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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build arm64
package ring0
// Useful bits.
const (
_PGD_PGT_BASE = 0x1000
_PGD_PGT_SIZE = 0x1000
_PUD_PGT_BASE = 0x2000
_PUD_PGT_SIZE = 0x1000
_PMD_PGT_BASE = 0x3000
_PMD_PGT_SIZE = 0x4000
_PTE_PGT_BASE = 0x7000
_PTE_PGT_SIZE = 0x1000
)
const (
// DAIF bits:debug, sError, IRQ, FIQ.
_PSR_D_BIT = 0x00000200
_PSR_A_BIT = 0x00000100
_PSR_I_BIT = 0x00000080
_PSR_F_BIT = 0x00000040
_PSR_DAIF_SHIFT = 6
_PSR_DAIF_MASK = 0xf << _PSR_DAIF_SHIFT
// PSR bits.
_PSR_MODE_EL0t = 0x00000000
_PSR_MODE_EL1t = 0x00000004
_PSR_MODE_EL1h = 0x00000005
_PSR_MODE_MASK = 0x0000000f
PsrFlagsClear = _PSR_MODE_MASK | _PSR_DAIF_MASK
PsrModeMask = _PSR_MODE_MASK
// KernelFlagsSet should always be set in the kernel.
KernelFlagsSet = _PSR_MODE_EL1h | _PSR_D_BIT | _PSR_A_BIT | _PSR_I_BIT | _PSR_F_BIT
// UserFlagsSet are always set in userspace.
UserFlagsSet = _PSR_MODE_EL0t
)
// Vector is an exception vector.
type Vector uintptr
// Exception vectors.
const (
El1InvSync = iota
El1InvIrq
El1InvFiq
El1InvError
El1Sync
El1Irq
El1Fiq
El1Err
El0Sync
El0Irq
El0Fiq
El0Err
El0InvSync
El0InvIrq
El0InvFiq
El0InvErr
El1SyncDa
El1SyncIa
El1SyncSpPc
El1SyncUndef
El1SyncDbg
El1SyncInv
El0SyncSVC
El0SyncDa
El0SyncIa
El0SyncFpsimdAcc
El0SyncSveAcc
El0SyncSys
El0SyncSpPc
El0SyncUndef
El0SyncDbg
El0SyncInv
El0ErrNMI
El0ErrBounce
_NR_INTERRUPTS
)
// System call vectors.
const (
Syscall Vector = El0SyncSVC
PageFault Vector = El0SyncDa
VirtualizationException Vector = El0ErrBounce
)
// VirtualAddressBits returns the number bits available for virtual addresses.
func VirtualAddressBits() uint32 {
return 48
}
// PhysicalAddressBits returns the number of bits available for physical addresses.
func PhysicalAddressBits() uint32 {
return 40
}
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