freebsd-dev/stand/i386
Toomas Soome 7f505e7f79 test if port does exist via using scratch register
The SCR, scratch register was not present on the 8250 and 8250B UART, so we
can use to test if we actually do have serial port.

We need this test because some systems will get long delays while attempting
to write to non-existing port and this will slow down the console IO
to extreme.

MFC after:	1 week
2020-03-12 06:45:08 +00:00
..
boot0 Centralize several variables. 2018-02-02 06:32:26 +00:00
boot0sio
boot2 Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
btx btx: rename .s files to .S to use Clang IAS 2018-11-26 19:14:33 +00:00
cdboot stand: remove CLANG_NO_IAS from cdboot 2019-08-15 17:32:39 +00:00
common Use symbolic names for int13 calls 2019-12-16 21:52:12 +00:00
gptboot Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
gptzfsboot Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
isoboot Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
libfirewire biospci_write_config args were backwards 2019-01-08 20:01:56 +00:00
libi386 test if port does exist via using scratch register 2020-03-12 06:45:08 +00:00
loader veloader use vectx API for kernel and modules 2020-03-09 16:02:54 +00:00
loader_4th Update Makefile.depend files 2019-12-11 17:37:53 +00:00
loader_lua Create a loader for each interpreter for x86 BIOS and all EFI 2018-08-14 18:44:41 +00:00
loader_simp Create a loader for each interpreter for x86 BIOS and all EFI 2018-08-14 18:44:41 +00:00
mbr stand/i386: rename .s to .S to use Clang IAS 2018-12-03 19:16:34 +00:00
pmbr stand/i386: rename .s to .S to use Clang IAS 2018-12-03 19:16:34 +00:00
pxeldr stand: remove CLANG_NO_IAS from pxeldr 2019-08-15 17:59:22 +00:00
zfsboot Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
boot.ldscript Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00
Makefile Remove kgzip and kgzldr. 2019-05-24 05:34:21 +00:00
Makefile.inc Link stand/i386 components using a linker script 2020-03-04 21:01:22 +00:00