Sun Microsystems Fire X4800, Руководство по установке

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I/O and Interrupt Resource Allocation
The BIOS allocates I/O and interrupt resources when the system boots. If your system includes
many I/O devices, it might not have enough of these resources for all of them. In this case, you
can reconfigure the BIOS to allocate resources to specific devices.
The resources include:
■
I/O space and option ROM – See “Option ROM and I/O Space Allocation” on page 125 .
■
MSI interrupt assignments – See “Allocating MSI Interrupt Space (Oracle Solaris OS Only)”
on page 132 .
Option ROM and I/O Space Allocation
Bootable devices such as onboard I/O or PCIe express modules require option ROM and I/O
space to boot. However the total option ROM and I/O space for the system is limited by the PC
architecture and is allocated automatically when the system is booted. If your system includes
many potentially bootable devices, you must decide which ones you wish to boot from, and
configure the BIOS to allocate these resources to them.
Option ROM is also required to run some configuration utilities, such as the LSI RAID
configuration utility. This utility, which resides in the REM, has option ROM and I/O space
allocated to it by default.
Note –
These limitations apply to eight–socket systems only. Four–socket systems do not
normally encounter option ROM or I/O space limitations.
In systems with the Oracle Solaris OS, an additional limitation might limit your ability to
hotplug devices in EM slots 4 and 5.
Option ROM Allocation
The PC architecture provides a total of 128 Kbytes of option ROM space.
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