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
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
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
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
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
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)
