Just FYI... On Tue, Sep 21, 2004 at 02:41:42PM -0400, John Baldwin wrote: > Umm, 0xa0000 is the start of Video RAM, so I sure hope the ACPI wake code > doesn't try to write code into Video memory. The pmap_invalidate_page is > certainly needed. This is more common than you'd think, by the way. The 0xA0000 range is sometimes used as a place to hold 'hidden memory' used whilst servicing an SMI; ie the pages are 'stolen' from main memory by the during BIOS initialization using registers for APM/ACPI support in the chipset. Sometimes this is referred to as SMRAM or Systems Management Memory (SMM). I posted some code just over a year ago illustrating how to access this 'hidden segment' on the i440BX to the lists. BMSReceived on Wed Sep 22 2004 - 07:04:33 UTC
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