system/ulib/hypervisor/phys_mem.cpp

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <hypervisor/phys_mem.h>

#include <zircon/process.h>
#include <zx/vmar.h>

static const uint32_t kMapFlags = ZX_VM_FLAG_PERM_READ | ZX_VM_FLAG_PERM_WRITE;

zx_status_t PhysMem::Init(size_t size) {
    zx_status_t status = zx::vmo::create(size, 0, &vmo_);
    if (status != ZX_OK)
        return status;

    status = zx::vmar::root_self().map(0, vmo_, 0, size, kMapFlags, &addr_);
    if (status != ZX_OK) {
        vmo_.reset();
        return status;
    }

    vmo_size_ = size;
    return ZX_OK;
}

PhysMem::~PhysMem() {
    if (addr_ != 0) {
        zx::vmar::root_self().unmap(addr_, vmo_size_);
    }
}