mirror of https://github.com/acidanthera/audk.git
552 lines
17 KiB
ArmAsm
552 lines
17 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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# Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#------------------------------------------------------------------------------
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#include <Chipset/AArch64.h>
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#include <AsmMacroIoLibV8.h>
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.text
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.align 3
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GCC_ASM_EXPORT (ArmInvalidateInstructionCache)
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GCC_ASM_EXPORT (ArmInvalidateDataCacheEntryByMVA)
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GCC_ASM_EXPORT (ArmCleanDataCacheEntryByMVA)
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GCC_ASM_EXPORT (ArmCleanDataCacheEntryToPoUByMVA)
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GCC_ASM_EXPORT (ArmInvalidateInstructionCacheEntryToPoUByMVA)
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GCC_ASM_EXPORT (ArmCleanInvalidateDataCacheEntryByMVA)
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GCC_ASM_EXPORT (ArmInvalidateDataCacheEntryBySetWay)
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GCC_ASM_EXPORT (ArmCleanDataCacheEntryBySetWay)
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GCC_ASM_EXPORT (ArmCleanInvalidateDataCacheEntryBySetWay)
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GCC_ASM_EXPORT (ArmEnableMmu)
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GCC_ASM_EXPORT (ArmDisableMmu)
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GCC_ASM_EXPORT (ArmDisableCachesAndMmu)
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GCC_ASM_EXPORT (ArmMmuEnabled)
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GCC_ASM_EXPORT (ArmEnableDataCache)
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GCC_ASM_EXPORT (ArmDisableDataCache)
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GCC_ASM_EXPORT (ArmEnableInstructionCache)
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GCC_ASM_EXPORT (ArmDisableInstructionCache)
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GCC_ASM_EXPORT (ArmDisableAlignmentCheck)
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GCC_ASM_EXPORT (ArmEnableAlignmentCheck)
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GCC_ASM_EXPORT (ArmEnableBranchPrediction)
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GCC_ASM_EXPORT (ArmDisableBranchPrediction)
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GCC_ASM_EXPORT (AArch64AllDataCachesOperation)
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GCC_ASM_EXPORT (ArmDataMemoryBarrier)
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GCC_ASM_EXPORT (ArmDataSynchronizationBarrier)
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GCC_ASM_EXPORT (ArmInstructionSynchronizationBarrier)
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GCC_ASM_EXPORT (ArmWriteVBar)
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GCC_ASM_EXPORT (ArmReadVBar)
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GCC_ASM_EXPORT (ArmEnableVFP)
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GCC_ASM_EXPORT (ArmCallWFI)
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GCC_ASM_EXPORT (ArmReadMpidr)
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GCC_ASM_EXPORT (ArmReadTpidrurw)
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GCC_ASM_EXPORT (ArmWriteTpidrurw)
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GCC_ASM_EXPORT (ArmIsArchTimerImplemented)
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GCC_ASM_EXPORT (ArmReadIdPfr0)
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GCC_ASM_EXPORT (ArmReadIdPfr1)
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GCC_ASM_EXPORT (ArmWriteHcr)
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GCC_ASM_EXPORT (ArmReadHcr)
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GCC_ASM_EXPORT (ArmReadCurrentEL)
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GCC_ASM_EXPORT (ArmReplaceLiveTranslationEntry)
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GCC_ASM_EXPORT (ArmReplaceLiveTranslationEntrySize)
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.set CTRL_M_BIT, (1 << 0)
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.set CTRL_A_BIT, (1 << 1)
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.set CTRL_C_BIT, (1 << 2)
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.set CTRL_I_BIT, (1 << 12)
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.set CTRL_V_BIT, (1 << 12)
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.set CPACR_VFP_BITS, (3 << 20)
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ASM_PFX(ArmInvalidateDataCacheEntryByMVA):
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dc ivac, x0 // Invalidate single data cache line
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ret
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ASM_PFX(ArmCleanDataCacheEntryByMVA):
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dc cvac, x0 // Clean single data cache line
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ret
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ASM_PFX(ArmCleanDataCacheEntryToPoUByMVA):
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dc cvau, x0 // Clean single data cache line to PoU
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ret
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ASM_PFX(ArmInvalidateInstructionCacheEntryToPoUByMVA):
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ic ivau, x0 // Invalidate single instruction cache line to PoU
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ret
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ASM_PFX(ArmCleanInvalidateDataCacheEntryByMVA):
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dc civac, x0 // Clean and invalidate single data cache line
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ret
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ASM_PFX(ArmInvalidateDataCacheEntryBySetWay):
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dc isw, x0 // Invalidate this line
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ret
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ASM_PFX(ArmCleanInvalidateDataCacheEntryBySetWay):
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dc cisw, x0 // Clean and Invalidate this line
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ret
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ASM_PFX(ArmCleanDataCacheEntryBySetWay):
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dc csw, x0 // Clean this line
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ret
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ASM_PFX(ArmInvalidateInstructionCache):
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ic iallu // Invalidate entire instruction cache
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dsb sy
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isb
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ret
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ASM_PFX(ArmEnableMmu):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Read System control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Read System control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Read System control register EL3
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4: orr x0, x0, #CTRL_M_BIT // Set MMU enable bit
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EL1_OR_EL2_OR_EL3(x1)
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1: tlbi vmalle1
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dsb nsh
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isb
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msr sctlr_el1, x0 // Write back
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b 4f
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2: tlbi alle2
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dsb nsh
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isb
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msr sctlr_el2, x0 // Write back
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b 4f
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3: tlbi alle3
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dsb nsh
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isb
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msr sctlr_el3, x0 // Write back
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4: isb
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ret
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ASM_PFX(ArmDisableMmu):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Read System Control Register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Read System Control Register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Read System Control Register EL3
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4: and x0, x0, #~CTRL_M_BIT // Clear MMU enable bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back
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tlbi vmalle1
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b 4f
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2: msr sctlr_el2, x0 // Write back
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tlbi alle2
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b 4f
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3: msr sctlr_el3, x0 // Write back
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tlbi alle3
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmDisableCachesAndMmu):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: mov x1, #~(CTRL_M_BIT | CTRL_C_BIT | CTRL_I_BIT) // Disable MMU, D & I caches
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and x0, x0, x1
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmMmuEnabled):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: and x0, x0, #CTRL_M_BIT
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ret
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ASM_PFX(ArmEnableDataCache):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: orr x0, x0, #CTRL_C_BIT // Set C bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmDisableDataCache):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: and x0, x0, #~CTRL_C_BIT // Clear C bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmEnableInstructionCache):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: orr x0, x0, #CTRL_I_BIT // Set I bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmDisableInstructionCache):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: and x0, x0, #~CTRL_I_BIT // Clear I bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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ASM_PFX(ArmEnableAlignmentCheck):
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EL1_OR_EL2(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 3f
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2: mrs x0, sctlr_el2 // Get control register EL2
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3: orr x0, x0, #CTRL_A_BIT // Set A (alignment check) bit
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EL1_OR_EL2(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 3f
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2: msr sctlr_el2, x0 // Write back control register
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3: dsb sy
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isb
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ret
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ASM_PFX(ArmDisableAlignmentCheck):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, sctlr_el1 // Get control register EL1
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b 4f
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2: mrs x0, sctlr_el2 // Get control register EL2
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b 4f
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3: mrs x0, sctlr_el3 // Get control register EL3
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4: and x0, x0, #~CTRL_A_BIT // Clear A (alignment check) bit
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EL1_OR_EL2_OR_EL3(x1)
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1: msr sctlr_el1, x0 // Write back control register
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b 4f
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2: msr sctlr_el2, x0 // Write back control register
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b 4f
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3: msr sctlr_el3, x0 // Write back control register
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4: dsb sy
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isb
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ret
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// Always turned on in AArch64. Else implementation specific. Leave in for C compatibility for now
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ASM_PFX(ArmEnableBranchPrediction):
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ret
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// Always turned on in AArch64. Else implementation specific. Leave in for C compatibility for now.
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ASM_PFX(ArmDisableBranchPrediction):
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ret
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ASM_PFX(AArch64AllDataCachesOperation):
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// We can use regs 0-7 and 9-15 without having to save/restore.
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// Save our link register on the stack. - The stack must always be quad-word aligned
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str x30, [sp, #-16]!
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mov x1, x0 // Save Function call in x1
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mrs x6, clidr_el1 // Read EL1 CLIDR
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and x3, x6, #0x7000000 // Mask out all but Level of Coherency (LoC)
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lsr x3, x3, #23 // Left align cache level value - the level is shifted by 1 to the
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// right to ease the access to CSSELR and the Set/Way operation.
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cbz x3, L_Finished // No need to clean if LoC is 0
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mov x10, #0 // Start clean at cache level 0
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Loop1:
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add x2, x10, x10, lsr #1 // Work out 3x cachelevel for cache info
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lsr x12, x6, x2 // bottom 3 bits are the Cache type for this level
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and x12, x12, #7 // get those 3 bits alone
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cmp x12, #2 // what cache at this level?
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b.lt L_Skip // no cache or only instruction cache at this level
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msr csselr_el1, x10 // write the Cache Size selection register with current level (CSSELR)
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isb // isb to sync the change to the CacheSizeID reg
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mrs x12, ccsidr_el1 // reads current Cache Size ID register (CCSIDR)
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and x2, x12, #0x7 // extract the line length field
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add x2, x2, #4 // add 4 for the line length offset (log2 16 bytes)
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mov x4, #0x400
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sub x4, x4, #1
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and x4, x4, x12, lsr #3 // x4 is the max number on the way size (right aligned)
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clz w5, w4 // w5 is the bit position of the way size increment
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mov x7, #0x00008000
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sub x7, x7, #1
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and x7, x7, x12, lsr #13 // x7 is the max number of the index size (right aligned)
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Loop2:
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mov x9, x4 // x9 working copy of the max way size (right aligned)
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Loop3:
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lsl x11, x9, x5
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orr x0, x10, x11 // factor in the way number and cache number
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lsl x11, x7, x2
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orr x0, x0, x11 // factor in the index number
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blr x1 // Goto requested cache operation
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subs x9, x9, #1 // decrement the way number
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b.ge Loop3
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subs x7, x7, #1 // decrement the index
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b.ge Loop2
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L_Skip:
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add x10, x10, #2 // increment the cache number
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cmp x3, x10
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b.gt Loop1
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L_Finished:
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dsb sy
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isb
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ldr x30, [sp], #0x10
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ret
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ASM_PFX(ArmDataMemoryBarrier):
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dmb sy
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ret
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ASM_PFX(ArmDataSynchronizationBarrier):
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dsb sy
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ret
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ASM_PFX(ArmInstructionSynchronizationBarrier):
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isb
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ret
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ASM_PFX(ArmWriteVBar):
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EL1_OR_EL2_OR_EL3(x1)
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1: msr vbar_el1, x0 // Set the Address of the EL1 Vector Table in the VBAR register
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b 4f
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2: msr vbar_el2, x0 // Set the Address of the EL2 Vector Table in the VBAR register
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b 4f
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3: msr vbar_el3, x0 // Set the Address of the EL3 Vector Table in the VBAR register
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4: isb
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ret
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ASM_PFX(ArmReadVBar):
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EL1_OR_EL2_OR_EL3(x1)
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1: mrs x0, vbar_el1 // Set the Address of the EL1 Vector Table in the VBAR register
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ret
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2: mrs x0, vbar_el2 // Set the Address of the EL2 Vector Table in the VBAR register
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ret
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3: mrs x0, vbar_el3 // Set the Address of the EL3 Vector Table in the VBAR register
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ret
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ASM_PFX(ArmEnableVFP):
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// Check whether floating-point is implemented in the processor.
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mov x1, x30 // Save LR
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bl ArmReadIdPfr0 // Read EL1 Processor Feature Register (PFR0)
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mov x30, x1 // Restore LR
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ands x0, x0, #AARCH64_PFR0_FP// Extract bits indicating VFP implementation
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cmp x0, #0 // VFP is implemented if '0'.
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b.ne 4f // Exit if VFP not implemented.
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// FVP is implemented.
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// Make sure VFP exceptions are not trapped (to any exception level).
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mrs x0, cpacr_el1 // Read EL1 Coprocessor Access Control Register (CPACR)
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orr x0, x0, #CPACR_VFP_BITS // Disable FVP traps to EL1
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msr cpacr_el1, x0 // Write back EL1 Coprocessor Access Control Register (CPACR)
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mov x1, #AARCH64_CPTR_TFP // TFP Bit for trapping VFP Exceptions
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EL1_OR_EL2_OR_EL3(x2)
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1:ret // Not configurable in EL1
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2:mrs x0, cptr_el2 // Disable VFP traps to EL2
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bic x0, x0, x1
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msr cptr_el2, x0
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ret
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3:mrs x0, cptr_el3 // Disable VFP traps to EL3
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bic x0, x0, x1
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msr cptr_el3, x0
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4:ret
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ASM_PFX(ArmCallWFI):
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wfi
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ret
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ASM_PFX(ArmReadMpidr):
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mrs x0, mpidr_el1 // read EL1 MPIDR
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ret
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// Keep old function names for C compatibilty for now. Change later?
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ASM_PFX(ArmReadTpidrurw):
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mrs x0, tpidr_el0 // read tpidr_el0 (v7 TPIDRURW) -> (v8 TPIDR_EL0)
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ret
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// Keep old function names for C compatibilty for now. Change later?
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ASM_PFX(ArmWriteTpidrurw):
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msr tpidr_el0, x0 // write tpidr_el0 (v7 TPIDRURW) -> (v8 TPIDR_EL0)
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ret
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// Arch timers are mandatory on AArch64
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ASM_PFX(ArmIsArchTimerImplemented):
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mov x0, #1
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ret
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ASM_PFX(ArmReadIdPfr0):
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mrs x0, id_aa64pfr0_el1 // Read ID_AA64PFR0 Register
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ret
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// Q: id_aa64pfr1_el1 not defined yet. What does this funtion want to access?
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// A: used to setup arch timer. Check if we have security extensions, permissions to set stuff.
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// See: ArmPkg/Library/ArmArchTimerLib/AArch64/ArmArchTimerLib.c
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// Not defined yet, but stick in here for now, should read all zeros.
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ASM_PFX(ArmReadIdPfr1):
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mrs x0, id_aa64pfr1_el1 // Read ID_PFR1 Register
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ret
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|
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// VOID ArmWriteHcr(UINTN Hcr)
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ASM_PFX(ArmWriteHcr):
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msr hcr_el2, x0 // Write the passed HCR value
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|
ret
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|
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// UINTN ArmReadHcr(VOID)
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ASM_PFX(ArmReadHcr):
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|
mrs x0, hcr_el2
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|
ret
|
|
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// UINTN ArmReadCurrentEL(VOID)
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|
ASM_PFX(ArmReadCurrentEL):
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|
mrs x0, CurrentEL
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|
ret
|
|
|
|
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|
.macro __replace_entry, el
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|
|
|
// disable the MMU
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|
mrs x8, sctlr_el\el
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|
bic x9, x8, #CTRL_M_BIT
|
|
msr sctlr_el\el, x9
|
|
isb
|
|
|
|
// write updated entry
|
|
str x1, [x0]
|
|
|
|
// invalidate again to get rid of stale clean cachelines that may
|
|
// have been filled speculatively since the last invalidate
|
|
dmb sy
|
|
dc ivac, x0
|
|
|
|
// flush the TLBs
|
|
.if \el == 1
|
|
tlbi vmalle1
|
|
.else
|
|
tlbi alle\el
|
|
.endif
|
|
dsb sy
|
|
|
|
// re-enable the MMU
|
|
msr sctlr_el\el, x8
|
|
isb
|
|
.endm
|
|
|
|
//VOID
|
|
//ArmReplaceLiveTranslationEntry (
|
|
// IN UINT64 *Entry,
|
|
// IN UINT64 Value
|
|
// )
|
|
ASM_PFX(ArmReplaceLiveTranslationEntry):
|
|
|
|
// disable interrupts
|
|
mrs x2, daif
|
|
msr daifset, #0xf
|
|
isb
|
|
|
|
// clean and invalidate first so that we don't clobber
|
|
// adjacent entries that are dirty in the caches
|
|
dc civac, x0
|
|
dsb ish
|
|
|
|
EL1_OR_EL2_OR_EL3(x3)
|
|
1:__replace_entry 1
|
|
b 4f
|
|
2:__replace_entry 2
|
|
b 4f
|
|
3:__replace_entry 3
|
|
|
|
4:msr daif, x2
|
|
ret
|
|
|
|
ASM_PFX(ArmReplaceLiveTranslationEntrySize):
|
|
.long . - ArmReplaceLiveTranslationEntry
|
|
|
|
ASM_FUNCTION_REMOVE_IF_UNREFERENCED
|