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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
_PSR_D_BIT = 0x00000200
_PSR_A_BIT = 0x00000100
_PSR_I_BIT = 0x00000080
_PSR_F_BIT = 0x00000040
)
const (
// PSR bits
PSR_MODE_EL0t = 0x00000000
PSR_MODE_EL1t = 0x00000004
PSR_MODE_EL1h = 0x00000005
PSR_MODE_MASK = 0x0000000f
// KernelFlagsSet should always be set in the kernel.
KernelFlagsSet = PSR_MODE_EL1h
// UserFlagsSet are always set in userspace.
UserFlagsSet = PSR_MODE_EL0t
KernelFlagsClear = PSR_MODE_MASK
UserFlagsClear = PSR_MODE_MASK
PsrDefaultSet = _PSR_D_BIT | _PSR_A_BIT | _PSR_I_BIT | _PSR_F_BIT
)
// Vector is an exception vector.
type Vector uintptr
// Exception vectors.
const (
El1SyncInvalid = iota
El1IrqInvalid
El1FiqInvalid
El1ErrorInvalid
El1Sync
El1Irq
El1Fiq
El1Error
El0Sync
El0Irq
El0Fiq
El0Error
El0Sync_invalid
El0Irq_invalid
El0Fiq_invalid
El0Error_invalid
El1Sync_da
El1Sync_ia
El1Sync_sp_pc
El1Sync_undef
El1Sync_dbg
El1Sync_inv
El0Sync_svc
El0Sync_da
El0Sync_ia
El0Sync_fpsimd_acc
El0Sync_sve_acc
El0Sync_sys
El0Sync_sp_pc
El0Sync_undef
El0Sync_dbg
El0Sync_inv
_NR_INTERRUPTS
)
// System call vectors.
const (
Syscall Vector = El0Sync_svc
PageFault Vector = El0Sync_da
VirtualizationException Vector = El0Error
)
// 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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