inteltool - dumps Intel CPU/chipset configuration settings

A little used tool from the coreboot project is inteltool. This tool is useful for dumping the configuration space of Intel CPUs and for examining the Northbridge and Southbridge settings.

The debian package can be found in universe, and can be installed using:

sudo apt-get install inteltool

..and has to be run using sudo.

At the simplest level, it can be run to get CPU and Northbridge/Southbridge version information:

$ sudo inteltool
Intel CPU: Family 6, Model f
Intel Northbridge: 8086:2a00 (PM965)
Intel Southbridge: 8086:2815 (ICH8-M)

However, one can drill down a bit, for example to get a dump of the GPIO settings, use the -g flag, e.g.:

$ sudo inteltool -g
Intel CPU: Family 6, Model f
Intel Northbridge: 8086:2a00 (PM965)
Intel Southbridge: 8086:2815 (ICH8-M)

============= GPIOS =============

GPIOBASE = 0x1180 (IO)

gpiobase+0x0000: 0x99541d02 (GPIO_USE_SEL)
gpiobase+0x0004: 0xe0fa7fc2 (GP_IO_SEL)
gpiobase+0x0008: 0x00000000 (RESERVED)
gpiobase+0x000c: 0xe1aa5fc7 (GP_LVL)
gpiobase+0x0010: 0x00000000 (GPIO_USE_SEL Override (LOW))
gpiobase+0x0014: 0x00000000 (RESERVED)
gpiobase+0x0018: 0x00000000 (GPO_BLINK)
gpiobase+0x001c: 0x00000000 (GP_SER_BLINK)
gpiobase+0x0020: 0x00080000 (GP_SB_CMDSTS)
gpiobase+0x0024: 0x00000000 (GP_SB_DATA)
gpiobase+0x0028: 0x00000000 (RESERVED)
gpiobase+0x002c: 0x00001900 (GPI_INV)
gpiobase+0x0030: 0x00000146 (GPIO_USE_SEL2)
gpiobase+0x0034: 0x00540f70 (GP_IO_SEL2)
gpiobase+0x0038: 0x00540f74 (GP_LVL2)
gpiobase+0x003c: 0x00000000 (GPIO_USE_SEL Override (HIGH))

There are other options to dump out the RCBA, Power Management, Memory Controller, EPBAR, DMIBAR and PCIEXBAR registers as well as the CPU MSRs.

It's an excellent utility for digging into the configuration of any Intel PC.