src-test2/sys/dev/syscons/apm, branch release/11.4.0

Revert r330897:

2018-03-29T02:50:57Z

This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code. Revert with prejudice. This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes. Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes. Requested by: gjb (re)

Partial merge of the SPDX changes

2018-03-14T03:19:51Z

These changes are incomplete but are making it difficult to determine what other changes can/should be merged. No objections from: pfg

APM was calling the suspend process from a timeout. This meant that

2006-05-25T23:06:38Z

other timeouts could not happen while suspending, including timeouts for things like msleep. This caused the system to hang on suspend when the cbb was enabled, since its suspend path powered down the socket which used a timeout to wait for it to be done. APM now creates a thread when it is enabled, and deletes the thread when it is disabled. This thread takes the place of the timeout by doing its polling every ~.9s. When the thread is disabled, it will wakeup early, otherwise it times out and polls the varius things the old timeout polled (APM events, suspend delays, etc). This makes my Sony VAIO 505TS suspend/resume correctly when APM is enabled (ACPI is black listed on my 505TS). This will likely fix other problems with the suspend path where drivers would sleep with msleep and/or do other timeouts. Maybe there's some special case code that would use DELAY while suspending and msleep otherwise that can be revisited and removed. This was also tested by glebius@, who pointed out that in the patch I sent him, I'd forgotten apm_saver.c MFC After: 3 weeks

No need to ifdef this pc98.

2005-04-04T05:28:19Z

Catch up with recent events.

2003-03-27T07:37:02Z

Use repo-copied files in sys/i386/bios.

2003-03-24T19:14:46Z

Added dependency on the apm(4) module.

2003-02-15T21:22:19Z

Remove __P.

2002-03-20T06:48:11Z

Added necessary include for pc98.

2001-01-25T09:56:04Z

Added PC-98 apm support.

2001-01-22T11:27:25Z

Submitted by: MURAMATSU Atsushi