lib/magma/src/magma_util/platform/zircon/zircon_platform_address_range.cc

// Copyright 2018 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 "platform_address_range.h"

#include "magma_util/macros.h"
#include <zx/vmar.h>
#include <zx/vmo.h>

namespace magma {

class ZirconPlatformAddressRange : public PlatformAddressRange {
public:
    ~ZirconPlatformAddressRange() override {}

    ZirconPlatformAddressRange(zx::vmar vmar, uint64_t address, uint64_t size)
        : vmar_(std::move(vmar)), address_(address), size_(size)
    {
    }

    uint64_t address() override { return address_; }
    uint64_t size() override { return size_; }

private:
    zx::vmar vmar_;
    uint64_t address_;
    uint64_t size_;
};

std::unique_ptr<PlatformAddressRange> PlatformAddressRange::Create(uint64_t size)
{
    uint64_t address;
    zx::vmar vmar;
    zx_status_t status = zx::vmar::root_self()->allocate(0, size, 0, &vmar, &address);
    if (status != ZX_OK)
        return DRETP(nullptr, "zx_vmar_allocate failed: %x", status);
    return std::make_unique<ZirconPlatformAddressRange>(std::move(vmar), address, size);
}

} // namespace magma