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Diffstat (limited to 'flashrom.8')
| -rw-r--r-- | flashrom.8 | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -299,6 +299,23 @@ is the I/O port number (must be a multiple of 8). In the unlikely case flashrom doesn't detect an active IT87 LPC<->SPI bridge, please send a bug report so we can diagnose the problem. .sp +If you have an Intel chipset with an ICH6 or later southbridge and if you want +to set specific IDSEL values for a non-default flash chip or an embedded +controller (EC), you can use the +.sp +.B " flashrom \-p internal:fwh_idsel=value" +.sp +syntax where value is the 48-bit hexadecimal raw value to be written in the +IDSEL registers of the Intel southbridge. The upper 32 bits use one hex digit +each per 512 kB range between 0xffc00000 and 0xffffffff, and the lower 16 bits +use one hex digit each per 1024 kB range between 0xff400000 and 0xff7fffff. +The rightmost hex digit corresponds with the lowest address range. All address +ranges have a corresponding sister range 4 MB below with identical IDSEL +settings. The default value for ICH7 is given in the example below. +.sp +Example: +.B "flashrom \-p internal:fwh_idsel=0x001122334567" +.sp Using flashrom on laptops is dangerous and may easily make your hardware unusable (see also the .B BUGS |