HP-UX Reference (11i v2 03/08) - 1M System Administration Commands A-M (vol 3)

b
boot(1M) boot(1M)
NAME
boot - bootstrap process
DESCRIPTION
Itanium-based System Hardware
The Itanium-based system’s bootstrap process involves the execution of four software components:
• CMOS
• option ROM
• EFI
• Boot Manager
•
hpux.efi
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 Series 700 and 800 bootstrap process involves the execution of three software components:
• pdc (see pdc(1M),
•
isl (see isl(1M), and
•
hpux.
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
initial 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.
SEE ALSO
efi(4), hpux(1M), isl(1M), pdc(1M).
HP-UX 11i Version 2: August 2003 − 1 − Hewlett-Packard Company Section 1M−−69