zircon/system/dev/bus/platform/device-resources.cpp

// 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 "device-resources.h"

#include <utility>

namespace {

template <typename T>
bool CopyResources(size_t in_count, const T* in_list, fbl::Array<T>* out) {
    if (!in_count) {
        return true;
    }
    fbl::AllocChecker ac;
    out->reset(new (&ac) T[in_count], in_count);
    if (!ac.check()) {
        return false;
    }
    memcpy(out->begin(), in_list, in_count * sizeof(T));
    return true;
}

} // namespace

namespace platform_bus {

zx_status_t DeviceResources::Init(const pbus_dev_t* pdev) {
    if (!CopyResources(pdev->mmio_count, pdev->mmio_list, &mmios_) ||
        !CopyResources(pdev->irq_count, pdev->irq_list, &irqs_) ||
        !CopyResources(pdev->gpio_count, pdev->gpio_list, &gpios_) ||
        !CopyResources(pdev->clk_count, pdev->clk_list, &clks_) ||
        !CopyResources(pdev->bti_count, pdev->bti_list, &btis_) ||
        !CopyResources(pdev->smc_count, pdev->smc_list, &smcs_) ||
        !CopyResources(pdev->metadata_count, pdev->metadata_list, &metadata_) ||
        !CopyResources(pdev->boot_metadata_count, pdev->boot_metadata_list, &boot_metadata_)) {
        return ZX_ERR_NO_MEMORY;
    }

    return ZX_OK;
}

} // namespace platform_bus