Hello, On 1/29/20 5:07 PM, Cameron Ferguson wrote: >> I don't understand where this 0x10000 comes from. x86 I/O ports are 16-bits. > > In order to write to ACPI addres 0x460, I can do this: > > *(unsigned *)(0x10460) = 0; > This works fine on x86. In the code you sent last time, it said that your addresses are IORESOURCE_IO. These are I/O ports, not memory-mapped ports, so you can't dereference a pointer and access them, but instead you have to use port I/O instruction, which in barebox and Linux is the out[bwl] family of functions. > Barebox is missing the function "acpi_get_table". I briefly looked > into copying it from the Linux kernel but after a few minutes I just > decided to copy the hex values and hard-code them into my program. barebox passes the table to the drivers, look in the acpi-test.c example, how it gets the sdt pointer. That should be the one you are after. > I'm still tinkering about with this. Still no joy. Here's what I have now: That's too much code to read through.. I suspect you are just clobbering random memory, when you should be writing I/O ports instead. Cheers Ahmad -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
