HP-UX Reference (11i v3 07/02) - 1M System Administration Commands A-M (vol 3)

boot(1M) boot(1M)

NAME

boot - bootstrap process

DESCRIPTION

Itanium-based System Hardware

An Itanium-based system’s bootstrap process involves the execution of four software components:

• CMOS

• option ROM

• EFI

• Boot Manager

• hpux.efi (see hpux.eﬁ(1M)).

After the processor is reset, ﬁrmware initializes and tests processors and platform. During initialization,

the ﬁrmware lets a user interrupt and conﬁgure CMOS and option ROMs. It then transfers control to EFI,

the Extensible Firmware Interface. EFI, in turn, initializes EFI boot and runtime services and launches

the Boot Manager. The Boot Manager, which allows loading of EFI application or drivers from EFI deﬁned

ﬁle system, loads and transfers control to hpux.efi, the HP-UX-speciﬁc bootstrap loader.

hpux.efi

then loads the HP-UX kernel object ﬁle from the HP-UX ﬁle system to memory and transfers control to the

loaded kernel image.

PA-RISC Hardware

The PA-RSIC bootstrap process involves the execution of three software components:

• pdc (see pdc(1M),

• isl (see isl(1M), and

• hpux (see hpux(1M).

After the processor is RESET, pdc, the processor-dependent code (ﬁrmware), performs a self-test and

initializes the processor. It then loads and transfers control to

isl, the operating-system-independent ini-

tial system loader.

isl, in turn, loads and transfers control to the hpux utility, the HP-UX-speciﬁc

bootstrap loader.

hpux then downloads the HP-UX kernel object ﬁle from an HP-UX ﬁle system and

transfers control to the loaded kernel image.