Commit Graph

10 Commits

Author SHA1 Message Date
Andrew Turner
8ab09f8a4e Add a function to find the PSCI version the firmware implements from
outside the PSCI driver.

MFC after:	1 week
Sponsored by:	DARPA, AFRL
2018-01-09 15:57:09 +00:00
Ed Maste
a5c9ec376b psci: change bootverbose string to 'PSCI 0.2 compatible'
Prior to r324754 we treated PSCI 0.2 and 1.0 as identical, and r324754
extended that to include all PSCI 1.x revisions. Change the string
emitted under bootverbose to reference '0.2 compatible' to avoid
confusion when the system includes a later PSCI rev.

Discussed with:	andrew
Sponsored by:	The FreeBSD Foundation
2017-10-19 16:40:17 +00:00
Andrew Turner
833a983e5e Allow later PSCI revisions to also work. The latest ARM Trusted Firmware
reports version 1.1 so the check was failing. As thjis is a minor change
from 1.0, and future 1.x revisions are also expected to be backwards
compatible just ignore the minor revision in the init handler.

Sponsored by:	DARPA, AFRL
2017-10-19 13:22:52 +00:00
Andrew Turner
845ed71645 Also handle psci 1.0. This can be seen as a bug fix update for the 0.2
specification we already support, with the only changes in functions we
don't currently use.

Sponsored by:	DARPA, AFRL
2017-10-06 15:46:11 +00:00
Andrew Turner
574a7c6c47 Call the PSCI reset from cpu_reset on arm64. When rebooting from DDB the
kernel calls this directly so the event handler is not called, meaning
the computer fails to reboot.

Tested by:	cognet
MFC after:	1 week
Sponsored by:	DARPA, AFRL
2017-04-24 11:06:10 +00:00
Andrew Turner
2b5014f6fe Add ACPI support to the PSCI driver. This checks the Fixed ACPI Description
Table to find if the hardware supports PSCI, and if so what method the
kernel should use to interact with it.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
2016-12-07 14:24:53 +00:00
Andrew Turner
c2dd354bf4 Create a new PSCI error code and use it to signal that starting the CPU is
impossible as the PSCI firmware is missing.

Sponsored by:	ABT Systmes Ltd
2016-10-25 14:18:27 +00:00
Andrew Turner
6e3244f594 Start to support PSCI 1.0. For all the functions we currently support this
can be seen as the same as 0.2. There are changes with the data passed to
CPU_SUSPEND, however we don't yet use this call.

Sponsored by:	ABT Systems Ltd
2015-08-11 13:42:58 +00:00
Andrew Turner
7ad1ac7d6a Rework the PSCI cpu on code to allow it to work before device drivers have
started. This allows this functions to be used with the regular ARM SMP
initialisation sequence.
2015-05-24 11:08:06 +00:00
Andrew Turner
46b1fe9224 Add a driver for the ARM Power State Coordination Interface (PSCI). This
handles versions 0.1 and 0.2 of the standard on 32-bit ARM.

With this driver we can shutdown in QEMU. Further work is needed to
turn secondary cores on on boot and to support later revisions of the
specification.

Submitted by:	Robin Randhawa <Robin.Randhawa at ARM.com>
Sponsored by:	The FreeBSD Foundation
2015-04-12 13:00:58 +00:00