lib/jor1k.js

"use strict";

// jor1k compatibility

var VIRTIO_MAGIC_REG = 0x0;
var VIRTIO_VERSION_REG = 0x4;
var VIRTIO_DEVICE_REG = 0x8;
var VIRTIO_VENDOR_REG = 0xc;
var VIRTIO_HOSTFEATURES_REG = 0x10;
var VIRTIO_HOSTFEATURESSEL_REG = 0x14;
var VIRTIO_GUESTFEATURES_REG = 0x20;
var VIRTIO_GUESTFEATURESSEL_REG = 0x24;
var VIRTIO_GUEST_PAGE_SIZE_REG = 0x28;
var VIRTIO_QUEUESEL_REG = 0x30;
var VIRTIO_QUEUENUMMAX_REG = 0x34;
var VIRTIO_QUEUENUM_REG = 0x38;
var VIRTIO_QUEUEALIGN_REG = 0x3C;
var VIRTIO_QUEUEPFN_REG = 0x40;
var VIRTIO_QUEUENOTIFY_REG = 0x50;
var VIRTIO_INTERRUPTSTATUS_REG = 0x60;
var VIRTIO_INTERRUPTACK_REG = 0x64;
var VIRTIO_STATUS_REG = 0x70;

/** @const */
var VRING_DESC_F_NEXT =      1; /* This marks a buffer as continuing via the next field. */
/** @const */
var VRING_DESC_F_WRITE =     2; /* This marks a buffer as write-only (otherwise read-only). */
/** @const */
var VRING_DESC_F_INDIRECT =  4; /* This means the buffer contains a list of buffer descriptors. */


function Swap16(x)
{ 
    // OR1K is big endian, therefore no conversion needed for us
    return x; 
}
function Swap32(x) 
{ 
    return x; 
}

function abort()
{ 
    if(DEBUG)
    {
        throw "abort"; 
    }
}

function hex8(n)
{
    return h(n);
}

/** @param {...string} log */
function DebugMessage(log)
{
    if(DEBUG)
    {
        console.log.apply(console, arguments);
    }
}

function LoadXMLResource(url, OnSuccess, OnError) {
    var req = new XMLHttpRequest();
    req.open('GET', url, true);
    //req.overrideMimeType('text/xml');
    req.onreadystatechange = function () {
        if (req.readyState != 4) {
            return;
        }
        if ((req.status != 200) && (req.status != 0)) {
            OnError("Error: Could not load XML file " + url);
            return;
        }        
        OnSuccess(req.responseText);        
    };
    req.send(null);
}


function LoadBinaryResource(url, OnSuccess, OnError) {
    var req = new XMLHttpRequest();
    req.open('GET', url, true);
    req.responseType = "arraybuffer";
    req.onreadystatechange = function () {
        if (req.readyState != 4) {
            return;
        }
        if ((req.status != 200) && (req.status != 0)) {
            OnError("Error: Could not load file " + url);
            return;
        }
        var arrayBuffer = req.response;
        if (arrayBuffer) {
            OnSuccess(arrayBuffer);
        } else {
            OnError("Error: No data received from: " + url);
        }
    };
    /*
        req.onload = function(e)
        {
                var arrayBuffer = req.response;
                if (arrayBuffer) {
                    OnLoadFunction(arrayBuffer);
                }
        };
    */
    req.send(null);
}