boot.1m (2010 09)

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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
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
hpux(1M), hpux.efi(1M), isl(1M), pdc(1M), efi(4).
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1