I didn't realize this was an editable field in the CMS. Well, supposing you only have one HomePage, this should work.. Let's assume the field you're looking for on your homepage is called "GlobalText".

class Page_Controller extends Content_Controller
{

function Text()
{
return singleton('HomePage')->GlobalText;
}
}

Sorry, i tried your code, doesnt work for me. Any further ideas?

Please post all of your code for HomePage.php, Page.php and the relevant part of Page.ss

Actually, before you do that, try

DataObject::get_one('HomePage')->GlobalText;

Ok, here we go

HomePage.php:

class HomePage extends Page {

   static $db = array(
      'varText' => 'Varchar(25)'
   );

   function getCMSFields() {
      $fields = parent::getCMSFields();
      $fields->addFieldToTab('Root.Content.Global', new TextField('varText'), 'Content');
      return $fields;
   }
}

class HomePage_Controller extends Page_Controller {
}

Page.php:

class Page extends SiteTree {
    static $db = array(
    );
}

class Page_Controller extends ContentController {
   function Text() { 
      return singleton('HomePage')->varText; 
   }
}

Page.ss

$Text

HF

assuming that you only have one page defined as a 'HomePage', then this should work:

class Page_Controller extends ContentController {
    function Text() {
        return DataObject::get_one('HomePage')->varText;
    }
}

I took yor code. Works fine now. Thanks Hamish and Uncle for your help.

deleted