zircon/system/dev/board/astro/astro-sysmem.cc

// Copyright 2019 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 <ddk/debug.h>
#include <ddk/device.h>
#include <ddk/platform-defs.h>
#include <ddk/protocol/platform/bus.h>
#include <zircon/device/sysmem.h>

#include "astro.h"

namespace astro {

static const pbus_bti_t sysmem_btis[] = {
    {
        .iommu_index = 0,
        .bti_id = BTI_SYSMEM,
    },
};

static const sysmem_metadata_t sysmem_metadata = {
    .vid = PDEV_VID_AMLOGIC,
    .pid = PDEV_PID_AMLOGIC_S905D2,
    .protected_memory_size = 16 * 1024 * 1024,
    // Support h.264 5.1, which has a max DPB size of 70,778,880 bytes (with
    // NV12), and add some extra size for additional pictures for buffering
    // and several framebuffers (1024*608*4 bytes each).
    .contiguous_memory_size = 100 * 1024 * 1024,

};

static const pbus_metadata_t sysmem_metadata_list[] = {
    {
        .type = SYSMEM_METADATA,
        .data_buffer = &sysmem_metadata,
        .data_size = sizeof(sysmem_metadata),
    }};

static const pbus_dev_t sysmem_dev = []() {
    pbus_dev_t ret;
    ret.name = "sysmem";
    ret.vid = PDEV_VID_GENERIC;
    ret.pid = PDEV_PID_GENERIC;
    ret.did = PDEV_DID_SYSMEM;
    ret.bti_list = sysmem_btis;
    ret.bti_count = countof(sysmem_btis);
    ret.metadata_list = sysmem_metadata_list;
    ret.metadata_count = countof(sysmem_metadata_list);
    return ret;
}();

zx_status_t Astro::SysmemInit() {
    zx_status_t status = pbus_.ProtocolDeviceAdd(ZX_PROTOCOL_SYSMEM, &sysmem_dev);
    if (status != ZX_OK) {
        zxlogf(ERROR, "%s: ProtocolDeviceAdd failed %d\n", __func__, status);
        return status;
    }

    return ZX_OK;
}

} // namespace astro