More definitively set up each cpu's SCTLR_EL1 instead of relying on any
default values being present. Also set all RES1 values to 1 according to
what is useful at the moment, generally giving the maximum amount of
priviledges EL1 and EL0.
1) Decode FSC and dump more human readable status
2) Add support of stack unwinding as referred from
arm64 procedure call standard and frame pointer usage.
3) Compiler options for not omitting frame pointer
are enabled to ensure usage of frame pointers even
with higher optimization levels enabled.
Signed-off-by: vannapurve <vannapurve@google.com>
Now you need to include arch/atomic.h to get to the atomic routines.
This simplifies a recusion issue in the way arch/ops.h included
arch_ops. Also just generally makes things cleaner.
Almost nothing changes here except moving braces to the same line as the
function declaration. Everything else is largely whitespace changes and
a few dangling files with tab indents.
See scripts/codestyle
Enable fiqs at boot, and during exceptions that can trigger a
context switch.
This fixes two problems. It avoids deadlock in code that uses spinlocks
with fiqs enabled as one cpu could be holding that spinlock and get
interrupted by an fiq, while another cpu is blocked trying to lock that
spinlock with fiqs disabled. This deadlocks if the fiq is delivered to
both these cpus and the second cpu is responsible to clearing the
interrupt.
Also, since thread_preempt can return with fiqs enabled,
regrestore_short could get interrupted by an fiq which would then
corrupt elr_el1 and spsr_el1.
Change-Id: I427f39ff94514866bf87f48393d145b7f1723502
There are several use cases for this:
- Generic kernel on a system with fewer cpus.
- Systems with two clusters that cannot run concurrently.
- LK as the secure os on a system where secondary cpus do not
boot until the non-secure os boots.
Change-Id: I17917944c485ff4ac581c159b4abba05471ee5b8
-in arm start.S, calculate and move the current binary to the proper physical
location before enabling the mmu.
-add arch_chain_load which does the necessary translations from virtual to
physical, tries to gracefully shut the system down, and branches into the loaded binary.
