72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
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// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ring0
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// New creates a new kernel.
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//
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// N.B. that constraints on KernelOpts must be satisfied.
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//
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// Init must have been called.
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func New(opts KernelOpts) *Kernel {
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k := new(Kernel)
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k.init(opts)
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return k
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}
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// NewCPU creates a new CPU associated with this Kernel.
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//
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// Note that execution of the new CPU must begin at Start, with constraints as
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// documented. Initialization is not completed by this method alone.
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//
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// See also Init.
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func (k *Kernel) NewCPU() *CPU {
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c := new(CPU)
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c.Init(k)
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return c
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}
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// Halt halts execution.
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func Halt()
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// Current returns the current CPU.
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//
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// Its use is only legal in the KernelSyscall and KernelException contexts,
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// which must all be guarded go:nosplit.
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func Current() *CPU
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// defaultSyscall is the default syscall hook.
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//
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//go:nosplit
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func defaultSyscall() { Halt() }
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// defaultException is the default exception hook.
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//
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//go:nosplit
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func defaultException(Vector) { Halt() }
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// Init allows the initialization of a CPU from a kernel without allocation.
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// The same constraints as NewCPU apply.
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//
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// Init allows embedding in other objects.
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func (c *CPU) Init(k *Kernel) {
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c.self = c // Set self reference.
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c.kernel = k // Set kernel reference.
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c.init() // Perform architectural init.
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// Defaults.
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c.KernelSyscall = defaultSyscall
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c.KernelException = defaultException
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}
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