1. A method of initializing a control utility in a computing environment, said method comprising: performing, by a processor, a boot sequence to boot the control utility in a selected architectural mode which is based on a selected architecture, the control utility written for the selected architecture and configured to be initialized in at least one of a first architectural configuration that initializes in one architecture and switches to the selected architecture for processing, or in a second architectural configuration that initializes and processes in the selected architecture, and wherein the performing the boot sequence comprises: executing one or more instructions irrespective of whether the processor is to perform initialization based on the first architectural configuration or the second architectural configuration, the one or more instructions common to the one architecture and the selected architecture in that the one or more instructions are defined in the one architecture and the selected architecture, and the executing comprising executing a switch operation to request a switch of architectural modes for the processor regardless of whether the processor is to perform initialization in the one architecture or the selected architecture, wherein the switch operation performs differently based on which architecture, the one architecture or the selected architecture, the processor is to perform initialization, and based on executing the switch operation, the control utility is booted in the selected architectural mode.