xzr
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mov x4, xzr
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mov x5, xzr
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mov x6, xzr
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mov x7, xzr
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mov x8, xzr
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mov x9, xzr
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mov x10, xzr
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mov x11, xzr
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mov x12, xzr
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mov x13, xzr
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mov x14, xzr
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mov x15, xzr
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mov x16, xzr
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mov x17, xzr
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ldp x29, x30, [sp], #16
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ret
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