Hi, > > Note: All these tests are done with CONFIG_DEBUG_LEVEL=0, using > > CONFIG_DEBUG_LEVEL=1 the boot time grows up to 24 ms, maybe we should > > put CONFIG_DEBUG_LEVEL=0 in the SeaBIOS configuration used in QEMU. > > I think the main seabios binary should have CONFIG_DEBUG_LEVEL=1 as it > helps with debug reports. I suppose an additional binary could be > made for those looking for the fastest possible speed. (The sole cost > of the debugging is the additional hardware accesses that results from > those debug messages.)
The qemu debugcon (CONFIG_DEBUG_IO) is detecable at runtime, it returns 0xe9 on port reads. So we should be able to skip that too. IIRC it isn't *that* straightforward as seabios is initially mapped read/only so a simple probe-on-first-putchar, then cache the result in a variable doesn't work. We could probe after make_bios_writable though which should still avoid printing most of the messages. cheers, Gerd _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org https://mail.coreboot.org/mailman/listinfo/seabios
