Commit graph

9 commits

Author SHA1 Message Date
Thomas Cort
4593804bf0 kernel: add padconf kernel call
On the AM335X, writes to the padconf registers must be done in privileged
mode. To allow userspace drivers to dynamically change the padconf at
runtime, a kernel call has been added.

Change-Id: I4b25d2879399b1785a360912faa0e90b5c258533
2013-08-28 12:53:05 -04:00
Ben Gras
c8f3b10909 fix a few more minix specific warnings
. also disable stack protection feature for gcc,
	  causes build errors for pkgsrc gcc on minix

Change-Id: I1c6e2bcb4d948098d642543d7b2711284ee55c72
2013-08-27 16:16:03 +00:00
Thomas Cort
6c6123d857 kernel: implement reboot for am335x/dm37xx
Change-Id: Ied288326b9af8f31223b2dd76a064e32c9a03c45
2013-08-05 10:23:00 -04:00
Thomas Cort
6d7eff8023 kernel: add support for am335x PMIC-base power-off
AM335X SoCs support power-off via a power management
chip (PMIC). An alarm in the real time clock is used
to trigger the PMIC to cut the power.

To ensure the alarm goes off when the system is in
a safe state, the RTC is frozen when the alarm is
set. At the last moment, the kernel unfreezes the RTC
to let the alarm go off.

This patch adds a mini driver for unfreezing the RTC
as well as code to handle RBT_POWEROFF on Minix/arm.

Change-Id: I7d48e75791e3a81bdd2f7704997193a269409fe8
2013-08-05 10:22:59 -04:00
Thomas Cort
2dab6a5384 kernel: i2c padconf workaround
The padconf library runs in user mode, but to actually affect the
padconf register contents, the processor has to be in privileged
mode. A full server based solution will be developed, but for now
just set the pinmux in the kernel at boot.

Change-Id: I170ed54dae64b27cd9bd8807445231598fb8e3e1
2013-07-15 11:11:13 -04:00
Lionel Sambuc
e4fa9802cb ARM: Enable caches
First round, some more optimizations are possible and should be
activated.

Change-Id: I3b7dee7c82fbffd823a08bec1c5d5ebcf769f92f
2013-02-18 09:08:26 +01:00
Lionel Sambuc
b36292e232 ARM: Fix interrupt management
Interrupts where not correctly masked while in kernel, which
breaks one of the current main assumptions.

Also remove some duplication on ARM asm files, and add a function
to check the status of ARM irqs (not compiled by default)

Change-Id: I3c25d2b388f93fd8fe423998b94b3c4f140ba831
2013-02-18 09:07:55 +01:00
Ben Gras
e3e5cf6d34 arm: make signal handlers work
A few kernel and calling convention adjustments to make sigsend and
sigreturn work for arm.

	. provide a arch_proc_setcontext for earm in kernel
	. set LR in context of signal handler to provide a proper
	  return address (to __sigreturn)
	. change __sigreturn to retrieve the sigcontext pointer
	  from the sigframe struct and pass it to _sigreturn() in r0

Change-Id: Icd135a70595382c79d11d8dd9876f6a6f1df41f8
2013-01-30 04:10:12 +00:00
Lionel Sambuc
b1c4ba4ab6 ARM updates
Due to the ABI we are using we have to use the earm architecture
moniker for the build system to behave correctly. This involves
then some headers to move around.

There is also a few related Makefile updates as well as minor
source code corrections.
2013-01-17 10:03:58 +01:00
Renamed from kernel/arch/arm/arch_system.c (Browse further)